Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 1 | /* Copyright (c) 2010-2012, Code Aurora Forum. 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 | |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 13 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 14 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/platform_device.h> |
| 19 | #include <linux/leds.h> |
| 20 | #include <linux/workqueue.h> |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 21 | #include <linux/err.h> |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 22 | |
| 23 | #include <linux/mfd/pm8xxx/core.h> |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 24 | #include <linux/mfd/pm8xxx/pwm.h> |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 25 | #include <linux/leds-pm8xxx.h> |
| 26 | |
| 27 | #define SSBI_REG_ADDR_DRV_KEYPAD 0x48 |
| 28 | #define PM8XXX_DRV_KEYPAD_BL_MASK 0xf0 |
| 29 | #define PM8XXX_DRV_KEYPAD_BL_SHIFT 0x04 |
| 30 | |
| 31 | #define SSBI_REG_ADDR_FLASH_DRV0 0x49 |
| 32 | #define PM8XXX_DRV_FLASH_MASK 0xf0 |
| 33 | #define PM8XXX_DRV_FLASH_SHIFT 0x04 |
| 34 | |
| 35 | #define SSBI_REG_ADDR_FLASH_DRV1 0xFB |
| 36 | |
| 37 | #define SSBI_REG_ADDR_LED_CTRL_BASE 0x131 |
| 38 | #define SSBI_REG_ADDR_LED_CTRL(n) (SSBI_REG_ADDR_LED_CTRL_BASE + (n)) |
| 39 | #define PM8XXX_DRV_LED_CTRL_MASK 0xf8 |
| 40 | #define PM8XXX_DRV_LED_CTRL_SHIFT 0x03 |
| 41 | |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 42 | #define SSBI_REG_ADDR_WLED_CTRL_BASE 0x25A |
| 43 | #define SSBI_REG_ADDR_WLED_CTRL(n) (SSBI_REG_ADDR_WLED_CTRL_BASE + (n) - 1) |
| 44 | |
| 45 | /* wled control registers */ |
| 46 | #define WLED_MOD_CTRL_REG SSBI_REG_ADDR_WLED_CTRL(1) |
| 47 | #define WLED_MAX_CURR_CFG_REG(n) SSBI_REG_ADDR_WLED_CTRL(n + 2) |
| 48 | #define WLED_BRIGHTNESS_CNTL_REG1(n) SSBI_REG_ADDR_WLED_CTRL(n + 5) |
| 49 | #define WLED_BRIGHTNESS_CNTL_REG2(n) SSBI_REG_ADDR_WLED_CTRL(n + 6) |
| 50 | #define WLED_SYNC_REG SSBI_REG_ADDR_WLED_CTRL(11) |
| 51 | #define WLED_OVP_CFG_REG SSBI_REG_ADDR_WLED_CTRL(13) |
| 52 | #define WLED_BOOST_CFG_REG SSBI_REG_ADDR_WLED_CTRL(14) |
| 53 | #define WLED_HIGH_POLE_CAP_REG SSBI_REG_ADDR_WLED_CTRL(16) |
| 54 | |
| 55 | #define WLED_STRINGS 0x03 |
| 56 | #define WLED_OVP_VAL_MASK 0x30 |
| 57 | #define WLED_OVP_VAL_BIT_SHFT 0x04 |
| 58 | #define WLED_BOOST_LIMIT_MASK 0xE0 |
| 59 | #define WLED_BOOST_LIMIT_BIT_SHFT 0x05 |
| 60 | #define WLED_EN_MASK 0x01 |
| 61 | #define WLED_CP_SELECT_MAX 0x03 |
| 62 | #define WLED_CP_SELECT_MASK 0x03 |
| 63 | #define WLED_DIG_MOD_GEN_MASK 0x70 |
| 64 | #define WLED_CS_OUT_MASK 0x0E |
| 65 | #define WLED_CTL_DLY_STEP 200 |
| 66 | #define WLED_CTL_DLY_MAX 1400 |
| 67 | #define WLED_CTL_DLY_MASK 0xE0 |
| 68 | #define WLED_CTL_DLY_BIT_SHFT 0x05 |
| 69 | #define WLED_MAX_CURR 25 |
| 70 | #define WLED_MAX_CURR_MASK 0x1F |
| 71 | #define WLED_OP_FDBCK_MASK 0x1C |
| 72 | #define WLED_OP_FDBCK_BIT_SHFT 0x02 |
| 73 | |
| 74 | #define WLED_MAX_LEVEL 100 |
| 75 | #define WLED_8_BIT_MASK 0xFF |
| 76 | #define WLED_8_BIT_SHFT 0x08 |
| 77 | #define WLED_MAX_DUTY_CYCLE 0xFFF |
| 78 | |
| 79 | #define WLED_SYNC_VAL 0x07 |
| 80 | #define WLED_SYNC_RESET_VAL 0x00 |
