Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 1 | /* |
| 2 | * lp5523.c - LP5523 LED Driver |
| 3 | * |
| 4 | * Copyright (C) 2010 Nokia Corporation |
Milo(Woogyom) Kim | a2387cb | 2013-02-05 19:28:00 +0900 | [diff] [blame] | 5 | * Copyright (C) 2012 Texas Instruments |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 6 | * |
| 7 | * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> |
Milo(Woogyom) Kim | a2387cb | 2013-02-05 19:28:00 +0900 | [diff] [blame] | 8 | * Milo(Woogyom) Kim <milo.kim@ti.com> |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * version 2 as published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 22 | * 02110-1301 USA |
| 23 | */ |
| 24 | |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 25 | #include <linux/delay.h> |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 26 | #include <linux/firmware.h> |
Milo(Woogyom) Kim | 79bcc10 | 2013-02-05 19:26:14 +0900 | [diff] [blame] | 27 | #include <linux/i2c.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/leds.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/mutex.h> |
| 32 | #include <linux/platform_data/leds-lp55xx.h> |
| 33 | #include <linux/slab.h> |
Milo(Woogyom) Kim | 6a0c9a4 | 2013-02-05 18:03:08 +0900 | [diff] [blame] | 34 | |
| 35 | #include "leds-lp55xx-common.h" |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 36 | |
Milo(Woogyom) Kim | 12f022d | 2013-02-05 19:25:26 +0900 | [diff] [blame] | 37 | #define LP5523_PROGRAM_LENGTH 32 |
| 38 | #define LP5523_MAX_LEDS 9 |
| 39 | |
| 40 | /* Registers */ |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 41 | #define LP5523_REG_ENABLE 0x00 |
| 42 | #define LP5523_REG_OP_MODE 0x01 |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 43 | #define LP5523_REG_ENABLE_LEDS_MSB 0x04 |
| 44 | #define LP5523_REG_ENABLE_LEDS_LSB 0x05 |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 45 | #define LP5523_REG_LED_PWM_BASE 0x16 |
| 46 | #define LP5523_REG_LED_CURRENT_BASE 0x26 |
| 47 | #define LP5523_REG_CONFIG 0x36 |
Milo(Woogyom) Kim | 12f022d | 2013-02-05 19:25:26 +0900 | [diff] [blame] | 48 | #define LP5523_REG_STATUS 0x3A |
| 49 | #define LP5523_REG_RESET 0x3D |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 50 | #define LP5523_REG_LED_TEST_CTRL 0x41 |
| 51 | #define LP5523_REG_LED_TEST_ADC 0x42 |
Milo Kim | 2246043 | 2013-08-08 13:57:35 +0900 | [diff] [blame] | 52 | #define LP5523_REG_CH1_PROG_START 0x4C |
| 53 | #define LP5523_REG_CH2_PROG_START 0x4D |
| 54 | #define LP5523_REG_CH3_PROG_START 0x4E |
Milo(Woogyom) Kim | 12f022d | 2013-02-05 19:25:26 +0900 | [diff] [blame] | 55 | #define LP5523_REG_PROG_PAGE_SEL 0x4F |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 56 | #define LP5523_REG_PROG_MEM 0x50 |
| 57 | |
Milo(Woogyom) Kim | 12f022d | 2013-02-05 19:25:26 +0900 | [diff] [blame] | 58 | /* Bit description in registers */ |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 59 | #define LP5523_ENABLE 0x40 |
| 60 | #define LP5523_AUTO_INC 0x40 |
| 61 | #define LP5523_PWR_SAVE 0x20 |
| 62 | #define LP5523_PWM_PWR_SAVE 0x04 |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 63 | #define LP5523_CP_AUTO 0x18 |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 64 | #define LP5523_AUTO_CLK 0x02 |
Milo(Woogyom) Kim | 12f022d | 2013-02-05 19:25:26 +0900 | [diff] [blame] | 65 | |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 66 | #define LP5523_EN_LEDTEST 0x80 |
| 67 | #define LP5523_LEDTEST_DONE 0x80 |
Milo(Woogyom) Kim | 48068d5 | 2013-02-05 18:08:49 +0900 | [diff] [blame] | 68 | #define LP5523_RESET 0xFF |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 69 | #define LP5523_ADC_SHORTCIRC_LIM 80 |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 70 | #define LP5523_EXT_CLK_USED 0x08 |
Milo Kim | 2246043 | 2013-08-08 13:57:35 +0900 | [diff] [blame] | 71 | #define LP5523_ENG_STATUS_MASK 0x07 |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 72 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 73 | /* Memory Page Selection */ |
| 74 | #define LP5523_PAGE_ENG1 0 |
| 75 | #define LP5523_PAGE_ENG2 1 |
| 76 | #define LP5523_PAGE_ENG3 2 |
Milo Kim | 45e611b | 2013-08-08 14:02:29 +0900 | [diff] [blame] | 77 | #define LP5523_PAGE_MUX1 3 |
| 78 | #define LP5523_PAGE_MUX2 4 |
| 79 | #define LP5523_PAGE_MUX3 5 |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 80 | |
| 81 | /* Program Memory Operations */ |
| 82 | #define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */ |
| 83 | #define LP5523_MODE_ENG2_M 0x0C |
| 84 | #define LP5523_MODE_ENG3_M 0x03 |
| 85 | #define LP5523_LOAD_ENG1 0x10 |
| 86 | #define LP5523_LOAD_ENG2 0x04 |
| 87 | #define LP5523_LOAD_ENG3 0x01 |
| 88 | |
| 89 | #define LP5523_ENG1_IS_LOADING(mode) \ |
| 90 | ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1) |
| 91 | #define LP5523_ENG2_IS_LOADING(mode) \ |
| 92 | ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2) |
| 93 | #define LP5523_ENG3_IS_LOADING(mode) \ |
