Prasad Sodagudi | 5af8792 | 2013-06-05 17:33:52 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved. |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | /* |
| 13 | * Qualcomm PM8XXX Pulse Width Modulation (PWM) driver |
| 14 | * |
| 15 | * The HW module is also called LPG (Light Pulse Generator). |
| 16 | */ |
| 17 | |
| 18 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 19 | |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/platform_device.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/err.h> |
| 24 | #include <linux/debugfs.h> |
| 25 | #include <linux/mfd/pm8xxx/core.h> |
| 26 | #include <linux/mfd/pm8xxx/pwm.h> |
| 27 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 28 | #define PM8XXX_PWM_CHANNELS 3 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 29 | |
Jay Chokshi | 0c220cd | 2011-12-09 17:18:20 -0800 | [diff] [blame] | 30 | /* |
| 31 | * For the lack of better term to distinguish functional |
| 32 | * differences, hereby, LPG version 0 (V0, v0) denotes |
| 33 | * PM8058/8921, and version 1 (V1, v1) denotes |
| 34 | * PM8922/8038. |
| 35 | */ |
| 36 | #define PM8XXX_LPG_V0_PWM_CHANNELS 8 |
| 37 | #define PM8XXX_LPG_V1_PWM_CHANNELS 6 |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 38 | #define PM8XXX_LPG_CTL_REGS 8 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 39 | |
| 40 | /* PM8XXX PWM */ |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 41 | #define SSBI_REG_ADDR_PWM1_CTRL1 0x88 |
| 42 | #define SSBI_REG_ADDR_PWM1_CTRL2 0x89 |
| 43 | #define SSBI_REG_ADDR_PWM_CTL(id, base) (id == 0 ? base : (base + (id << 1))) |
| 44 | #define SSBI_REG_ADDR_PWM_CTL1(id) SSBI_REG_ADDR_PWM_CTL(id, \ |
| 45 | SSBI_REG_ADDR_PWM1_CTRL1) |
| 46 | #define SSBI_REG_ADDR_PWM_CTL2(id) SSBI_REG_ADDR_PWM_CTL(id, \ |
| 47 | SSBI_REG_ADDR_PWM1_CTRL2) |
| 48 | |
| 49 | #define PM8XXX_PWM_CLK_SEL_SHIFT 6 |
| 50 | #define PM8XXX_PWM_CLK_SEL_MASK 0xC0 |
| 51 | #define PM8XXX_PWM_PREDIVIDE_SHIFT 5 |
| 52 | #define PM8XXX_PWM_PREDIVIDE_MASK 0x20 |
| 53 | #define PM8XXX_PWM_M_SHIFT 2 |
| 54 | #define PM8XXX_PWM_M_MASK 0x1C |
| 55 | #define PM8XXX_PWM_SIZE_SHIFT 1 |
| 56 | #define PM8XXX_PWM_SIZE_MASK 0x02 |
| 57 | #define PM8XXX_PWM_VALUE_BIT0 0x01 |
| 58 | #define PM8XXX_PWM_DISABLE 0x3F |
| 59 | |
| 60 | /* PM8XXX LPG PWM */ |
Prasad Sodagudi | 5af8792 | 2013-06-05 17:33:52 +0530 | [diff] [blame] | 61 | #define SSBI_REG_ADDR_LPG_BANK_LOW_EN 0x130 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 62 | #define SSBI_REG_ADDR_LPG_CTL_BASE 0x13C |
| 63 | #define SSBI_REG_ADDR_LPG_CTL(n) (SSBI_REG_ADDR_LPG_CTL_BASE + (n)) |
| 64 | #define SSBI_REG_ADDR_LPG_BANK_SEL 0x143 |
Prasad Sodagudi | 5af8792 | 2013-06-05 17:33:52 +0530 | [diff] [blame] | 65 | #define SSBI_REG_ADDR_LPG_BANK_HIGH_EN 0x144 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 66 | #define SSBI_REG_ADDR_LPG_LUT_CFG0 0x145 |
| 67 | #define SSBI_REG_ADDR_LPG_LUT_CFG1 0x146 |
Jay Chokshi | b0a0fa5 | 2012-02-23 16:18:44 -0800 | [diff] [blame] | 68 | #define SSBI_REG_ADDR_LPG_TEST 0x147 |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 69 | #define SSBI_REG_ADDR_LPG_CTL_7 0x14D |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 70 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 71 | /* LPG Control 0 */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 72 | #define PM8XXX_PWM_1KHZ_COUNT_MASK 0xF0 |
| 73 | #define PM8XXX_PWM_1KHZ_COUNT_SHIFT 4 |
| 74 | |
| 75 | #define PM8XXX_PWM_1KHZ_COUNT_MAX 15 |
| 76 | |
| 77 | #define PM8XXX_PWM_OUTPUT_EN 0x08 |
| 78 | #define PM8XXX_PWM_PWM_EN 0x04 |
| 79 | #define PM8XXX_PWM_RAMP_GEN_EN 0x02 |
| 80 | #define PM8XXX_PWM_RAMP_START 0x01 |
| 81 | |
| 82 | #define PM8XXX_PWM_PWM_START (PM8XXX_PWM_OUTPUT_EN \ |
| 83 | | PM8XXX_PWM_PWM_EN) |
| 84 | #define PM8XXX_PWM_RAMP_GEN_START (PM8XXX_PWM_RAMP_GEN_EN \ |
| 85 | | PM8XXX_PWM_RAMP_START) |
| 86 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 87 | /* LPG Control 1 */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 88 | #define PM8XXX_PWM_REVERSE_EN 0x80 |
| 89 | #define PM8XXX_PWM_BYPASS_LUT 0x40 |
| 90 | #define PM8XXX_PWM_HIGH_INDEX_MASK 0x3F |
| 91 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 92 | /* LPG Control 2 */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 93 | #define PM8XXX_PWM_LOOP_EN 0x80 |
| 94 | #define PM8XXX_PWM_RAMP_UP 0x40 |
| 95 | #define PM8XXX_PWM_LOW_INDEX_MASK 0x3F |
| 96 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 97 | /* LPG Control 3 */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 98 | #define PM8XXX_PWM_VALUE_BIT7_0 0xFF |
| 99 | #define PM8XXX_PWM_VALUE_BIT5_0 0x3F |
| 100 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 101 | /* LPG Control 4 */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 102 | #define PM8XXX_PWM_VALUE_BIT8 0x80 |
| 103 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 104 | #define PM8XXX_LPG_PWM_CLK_SEL_MASK 0x60 |
| 105 | #define PM8XXX_LPG_PWM_CLK_SEL_SHIFT 5 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 106 | |
| 107 | #define PM8XXX_PWM_CLK_SEL_NO 0 |
| 108 | #define PM8XXX_PWM_CLK_SEL_1KHZ 1 |
| 109 | #define PM8XXX_PWM_CLK_SEL_32KHZ 2 |
| 110 | #define PM8XXX_PWM_CLK_SEL_19P2MHZ 3 |
| 111 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 112 | #define PM8XXX_LPG_PWM_PREDIVIDE_MASK 0x18 |
| 113 | #define PM8XXX_LPG_PWM_PREDIVIDE_SHIFT 3 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 114 | |
| 115 | #define PM8XXX_PWM_PREDIVIDE_2 0 |
| 116 | #define PM8XXX_PWM_PREDIVIDE_3 1 |
| 117 | #define PM8XXX_PWM_PREDIVIDE_5 2 |
| 118 | #define PM8XXX_PWM_PREDIVIDE_6 3 |
| 119 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 120 | #define PM8XXX_LPG_PWM_M_MASK 0x07 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 121 | #define PM8XXX_PWM_M_MIN 0 |
| 122 | #define PM8XXX_PWM_M_MAX 7 |
| 123 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 124 | /* LPG Control 5 */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 125 | #define PM8XXX_PWM_PAUSE_COUNT_HI_MASK 0xFC |
| 126 | #define PM8XXX_PWM_PAUSE_COUNT_HI_SHIFT 2 |
| 127 | |
| 128 | #define PM8XXX_PWM_PAUSE_ENABLE_HIGH 0x02 |
| 129 | #define PM8XXX_PWM_SIZE_9_BIT 0x01 |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 130 | #define PM8XXX_PWM_SIZE_7_BIT 0x04 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 131 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 132 | /* LPG Control 6 */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 133 | #define PM8XXX_PWM_PAUSE_COUNT_LO_MASK 0xFC |
| 134 | #define PM8XXX_PWM_PAUSE_COUNT_LO_SHIFT 2 |
| 135 | |
| 136 | #define PM8XXX_PWM_PAUSE_ENABLE_LOW 0x02 |
| 137 | #define PM8XXX_PWM_RESERVED 0x01 |
| 138 | |
| 139 | #define PM8XXX_PWM_PAUSE_COUNT_MAX 56 /* < 2^6 = 64 */ |
| 140 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 141 | /* LPG LUT_CFG1 */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 142 | #define PM8XXX_PWM_LUT_READ 0x40 |
| 143 | |
Jay Chokshi | b0a0fa5 | 2012-02-23 16:18:44 -0800 | [diff] [blame] | 144 | /* TEST */ |
| 145 | #define PM8XXX_PWM_DTEST_MASK 0x38 |
| 146 | #define PM8XXX_PWM_DTEST_SHIFT 3 |
| 147 | #define PM8XXX_PWM_DTEST_BANK_MASK 0x07 |
Jay Chokshi | 4acbdd5 | 2011-09-16 17:09:44 -0700 | [diff] [blame] | 148 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 149 | /* |
| 150 | * PWM Frequency = Clock Frequency / (N * T) |
| 151 | * or |
| 152 | * PWM Period = Clock Period * (N * T) |
| 153 | * where |
| 154 | * N = 2^9 or 2^6 for 9-bit or 6-bit PWM size |
| 155 | * T = Pre-divide * 2^m, where m = 0..7 (exponent) |
| 156 | * |
| 157 | * This is the formula to figure out m for the best pre-divide and clock: |
Willie Ruan | 4a0a700 | 2012-01-10 15:39:44 -0800 | [diff] [blame] | 158 | * (PWM Period / N) = (Pre-divide * Clock Period) * 2^m |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 159 | */ |
| 160 | #define NUM_CLOCKS 3 |
| 161 | |
Willie Ruan | db78e94 | 2012-01-10 15:00:28 -0800 | [diff] [blame] | 162 | #define NSEC_1024HZ (NSEC_PER_SEC / 1024) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 163 | #define NSEC_32768HZ (NSEC_PER_SEC / 32768) |
| 164 | #define NSEC_19P2MHZ (NSEC_PER_SEC / 19200000) |
| 165 | |