| 81 | |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 82 | #define MAX_FLASH_LED_CURRENT 300 |
| 83 | #define MAX_LC_LED_CURRENT 40 |
| 84 | #define MAX_KP_BL_LED_CURRENT 300 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 85 | |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 86 | #define PM8XXX_ID_LED_CURRENT_FACTOR 2 /* Iout = x * 2mA */ |
| 87 | #define PM8XXX_ID_FLASH_CURRENT_FACTOR 20 /* Iout = x * 20mA */ |
| 88 | |
| 89 | #define PM8XXX_FLASH_MODE_DBUS1 1 |
| 90 | #define PM8XXX_FLASH_MODE_DBUS2 2 |
| 91 | #define PM8XXX_FLASH_MODE_PWM 3 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 92 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 93 | #define MAX_LC_LED_BRIGHTNESS 20 |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 94 | #define MAX_FLASH_BRIGHTNESS 15 |
| 95 | #define MAX_KB_LED_BRIGHTNESS 15 |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 96 | |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 97 | #define PM8XXX_LED_OFFSET(id) ((id) - PM8XXX_ID_LED_0) |
| 98 | |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 99 | #define PM8XXX_LED_PWM_FLAGS (PM_PWM_LUT_LOOP | PM_PWM_LUT_RAMP_UP) |
| 100 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 101 | /** |
| 102 | * struct pm8xxx_led_data - internal led data structure |
| 103 | * @led_classdev - led class device |
| 104 | * @id - led index |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 105 | * @work - workqueue for led |
| 106 | * @lock - to protect the transactions |
| 107 | * @reg - cached value of led register |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 108 | * @pwm_dev - pointer to PWM device if LED is driven using PWM |
| 109 | * @pwm_channel - PWM channel ID |
| 110 | * @pwm_period_us - PWM period in micro seconds |
| 111 | * @pwm_duty_cycles - struct that describes PWM duty cycles info |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 112 | */ |
| 113 | struct pm8xxx_led_data { |
| 114 | struct led_classdev cdev; |
| 115 | int id; |
| 116 | u8 reg; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 117 | struct device *dev; |
| 118 | struct work_struct work; |
| 119 | struct mutex lock; |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 120 | struct pwm_device *pwm_dev; |
| 121 | int pwm_channel; |
| 122 | u32 pwm_period_us; |
| 123 | struct pm8xxx_pwm_duty_cycles *pwm_duty_cycles; |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 124 | struct wled_config_data *wled_cfg; |
| 125 | int max_current; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 126 | }; |
| 127 | |
| 128 | static void led_kp_set(struct pm8xxx_led_data *led, enum led_brightness value) |
| 129 | { |
| 130 | int rc; |
| 131 | u8 level; |
| 132 | |
| 133 | level = (value << PM8XXX_DRV_KEYPAD_BL_SHIFT) & |
| 134 | PM8XXX_DRV_KEYPAD_BL_MASK; |
| 135 | |
| 136 | led->reg &= ~PM8XXX_DRV_KEYPAD_BL_MASK; |
| 137 | led->reg |= level; |
| 138 | |
| 139 | rc = pm8xxx_writeb(led->dev->parent, SSBI_REG_ADDR_DRV_KEYPAD, |
| 140 | led->reg); |
| 141 | if (rc < 0) |
| 142 | dev_err(led->cdev.dev, |
| 143 | "can't set keypad backlight level rc=%d\n", rc); |
| 144 | } |
| 145 | |
| 146 | static void led_lc_set(struct pm8xxx_led_data *led, enum led_brightness value) |
| 147 | { |