| 94 | ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3) |
| 95 | |
| 96 | #define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */ |
| 97 | #define LP5523_EXEC_ENG2_M 0x0C |
| 98 | #define LP5523_EXEC_ENG3_M 0x03 |
| 99 | #define LP5523_EXEC_M 0x3F |
| 100 | #define LP5523_RUN_ENG1 0x20 |
| 101 | #define LP5523_RUN_ENG2 0x08 |
| 102 | #define LP5523_RUN_ENG3 0x02 |
| 103 | |
Milo Kim | 45e611b | 2013-08-08 14:02:29 +0900 | [diff] [blame] | 104 | #define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led))) |
| 105 | |
Kim, Milo | 27d7704 | 2012-09-04 15:06:18 +0800 | [diff] [blame] | 106 | enum lp5523_chip_id { |
| 107 | LP5523, |
| 108 | LP55231, |
| 109 | }; |
| 110 | |
Milo Kim | 2246043 | 2013-08-08 13:57:35 +0900 | [diff] [blame] | 111 | static int lp5523_init_program_engine(struct lp55xx_chip *chip); |
| 112 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 113 | static inline void lp5523_wait_opmode_done(void) |
| 114 | { |
| 115 | usleep_range(1000, 2000); |
| 116 | } |
| 117 | |
Milo(Woogyom) Kim | a96bfa1 | 2013-02-05 19:09:32 +0900 | [diff] [blame] | 118 | static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current) |
| 119 | { |
| 120 | led->led_current = led_current; |
| 121 | lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, |
| 122 | led_current); |
| 123 | } |
| 124 | |
Milo(Woogyom) Kim | ffbdccd | 2013-02-05 18:57:36 +0900 | [diff] [blame] | 125 | static int lp5523_post_init_device(struct lp55xx_chip *chip) |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 126 | { |
Milo(Woogyom) Kim | ffbdccd | 2013-02-05 18:57:36 +0900 | [diff] [blame] | 127 | int ret; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 128 | |
Milo(Woogyom) Kim | ffbdccd | 2013-02-05 18:57:36 +0900 | [diff] [blame] | 129 | ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE); |
Milo(Woogyom) Kim | 632418b | 2013-02-05 18:04:50 +0900 | [diff] [blame] | 130 | if (ret) |
| 131 | return ret; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 132 | |
Samu Onkalo | 2e4840e | 2010-11-24 12:57:04 -0800 | [diff] [blame] | 133 | /* Chip startup time is 500 us, 1 - 2 ms gives some margin */ |
| 134 | usleep_range(1000, 2000); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 135 | |
Milo(Woogyom) Kim | ffbdccd | 2013-02-05 18:57:36 +0900 | [diff] [blame] | 136 | ret = lp55xx_write(chip, LP5523_REG_CONFIG, |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 137 | LP5523_AUTO_INC | LP5523_PWR_SAVE | |
| 138 | LP5523_CP_AUTO | LP5523_AUTO_CLK | |
| 139 | LP5523_PWM_PWR_SAVE); |
Milo(Woogyom) Kim | 632418b | 2013-02-05 18:04:50 +0900 | [diff] [blame] | 140 | if (ret) |
Jingoo Han | 1b21ec5 | 2012-10-28 18:45:11 -0700 | [diff] [blame] | 141 | return ret; |
| 142 | |
Milo(Woogyom) Kim | 632418b | 2013-02-05 18:04:50 +0900 | [diff] [blame] | 143 | /* turn on all leds */ |
Milo(Woogyom) Kim | ffbdccd | 2013-02-05 18:57:36 +0900 | [diff] [blame] | 144 | ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01); |
Milo(Woogyom) Kim | 632418b | 2013-02-05 18:04:50 +0900 | [diff] [blame] | 145 | if (ret) |
| 146 | return ret; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 147 | |
Milo Kim | 2246043 | 2013-08-08 13:57:35 +0900 | [diff] [blame] | 148 | ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff); |
| 149 | if (ret) |
| 150 | return ret; |
| 151 | |
| 152 | return lp5523_init_program_engine(chip); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 153 | } |
| 154 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 155 | static void lp5523_load_engine(struct lp55xx_chip *chip) |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 156 | { |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 157 | enum lp55xx_engine_index idx = chip->engine_idx; |
| 158 | u8 mask[] = { |
| 159 | [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, |
| 160 | [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, |
| 161 | [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, |
| 162 | }; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 163 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 164 | u8 val[] = { |
| 165 | [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1, |
| 166 | [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2, |
| 167 | [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3, |
| 168 | }; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 169 | |
Milo Kim | b9e1730 | 2013-08-08 13:56:01 +0900 | [diff] [blame] | 170 | lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]); |
| 171 | |
| 172 | lp5523_wait_opmode_done(); |
| 173 | } |
| 174 | |
| 175 | static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip) |
| 176 | { |
| 177 | enum lp55xx_engine_index idx = chip->engine_idx; |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 178 | u8 page_sel[] = { |
| 179 | [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1, |
| 180 | [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2, |