Willie Ruan | b10be97 | 2012-01-12 11:30:11 -0800 | [diff] [blame] | 166 | #define NUM_LPG_PRE_DIVIDE 4 |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 167 | #define NUM_PWM_PRE_DIVIDE 2 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 168 | |
Jay Chokshi | 0c220cd | 2011-12-09 17:18:20 -0800 | [diff] [blame] | 169 | #define PRE_DIVIDE_1 1 /* v1 */ |
Willie Ruan | b10be97 | 2012-01-12 11:30:11 -0800 | [diff] [blame] | 170 | #define PRE_DIVIDE_2 2 |
| 171 | #define PRE_DIVIDE_3 3 |
| 172 | #define PRE_DIVIDE_5 5 |
| 173 | #define PRE_DIVIDE_6 6 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 174 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 175 | static unsigned int pt_t[NUM_LPG_PRE_DIVIDE][NUM_CLOCKS] = { |
Willie Ruan | db78e94 | 2012-01-10 15:00:28 -0800 | [diff] [blame] | 176 | { PRE_DIVIDE_2 * NSEC_1024HZ, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 177 | PRE_DIVIDE_2 * NSEC_32768HZ, |
| 178 | PRE_DIVIDE_2 * NSEC_19P2MHZ, |
| 179 | }, |
Willie Ruan | b10be97 | 2012-01-12 11:30:11 -0800 | [diff] [blame] | 180 | { PRE_DIVIDE_3 * NSEC_1024HZ, |
| 181 | PRE_DIVIDE_3 * NSEC_32768HZ, |
| 182 | PRE_DIVIDE_3 * NSEC_19P2MHZ, |
| 183 | }, |
| 184 | { PRE_DIVIDE_5 * NSEC_1024HZ, |
| 185 | PRE_DIVIDE_5 * NSEC_32768HZ, |
| 186 | PRE_DIVIDE_5 * NSEC_19P2MHZ, |
| 187 | }, |
| 188 | { PRE_DIVIDE_6 * NSEC_1024HZ, |
| 189 | PRE_DIVIDE_6 * NSEC_32768HZ, |
| 190 | PRE_DIVIDE_6 * NSEC_19P2MHZ, |
| 191 | }, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 192 | }; |
| 193 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 194 | /* Private data */ |
| 195 | struct pm8xxx_pwm_chip; |
| 196 | |
| 197 | struct pwm_device { |
| 198 | int pwm_id; /* = bank/channel id */ |
| 199 | int in_use; |
| 200 | const char *label; |
Willie Ruan | 719c676 | 2011-08-25 11:03:14 -0700 | [diff] [blame] | 201 | struct pm8xxx_pwm_period period; |
| 202 | int pwm_value; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 203 | int pwm_period; |
| 204 | int pwm_duty; |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 205 | u8 pwm_lpg_ctl[PM8XXX_LPG_CTL_REGS]; |
| 206 | u8 pwm_ctl1; |
| 207 | u8 pwm_ctl2; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 208 | int irq; |
| 209 | struct pm8xxx_pwm_chip *chip; |
Willie Ruan | 719c676 | 2011-08-25 11:03:14 -0700 | [diff] [blame] | 210 | int bypass_lut; |
Jay Chokshi | b0a0fa5 | 2012-02-23 16:18:44 -0800 | [diff] [blame] | 211 | int dtest_mode_supported; |
Prasad Sodagudi | 5af8792 | 2013-06-05 17:33:52 +0530 | [diff] [blame] | 212 | int banks; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 213 | }; |
| 214 | |
| 215 | struct pm8xxx_pwm_chip { |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 216 | struct pwm_device *pwm_dev; |
| 217 | u8 pwm_channels; |
| 218 | u8 pwm_total_pre_divs; |
Prasad Sodagudi | 5af8792 | 2013-06-05 17:33:52 +0530 | [diff] [blame] | 219 | u8 lo_bank_mask; |
| 220 | u8 hi_bank_mask; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 221 | struct mutex pwm_mutex; |
| 222 | struct device *dev; |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 223 | bool is_lpg_supported; |
Jay Chokshi | 9048522 | 2012-08-07 20:22:39 -0700 | [diff] [blame] | 224 | bool is_pwm_enable_sync_workaround_needed; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 225 | }; |
| 226 | |
| 227 | static struct pm8xxx_pwm_chip *pwm_chip; |
| 228 | |
Willie Ruan | 719c676 | 2011-08-25 11:03:14 -0700 | [diff] [blame] | 229 | struct pm8xxx_pwm_lut { |
| 230 | /* LUT parameters */ |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 231 | int lut_duty_ms; |
| 232 | int lut_lo_index; |
| 233 | int lut_hi_index; |
| 234 | int lut_pause_hi; |
| 235 | int lut_pause_lo; |
| 236 | int flags; |
| 237 | }; |
| 238 | |
| 239 | static const u16 duty_msec[PM8XXX_PWM_1KHZ_COUNT_MAX + 1] = { |
| 240 | 0, 1, 2, 3, 4, 6, 8, 16, 18, 24, 32, 36, 64, 128, 256, 512 |
| 241 | }; |
| 242 | |
| 243 | static const u16 pause_count[PM8XXX_PWM_PAUSE_COUNT_MAX + 1] = { |
| 244 | 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, |
| 245 | 23, 28, 31, 42, 47, 56, 63, 83, 94, 111, 125, 167, 188, 222, 250, 333, |
| 246 | 375, 500, 667, 750, 800, 900, 1000, 1100, |
| 247 | 1200, 1300, 1400, 1500, 1600, 1800, 2000, 2500, |
| 248 | 3000, 3500, 4000, 4500, 5000, 5500, 6000, 6500, |
| 249 | 7000 |
| 250 | }; |
| 251 | |
| 252 | /* Internal functions */ |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 253 | static void pm8xxx_pwm_save(u8 *u8p, u8 mask, u8 val) |
| 254 | { |
| 255 | *u8p &= ~mask; |
| 256 | *u8p |= val & mask; |
| 257 | } |
| 258 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 259 | static int pm8xxx_pwm_bank_enable(struct pwm_device *pwm, int enable) |
| 260 | { |
| 261 | int rc; |
| 262 | u8 reg; |
| 263 | struct pm8xxx_pwm_chip *chip; |
| 264 | |
| 265 | chip = pwm->chip; |
| 266 | |
Prasad Sodagudi | 6a79c84 | 2013-06-12 19:29:36 +0530 | [diff] [blame] | 267 | if (!pwm->banks) |
| 268 | pwm->banks = (PM_PWM_BANK_LO | PM_PWM_BANK_HI); |
| 269 | |
Prasad Sodagudi | 5af8792 | 2013-06-05 17:33:52 +0530 | [diff] [blame] | 270 | if (pwm->banks & PM_PWM_BANK_LO) { |
| 271 | if (enable) |
| 272 | reg = chip->lo_bank_mask | (1 << pwm->pwm_id); |
| 273 | else |
| 274 | reg = chip->lo_bank_mask & ~(1 << pwm->pwm_id); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 275 | |
Prasad Sodagudi | 5af8792 | 2013-06-05 17:33:52 +0530 | [diff] [blame] | 276 | rc = pm8xxx_writeb(chip->dev->parent, |
| 277 | SSBI_REG_ADDR_LPG_BANK_LOW_EN, reg); |
| 278 | if (rc) { |
| 279 | pr_err("pm8xxx_writeb(): Enable Bank Low =%d\n", rc); |
| 280 | return rc; |
| 281 | } |
| 282 | |
| 283 | chip->lo_bank_mask = reg; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 284 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 285 | |
Prasad Sodagudi | 5af8792 | 2013-06-05 17:33:52 +0530 | [diff] [blame] | 286 | if (pwm->banks & PM_PWM_BANK_HI) { |
| 287 | if (enable) |
| 288 | reg = chip->hi_bank_mask | (1 << pwm->pwm_id); |
| 289 | else |
| 290 | reg = chip->hi_bank_mask & ~(1 << pwm->pwm_id); |
| 291 | |
| 292 | rc = pm8xxx_writeb(chip->dev->parent, |
| 293 | SSBI_REG_ADDR_LPG_BANK_HIGH_EN, reg); |
| 294 | if (rc) { |
| 295 | pr_err("pm8xxx_writeb(): Enable Bank High =%d\n", rc); |
| 296 | return rc; |
| 297 | } |
| 298 | |
| 299 | chip->hi_bank_mask = reg; |
| 300 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 301 | return 0; |
| 302 | } |
| 303 | |
| 304 | static int pm8xxx_pwm_bank_sel(struct pwm_device *pwm) |
| 305 | { |
| 306 | int rc; |
| 307 | |
| 308 | rc = pm8xxx_writeb(pwm->chip->dev->parent, SSBI_REG_ADDR_LPG_BANK_SEL, |
| 309 | pwm->pwm_id); |
| 310 | if (rc) |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 311 | pr_err("pm8xxx_writeb(): rc=%d (Select PWM Bank)\n", rc); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 312 | return rc; |
| 313 | } |
| 314 | |
| 315 | static int pm8xxx_pwm_start(struct pwm_device *pwm, int start, int ramp_start) |
| 316 | { |
| 317 | int rc; |
| 318 | u8 reg; |
| 319 | |
| 320 | if (start) { |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 321 | reg = pwm->pwm_lpg_ctl[0] | PM8XXX_PWM_PWM_START; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 322 | if (ramp_start) |
| 323 | reg |= PM8XXX_PWM_RAMP_GEN_START; |
| 324 | else |
| 325 | reg &= ~PM8XXX_PWM_RAMP_GEN_START; |
| 326 | } else { |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 327 | reg = pwm->pwm_lpg_ctl[0] & ~PM8XXX_PWM_PWM_START; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 328 | reg &= ~PM8XXX_PWM_RAMP_GEN_START; |
| 329 | } |
| 330 | |
| 331 | rc = pm8xxx_writeb(pwm->chip->dev->parent, SSBI_REG_ADDR_LPG_CTL(0), |
| 332 | reg); |
| 333 | if (rc) |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 334 | pr_err("pm8xxx_writeb(): rc=%d (Enable PWM Ctl 0)\n", rc); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 335 | else |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 336 | pwm->pwm_lpg_ctl[0] = reg; |
| 337 | return rc; |
| 338 | } |
| 339 | |
| 340 | static int pm8xxx_pwm_disable(struct pwm_device *pwm) |
| 341 | { |
| 342 | int rc; |
| 343 | u8 reg; |
| 344 | |
| 345 | reg = pwm->pwm_ctl1 & PM8XXX_PWM_DISABLE; |
| 346 | |
| 347 | rc = pm8xxx_writeb(pwm->chip->dev->parent, |
| 348 | SSBI_REG_ADDR_PWM_CTL1(pwm->pwm_id), reg); |
| 349 | |
| 350 | if (rc) |
| 351 | pr_err("pm8xxx_writeb(): rc=%d (Disable PWM Ctl %d)\n", rc, |
| 352 | pwm->pwm_id); |
| 353 | return rc; |