| 148 | int rc, offset; |
| 149 | u8 level; |
| 150 | |
| 151 | level = (value << PM8XXX_DRV_LED_CTRL_SHIFT) & |
| 152 | PM8XXX_DRV_LED_CTRL_MASK; |
| 153 | |
| 154 | offset = PM8XXX_LED_OFFSET(led->id); |
| 155 | |
| 156 | led->reg &= ~PM8XXX_DRV_LED_CTRL_MASK; |
| 157 | led->reg |= level; |
| 158 | |
| 159 | rc = pm8xxx_writeb(led->dev->parent, SSBI_REG_ADDR_LED_CTRL(offset), |
| 160 | led->reg); |
| 161 | if (rc) |
| 162 | dev_err(led->cdev.dev, "can't set (%d) led value rc=%d\n", |
| 163 | led->id, rc); |
| 164 | } |
| 165 | |
| 166 | static void |
| 167 | led_flash_set(struct pm8xxx_led_data *led, enum led_brightness value) |
| 168 | { |
| 169 | int rc; |
| 170 | u8 level; |
| 171 | u16 reg_addr; |
| 172 | |
| 173 | level = (value << PM8XXX_DRV_FLASH_SHIFT) & |
| 174 | PM8XXX_DRV_FLASH_MASK; |
| 175 | |
| 176 | led->reg &= ~PM8XXX_DRV_FLASH_MASK; |
| 177 | led->reg |= level; |
| 178 | |
| 179 | if (led->id == PM8XXX_ID_FLASH_LED_0) |
| 180 | reg_addr = SSBI_REG_ADDR_FLASH_DRV0; |
| 181 | else |
| 182 | reg_addr = SSBI_REG_ADDR_FLASH_DRV1; |
| 183 | |
| 184 | rc = pm8xxx_writeb(led->dev->parent, reg_addr, led->reg); |
| 185 | if (rc < 0) |
| 186 | dev_err(led->cdev.dev, "can't set flash led%d level rc=%d\n", |
| 187 | led->id, rc); |
| 188 | } |
| 189 | |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 190 | static int |
| 191 | led_wled_set(struct pm8xxx_led_data *led, enum led_brightness value) |
| 192 | { |
| 193 | int rc, duty; |
| 194 | u8 val, i, num_wled_strings; |
| 195 | |
| 196 | if (value > WLED_MAX_LEVEL) |
| 197 | value = WLED_MAX_LEVEL; |
| 198 | |
| 199 | duty = (WLED_MAX_DUTY_CYCLE * value) / WLED_MAX_LEVEL; |
| 200 | |
| 201 | num_wled_strings = led->wled_cfg->num_strings; |
| 202 | |
| 203 | /* program brightness control registers */ |
| 204 | for (i = 0; i < num_wled_strings; i++) { |
| 205 | rc = pm8xxx_readb(led->dev->parent, |
| 206 | WLED_BRIGHTNESS_CNTL_REG1(i), &val); |
| 207 | if (rc) { |
| 208 | dev_err(led->dev->parent, "can't read wled brightnes ctrl" |
| 209 | " register1 rc=%d\n", rc); |
| 210 | return rc; |
| 211 | } |
| 212 | |
| 213 | val = (val & ~WLED_MAX_CURR_MASK) | (duty >> WLED_8_BIT_SHFT); |
| 214 | rc = pm8xxx_writeb(led->dev->parent, |
| 215 | WLED_BRIGHTNESS_CNTL_REG1(i), val); |
| 216 | if (rc) { |
| 217 | dev_err(led->dev->parent, "can't write wled brightness ctrl" |
| 218 | " register1 rc=%d\n", rc); |
| 219 | return rc; |
| 220 | } |
| 221 | |
| 222 | val = duty & WLED_8_BIT_MASK; |
| 223 | rc = pm8xxx_writeb(led->dev->parent, |
| 224 | WLED_BRIGHTNESS_CNTL_REG2(i), val); |
| 225 | if (rc) { |
| 226 | dev_err(led->dev->parent, "can't write wled brightness ctrl" |
| 227 | " register2 rc=%d\n", rc); |
| 228 | return rc; |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | /* sync */ |
| 233 | val = WLED_SYNC_VAL; |
| 234 | rc = pm8xxx_writeb(led->dev->parent, WLED_SYNC_REG, val); |
| 235 | if (rc) { |
| 236 | dev_err(led->dev->parent, |
| 237 | "can't read wled sync register rc=%d\n", rc); |
| 238 | return rc; |
| 239 | } |
| 240 | |
| 241 | val = WLED_SYNC_RESET_VAL; |
| 242 | rc = pm8xxx_writeb(led->dev->parent, WLED_SYNC_REG, val); |
| 243 | if (rc) { |
| 244 | dev_err(led->dev->parent, |