| 181 | [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3, |
| 182 | }; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 183 | |
Milo Kim | b9e1730 | 2013-08-08 13:56:01 +0900 | [diff] [blame] | 184 | lp5523_load_engine(chip); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 185 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 186 | lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 187 | } |
| 188 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 189 | static void lp5523_stop_engine(struct lp55xx_chip *chip) |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 190 | { |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 191 | lp55xx_write(chip, LP5523_REG_OP_MODE, 0); |
| 192 | lp5523_wait_opmode_done(); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 193 | } |
| 194 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 195 | static void lp5523_turn_off_channels(struct lp55xx_chip *chip) |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 196 | { |
| 197 | int i; |
Kim, Milo | 469eba0 | 2012-08-21 17:04:02 +0800 | [diff] [blame] | 198 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 199 | for (i = 0; i < LP5523_MAX_LEDS; i++) |
| 200 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0); |
| 201 | } |
| 202 | |
| 203 | static void lp5523_run_engine(struct lp55xx_chip *chip, bool start) |
| 204 | { |
| 205 | int ret; |
| 206 | u8 mode; |
| 207 | u8 exec; |
| 208 | |
| 209 | /* stop engine */ |
| 210 | if (!start) { |
| 211 | lp5523_stop_engine(chip); |
| 212 | lp5523_turn_off_channels(chip); |
| 213 | return; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 214 | } |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 215 | |
| 216 | /* |
| 217 | * To run the engine, |
| 218 | * operation mode and enable register should updated at the same time |
| 219 | */ |
| 220 | |
| 221 | ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode); |
| 222 | if (ret) |
| 223 | return; |
| 224 | |
| 225 | ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec); |
| 226 | if (ret) |
| 227 | return; |
| 228 | |
| 229 | /* change operation mode to RUN only when each engine is loading */ |
| 230 | if (LP5523_ENG1_IS_LOADING(mode)) { |
| 231 | mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1; |
| 232 | exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1; |
| 233 | } |
| 234 | |
| 235 | if (LP5523_ENG2_IS_LOADING(mode)) { |
| 236 | mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2; |
| 237 | exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2; |
| 238 | } |
| 239 | |
| 240 | if (LP5523_ENG3_IS_LOADING(mode)) { |
| 241 | mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3; |
| 242 | exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3; |
| 243 | } |
| 244 | |
| 245 | lp55xx_write(chip, LP5523_REG_OP_MODE, mode); |
| 246 | lp5523_wait_opmode_done(); |
| 247 | |
| 248 | lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec); |
| 249 | } |
| 250 | |
Milo Kim | 2246043 | 2013-08-08 13:57:35 +0900 | [diff] [blame] | 251 | static int lp5523_init_program_engine(struct lp55xx_chip *chip) |
| 252 | { |
| 253 | int i; |
| 254 | int j; |
| 255 | int ret; |
| 256 | u8 status; |
| 257 | /* one pattern per engine setting LED MUX start and stop addresses */ |
| 258 | static const u8 pattern[][LP5523_PROGRAM_LENGTH] = { |
| 259 | { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0}, |
| 260 | { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0}, |
| 261 | { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, |
| 262 | }; |
| 263 | |
| 264 | /* hardcode 32 bytes of memory for each engine from program memory */ |
| 265 | ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00); |
| 266 | if (ret) |
| 267 | return ret; |
| 268 | |
| 269 | ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10); |
| 270 | if (ret) |
| 271 | return ret; |
| 272 | |
| 273 | ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20); |
| 274 | if (ret) |
| 275 | return ret; |
| 276 | |
| 277 | /* write LED MUX address space for each engine */ |
| 278 | for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { |
| 279 | chip->engine_idx = i; |
| 280 | lp5523_load_engine_and_select_page(chip); |
| 281 | |
| 282 | for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) { |
| 283 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j, |
| 284 | pattern[i - 1][j]); |
| 285 | if (ret) |
| 286 | goto out; |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | lp5523_run_engine(chip, true); |
| 291 | |
| 292 | /* Let the programs run for couple of ms and check the engine status */ |
| 293 | usleep_range(3000, 6000); |
| 294 | lp55xx_read(chip, LP5523_REG_STATUS, &status); |
| 295 | status &= LP5523_ENG_STATUS_MASK; |
| 296 | |
| 297 | if (status != LP5523_ENG_STATUS_MASK) { |
| 298 | dev_err(&chip->cl->dev, |
| 299 | "cound not configure LED engine, status = 0x%.2x\n", |
| 300 | status); |
| 301 | ret = -1; |
| 302 | } |
| 303 | |