| 354 | } |
| 355 | |
| 356 | static int pm8xxx_pwm_enable(struct pwm_device *pwm) |
| 357 | { |
| 358 | /** |
| 359 | * A kind of best Effort: Just write the clock information that |
| 360 | * we have in the register. |
| 361 | */ |
| 362 | int rc; |
| 363 | |
| 364 | rc = pm8xxx_writeb(pwm->chip->dev->parent, |
| 365 | SSBI_REG_ADDR_PWM_CTL1(pwm->pwm_id), pwm->pwm_ctl1); |
| 366 | |
| 367 | if (rc) |
| 368 | pr_err("pm8xxx_writeb(): rc=%d (Enable PWM Ctl %d)\n", rc, |
| 369 | pwm->pwm_id); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 370 | return rc; |
| 371 | } |
| 372 | |
| 373 | static void pm8xxx_pwm_calc_period(unsigned int period_us, |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 374 | struct pwm_device *pwm) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 375 | { |
| 376 | int n, m, clk, div; |
| 377 | int best_m, best_div, best_clk; |
Willie Ruan | 4a0a700 | 2012-01-10 15:39:44 -0800 | [diff] [blame] | 378 | unsigned int last_err, cur_err, min_err; |
| 379 | unsigned int tmp_p, period_n; |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 380 | struct pm8xxx_pwm_period *period = &pwm->period; |
| 381 | |
| 382 | if (pwm->banks == PM_PWM_BANK_LO) |
| 383 | n = 7; |
| 384 | else |
| 385 | n = 6; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 386 | |
| 387 | /* PWM Period / N */ |
Willie Ruan | 70f989d | 2012-01-10 10:09:36 -0800 | [diff] [blame] | 388 | if (period_us < ((unsigned)(-1) / NSEC_PER_USEC)) { |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 389 | period_n = (period_us * NSEC_PER_USEC) >> n; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 390 | } else { |
| 391 | period_n = (period_us >> 9) * NSEC_PER_USEC; |
| 392 | n = 9; |
| 393 | } |
| 394 | |
Willie Ruan | 4a0a700 | 2012-01-10 15:39:44 -0800 | [diff] [blame] | 395 | min_err = last_err = (unsigned)(-1); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 396 | best_m = 0; |
| 397 | best_clk = 0; |
| 398 | best_div = 0; |
| 399 | for (clk = 0; clk < NUM_CLOCKS; clk++) { |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 400 | for (div = 0; div < pwm_chip->pwm_total_pre_divs; div++) { |
Willie Ruan | 4a0a700 | 2012-01-10 15:39:44 -0800 | [diff] [blame] | 401 | /* period_n = (PWM Period / N) */ |
| 402 | /* tmp_p = (Pre-divide * Clock Period) * 2^m */ |
| 403 | tmp_p = pt_t[div][clk]; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 404 | for (m = 0; m <= PM8XXX_PWM_M_MAX; m++) { |
Willie Ruan | 4a0a700 | 2012-01-10 15:39:44 -0800 | [diff] [blame] | 405 | if (period_n > tmp_p) |
| 406 | cur_err = period_n - tmp_p; |
| 407 | else |
| 408 | cur_err = tmp_p - period_n; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 409 | |
Willie Ruan | 4a0a700 | 2012-01-10 15:39:44 -0800 | [diff] [blame] | 410 | if (cur_err < min_err) { |
| 411 | min_err = cur_err; |
| 412 | best_m = m; |
| 413 | best_clk = clk; |
| 414 | best_div = div; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 415 | } |
Willie Ruan | 4a0a700 | 2012-01-10 15:39:44 -0800 | [diff] [blame] | 416 | |
| 417 | if (m && cur_err > last_err) |
| 418 | /* Break for bigger cur_err */ |
| 419 | break; |
| 420 | |
| 421 | last_err = cur_err; |
| 422 | tmp_p <<= 1; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 423 | } |
| 424 | } |
| 425 | } |
| 426 | |
Willie Ruan | 75d9e5b | 2011-08-25 10:59:17 -0700 | [diff] [blame] | 427 | /* Use higher resolution */ |
| 428 | if (best_m >= 3 && n == 6) { |
| 429 | n += 3; |
| 430 | best_m -= 3; |
| 431 | } |
| 432 | |
Willie Ruan | 719c676 | 2011-08-25 11:03:14 -0700 | [diff] [blame] | 433 | period->pwm_size = n; |
| 434 | period->clk = best_clk; |
| 435 | period->pre_div = best_div; |
| 436 | period->pre_div_exp = best_m; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 437 | } |
| 438 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 439 | static void pm8xxx_pwm_calc_pwm_value(struct pwm_device *pwm, |
| 440 | unsigned int period_us, |
| 441 | unsigned int duty_us) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 442 | { |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 443 | unsigned int max_pwm_value, tmp; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 444 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 445 | /* Figure out pwm_value with overflow handling */ |
| 446 | tmp = 1 << (sizeof(tmp) * 8 - pwm->period.pwm_size); |
| 447 | if (duty_us < tmp) { |
| 448 | tmp = duty_us << pwm->period.pwm_size; |
| 449 | pwm->pwm_value = tmp / period_us; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 450 | } else { |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 451 | tmp = period_us >> pwm->period.pwm_size; |
| 452 | pwm->pwm_value = duty_us / tmp; |
| 453 | } |
| 454 | max_pwm_value = (1 << pwm->period.pwm_size) - 1; |
| 455 | if (pwm->pwm_value > max_pwm_value) |
| 456 | pwm->pwm_value = max_pwm_value; |
| 457 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 458 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 459 | static int pm8xxx_pwm_change_table(struct pwm_device *pwm, int duty_pct[], |
| 460 | int start_idx, int len, int raw_value) |
| 461 | { |
| 462 | unsigned int pwm_value, max_pwm_value; |
| 463 | u8 cfg0, cfg1; |
| 464 | int i, pwm_size; |
| 465 | int rc = 0; |
| 466 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 467 | pwm_size = (pwm->pwm_lpg_ctl[5] & PM8XXX_PWM_SIZE_9_BIT) ? 9 : 6; |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 468 | if (pwm->period.pwm_size == 7) |
| 469 | pwm_size = 7; |
| 470 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 471 | max_pwm_value = (1 << pwm_size) - 1; |
| 472 | for (i = 0; i < len; i++) { |
| 473 | if (raw_value) |
| 474 | pwm_value = duty_pct[i]; |
| 475 | else |
| 476 | pwm_value = (duty_pct[i] << pwm_size) / 100; |
| 477 | |
| 478 | if (pwm_value > max_pwm_value) |
| 479 | pwm_value = max_pwm_value; |
| 480 | cfg0 = pwm_value; |
| 481 | cfg1 = (pwm_value >> 1) & 0x80; |
| 482 | cfg1 |= start_idx + i; |
| 483 | |
| 484 | rc = pm8xxx_writeb(pwm->chip->dev->parent, |
| 485 | SSBI_REG_ADDR_LPG_LUT_CFG0, cfg0); |
| 486 | if (rc) |
| 487 | break; |
| 488 | |
| 489 | rc = pm8xxx_writeb(pwm->chip->dev->parent, |
| 490 | SSBI_REG_ADDR_LPG_LUT_CFG1, cfg1); |
| 491 | if (rc) |
| 492 | break; |
| 493 | } |
| 494 | return rc; |
| 495 | } |
| 496 | |
| 497 | static void pm8xxx_pwm_save_index(struct pwm_device *pwm, |
| 498 | int low_idx, int high_idx, int flags) |
| 499 | { |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 500 | pwm->pwm_lpg_ctl[1] = high_idx & PM8XXX_PWM_HIGH_INDEX_MASK; |
| 501 | pwm->pwm_lpg_ctl[2] = low_idx & PM8XXX_PWM_LOW_INDEX_MASK; |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 502 | |
| 503 | if (flags & PM_PWM_LUT_REVERSE) |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 504 | pwm->pwm_lpg_ctl[1] |= PM8XXX_PWM_REVERSE_EN; |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 505 | if (flags & PM_PWM_LUT_RAMP_UP) |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 506 | pwm->pwm_lpg_ctl[2] |= PM8XXX_PWM_RAMP_UP; |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 507 | if (flags & PM_PWM_LUT_LOOP) |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 508 | pwm->pwm_lpg_ctl[2] |= PM8XXX_PWM_LOOP_EN; |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | static void pm8xxx_pwm_save_period(struct pwm_device *pwm) |
| 512 | { |
| 513 | u8 mask, val; |
| 514 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 515 | if (pwm_chip->is_lpg_supported) { |
| 516 | val = ((pwm->period.clk + 1) << PM8XXX_LPG_PWM_CLK_SEL_SHIFT) |
| 517 | & PM8XXX_LPG_PWM_CLK_SEL_MASK; |
| 518 | val |= (pwm->period.pre_div << PM8XXX_LPG_PWM_PREDIVIDE_SHIFT) |
| 519 | & PM8XXX_LPG_PWM_PREDIVIDE_MASK; |
| 520 | val |= pwm->period.pre_div_exp & PM8XXX_LPG_PWM_M_MASK; |
| 521 | mask = PM8XXX_LPG_PWM_CLK_SEL_MASK | |
| 522 | PM8XXX_LPG_PWM_PREDIVIDE_MASK | PM8XXX_LPG_PWM_M_MASK; |
| 523 | pm8xxx_pwm_save(&pwm->pwm_lpg_ctl[4], mask, val); |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 524 | |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 525 | if (pwm->period.pwm_size == 7) { |
| 526 | val = PM8XXX_PWM_SIZE_7_BIT; |
| 527 | mask = PM8XXX_PWM_SIZE_7_BIT; |
| 528 | pm8xxx_pwm_save(&pwm->pwm_lpg_ctl[7], mask, val); |
| 529 | } else { |
| 530 | val = (pwm->period.pwm_size > 6) ? |