| 245 | "can't read wled sync register rc=%d\n", rc); |
| 246 | return rc; |
| 247 | } |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | static void wled_dump_regs(struct pm8xxx_led_data *led) |
| 252 | { |
| 253 | int i; |
| 254 | u8 val; |
| 255 | |
| 256 | for (i = 1; i < 17; i++) { |
| 257 | pm8xxx_readb(led->dev->parent, |
| 258 | SSBI_REG_ADDR_WLED_CTRL(i), &val); |
| 259 | pr_debug("WLED_CTRL_%d = 0x%x\n", i, val); |
| 260 | } |
| 261 | } |
| 262 | |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 263 | static int pm8xxx_led_pwm_work(struct pm8xxx_led_data *led) |
| 264 | { |
| 265 | int duty_us; |
| 266 | int rc = 0; |
| 267 | |
| 268 | if (led->pwm_duty_cycles == NULL) { |
| 269 | duty_us = (led->pwm_period_us * led->cdev.brightness) / |
| 270 | LED_FULL; |
| 271 | rc = pwm_config(led->pwm_dev, duty_us, led->pwm_period_us); |
| 272 | if (led->cdev.brightness) |
| 273 | rc = pwm_enable(led->pwm_dev); |
| 274 | else |
| 275 | pwm_disable(led->pwm_dev); |
| 276 | } else { |
| 277 | rc = pm8xxx_pwm_lut_enable(led->pwm_dev, led->cdev.brightness); |
| 278 | } |
| 279 | |
| 280 | return rc; |
| 281 | } |
| 282 | |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 283 | static void __pm8xxx_led_work(struct pm8xxx_led_data *led, |
| 284 | enum led_brightness level) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 285 | { |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 286 | int rc; |
| 287 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 288 | mutex_lock(&led->lock); |
| 289 | |
| 290 | switch (led->id) { |
| 291 | case PM8XXX_ID_LED_KB_LIGHT: |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 292 | led_kp_set(led, level); |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 293 | break; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 294 | case PM8XXX_ID_LED_0: |
| 295 | case PM8XXX_ID_LED_1: |
| 296 | case PM8XXX_ID_LED_2: |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 297 | led_lc_set(led, level); |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 298 | break; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 299 | case PM8XXX_ID_FLASH_LED_0: |
| 300 | case PM8XXX_ID_FLASH_LED_1: |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 301 | led_flash_set(led, level); |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 302 | break; |
| 303 | case PM8XXX_ID_WLED: |
| 304 | rc = led_wled_set(led, level); |
| 305 | if (rc < 0) |
| 306 | pr_err("wled brightness set failed %d\n", rc); |
| 307 | break; |
| 308 | default: |
| 309 | dev_err(led->cdev.dev, "unknown led id %d", led->id); |
| 310 | break; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | mutex_unlock(&led->lock); |
| 314 | } |
| 315 | |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 316 | static void pm8xxx_led_work(struct work_struct *work) |
| 317 | { |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 318 | int rc; |
| 319 | |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 320 | struct pm8xxx_led_data *led = container_of(work, |
| 321 | struct pm8xxx_led_data, work); |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 322 | |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 323 | if (led->pwm_dev == NULL) { |