| 304 | out: |
| 305 | lp5523_stop_engine(chip); |
| 306 | return ret; |
| 307 | } |
| 308 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 309 | static int lp5523_update_program_memory(struct lp55xx_chip *chip, |
| 310 | const u8 *data, size_t size) |
| 311 | { |
| 312 | u8 pattern[LP5523_PROGRAM_LENGTH] = {0}; |
| 313 | unsigned cmd; |
| 314 | char c[3]; |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 315 | int nrchars; |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 316 | int ret; |
Milo Kim | 2f733ca | 2013-08-08 14:09:24 +0900 | [diff] [blame] | 317 | int offset = 0; |
| 318 | int i = 0; |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 319 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 320 | while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) { |
| 321 | /* separate sscanfs because length is working only for %s */ |
| 322 | ret = sscanf(data + offset, "%2s%n ", c, &nrchars); |
| 323 | if (ret != 1) |
| 324 | goto err; |
| 325 | |
| 326 | ret = sscanf(c, "%2x", &cmd); |
| 327 | if (ret != 1) |
| 328 | goto err; |
| 329 | |
| 330 | pattern[i] = (u8)cmd; |
| 331 | offset += nrchars; |
| 332 | i++; |
| 333 | } |
| 334 | |
| 335 | /* Each instruction is 16bit long. Check that length is even */ |
| 336 | if (i % 2) |
| 337 | goto err; |
| 338 | |
Milo Kim | 45e611b | 2013-08-08 14:02:29 +0900 | [diff] [blame] | 339 | mutex_lock(&chip->lock); |
| 340 | |
Milo Kim | 2f733ca | 2013-08-08 14:09:24 +0900 | [diff] [blame] | 341 | for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) { |
Milo Kim | 45e611b | 2013-08-08 14:02:29 +0900 | [diff] [blame] | 342 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]); |
| 343 | if (ret) { |
| 344 | mutex_unlock(&chip->lock); |
| 345 | return -EINVAL; |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | mutex_unlock(&chip->lock); |
| 350 | |
| 351 | return size; |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 352 | |
| 353 | err: |
| 354 | dev_err(&chip->cl->dev, "wrong pattern format\n"); |
| 355 | return -EINVAL; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 356 | } |
| 357 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 358 | static void lp5523_firmware_loaded(struct lp55xx_chip *chip) |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 359 | { |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 360 | const struct firmware *fw = chip->fw; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 361 | |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 362 | if (fw->size > LP5523_PROGRAM_LENGTH) { |
| 363 | dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", |
| 364 | fw->size); |
| 365 | return; |
| 366 | } |
| 367 | |
| 368 | /* |
| 369 | * Program momery sequence |
| 370 | * 1) set engine mode to "LOAD" |
| 371 | * 2) write firmware data into program memory |
| 372 | */ |
| 373 | |
Milo Kim | b9e1730 | 2013-08-08 13:56:01 +0900 | [diff] [blame] | 374 | lp5523_load_engine_and_select_page(chip); |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 375 | lp5523_update_program_memory(chip, fw->data, fw->size); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 376 | } |
| 377 | |
Milo Kim | 45e611b | 2013-08-08 14:02:29 +0900 | [diff] [blame] | 378 | static ssize_t show_engine_mode(struct device *dev, |
| 379 | struct device_attribute *attr, |
| 380 | char *buf, int nr) |
| 381 | { |
| 382 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| 383 | struct lp55xx_chip *chip = led->chip; |
| 384 | enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode; |
| 385 | |
| 386 | switch (mode) { |
| 387 | case LP55XX_ENGINE_RUN: |
| 388 | return sprintf(buf, "run\n"); |
| 389 | case LP55XX_ENGINE_LOAD: |
| 390 | return sprintf(buf, "load\n"); |
| 391 | case LP55XX_ENGINE_DISABLED: |
| 392 | default: |
| 393 | return sprintf(buf, "disabled\n"); |
| 394 | } |
| 395 | } |
| 396 | show_mode(1) |
| 397 | show_mode(2) |
| 398 | show_mode(3) |
| 399 | |
| 400 | static ssize_t store_engine_mode(struct device *dev, |
| 401 | struct device_attribute *attr, |
| 402 | const char *buf, size_t len, int nr) |
| 403 | { |
| 404 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| 405 | struct lp55xx_chip *chip = led->chip; |
| 406 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; |
| 407 | |
| 408 | mutex_lock(&chip->lock); |
| 409 | |
| 410 | chip->engine_idx = nr; |
| 411 | |
| 412 | if (!strncmp(buf, "run", 3)) { |
| 413 | lp5523_run_engine(chip, true); |
| 414 | engine->mode = LP55XX_ENGINE_RUN; |
| 415 | } else if (!strncmp(buf, "load", 4)) { |
| 416 | lp5523_stop_engine(chip); |
| 417 | lp5523_load_engine(chip); |
| 418 | engine->mode = LP55XX_ENGINE_LOAD; |
| 419 | } else if (!strncmp(buf, "disabled", 8)) { |
| 420 | lp5523_stop_engine(chip); |
| 421 | engine->mode = LP55XX_ENGINE_DISABLED; |
| 422 | } |
| 423 | |
| 424 | mutex_unlock(&chip->lock); |
| 425 | |
| 426 | return len; |
| 427 | } |
| 428 | store_mode(1) |
| 429 | store_mode(2) |