| 531 | PM8XXX_PWM_SIZE_9_BIT : 0; |
| 532 | mask = PM8XXX_PWM_SIZE_9_BIT; |
| 533 | pm8xxx_pwm_save(&pwm->pwm_lpg_ctl[5], mask, val); |
| 534 | } |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 535 | } else { |
| 536 | val = ((pwm->period.clk + 1) << PM8XXX_PWM_CLK_SEL_SHIFT) |
| 537 | & PM8XXX_PWM_CLK_SEL_MASK; |
| 538 | val |= (pwm->period.pre_div << PM8XXX_PWM_PREDIVIDE_SHIFT) |
| 539 | & PM8XXX_PWM_PREDIVIDE_MASK; |
| 540 | val |= (pwm->period.pre_div_exp << PM8XXX_PWM_M_SHIFT) |
| 541 | & PM8XXX_PWM_M_MASK; |
| 542 | val |= (((pwm->period.pwm_size > 6) ? PM8XXX_PWM_SIZE_9_BIT : 0) |
| 543 | << PM8XXX_PWM_SIZE_SHIFT) & PM8XXX_PWM_SIZE_MASK; |
| 544 | |
| 545 | mask = PM8XXX_PWM_CLK_SEL_MASK | PM8XXX_PWM_PREDIVIDE_MASK | |
| 546 | PM8XXX_PWM_M_MASK | PM8XXX_PWM_SIZE_MASK; |
| 547 | pm8xxx_pwm_save(&pwm->pwm_ctl1, mask, val); |
| 548 | } |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | static void pm8xxx_pwm_save_pwm_value(struct pwm_device *pwm) |
| 552 | { |
| 553 | u8 mask, val; |
| 554 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 555 | if (pwm_chip->is_lpg_supported) { |
| 556 | val = (pwm->period.pwm_size > 6) ? (pwm->pwm_value >> 1) : 0; |
| 557 | pwm->pwm_lpg_ctl[3] = pwm->pwm_value; |
| 558 | mask = PM8XXX_PWM_VALUE_BIT8; |
| 559 | pm8xxx_pwm_save(&pwm->pwm_lpg_ctl[4], mask, val); |
| 560 | } else { |
| 561 | val = (pwm->period.pwm_size > 6) ? (pwm->pwm_value >> 8) : 0; |
| 562 | pwm->pwm_ctl2 = pwm->pwm_value; |
| 563 | mask = PM8XXX_PWM_VALUE_BIT0; |
| 564 | pm8xxx_pwm_save(&pwm->pwm_ctl1, mask, val); |
| 565 | } |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | static void pm8xxx_pwm_save_duty_time(struct pwm_device *pwm, |
| 569 | struct pm8xxx_pwm_lut *lut) |
| 570 | { |
| 571 | int i; |
| 572 | u8 mask, val; |
| 573 | |
| 574 | /* Linear search for duty time */ |
| 575 | for (i = 0; i < PM8XXX_PWM_1KHZ_COUNT_MAX; i++) { |
| 576 | if (duty_msec[i] >= lut->lut_duty_ms) |
| 577 | break; |
| 578 | } |
| 579 | val = i << PM8XXX_PWM_1KHZ_COUNT_SHIFT; |
| 580 | |
| 581 | mask = PM8XXX_PWM_1KHZ_COUNT_MASK; |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 582 | pm8xxx_pwm_save(&pwm->pwm_lpg_ctl[0], mask, val); |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | static void pm8xxx_pwm_save_pause(struct pwm_device *pwm, |
| 586 | struct pm8xxx_pwm_lut *lut) |
| 587 | { |
| 588 | int i, pause_cnt, time_cnt; |
| 589 | u8 mask, val; |
| 590 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 591 | time_cnt = (pwm->pwm_lpg_ctl[0] & PM8XXX_PWM_1KHZ_COUNT_MASK) |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 592 | >> PM8XXX_PWM_1KHZ_COUNT_SHIFT; |
| 593 | if (lut->flags & PM_PWM_LUT_PAUSE_HI_EN) { |
| 594 | pause_cnt = (lut->lut_pause_hi + duty_msec[time_cnt] / 2) |
| 595 | / duty_msec[time_cnt]; |
| 596 | /* Linear search for pause time */ |
| 597 | for (i = 0; i < PM8XXX_PWM_PAUSE_COUNT_MAX; i++) { |
| 598 | if (pause_count[i] >= pause_cnt) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 599 | break; |
| 600 | } |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 601 | val = (i << PM8XXX_PWM_PAUSE_COUNT_HI_SHIFT) & |
| 602 | PM8XXX_PWM_PAUSE_COUNT_HI_MASK; |
| 603 | val |= PM8XXX_PWM_PAUSE_ENABLE_HIGH; |
| 604 | } else { |
| 605 | val = 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 606 | } |
| 607 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 608 | mask = PM8XXX_PWM_PAUSE_COUNT_HI_MASK | PM8XXX_PWM_PAUSE_ENABLE_HIGH; |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 609 | pm8xxx_pwm_save(&pwm->pwm_lpg_ctl[5], mask, val); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 610 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 611 | if (lut->flags & PM_PWM_LUT_PAUSE_LO_EN) { |
| 612 | /* Linear search for pause time */ |
| 613 | pause_cnt = (lut->lut_pause_lo + duty_msec[time_cnt] / 2) |
| 614 | / duty_msec[time_cnt]; |
| 615 | for (i = 0; i < PM8XXX_PWM_PAUSE_COUNT_MAX; i++) { |
| 616 | if (pause_count[i] >= pause_cnt) |
| 617 | break; |
| 618 | } |
| 619 | val = (i << PM8XXX_PWM_PAUSE_COUNT_LO_SHIFT) & |
| 620 | PM8XXX_PWM_PAUSE_COUNT_LO_MASK; |
| 621 | val |= PM8XXX_PWM_PAUSE_ENABLE_LOW; |
| 622 | } else { |
| 623 | val = 0; |
| 624 | } |
| 625 | |
| 626 | mask = PM8XXX_PWM_PAUSE_COUNT_LO_MASK | PM8XXX_PWM_PAUSE_ENABLE_LOW; |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 627 | pm8xxx_pwm_save(&pwm->pwm_lpg_ctl[6], mask, val); |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 628 | } |
| 629 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 630 | static int pm8xxx_pwm_write(struct pwm_device *pwm) |
| 631 | { |
| 632 | int rc = 0; |
| 633 | |
| 634 | rc = pm8xxx_writeb(pwm->chip->dev->parent, |
| 635 | SSBI_REG_ADDR_PWM_CTL1(pwm->pwm_id), |
| 636 | pwm->pwm_ctl1); |
| 637 | if (rc) { |
| 638 | pr_err("pm8xxx_writeb() failed: rc=%d (PWM Ctl1[%d])\n", |
| 639 | rc, pwm->pwm_id); |
| 640 | return rc; |
| 641 | } |
| 642 | |
| 643 | rc = pm8xxx_writeb(pwm->chip->dev->parent, |
| 644 | SSBI_REG_ADDR_PWM_CTL2(pwm->pwm_id), |
| 645 | pwm->pwm_ctl2); |
| 646 | if (rc) { |
| 647 | pr_err("pm8xxx_writeb() failed: rc=%d (PWM Ctl2[%d])\n", |
| 648 | rc, pwm->pwm_id); |
| 649 | return rc; |
| 650 | } |
| 651 | |
| 652 | return rc; |
| 653 | } |
| 654 | |
| 655 | static int pm8xxx_lpg_pwm_write(struct pwm_device *pwm, int start, int end) |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 656 | { |
| 657 | int i, rc; |
| 658 | |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 659 | if (end == 7) { |
| 660 | rc = pm8xxx_writeb(pwm->chip->dev->parent, |
| 661 | SSBI_REG_ADDR_LPG_CTL_7, |
| 662 | pwm->pwm_lpg_ctl[end]); |
| 663 | if (rc) { |
| 664 | pr_err("pm8xxx_writeb(): rc=%d (PWM Ctl[7])\n", rc); |
| 665 | return rc; |
| 666 | } |
| 667 | } |
| 668 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 669 | /* Write in reverse way so 0 would be the last */ |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 670 | for (i = end - 2; i >= start; i--) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 671 | rc = pm8xxx_writeb(pwm->chip->dev->parent, |
| 672 | SSBI_REG_ADDR_LPG_CTL(i), |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 673 | pwm->pwm_lpg_ctl[i]); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 674 | if (rc) { |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 675 | pr_err("pm8xxx_writeb(): rc=%d (PWM Ctl[%d])\n", rc, i); |
| 676 | return rc; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 677 | } |
| 678 | } |
| 679 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 680 | return 0; |
| 681 | } |
| 682 | |
| 683 | static int pm8xxx_pwm_change_lut(struct pwm_device *pwm, |
| 684 | struct pm8xxx_pwm_lut *lut) |
| 685 | { |
| 686 | int rc; |
| 687 | |
| 688 | pm8xxx_pwm_save_index(pwm, lut->lut_lo_index, |
| 689 | lut->lut_hi_index, lut->flags); |
| 690 | pm8xxx_pwm_save_duty_time(pwm, lut); |
| 691 | pm8xxx_pwm_save_pause(pwm, lut); |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 692 | pm8xxx_pwm_save(&pwm->pwm_lpg_ctl[1], PM8XXX_PWM_BYPASS_LUT, 0); |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 693 | |
| 694 | pm8xxx_pwm_bank_sel(pwm); |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 695 | rc = pm8xxx_lpg_pwm_write(pwm, 0, 7); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 696 | |
| 697 | return rc; |
| 698 | } |
| 699 | |
Jay Chokshi | b0a0fa5 | 2012-02-23 16:18:44 -0800 | [diff] [blame] | 700 | static int pm8xxx_pwm_set_dtest(struct pwm_device *pwm, int enable) |
| 701 | { |
| 702 | int rc; |
| 703 | u8 reg; |
| 704 | |
| 705 | reg = pwm->pwm_id & PM8XXX_PWM_DTEST_BANK_MASK; |
| 706 | |
| 707 | if (enable) { |
| 708 | /* Observe LPG_OUT on DTEST1*/ |
| 709 | reg |= (1 << PM8XXX_PWM_DTEST_SHIFT) & |
| 710 | PM8XXX_PWM_DTEST_MASK; |
| 711 | } |
| 712 | |
| 713 | rc = pm8xxx_writeb(pwm->chip->dev->parent, |
| 714 | SSBI_REG_ADDR_LPG_TEST, reg); |
| 715 | if (rc) |
| 716 | pr_err("pm8xxx_write(DTEST=0x%x) failed: rc=%d\n", |
| 717 | reg, rc); |
| 718 | |
| 719 | return rc; |
| 720 | } |
| 721 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 722 | /* APIs */ |
| 723 | /** |
| 724 | * pwm_request - request a PWM device |
| 725 | * @pwm_id: PWM id or channel |
| 726 | * @label: the label to identify the user |
| 727 | */ |
| 728 | struct pwm_device *pwm_request(int pwm_id, const char *label) |