| 324 | __pm8xxx_led_work(led, led->cdev.brightness); |
| 325 | } else { |
| 326 | rc = pm8xxx_led_pwm_work(led); |
| 327 | if (rc) |
| 328 | pr_err("could not configure PWM mode for LED:%d\n", |
| 329 | led->id); |
| 330 | } |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 331 | } |
| 332 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 333 | static void pm8xxx_led_set(struct led_classdev *led_cdev, |
| 334 | enum led_brightness value) |
| 335 | { |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 336 | struct pm8xxx_led_data *led; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 337 | |
| 338 | led = container_of(led_cdev, struct pm8xxx_led_data, cdev); |
| 339 | |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 340 | if (value < LED_OFF || value > led->cdev.max_brightness) { |
| 341 | dev_err(led->cdev.dev, "Invalid brightness value exceeds"); |
| 342 | return; |
| 343 | } |
| 344 | |
| 345 | led->cdev.brightness = value; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 346 | schedule_work(&led->work); |
| 347 | } |
| 348 | |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 349 | static int pm8xxx_set_led_mode_and_max_brightness(struct pm8xxx_led_data *led, |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 350 | enum pm8xxx_led_modes led_mode, int max_current) |
| 351 | { |
| 352 | int rc = 0; |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 353 | |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 354 | switch (led->id) { |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 355 | case PM8XXX_ID_LED_0: |
| 356 | case PM8XXX_ID_LED_1: |
| 357 | case PM8XXX_ID_LED_2: |
| 358 | led->cdev.max_brightness = max_current / |
| 359 | PM8XXX_ID_LED_CURRENT_FACTOR; |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 360 | if (led->cdev.max_brightness > MAX_LC_LED_BRIGHTNESS) |
| 361 | led->cdev.max_brightness = MAX_LC_LED_BRIGHTNESS; |
Willie Ruan | a39d1d4 | 2011-08-19 13:54:34 -0700 | [diff] [blame] | 362 | led->reg = led_mode; |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 363 | break; |
| 364 | case PM8XXX_ID_LED_KB_LIGHT: |
| 365 | case PM8XXX_ID_FLASH_LED_0: |
| 366 | case PM8XXX_ID_FLASH_LED_1: |
| 367 | led->cdev.max_brightness = max_current / |
| 368 | PM8XXX_ID_FLASH_CURRENT_FACTOR; |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 369 | if (led->cdev.max_brightness > MAX_FLASH_BRIGHTNESS) |
| 370 | led->cdev.max_brightness = MAX_FLASH_BRIGHTNESS; |
| 371 | |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 372 | switch (led_mode) { |
| 373 | case PM8XXX_LED_MODE_PWM1: |
| 374 | case PM8XXX_LED_MODE_PWM2: |
| 375 | case PM8XXX_LED_MODE_PWM3: |
Willie Ruan | a39d1d4 | 2011-08-19 13:54:34 -0700 | [diff] [blame] | 376 | led->reg = PM8XXX_FLASH_MODE_PWM; |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 377 | break; |
| 378 | case PM8XXX_LED_MODE_DTEST1: |
Willie Ruan | a39d1d4 | 2011-08-19 13:54:34 -0700 | [diff] [blame] | 379 | led->reg = PM8XXX_FLASH_MODE_DBUS1; |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 380 | break; |
| 381 | case PM8XXX_LED_MODE_DTEST2: |
Willie Ruan | a39d1d4 | 2011-08-19 13:54:34 -0700 | [diff] [blame] | 382 | led->reg = PM8XXX_FLASH_MODE_DBUS2; |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 383 | break; |