| 430 | store_mode(3) |
| 431 | |
| 432 | static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len) |
| 433 | { |
| 434 | u16 tmp_mux = 0; |
| 435 | int i; |
| 436 | |
| 437 | len = min_t(int, len, LP5523_MAX_LEDS); |
| 438 | |
| 439 | for (i = 0; i < len; i++) { |
| 440 | switch (buf[i]) { |
| 441 | case '1': |
| 442 | tmp_mux |= (1 << i); |
| 443 | break; |
| 444 | case '0': |
| 445 | break; |
| 446 | case '\n': |
| 447 | i = len; |
| 448 | break; |
| 449 | default: |
| 450 | return -1; |
| 451 | } |
| 452 | } |
| 453 | *mux = tmp_mux; |
| 454 | |
| 455 | return 0; |
| 456 | } |
| 457 | |
| 458 | static void lp5523_mux_to_array(u16 led_mux, char *array) |
| 459 | { |
| 460 | int i, pos = 0; |
| 461 | for (i = 0; i < LP5523_MAX_LEDS; i++) |
| 462 | pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i)); |
| 463 | |
| 464 | array[pos] = '\0'; |
| 465 | } |
| 466 | |
| 467 | static ssize_t show_engine_leds(struct device *dev, |
| 468 | struct device_attribute *attr, |
| 469 | char *buf, int nr) |
| 470 | { |
| 471 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| 472 | struct lp55xx_chip *chip = led->chip; |
| 473 | char mux[LP5523_MAX_LEDS + 1]; |
| 474 | |
| 475 | lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux); |
| 476 | |
| 477 | return sprintf(buf, "%s\n", mux); |
| 478 | } |
| 479 | show_leds(1) |
| 480 | show_leds(2) |
| 481 | show_leds(3) |
| 482 | |
| 483 | static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr) |
| 484 | { |
| 485 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; |
| 486 | int ret; |
| 487 | u8 mux_page[] = { |
| 488 | [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1, |
| 489 | [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2, |
| 490 | [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3, |
| 491 | }; |
| 492 | |
| 493 | lp5523_load_engine(chip); |
| 494 | |
| 495 | ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]); |
| 496 | if (ret) |
| 497 | return ret; |
| 498 | |
| 499 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM , (u8)(mux >> 8)); |
| 500 | if (ret) |
| 501 | return ret; |
| 502 | |
| 503 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux)); |
| 504 | if (ret) |
| 505 | return ret; |
| 506 | |
| 507 | engine->led_mux = mux; |
| 508 | return 0; |
| 509 | } |
| 510 | |
| 511 | static ssize_t store_engine_leds(struct device *dev, |
| 512 | struct device_attribute *attr, |
| 513 | const char *buf, size_t len, int nr) |
| 514 | { |
| 515 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| 516 | struct lp55xx_chip *chip = led->chip; |
| 517 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; |
| 518 | u16 mux = 0; |
| 519 | ssize_t ret; |
| 520 | |
| 521 | if (lp5523_mux_parse(buf, &mux, len)) |
| 522 | return -EINVAL; |
| 523 | |
| 524 | mutex_lock(&chip->lock); |
| 525 | |
| 526 | chip->engine_idx = nr; |
| 527 | ret = -EINVAL; |
| 528 | |
| 529 | if (engine->mode != LP55XX_ENGINE_LOAD) |
| 530 | goto leave; |
| 531 | |
| 532 | if (lp5523_load_mux(chip, mux, nr)) |
| 533 | goto leave; |
| 534 | |
| 535 | ret = len; |
| 536 | leave: |
| 537 | mutex_unlock(&chip->lock); |
| 538 | return ret; |
| 539 | } |
| 540 | store_leds(1) |
| 541 | store_leds(2) |
| 542 | store_leds(3) |
| 543 | |
| 544 | static ssize_t store_engine_load(struct device *dev, |
| 545 | struct device_attribute *attr, |
| 546 | const char *buf, size_t len, int nr) |
| 547 | { |
| 548 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| 549 | struct lp55xx_chip *chip = led->chip; |
| 550 | |
| 551 | mutex_lock(&chip->lock); |
| 552 | |
| 553 | chip->engine_idx = nr; |
| 554 | lp5523_load_engine_and_select_page(chip); |
| 555 | |
| 556 | mutex_unlock(&chip->lock); |
| 557 | |
| 558 | return lp5523_update_program_memory(chip, buf, len); |
| 559 | } |
| 560 | store_load(1) |
| 561 | store_load(2) |
| 562 | store_load(3) |
| 563 | |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 564 | static ssize_t lp5523_selftest(struct device *dev, |
| 565 | struct device_attribute *attr, |
| 566 | char *buf) |
| 567 | { |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 568 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| 569 | struct lp55xx_chip *chip = led->chip; |
| 570 | struct lp55xx_platform_data *pdata = chip->pdata; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 571 | int i, ret, pos = 0; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 572 | u8 status, adc, vdd; |
| 573 | |
| 574 | mutex_lock(&chip->lock); |
| 575 | |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 576 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 577 | if (ret < 0) |
| 578 | goto fail; |
| 579 | |
| 580 | /* Check that ext clock is really in use if requested */ |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 581 | if (pdata->clock_mode == LP55XX_CLOCK_EXT) { |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 582 | if ((status & LP5523_EXT_CLK_USED) == 0) |