| 729 | { |
| 730 | struct pwm_device *pwm; |
| 731 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 732 | if (pwm_chip == NULL) { |
| 733 | pr_err("No pwm_chip\n"); |
| 734 | return ERR_PTR(-ENODEV); |
| 735 | } |
| 736 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 737 | if (pwm_id >= pwm_chip->pwm_channels || pwm_id < 0) { |
| 738 | pr_err("Invalid pwm_id: %d with %s\n", |
| 739 | pwm_id, label ? label : "."); |
| 740 | return ERR_PTR(-EINVAL); |
| 741 | } |
| 742 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 743 | mutex_lock(&pwm_chip->pwm_mutex); |
| 744 | pwm = &pwm_chip->pwm_dev[pwm_id]; |
| 745 | if (!pwm->in_use) { |
| 746 | pwm->in_use = 1; |
| 747 | pwm->label = label; |
| 748 | } else { |
| 749 | pwm = ERR_PTR(-EBUSY); |
| 750 | } |
| 751 | mutex_unlock(&pwm_chip->pwm_mutex); |
| 752 | |
| 753 | return pwm; |
| 754 | } |
| 755 | EXPORT_SYMBOL_GPL(pwm_request); |
| 756 | |
| 757 | /** |
| 758 | * pwm_free - free a PWM device |
| 759 | * @pwm: the PWM device |
| 760 | */ |
| 761 | void pwm_free(struct pwm_device *pwm) |
| 762 | { |
| 763 | if (pwm == NULL || IS_ERR(pwm) || pwm->chip == NULL) { |
| 764 | pr_err("Invalid pwm handle\n"); |
| 765 | return; |
| 766 | } |
| 767 | |
| 768 | mutex_lock(&pwm->chip->pwm_mutex); |
| 769 | if (pwm->in_use) { |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 770 | if (pwm_chip->is_lpg_supported) { |
| 771 | pm8xxx_pwm_bank_sel(pwm); |
| 772 | pm8xxx_pwm_start(pwm, 0, 0); |
| 773 | } else { |
| 774 | pm8xxx_pwm_disable(pwm); |
| 775 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 776 | pwm->in_use = 0; |
| 777 | pwm->label = NULL; |
| 778 | } |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 779 | if (pwm_chip->is_lpg_supported) |
| 780 | pm8xxx_pwm_bank_enable(pwm, 0); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 781 | mutex_unlock(&pwm->chip->pwm_mutex); |
| 782 | } |
| 783 | EXPORT_SYMBOL_GPL(pwm_free); |
| 784 | |
| 785 | /** |
| 786 | * pwm_config - change a PWM device configuration |
| 787 | * @pwm: the PWM device |
| 788 | * @period_us: period in microseconds |
| 789 | * @duty_us: duty cycle in microseconds |
| 790 | */ |
| 791 | int pwm_config(struct pwm_device *pwm, int duty_us, int period_us) |
| 792 | { |
Willie Ruan | 719c676 | 2011-08-25 11:03:14 -0700 | [diff] [blame] | 793 | struct pm8xxx_pwm_period *period; |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 794 | int rc = 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 795 | |
| 796 | if (pwm == NULL || IS_ERR(pwm) || |
| 797 | duty_us > period_us || |
| 798 | (unsigned)period_us > PM8XXX_PWM_PERIOD_MAX || |
| 799 | (unsigned)period_us < PM8XXX_PWM_PERIOD_MIN) { |
| 800 | pr_err("Invalid pwm handle or parameters\n"); |
| 801 | return -EINVAL; |
| 802 | } |
| 803 | if (pwm->chip == NULL) { |
| 804 | pr_err("No pwm_chip\n"); |
| 805 | return -ENODEV; |
| 806 | } |
| 807 | |
Willie Ruan | 719c676 | 2011-08-25 11:03:14 -0700 | [diff] [blame] | 808 | period = &pwm->period; |
| 809 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 810 | mutex_lock(&pwm->chip->pwm_mutex); |
| 811 | |
| 812 | if (!pwm->in_use) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 813 | rc = -EINVAL; |
| 814 | goto out_unlock; |
| 815 | } |
| 816 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 817 | if (pwm->pwm_period != period_us) { |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 818 | pm8xxx_pwm_calc_period(period_us, pwm); |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 819 | pm8xxx_pwm_save_period(pwm); |
| 820 | pwm->pwm_period = period_us; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 821 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 822 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 823 | pm8xxx_pwm_calc_pwm_value(pwm, period_us, duty_us); |
| 824 | pm8xxx_pwm_save_pwm_value(pwm); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 825 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 826 | if (pwm_chip->is_lpg_supported) { |
| 827 | pm8xxx_pwm_save(&pwm->pwm_lpg_ctl[1], |
| 828 | PM8XXX_PWM_BYPASS_LUT, PM8XXX_PWM_BYPASS_LUT); |
| 829 | |
| 830 | pm8xxx_pwm_bank_sel(pwm); |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 831 | rc = pm8xxx_lpg_pwm_write(pwm, 1, 7); |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 832 | } else { |
| 833 | rc = pm8xxx_pwm_write(pwm); |
| 834 | } |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 835 | |
| 836 | pr_debug("duty/period=%u/%u usec: pwm_value=%d (of %d)\n", |
| 837 | (unsigned)duty_us, (unsigned)period_us, |
| 838 | pwm->pwm_value, 1 << period->pwm_size); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 839 | |
| 840 | out_unlock: |
| 841 | mutex_unlock(&pwm->chip->pwm_mutex); |
| 842 | return rc; |
| 843 | } |
| 844 | EXPORT_SYMBOL_GPL(pwm_config); |
| 845 | |
| 846 | /** |
| 847 | * pwm_enable - start a PWM output toggling |
| 848 | * @pwm: the PWM device |
| 849 | */ |
| 850 | int pwm_enable(struct pwm_device *pwm) |
| 851 | { |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 852 | int rc = 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 853 | |
| 854 | if (pwm == NULL || IS_ERR(pwm)) { |
| 855 | pr_err("Invalid pwm handle\n"); |
| 856 | return -EINVAL; |
| 857 | } |
| 858 | if (pwm->chip == NULL) { |
| 859 | pr_err("No pwm_chip\n"); |
| 860 | return -ENODEV; |
| 861 | } |
| 862 | |
| 863 | mutex_lock(&pwm->chip->pwm_mutex); |
| 864 | if (!pwm->in_use) { |
| 865 | pr_err("pwm_id: %d: stale handle?\n", pwm->pwm_id); |
| 866 | rc = -EINVAL; |
| 867 | } else { |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 868 | if (pwm_chip->is_lpg_supported) { |
Jay Chokshi | b0a0fa5 | 2012-02-23 16:18:44 -0800 | [diff] [blame] | 869 | if (pwm->dtest_mode_supported) |
| 870 | pm8xxx_pwm_set_dtest(pwm, 1); |
Jay Chokshi | 9048522 | 2012-08-07 20:22:39 -0700 | [diff] [blame] | 871 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 872 | pm8xxx_pwm_bank_sel(pwm); |
Jay Chokshi | f3db97a | 2012-08-08 19:32:15 -0700 | [diff] [blame] | 873 | rc = pm8xxx_pwm_bank_enable(pwm, 1); |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 874 | pm8xxx_pwm_start(pwm, 1, 0); |
Jay Chokshi | 9048522 | 2012-08-07 20:22:39 -0700 | [diff] [blame] | 875 | |
| 876 | /* In PM8038, due to hardware bug, PWM_VALUE register |
| 877 | * needs to be written one more time after enabling |
| 878 | * PWM mode. |
| 879 | */ |
| 880 | if (pwm->chip->is_pwm_enable_sync_workaround_needed) |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 881 | rc = pm8xxx_lpg_pwm_write(pwm, 3, 5); |
Jay Chokshi | 9048522 | 2012-08-07 20:22:39 -0700 | [diff] [blame] | 882 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 883 | } else { |
| 884 | pm8xxx_pwm_enable(pwm); |
| 885 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 886 | } |
| 887 | mutex_unlock(&pwm->chip->pwm_mutex); |
| 888 | return rc; |
| 889 | } |
| 890 | EXPORT_SYMBOL_GPL(pwm_enable); |
| 891 | |
| 892 | /** |
| 893 | * pwm_disable - stop a PWM output toggling |
| 894 | * @pwm: the PWM device |
| 895 | */ |
| 896 | void pwm_disable(struct pwm_device *pwm) |
| 897 | { |
| 898 | if (pwm == NULL || IS_ERR(pwm) || pwm->chip == NULL) { |
| 899 | pr_err("Invalid pwm handle or no pwm_chip\n"); |
| 900 | return; |
| 901 | } |
| 902 | |
| 903 | mutex_lock(&pwm->chip->pwm_mutex); |
| 904 | if (pwm->in_use) { |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 905 | if (pwm_chip->is_lpg_supported) { |
Jay Chokshi | b0a0fa5 | 2012-02-23 16:18:44 -0800 | [diff] [blame] | 906 | if (pwm->dtest_mode_supported) |
| 907 | pm8xxx_pwm_set_dtest(pwm, 0); |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 908 | pm8xxx_pwm_bank_sel(pwm); |
| 909 | pm8xxx_pwm_start(pwm, 0, 0); |
| 910 | pm8xxx_pwm_bank_enable(pwm, 0); |
| 911 | } else { |
| 912 | pm8xxx_pwm_disable(pwm); |
| 913 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 914 | } |
| 915 | mutex_unlock(&pwm->chip->pwm_mutex); |
| 916 | } |
| 917 | EXPORT_SYMBOL_GPL(pwm_disable); |
| 918 | |
| 919 | /** |
Jay Chokshi | 4acbdd5 | 2011-09-16 17:09:44 -0700 | [diff] [blame] | 920 | * pm8xxx_pwm_config_period - change PWM period |
| 921 | * |
| 922 | * @pwm: the PWM device |
| 923 | * @pwm_p: period in struct pm8xxx_pwm_period |
| 924 | */ |