| 384 | default: |
Willie Ruan | a39d1d4 | 2011-08-19 13:54:34 -0700 | [diff] [blame] | 385 | led->reg = PM8XXX_LED_MODE_MANUAL; |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 386 | break; |
| 387 | } |
| 388 | break; |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 389 | case PM8XXX_ID_WLED: |
| 390 | led->cdev.max_brightness = WLED_MAX_LEVEL; |
| 391 | break; |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 392 | default: |
| 393 | rc = -EINVAL; |
| 394 | pr_err("LED Id is invalid"); |
| 395 | break; |
| 396 | } |
| 397 | |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 398 | return rc; |
| 399 | } |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 400 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 401 | static enum led_brightness pm8xxx_led_get(struct led_classdev *led_cdev) |
| 402 | { |
| 403 | struct pm8xxx_led_data *led; |
| 404 | |
| 405 | led = container_of(led_cdev, struct pm8xxx_led_data, cdev); |
| 406 | |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 407 | return led->cdev.brightness; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 408 | } |
| 409 | |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 410 | static int __devinit init_wled(struct pm8xxx_led_data *led) |
| 411 | { |
| 412 | int rc, i; |
| 413 | u8 val, num_wled_strings; |
| 414 | |
| 415 | num_wled_strings = led->wled_cfg->num_strings; |
| 416 | |
| 417 | /* program over voltage protection threshold */ |
| 418 | if (led->wled_cfg->ovp_val > WLED_OVP_37V) { |
| 419 | dev_err(led->dev->parent, "Invalid ovp value"); |
| 420 | return -EINVAL; |
| 421 | } |
| 422 | |
| 423 | rc = pm8xxx_readb(led->dev->parent, WLED_OVP_CFG_REG, &val); |
| 424 | if (rc) { |
| 425 | dev_err(led->dev->parent, "can't read wled ovp config" |
| 426 | " register rc=%d\n", rc); |
| 427 | return rc; |
| 428 | } |
| 429 | |
| 430 | val = (val & ~WLED_OVP_VAL_MASK) | |
| 431 | (led->wled_cfg->ovp_val << WLED_OVP_VAL_BIT_SHFT); |
| 432 | |
| 433 | rc = pm8xxx_writeb(led->dev->parent, WLED_OVP_CFG_REG, val); |
| 434 | if (rc) { |
| 435 | dev_err(led->dev->parent, "can't write wled ovp config" |
| 436 | " register rc=%d\n", rc); |
| 437 | return rc; |
| 438 | } |
| 439 | |
| 440 | /* program current boost limit and output feedback*/ |
| 441 | if (led->wled_cfg->boost_curr_lim > WLED_CURR_LIMIT_1680mA) { |
| 442 | dev_err(led->dev->parent, "Invalid boost current limit"); |
| 443 | return -EINVAL; |
| 444 | } |
| 445 | |
| 446 | rc = pm8xxx_readb(led->dev->parent, WLED_BOOST_CFG_REG, &val); |
| 447 | if (rc) { |
| 448 | dev_err(led->dev->parent, "can't read wled boost config" |
| 449 | " register rc=%d\n", rc); |
| 450 | return rc; |
| 451 | } |
| 452 | |
| 453 | val = (val & ~WLED_BOOST_LIMIT_MASK) | |
| 454 | (led->wled_cfg->boost_curr_lim << WLED_BOOST_LIMIT_BIT_SHFT); |
| 455 | |
| 456 | val = (val & ~WLED_OP_FDBCK_MASK) | |
| 457 | (led->wled_cfg->op_fdbck << WLED_OP_FDBCK_BIT_SHFT); |
| 458 | |
| 459 | rc = pm8xxx_writeb(led->dev->parent, WLED_BOOST_CFG_REG, val); |
| 460 | if (rc) { |
| 461 | dev_err(led->dev->parent, "can't write wled boost config" |