| 583 | goto fail; |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 584 | } |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 585 | |
| 586 | /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */ |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 587 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16); |
Samu Onkalo | 2e4840e | 2010-11-24 12:57:04 -0800 | [diff] [blame] | 588 | usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */ |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 589 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
Jingoo Han | 1b21ec5 | 2012-10-28 18:45:11 -0700 | [diff] [blame] | 590 | if (ret < 0) |
| 591 | goto fail; |
| 592 | |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 593 | if (!(status & LP5523_LEDTEST_DONE)) |
Samu Onkalo | 2e4840e | 2010-11-24 12:57:04 -0800 | [diff] [blame] | 594 | usleep_range(3000, 6000); /* Was not ready. Wait little bit */ |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 595 | |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 596 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd); |
Jingoo Han | 1b21ec5 | 2012-10-28 18:45:11 -0700 | [diff] [blame] | 597 | if (ret < 0) |
| 598 | goto fail; |
| 599 | |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 600 | vdd--; /* There may be some fluctuation in measurement */ |
| 601 | |
Milo(Woogyom) Kim | 0e20234 | 2013-02-05 19:07:34 +0900 | [diff] [blame] | 602 | for (i = 0; i < LP5523_MAX_LEDS; i++) { |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 603 | /* Skip non-existing channels */ |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 604 | if (pdata->led_config[i].led_current == 0) |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 605 | continue; |
| 606 | |
| 607 | /* Set default current */ |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 608 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
| 609 | pdata->led_config[i].led_current); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 610 | |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 611 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff); |
Samu Onkalo | 2e4840e | 2010-11-24 12:57:04 -0800 | [diff] [blame] | 612 | /* let current stabilize 2 - 4ms before measurements start */ |
| 613 | usleep_range(2000, 4000); |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 614 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 615 | LP5523_EN_LEDTEST | i); |
Samu Onkalo | 2e4840e | 2010-11-24 12:57:04 -0800 | [diff] [blame] | 616 | /* ADC conversion time is 2.7 ms typically */ |
| 617 | usleep_range(3000, 6000); |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 618 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
Jingoo Han | 1b21ec5 | 2012-10-28 18:45:11 -0700 | [diff] [blame] | 619 | if (ret < 0) |
| 620 | goto fail; |
| 621 | |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 622 | if (!(status & LP5523_LEDTEST_DONE)) |
Samu Onkalo | 2e4840e | 2010-11-24 12:57:04 -0800 | [diff] [blame] | 623 | usleep_range(3000, 6000);/* Was not ready. Wait. */ |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 624 | |
| 625 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc); |
Jingoo Han | 1b21ec5 | 2012-10-28 18:45:11 -0700 | [diff] [blame] | 626 | if (ret < 0) |
| 627 | goto fail; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 628 | |
| 629 | if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM) |
| 630 | pos += sprintf(buf + pos, "LED %d FAIL\n", i); |
| 631 | |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 632 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 633 | |
| 634 | /* Restore current */ |
Milo(Woogyom) Kim | 9ca3bd8 | 2013-02-05 19:21:43 +0900 | [diff] [blame] | 635 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
| 636 | led->led_current); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 637 | led++; |
| 638 | } |
| 639 | if (pos == 0) |
| 640 | pos = sprintf(buf, "OK\n"); |
| 641 | goto release_lock; |
| 642 | fail: |
| 643 | pos = sprintf(buf, "FAIL\n"); |
| 644 | |
| 645 | release_lock: |
| 646 | mutex_unlock(&chip->lock); |
| 647 | |
| 648 | return pos; |
| 649 | } |
| 650 | |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 651 | static void lp5523_led_brightness_work(struct work_struct *work) |
| 652 | { |
Milo(Woogyom) Kim | a6e4679 | 2013-02-05 19:08:40 +0900 | [diff] [blame] | 653 | struct lp55xx_led *led = container_of(work, struct lp55xx_led, |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 654 | brightness_work); |
Milo(Woogyom) Kim | a6e4679 | 2013-02-05 19:08:40 +0900 | [diff] [blame] | 655 | struct lp55xx_chip *chip = led->chip; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 656 | |
| 657 | mutex_lock(&chip->lock); |
Milo(Woogyom) Kim | a6e4679 | 2013-02-05 19:08:40 +0900 | [diff] [blame] | 658 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr, |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 659 | led->brightness); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 660 | mutex_unlock(&chip->lock); |