| 925 | int pm8xxx_pwm_config_period(struct pwm_device *pwm, |
| 926 | struct pm8xxx_pwm_period *period) |
| 927 | { |
| 928 | int rc; |
| 929 | |
| 930 | if (pwm == NULL || IS_ERR(pwm) || period == NULL) |
| 931 | return -EINVAL; |
| 932 | if (pwm->chip == NULL) |
| 933 | return -ENODEV; |
| 934 | |
| 935 | mutex_lock(&pwm->chip->pwm_mutex); |
| 936 | |
| 937 | if (!pwm->in_use) { |
| 938 | rc = -EINVAL; |
| 939 | goto out_unlock; |
| 940 | } |
| 941 | |
| 942 | pwm->period.pwm_size = period->pwm_size; |
| 943 | pwm->period.clk = period->clk; |
| 944 | pwm->period.pre_div = period->pre_div; |
| 945 | pwm->period.pre_div_exp = period->pre_div_exp; |
| 946 | |
| 947 | pm8xxx_pwm_save_period(pwm); |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 948 | |
| 949 | if (pwm_chip->is_lpg_supported) { |
| 950 | pm8xxx_pwm_bank_sel(pwm); |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 951 | rc = pm8xxx_lpg_pwm_write(pwm, 4, 7); |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 952 | } else { |
| 953 | rc = pm8xxx_pwm_write(pwm); |
| 954 | } |
| 955 | |
Jay Chokshi | 4acbdd5 | 2011-09-16 17:09:44 -0700 | [diff] [blame] | 956 | |
| 957 | out_unlock: |
| 958 | mutex_unlock(&pwm->chip->pwm_mutex); |
| 959 | return rc; |
| 960 | } |
| 961 | EXPORT_SYMBOL(pm8xxx_pwm_config_period); |
| 962 | |
| 963 | /** |
| 964 | * pm8xxx_pwm_config_pwm_value - change a PWM device configuration |
| 965 | * @pwm: the PWM device |
| 966 | * @pwm_value: the duty cycle in raw PWM value (< 2^pwm_size) |
| 967 | */ |
| 968 | int pm8xxx_pwm_config_pwm_value(struct pwm_device *pwm, int pwm_value) |
| 969 | { |
| 970 | int rc = 0; |
| 971 | |
| 972 | if (pwm == NULL || IS_ERR(pwm)) |
| 973 | return -EINVAL; |
| 974 | if (pwm->chip == NULL) |
| 975 | return -ENODEV; |
| 976 | |
| 977 | mutex_lock(&pwm->chip->pwm_mutex); |
| 978 | |
| 979 | if (!pwm->in_use || !pwm->pwm_period) { |
| 980 | rc = -EINVAL; |
| 981 | goto out_unlock; |
| 982 | } |
| 983 | |
| 984 | if (pwm->pwm_value == pwm_value) |
| 985 | goto out_unlock; |
| 986 | |
| 987 | pwm->pwm_value = pwm_value; |
| 988 | |
| 989 | pm8xxx_pwm_save_pwm_value(pwm); |
Jay Chokshi | 4acbdd5 | 2011-09-16 17:09:44 -0700 | [diff] [blame] | 990 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 991 | if (pwm_chip->is_lpg_supported) { |
| 992 | pm8xxx_pwm_save(&pwm->pwm_lpg_ctl[1], |
| 993 | PM8XXX_PWM_BYPASS_LUT, PM8XXX_PWM_BYPASS_LUT); |
| 994 | pm8xxx_pwm_bank_sel(pwm); |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 995 | rc = pm8xxx_lpg_pwm_write(pwm, 1, 7); |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 996 | } else { |
| 997 | rc = pm8xxx_pwm_write(pwm); |
| 998 | } |
Jay Chokshi | 4acbdd5 | 2011-09-16 17:09:44 -0700 | [diff] [blame] | 999 | |
| 1000 | if (rc) |
| 1001 | pr_err("[%d]: pm8xxx_pwm_write: rc=%d\n", pwm->pwm_id, rc); |
| 1002 | |
| 1003 | out_unlock: |
| 1004 | mutex_unlock(&pwm->chip->pwm_mutex); |
| 1005 | return rc; |
| 1006 | } |
| 1007 | EXPORT_SYMBOL_GPL(pm8xxx_pwm_config_pwm_value); |
| 1008 | |
| 1009 | /** |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1010 | * pm8xxx_pwm_lut_config - change a PWM device configuration to use LUT |
| 1011 | * @pwm: the PWM device |
| 1012 | * @period_us: period in microseconds |
| 1013 | * @duty_pct: arrary of duty cycles in percent, like 20, 50. |
| 1014 | * @duty_time_ms: time for each duty cycle in milliseconds |
| 1015 | * @start_idx: start index in lookup table from 0 to MAX-1 |
| 1016 | * @idx_len: number of index |
| 1017 | * @pause_lo: pause time in milliseconds at low index |
| 1018 | * @pause_hi: pause time in milliseconds at high index |
| 1019 | * @flags: control flags |
| 1020 | */ |
| 1021 | int pm8xxx_pwm_lut_config(struct pwm_device *pwm, int period_us, |
| 1022 | int duty_pct[], int duty_time_ms, int start_idx, |
| 1023 | int idx_len, int pause_lo, int pause_hi, int flags) |
| 1024 | { |
Willie Ruan | 719c676 | 2011-08-25 11:03:14 -0700 | [diff] [blame] | 1025 | struct pm8xxx_pwm_lut lut; |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 1026 | int len; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1027 | int rc; |
| 1028 | |
| 1029 | if (pwm == NULL || IS_ERR(pwm) || !idx_len) { |
| 1030 | pr_err("Invalid pwm handle or idx_len=0\n"); |
| 1031 | return -EINVAL; |
| 1032 | } |
| 1033 | if (duty_pct == NULL && !(flags & PM_PWM_LUT_NO_TABLE)) { |
| 1034 | pr_err("Invalid duty_pct with flag\n"); |
| 1035 | return -EINVAL; |
| 1036 | } |
| 1037 | if (pwm->chip == NULL) { |
| 1038 | pr_err("No pwm_chip\n"); |
| 1039 | return -ENODEV; |
| 1040 | } |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1041 | |
| 1042 | if (pwm->chip->is_lpg_supported == 0) { |
| 1043 | pr_err("LPG module isn't supported\n"); |
| 1044 | return -EINVAL; |
| 1045 | } |
| 1046 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1047 | if (idx_len >= PM_PWM_LUT_SIZE && start_idx) { |
| 1048 | pr_err("Wrong LUT size or index\n"); |
| 1049 | return -EINVAL; |
| 1050 | } |
| 1051 | if ((start_idx + idx_len) > PM_PWM_LUT_SIZE) { |
| 1052 | pr_err("Exceed LUT limit\n"); |
| 1053 | return -EINVAL; |
| 1054 | } |
| 1055 | if ((unsigned)period_us > PM8XXX_PWM_PERIOD_MAX || |
| 1056 | (unsigned)period_us < PM8XXX_PWM_PERIOD_MIN) { |
| 1057 | pr_err("Period out of range\n"); |
| 1058 | return -EINVAL; |
| 1059 | } |
| 1060 | |
| 1061 | mutex_lock(&pwm->chip->pwm_mutex); |
| 1062 | |
Prasad Sodagudi | 5af8792 | 2013-06-05 17:33:52 +0530 | [diff] [blame] | 1063 | if (flags & PM_PWM_BANK_HI) |
| 1064 | pwm->banks = PM_PWM_BANK_HI; |
| 1065 | |
| 1066 | if (flags & PM_PWM_BANK_LO) |
| 1067 | pwm->banks |= PM_PWM_BANK_LO; |
| 1068 | |
| 1069 | /*Enable both banks if banks information is not shared.*/ |
| 1070 | if (!pwm->banks) |
| 1071 | pwm->banks |= (PM_PWM_BANK_LO | PM_PWM_BANK_HI); |
| 1072 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1073 | if (!pwm->in_use) { |
| 1074 | pr_err("pwm_id: %d: stale handle?\n", pwm->pwm_id); |
| 1075 | rc = -EINVAL; |
| 1076 | goto out_unlock; |
| 1077 | } |
| 1078 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 1079 | if (pwm->pwm_period != period_us) { |
Prasad Sodagudi | defd642 | 2013-06-24 22:23:29 +0530 | [diff] [blame] | 1080 | pm8xxx_pwm_calc_period(period_us, pwm); |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 1081 | pm8xxx_pwm_save_period(pwm); |
| 1082 | pwm->pwm_period = period_us; |
| 1083 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1084 | |
| 1085 | len = (idx_len > PM_PWM_LUT_SIZE) ? PM_PWM_LUT_SIZE : idx_len; |
| 1086 | |
| 1087 | if (flags & PM_PWM_LUT_NO_TABLE) |
| 1088 | goto after_table_write; |
| 1089 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 1090 | rc = pm8xxx_pwm_change_table(pwm, duty_pct, start_idx, len, 0); |
| 1091 | if (rc) { |
| 1092 | pr_err("pm8xxx_pwm_change_table: rc=%d\n", rc); |
| 1093 | goto out_unlock; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1094 | } |
| 1095 | |
| 1096 | after_table_write: |
Willie Ruan | 719c676 | 2011-08-25 11:03:14 -0700 | [diff] [blame] | 1097 | lut.lut_duty_ms = duty_time_ms; |
| 1098 | lut.lut_lo_index = start_idx; |
| 1099 | lut.lut_hi_index = start_idx + len - 1; |
| 1100 | lut.lut_pause_lo = pause_lo; |
| 1101 | lut.lut_pause_hi = pause_hi; |
| 1102 | lut.flags = flags; |
| 1103 | pwm->bypass_lut = 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1104 | |
Willie Ruan | 8de2f38 | 2011-08-25 11:04:50 -0700 | [diff] [blame] | 1105 | rc = pm8xxx_pwm_change_lut(pwm, &lut); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1106 | |
| 1107 | out_unlock: |
| 1108 | mutex_unlock(&pwm->chip->pwm_mutex); |
| 1109 | return rc; |
| 1110 | } |
| 1111 | EXPORT_SYMBOL_GPL(pm8xxx_pwm_lut_config); |
| 1112 | |
| 1113 | /** |
| 1114 | * pm8xxx_pwm_lut_enable - control a PWM device to start/stop LUT ramp |
| 1115 | * @pwm: the PWM device |
| 1116 | * @start: to start (1), or stop (0) |
| 1117 | */ |
| 1118 | int pm8xxx_pwm_lut_enable(struct pwm_device *pwm, int start) |
| 1119 | { |
| 1120 | if (pwm == NULL || IS_ERR(pwm)) { |
| 1121 | pr_err("Invalid pwm handle\n"); |
| 1122 | return -EINVAL; |
| 1123 | } |
| 1124 | if (pwm->chip == NULL) { |
| 1125 | pr_err("No pwm_chip\n"); |
| 1126 | return -ENODEV; |
| 1127 | } |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1128 | if (pwm->chip->is_lpg_supported == 0) { |
| 1129 | pr_err("LPG module isn't supported\n"); |
| 1130 | return -EINVAL; |
| 1131 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1132 | |
| 1133 | mutex_lock(&pwm->chip->pwm_mutex); |
| 1134 | if (start) { |
Jay Chokshi | b0a0fa5 | 2012-02-23 16:18:44 -0800 | [diff] [blame] | 1135 | if (pwm->dtest_mode_supported) |
| 1136 | pm8xxx_pwm_set_dtest(pwm, 1); |
| 1137 | |
Jay Chokshi | f3db97a | 2012-08-08 19:32:15 -0700 | [diff] [blame] | 1138 | pm8xxx_pwm_bank_sel(pwm); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1139 | pm8xxx_pwm_bank_enable(pwm, 1); |
| 1140 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1141 | pm8xxx_pwm_start(pwm, 1, 1); |
| 1142 | } else { |
Jay Chokshi | b0a0fa5 | 2012-02-23 16:18:44 -0800 | [diff] [blame] | 1143 | if (pwm->dtest_mode_supported) |
| 1144 | pm8xxx_pwm_set_dtest(pwm, 0); |
| 1145 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1146 | pm8xxx_pwm_bank_sel(pwm); |
| 1147 | pm8xxx_pwm_start(pwm, 0, 0); |
| 1148 | |
| 1149 | pm8xxx_pwm_bank_enable(pwm, 0); |
| 1150 | } |
| 1151 | mutex_unlock(&pwm->chip->pwm_mutex); |
| 1152 | return 0; |
| 1153 | } |
| 1154 | EXPORT_SYMBOL_GPL(pm8xxx_pwm_lut_enable); |
| 1155 | |
| 1156 | #if defined(CONFIG_DEBUG_FS) |
| 1157 | |
| 1158 | struct pm8xxx_pwm_dbg_device; |
| 1159 | |
| 1160 | struct pm8xxx_pwm_user { |
| 1161 | int pwm_id; |
| 1162 | struct pwm_device *pwm; |
| 1163 | int period; |
| 1164 | int duty_cycle; |
| 1165 | int enable; |
| 1166 | struct pm8xxx_pwm_dbg_device *dbgdev; |
| 1167 | }; |
| 1168 | |
| 1169 | struct pm8xxx_pwm_dbg_device { |
| 1170 | struct mutex dbg_mutex; |
| 1171 | struct device *dev; |
| 1172 | struct dentry *dent; |
| 1173 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1174 | struct pm8xxx_pwm_user *user; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1175 | }; |
| 1176 | |
| 1177 | static struct pm8xxx_pwm_dbg_device *pmic_dbg_device; |
| 1178 | |
| 1179 | static int dbg_pwm_check_period(int period) |
| 1180 | { |
| 1181 | if (period < PM8XXX_PWM_PERIOD_MIN || period > PM8XXX_PWM_PERIOD_MAX) { |
| 1182 | pr_err("period is invalid: %d\n", period); |
| 1183 | return -EINVAL; |
| 1184 | } |
| 1185 | return 0; |
| 1186 | } |
| 1187 | |
| 1188 | static int dbg_pwm_check_duty_cycle(int duty_cycle, const char *func_name) |
| 1189 | { |
| 1190 | if (duty_cycle <= 0 || duty_cycle > 100) { |
| 1191 | pr_err("%s: duty_cycle is invalid: %d\n", |
| 1192 | func_name, duty_cycle); |
| 1193 | return -EINVAL; |
| 1194 | } |
| 1195 | return 0; |
| 1196 | } |
| 1197 | |
| 1198 | static void dbg_pwm_check_handle(struct pm8xxx_pwm_user *puser) |
| 1199 | { |
| 1200 | struct pwm_device *tmp; |
| 1201 | |
| 1202 | if (puser->pwm == NULL) { |
| 1203 | tmp = pwm_request(puser->pwm_id, "pwm-dbg"); |
| 1204 | if (PTR_ERR(puser->pwm)) { |
| 1205 | pr_err("pwm_request: err=%ld\n", PTR_ERR(puser->pwm)); |
| 1206 | puser->pwm = NULL; |
Willie Ruan | 10976ea | 2011-08-25 11:01:15 -0700 | [diff] [blame] | 1207 | } else { |
| 1208 | pr_debug("[id=%d] pwm_request ok\n", puser->pwm_id); |
| 1209 | puser->pwm = tmp; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1210 | } |
| 1211 | } |
| 1212 | } |
| 1213 | |
| 1214 | static int dbg_pwm_enable_set(void *data, u64 val) |
| 1215 | { |
| 1216 | struct pm8xxx_pwm_user *puser = data; |
| 1217 | struct pm8xxx_pwm_dbg_device *dbgdev = puser->dbgdev; |
| 1218 | int rc; |
| 1219 | |
| 1220 | mutex_lock(&dbgdev->dbg_mutex); |
| 1221 | rc = dbg_pwm_check_duty_cycle(puser->duty_cycle, __func__); |
| 1222 | if (!rc) { |
| 1223 | puser->enable = val; |
| 1224 | dbg_pwm_check_handle(puser); |
| 1225 | if (puser->pwm) { |
| 1226 | if (puser->enable) |
| 1227 | pwm_enable(puser->pwm); |
| 1228 | else |
| 1229 | pwm_disable(puser->pwm); |
| 1230 | } |
| 1231 | } |
| 1232 | mutex_unlock(&dbgdev->dbg_mutex); |
| 1233 | return 0; |
| 1234 | } |
| 1235 | |
| 1236 | static int dbg_pwm_enable_get(void *data, u64 *val) |
| 1237 | { |
| 1238 | struct pm8xxx_pwm_user *puser = data; |
| 1239 | struct pm8xxx_pwm_dbg_device *dbgdev = puser->dbgdev; |
| 1240 | |
| 1241 | mutex_lock(&dbgdev->dbg_mutex); |
| 1242 | *val = puser->enable; |
| 1243 | mutex_unlock(&dbgdev->dbg_mutex); |
| 1244 | return 0; |
| 1245 | } |
| 1246 | |
| 1247 | DEFINE_SIMPLE_ATTRIBUTE(dbg_pwm_enable_fops, |
| 1248 | dbg_pwm_enable_get, dbg_pwm_enable_set, |
| 1249 | "%lld\n"); |
| 1250 | |
| 1251 | static int dbg_pwm_duty_cycle_set(void *data, u64 val) |
| 1252 | { |
| 1253 | struct pm8xxx_pwm_user *puser = data; |
| 1254 | struct pm8xxx_pwm_dbg_device *dbgdev = puser->dbgdev; |
| 1255 | int rc; |
| 1256 | |
| 1257 | mutex_lock(&dbgdev->dbg_mutex); |
| 1258 | rc = dbg_pwm_check_duty_cycle(val, __func__); |
| 1259 | if (!rc) { |
| 1260 | puser->duty_cycle = val; |
| 1261 | dbg_pwm_check_handle(puser); |
| 1262 | if (puser->pwm) { |
| 1263 | int duty_us; |
| 1264 | |
Willie Ruan | 10976ea | 2011-08-25 11:01:15 -0700 | [diff] [blame] | 1265 | duty_us = puser->duty_cycle * puser->period / 100; |
| 1266 | pwm_config(puser->pwm, duty_us, puser->period); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1267 | } |
| 1268 | } |
| 1269 | mutex_unlock(&dbgdev->dbg_mutex); |
| 1270 | return 0; |
| 1271 | } |
| 1272 | |
| 1273 | static int dbg_pwm_duty_cycle_get(void *data, u64 *val) |
| 1274 | { |
| 1275 | struct pm8xxx_pwm_user *puser = data; |
| 1276 | struct pm8xxx_pwm_dbg_device *dbgdev = puser->dbgdev; |
| 1277 | |
| 1278 | mutex_lock(&dbgdev->dbg_mutex); |
| 1279 | *val = puser->duty_cycle; |
| 1280 | mutex_unlock(&dbgdev->dbg_mutex); |
| 1281 | return 0; |
| 1282 | } |
| 1283 | |
| 1284 | DEFINE_SIMPLE_ATTRIBUTE(dbg_pwm_duty_cycle_fops, |
| 1285 | dbg_pwm_duty_cycle_get, dbg_pwm_duty_cycle_set, |
| 1286 | "%lld\n"); |
| 1287 | |
| 1288 | static int dbg_pwm_period_set(void *data, u64 val) |
| 1289 | { |
| 1290 | struct pm8xxx_pwm_user *puser = data; |
| 1291 | struct pm8xxx_pwm_dbg_device *dbgdev = puser->dbgdev; |
| 1292 | int rc; |
| 1293 | |
| 1294 | mutex_lock(&dbgdev->dbg_mutex); |
| 1295 | rc = dbg_pwm_check_period(val); |
| 1296 | if (!rc) |
| 1297 | puser->period = val; |
| 1298 | mutex_unlock(&dbgdev->dbg_mutex); |
| 1299 | return 0; |
| 1300 | } |
| 1301 | |
| 1302 | static int dbg_pwm_period_get(void *data, u64 *val) |
| 1303 | { |
| 1304 | struct pm8xxx_pwm_user *puser = data; |
| 1305 | struct pm8xxx_pwm_dbg_device *dbgdev = puser->dbgdev; |
| 1306 | |
| 1307 | mutex_lock(&dbgdev->dbg_mutex); |
| 1308 | *val = puser->period; |
| 1309 | mutex_unlock(&dbgdev->dbg_mutex); |
| 1310 | return 0; |
| 1311 | } |
| 1312 | |
| 1313 | DEFINE_SIMPLE_ATTRIBUTE(dbg_pwm_period_fops, |
| 1314 | dbg_pwm_period_get, dbg_pwm_period_set, "%lld\n"); |
| 1315 | |
| 1316 | static int __devinit pm8xxx_pwm_dbg_probe(struct device *dev) |
| 1317 | { |
| 1318 | struct pm8xxx_pwm_dbg_device *dbgdev; |
| 1319 | struct dentry *dent; |
| 1320 | struct dentry *temp; |
| 1321 | struct pm8xxx_pwm_user *puser; |
| 1322 | int i; |
Jay Chokshi | 00c07cc | 2011-10-27 15:50:03 -0700 | [diff] [blame] | 1323 | int rc = 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1324 | |
| 1325 | if (dev == NULL) { |
| 1326 | pr_err("no parent data passed in.\n"); |
| 1327 | return -EINVAL; |
| 1328 | } |
| 1329 | |
| 1330 | dbgdev = kzalloc(sizeof *dbgdev, GFP_KERNEL); |
| 1331 | if (dbgdev == NULL) { |
| 1332 | pr_err("kzalloc() failed.\n"); |
| 1333 | return -ENOMEM; |
| 1334 | } |
| 1335 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1336 | dbgdev->user = kcalloc(pwm_chip->pwm_channels, |
| 1337 | sizeof(struct pm8xxx_pwm_user), GFP_KERNEL); |
| 1338 | if (dbgdev->user == NULL) { |
| 1339 | pr_err("kcalloc() failed.\n"); |
Jay Chokshi | 00c07cc | 2011-10-27 15:50:03 -0700 | [diff] [blame] | 1340 | rc = -ENOMEM; |
| 1341 | goto user_error; |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1342 | } |
| 1343 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1344 | mutex_init(&dbgdev->dbg_mutex); |
| 1345 | |
| 1346 | dbgdev->dev = dev; |
| 1347 | |
| 1348 | dent = debugfs_create_dir("pm8xxx-pwm-dbg", NULL); |
| 1349 | if (dent == NULL || IS_ERR(dent)) { |
| 1350 | pr_err("ERR debugfs_create_dir: dent=%p\n", dent); |
Jay Chokshi | 00c07cc | 2011-10-27 15:50:03 -0700 | [diff] [blame] | 1351 | rc = -ENOMEM; |
| 1352 | goto dir_error; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1353 | } |