| 661 | } |
| 662 | |
Milo Kim | 45e611b | 2013-08-08 14:02:29 +0900 | [diff] [blame] | 663 | static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode); |
| 664 | static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode); |
| 665 | static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode); |
| 666 | static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds); |
| 667 | static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds); |
| 668 | static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds); |
| 669 | static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load); |
| 670 | static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load); |
| 671 | static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load); |
| 672 | static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 673 | |
| 674 | static struct attribute *lp5523_attributes[] = { |
Milo Kim | 45e611b | 2013-08-08 14:02:29 +0900 | [diff] [blame] | 675 | &dev_attr_engine1_mode.attr, |
| 676 | &dev_attr_engine2_mode.attr, |
| 677 | &dev_attr_engine3_mode.attr, |
| 678 | &dev_attr_engine1_load.attr, |
| 679 | &dev_attr_engine2_load.attr, |
| 680 | &dev_attr_engine3_load.attr, |
| 681 | &dev_attr_engine1_leds.attr, |
| 682 | &dev_attr_engine2_leds.attr, |
| 683 | &dev_attr_engine3_leds.attr, |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 684 | &dev_attr_selftest.attr, |
Kim, Milo | f162584 | 2012-09-12 20:16:03 +0800 | [diff] [blame] | 685 | NULL, |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 686 | }; |
| 687 | |
| 688 | static const struct attribute_group lp5523_group = { |
| 689 | .attrs = lp5523_attributes, |
| 690 | }; |
| 691 | |
Milo(Woogyom) Kim | 48068d5 | 2013-02-05 18:08:49 +0900 | [diff] [blame] | 692 | /* Chip specific configurations */ |
| 693 | static struct lp55xx_device_config lp5523_cfg = { |
| 694 | .reset = { |
| 695 | .addr = LP5523_REG_RESET, |
| 696 | .val = LP5523_RESET, |
| 697 | }, |
Milo(Woogyom) Kim | e3a700d | 2013-02-05 18:09:56 +0900 | [diff] [blame] | 698 | .enable = { |
| 699 | .addr = LP5523_REG_ENABLE, |
| 700 | .val = LP5523_ENABLE, |
| 701 | }, |
Milo(Woogyom) Kim | 0e20234 | 2013-02-05 19:07:34 +0900 | [diff] [blame] | 702 | .max_channel = LP5523_MAX_LEDS, |
Milo(Woogyom) Kim | ffbdccd | 2013-02-05 18:57:36 +0900 | [diff] [blame] | 703 | .post_init_device = lp5523_post_init_device, |
Milo(Woogyom) Kim | a6e4679 | 2013-02-05 19:08:40 +0900 | [diff] [blame] | 704 | .brightness_work_fn = lp5523_led_brightness_work, |
Milo(Woogyom) Kim | a96bfa1 | 2013-02-05 19:09:32 +0900 | [diff] [blame] | 705 | .set_led_current = lp5523_set_led_current, |
Milo(Woogyom) Kim | db6eaf8 | 2013-02-05 19:18:51 +0900 | [diff] [blame] | 706 | .firmware_cb = lp5523_firmware_loaded, |
| 707 | .run_engine = lp5523_run_engine, |
Milo(Woogyom) Kim | e73c0ce | 2013-02-05 19:20:45 +0900 | [diff] [blame] | 708 | .dev_attr_group = &lp5523_group, |
Milo(Woogyom) Kim | 48068d5 | 2013-02-05 18:08:49 +0900 | [diff] [blame] | 709 | }; |
| 710 | |
Bill Pemberton | 98ea1ea | 2012-11-19 13:23:02 -0500 | [diff] [blame] | 711 | static int lp5523_probe(struct i2c_client *client, |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 712 | const struct i2c_device_id *id) |
| 713 | { |
Milo(Woogyom) Kim | 22ebeb4 | 2013-02-05 18:58:35 +0900 | [diff] [blame] | 714 | int ret; |
Milo(Woogyom) Kim | 6a0c9a4 | 2013-02-05 18:03:08 +0900 | [diff] [blame] | 715 | struct lp55xx_chip *chip; |
| 716 | struct lp55xx_led *led; |
Linus Walleij | 7542a04b | 2013-04-23 04:52:59 -0700 | [diff] [blame] | 717 | struct lp55xx_platform_data *pdata; |
| 718 | struct device_node *np = client->dev.of_node; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 719 | |
Jingoo Han | 87aae1e | 2013-07-30 01:07:35 -0700 | [diff] [blame] | 720 | if (!dev_get_platdata(&client->dev)) { |
Linus Walleij | 7542a04b | 2013-04-23 04:52:59 -0700 | [diff] [blame] | 721 | if (np) { |
| 722 | ret = lp55xx_of_populate_pdata(&client->dev, np); |
| 723 | if (ret < 0) |
| 724 | return ret; |
| 725 | } else { |
| 726 | dev_err(&client->dev, "no platform data\n"); |
| 727 | return -EINVAL; |
| 728 | } |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 729 | } |
Jingoo Han | 87aae1e | 2013-07-30 01:07:35 -0700 | [diff] [blame] | 730 | pdata = dev_get_platdata(&client->dev); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 731 | |
Milo(Woogyom) Kim | 6a0c9a4 | 2013-02-05 18:03:08 +0900 | [diff] [blame] | 732 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
| 733 | if (!chip) |
| 734 | return -ENOMEM; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 735 | |
Milo(Woogyom) Kim | 6a0c9a4 | 2013-02-05 18:03:08 +0900 | [diff] [blame] | 736 | led = devm_kzalloc(&client->dev, |
| 737 | sizeof(*led) * pdata->num_channels, GFP_KERNEL); |
| 738 | if (!led) |
| 739 | return -ENOMEM; |
| 740 | |
| 741 | chip->cl = client; |