| 1354 | |
| 1355 | dbgdev->dent = dent; |
| 1356 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1357 | for (i = 0; i < pwm_chip->pwm_channels; i++) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1358 | char pwm_ch[] = "0"; |
| 1359 | |
| 1360 | pwm_ch[0] = '0' + i; |
| 1361 | dent = debugfs_create_dir(pwm_ch, dbgdev->dent); |
| 1362 | if (dent == NULL || IS_ERR(dent)) { |
| 1363 | pr_err("ERR: pwm=%d: dir: dent=%p\n", i, dent); |
Jay Chokshi | 00c07cc | 2011-10-27 15:50:03 -0700 | [diff] [blame] | 1364 | rc = -ENOMEM; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1365 | goto debug_error; |
| 1366 | } |
| 1367 | |
| 1368 | puser = &dbgdev->user[i]; |
| 1369 | puser->dbgdev = dbgdev; |
| 1370 | puser->pwm_id = i; |
| 1371 | temp = debugfs_create_file("period", S_IRUGO | S_IWUSR, |
| 1372 | dent, puser, &dbg_pwm_period_fops); |
| 1373 | if (temp == NULL || IS_ERR(temp)) { |
| 1374 | pr_err("ERR: pwm=%d: period: dent=%p\n", i, dent); |
Jay Chokshi | 00c07cc | 2011-10-27 15:50:03 -0700 | [diff] [blame] | 1375 | rc = -ENOMEM; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1376 | goto debug_error; |
| 1377 | } |
| 1378 | |
| 1379 | temp = debugfs_create_file("duty-cycle", S_IRUGO | S_IWUSR, |
| 1380 | dent, puser, &dbg_pwm_duty_cycle_fops); |
| 1381 | if (temp == NULL || IS_ERR(temp)) { |
| 1382 | pr_err("ERR: pwm=%d: duty-cycle: dent=%p\n", i, dent); |
Jay Chokshi | 00c07cc | 2011-10-27 15:50:03 -0700 | [diff] [blame] | 1383 | rc = -ENOMEM; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1384 | goto debug_error; |
| 1385 | } |
| 1386 | |
| 1387 | temp = debugfs_create_file("enable", S_IRUGO | S_IWUSR, |
| 1388 | dent, puser, &dbg_pwm_enable_fops); |
| 1389 | if (temp == NULL || IS_ERR(temp)) { |
| 1390 | pr_err("ERR: pwm=%d: enable: dent=%p\n", i, dent); |
Jay Chokshi | 00c07cc | 2011-10-27 15:50:03 -0700 | [diff] [blame] | 1391 | rc = -ENOMEM; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1392 | goto debug_error; |
| 1393 | } |
| 1394 | } |
| 1395 | |
| 1396 | pmic_dbg_device = dbgdev; |
| 1397 | |
| 1398 | return 0; |
| 1399 | |
| 1400 | debug_error: |
| 1401 | debugfs_remove_recursive(dbgdev->dent); |
Jay Chokshi | 00c07cc | 2011-10-27 15:50:03 -0700 | [diff] [blame] | 1402 | dir_error: |
| 1403 | kfree(dbgdev->user); |
| 1404 | user_error: |
| 1405 | kfree(dbgdev); |
| 1406 | return rc; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1407 | } |
| 1408 | |
| 1409 | static int __devexit pm8xxx_pwm_dbg_remove(void) |
| 1410 | { |
| 1411 | if (pmic_dbg_device) { |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1412 | kfree(pmic_dbg_device->user); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1413 | debugfs_remove_recursive(pmic_dbg_device->dent); |
| 1414 | kfree(pmic_dbg_device); |
| 1415 | } |
| 1416 | return 0; |
| 1417 | } |
| 1418 | |
| 1419 | #else |
| 1420 | |
| 1421 | static int __devinit pm8xxx_pwm_dbg_probe(struct device *dev) |
| 1422 | { |
| 1423 | return 0; |
| 1424 | } |
| 1425 | |
| 1426 | static int __devexit pm8xxx_pwm_dbg_remove(void) |
| 1427 | { |
| 1428 | return 0; |
| 1429 | } |
| 1430 | |
| 1431 | #endif |
| 1432 | |
| 1433 | static int __devinit pm8xxx_pwm_probe(struct platform_device *pdev) |
| 1434 | { |
Jay Chokshi | b0a0fa5 | 2012-02-23 16:18:44 -0800 | [diff] [blame] | 1435 | const struct pm8xxx_pwm_platform_data *pdata = pdev->dev.platform_data; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1436 | struct pm8xxx_pwm_chip *chip; |
Jay Chokshi | d9e4bc2 | 2012-03-02 15:13:44 -0800 | [diff] [blame] | 1437 | int i, dtest_channel; |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1438 | enum pm8xxx_version version; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1439 | |
| 1440 | chip = kzalloc(sizeof *chip, GFP_KERNEL); |
| 1441 | if (chip == NULL) { |
| 1442 | pr_err("kzalloc() failed.\n"); |
| 1443 | return -ENOMEM; |
| 1444 | } |
| 1445 | |
Jay Chokshi | d9e4bc2 | 2012-03-02 15:13:44 -0800 | [diff] [blame] | 1446 | if (pdata != NULL) |
| 1447 | dtest_channel = pdata->dtest_channel; |
| 1448 | else |
| 1449 | dtest_channel = -1; |
| 1450 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1451 | mutex_init(&chip->pwm_mutex); |
| 1452 | |
| 1453 | chip->dev = &pdev->dev; |
| 1454 | pwm_chip = chip; |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1455 | |
| 1456 | version = pm8xxx_get_version(chip->dev->parent); |
| 1457 | |
| 1458 | if (version == PM8XXX_VERSION_8921 || |
David Collins | 999480d | 2011-11-16 08:52:30 -0800 | [diff] [blame] | 1459 | version == PM8XXX_VERSION_8058 || |
Jay Chokshi | 0c220cd | 2011-12-09 17:18:20 -0800 | [diff] [blame] | 1460 | version == PM8XXX_VERSION_8922 || |
| 1461 | version == PM8XXX_VERSION_8038) { |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1462 | chip->is_lpg_supported = 1; |
| 1463 | } |
Jay Chokshi | 9048522 | 2012-08-07 20:22:39 -0700 | [diff] [blame] | 1464 | |
| 1465 | if (version == PM8XXX_VERSION_8038) |
| 1466 | chip->is_pwm_enable_sync_workaround_needed = 1; |
| 1467 | else |
| 1468 | chip->is_pwm_enable_sync_workaround_needed = 0; |
| 1469 | |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1470 | if (chip->is_lpg_supported) { |
Jay Chokshi | 0c220cd | 2011-12-09 17:18:20 -0800 | [diff] [blame] | 1471 | if (version == PM8XXX_VERSION_8922 || |
| 1472 | version == PM8XXX_VERSION_8038) { |
| 1473 | for (i = 0; i < NUM_CLOCKS; i++) |
| 1474 | pt_t[0][i] /= PRE_DIVIDE_2; |
| 1475 | chip->pwm_channels = PM8XXX_LPG_V1_PWM_CHANNELS; |
| 1476 | } else { |
| 1477 | chip->pwm_channels = PM8XXX_LPG_V0_PWM_CHANNELS; |
| 1478 | } |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1479 | chip->pwm_total_pre_divs = NUM_LPG_PRE_DIVIDE; |
| 1480 | } else { |
| 1481 | chip->pwm_channels = PM8XXX_PWM_CHANNELS; |
| 1482 | chip->pwm_total_pre_divs = NUM_PWM_PRE_DIVIDE; |
| 1483 | } |
| 1484 | |
| 1485 | chip->pwm_dev = kcalloc(chip->pwm_channels, sizeof(struct pwm_device), |
| 1486 | GFP_KERNEL); |
| 1487 | if (chip->pwm_dev == NULL) { |
| 1488 | pr_err("kcalloc() failed.\n"); |
| 1489 | mutex_destroy(&chip->pwm_mutex); |
| 1490 | kfree(chip); |
| 1491 | return -ENOMEM; |
| 1492 | } |
| 1493 | |
| 1494 | for (i = 0; i < chip->pwm_channels; i++) { |
| 1495 | chip->pwm_dev[i].pwm_id = i; |
| 1496 | chip->pwm_dev[i].chip = chip; |
Jay Chokshi | d9e4bc2 | 2012-03-02 15:13:44 -0800 | [diff] [blame] | 1497 | if (i == dtest_channel) |
Jay Chokshi | b0a0fa5 | 2012-02-23 16:18:44 -0800 | [diff] [blame] | 1498 | chip->pwm_dev[i].dtest_mode_supported = 1; |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1499 | } |
| 1500 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1501 | platform_set_drvdata(pdev, chip); |
| 1502 | |
| 1503 | if (pm8xxx_pwm_dbg_probe(&pdev->dev) < 0) |
| 1504 | pr_err("could not set up debugfs\n"); |
| 1505 | |
| 1506 | pr_notice("OK\n"); |
| 1507 | return 0; |
| 1508 | } |
| 1509 | |
| 1510 | static int __devexit pm8xxx_pwm_remove(struct platform_device *pdev) |
| 1511 | { |
| 1512 | struct pm8xxx_pwm_chip *chip = dev_get_drvdata(pdev->dev.parent); |
| 1513 | |
| 1514 | pm8xxx_pwm_dbg_remove(); |
Jay Chokshi | 5765686 | 2011-09-07 12:02:22 -0700 | [diff] [blame] | 1515 | kfree(chip->pwm_dev); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1516 | mutex_destroy(&chip->pwm_mutex); |
| 1517 | platform_set_drvdata(pdev, NULL); |
| 1518 | kfree(chip); |
| 1519 | return 0; |
| 1520 | } |
| 1521 | |
| 1522 | static struct platform_driver pm8xxx_pwm_driver = { |
| 1523 | .probe = pm8xxx_pwm_probe, |
| 1524 | .remove = __devexit_p(pm8xxx_pwm_remove), |
| 1525 | .driver = { |
| 1526 | .name = PM8XXX_PWM_DEV_NAME, |
| 1527 | .owner = THIS_MODULE, |
| 1528 | }, |
| 1529 | }; |
| 1530 | |
| 1531 | static int __init pm8xxx_pwm_init(void) |
| 1532 | { |
| 1533 | return platform_driver_register(&pm8xxx_pwm_driver); |
| 1534 | } |
| 1535 | |
| 1536 | static void __exit pm8xxx_pwm_exit(void) |
| 1537 | { |
| 1538 | platform_driver_unregister(&pm8xxx_pwm_driver); |
| 1539 | } |
| 1540 | |
| 1541 | subsys_initcall(pm8xxx_pwm_init); |
| 1542 | module_exit(pm8xxx_pwm_exit); |
| 1543 | |
| 1544 | MODULE_LICENSE("GPL v2"); |
| 1545 | MODULE_DESCRIPTION("PM8XXX PWM driver"); |
| 1546 | MODULE_VERSION("1.0"); |
| 1547 | MODULE_ALIAS("platform:" PM8XXX_PWM_DEV_NAME); |