| 742 | chip->pdata = pdata; |
Milo(Woogyom) Kim | 48068d5 | 2013-02-05 18:08:49 +0900 | [diff] [blame] | 743 | chip->cfg = &lp5523_cfg; |
Milo(Woogyom) Kim | 6a0c9a4 | 2013-02-05 18:03:08 +0900 | [diff] [blame] | 744 | |
| 745 | mutex_init(&chip->lock); |
| 746 | |
| 747 | i2c_set_clientdata(client, led); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 748 | |
Milo(Woogyom) Kim | 22ebeb4 | 2013-02-05 18:58:35 +0900 | [diff] [blame] | 749 | ret = lp55xx_init_device(chip); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 750 | if (ret) |
Milo(Woogyom) Kim | f6c64c6 | 2013-02-05 17:58:01 +0900 | [diff] [blame] | 751 | goto err_init; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 752 | |
Kim, Milo | 56a1e9a | 2012-09-04 15:06:26 +0800 | [diff] [blame] | 753 | dev_info(&client->dev, "%s Programmable led chip found\n", id->name); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 754 | |
Milo(Woogyom) Kim | 9e9b3db | 2013-02-05 19:06:27 +0900 | [diff] [blame] | 755 | ret = lp55xx_register_leds(led, chip); |
Milo(Woogyom) Kim | f652480 | 2013-02-05 17:53:40 +0900 | [diff] [blame] | 756 | if (ret) |
Milo(Woogyom) Kim | 9e9b3db | 2013-02-05 19:06:27 +0900 | [diff] [blame] | 757 | goto err_register_leds; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 758 | |
Milo(Woogyom) Kim | e73c0ce | 2013-02-05 19:20:45 +0900 | [diff] [blame] | 759 | ret = lp55xx_register_sysfs(chip); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 760 | if (ret) { |
| 761 | dev_err(&client->dev, "registering sysfs failed\n"); |
Milo(Woogyom) Kim | e73c0ce | 2013-02-05 19:20:45 +0900 | [diff] [blame] | 762 | goto err_register_sysfs; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 763 | } |
Milo(Woogyom) Kim | e73c0ce | 2013-02-05 19:20:45 +0900 | [diff] [blame] | 764 | |
| 765 | return 0; |
| 766 | |
| 767 | err_register_sysfs: |
Milo(Woogyom) Kim | c3a68eb | 2013-02-05 19:11:18 +0900 | [diff] [blame] | 768 | lp55xx_unregister_leds(led, chip); |
Milo(Woogyom) Kim | 9e9b3db | 2013-02-05 19:06:27 +0900 | [diff] [blame] | 769 | err_register_leds: |
Milo(Woogyom) Kim | 6ce6176 | 2013-02-05 19:03:02 +0900 | [diff] [blame] | 770 | lp55xx_deinit_device(chip); |
Milo(Woogyom) Kim | f6c64c6 | 2013-02-05 17:58:01 +0900 | [diff] [blame] | 771 | err_init: |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 772 | return ret; |
| 773 | } |
| 774 | |
| 775 | static int lp5523_remove(struct i2c_client *client) |
| 776 | { |
Milo(Woogyom) Kim | 6ce6176 | 2013-02-05 19:03:02 +0900 | [diff] [blame] | 777 | struct lp55xx_led *led = i2c_get_clientdata(client); |
| 778 | struct lp55xx_chip *chip = led->chip; |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 779 | |
Milo(Woogyom) Kim | 87cc4bd | 2013-02-05 19:23:51 +0900 | [diff] [blame] | 780 | lp5523_stop_engine(chip); |
| 781 | lp55xx_unregister_sysfs(chip); |
Milo(Woogyom) Kim | c3a68eb | 2013-02-05 19:11:18 +0900 | [diff] [blame] | 782 | lp55xx_unregister_leds(led, chip); |
Milo(Woogyom) Kim | 6ce6176 | 2013-02-05 19:03:02 +0900 | [diff] [blame] | 783 | lp55xx_deinit_device(chip); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 784 | |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 785 | return 0; |
| 786 | } |
| 787 | |
| 788 | static const struct i2c_device_id lp5523_id[] = { |
Kim, Milo | 27d7704 | 2012-09-04 15:06:18 +0800 | [diff] [blame] | 789 | { "lp5523", LP5523 }, |
| 790 | { "lp55231", LP55231 }, |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 791 | { } |
| 792 | }; |
| 793 | |
| 794 | MODULE_DEVICE_TABLE(i2c, lp5523_id); |
| 795 | |
Axel Lin | 33c88b6 | 2013-05-08 21:48:57 -0700 | [diff] [blame] | 796 | #ifdef CONFIG_OF |
| 797 | static const struct of_device_id of_lp5523_leds_match[] = { |
| 798 | { .compatible = "national,lp5523", }, |
| 799 | {}, |
| 800 | }; |
| 801 | |
| 802 | MODULE_DEVICE_TABLE(of, of_lp5523_leds_match); |
| 803 | #endif |
| 804 | |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 805 | static struct i2c_driver lp5523_driver = { |
| 806 | .driver = { |
Kim, Milo | 27d7704 | 2012-09-04 15:06:18 +0800 | [diff] [blame] | 807 | .name = "lp5523x", |
Axel Lin | 33c88b6 | 2013-05-08 21:48:57 -0700 | [diff] [blame] | 808 | .of_match_table = of_match_ptr(of_lp5523_leds_match), |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 809 | }, |
| 810 | .probe = lp5523_probe, |
| 811 | .remove = lp5523_remove, |
| 812 | .id_table = lp5523_id, |
| 813 | }; |
| 814 | |
Axel Lin | 09a0d18 | 2012-01-10 15:09:27 -0800 | [diff] [blame] | 815 | module_i2c_driver(lp5523_driver); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 816 | |
| 817 | MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>"); |
Milo(Woogyom) Kim | a2387cb | 2013-02-05 19:28:00 +0900 | [diff] [blame] | 818 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
Samu Onkalo | 0efba16 | 2010-11-11 14:05:22 -0800 | [diff] [blame] | 819 | MODULE_DESCRIPTION("LP5523 LED engine"); |
| 820 | MODULE_LICENSE("GPL"); |