| 462 | " register rc=%d\n", rc); |
| 463 | return rc; |
| 464 | } |
| 465 | |
| 466 | /* program high pole capacitance */ |
| 467 | if (led->wled_cfg->cp_select > WLED_CP_SELECT_MAX) { |
| 468 | dev_err(led->dev->parent, "Invalid pole capacitance"); |
| 469 | return -EINVAL; |
| 470 | } |
| 471 | |
| 472 | rc = pm8xxx_readb(led->dev->parent, WLED_HIGH_POLE_CAP_REG, &val); |
| 473 | if (rc) { |
| 474 | dev_err(led->dev->parent, "can't read wled high pole" |
| 475 | " capacitance register rc=%d\n", rc); |
| 476 | return rc; |
| 477 | } |
| 478 | |
| 479 | val = (val & ~WLED_CP_SELECT_MASK) | led->wled_cfg->cp_select; |
| 480 | |
| 481 | rc = pm8xxx_writeb(led->dev->parent, WLED_HIGH_POLE_CAP_REG, val); |
| 482 | if (rc) { |
| 483 | dev_err(led->dev->parent, "can't write wled high pole" |
| 484 | " capacitance register rc=%d\n", rc); |
| 485 | return rc; |
| 486 | } |
| 487 | |
| 488 | /* program activation delay and maximum current */ |
| 489 | for (i = 0; i < num_wled_strings; i++) { |
| 490 | rc = pm8xxx_readb(led->dev->parent, |
| 491 | WLED_MAX_CURR_CFG_REG(i + 2), &val); |
| 492 | if (rc) { |
| 493 | dev_err(led->dev->parent, "can't read wled max current" |
| 494 | " config register rc=%d\n", rc); |
| 495 | return rc; |
| 496 | } |
| 497 | |
| 498 | if ((led->wled_cfg->ctrl_delay_us % WLED_CTL_DLY_STEP) || |
| 499 | (led->wled_cfg->ctrl_delay_us > WLED_CTL_DLY_MAX)) { |
| 500 | dev_err(led->dev->parent, "Invalid control delay\n"); |
| 501 | return rc; |
| 502 | } |
| 503 | |
| 504 | val = val / WLED_CTL_DLY_STEP; |
| 505 | val = (val & ~WLED_CTL_DLY_MASK) | |
| 506 | (led->wled_cfg->ctrl_delay_us << WLED_CTL_DLY_BIT_SHFT); |
| 507 | |
| 508 | if ((led->max_current > WLED_MAX_CURR)) { |
| 509 | dev_err(led->dev->parent, "Invalid max current\n"); |
| 510 | return -EINVAL; |
| 511 | } |
| 512 | |
| 513 | val = (val & ~WLED_MAX_CURR_MASK) | led->max_current; |
| 514 | |
| 515 | rc = pm8xxx_writeb(led->dev->parent, |
| 516 | WLED_MAX_CURR_CFG_REG(i + 2), val); |
| 517 | if (rc) { |
| 518 | dev_err(led->dev->parent, "can't write wled max current" |
| 519 | " config register rc=%d\n", rc); |
| 520 | return rc; |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | /* program digital module generator, cs out and enable the module */ |
| 525 | rc = pm8xxx_readb(led->dev->parent, WLED_MOD_CTRL_REG, &val); |
| 526 | if (rc) { |
| 527 | dev_err(led->dev->parent, "can't read wled module ctrl" |
| 528 | " register rc=%d\n", rc); |
| 529 | return rc; |
| 530 | } |
| 531 | |
| 532 | if (led->wled_cfg->dig_mod_gen_en) |
| 533 | val |= WLED_DIG_MOD_GEN_MASK; |
| 534 | |
| 535 | if (led->wled_cfg->cs_out_en) |
| 536 | val |= WLED_CS_OUT_MASK; |
| 537 | |
| 538 | val |= WLED_EN_MASK; |
| 539 | |
| 540 | rc = pm8xxx_writeb(led->dev->parent, WLED_MOD_CTRL_REG, val); |
| 541 | if (rc) { |
| 542 | dev_err(led->dev->parent, "can't write wled module ctrl" |
| 543 | " register rc=%d\n", rc); |
| 544 | return rc; |
| 545 | } |
| 546 | |
| 547 | /* dump wled registers */ |
| 548 | wled_dump_regs(led); |
| 549 | |
| 550 | return 0; |
| 551 | } |
| 552 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 553 | static int __devinit get_init_value(struct pm8xxx_led_data *led, u8 *val) |
| 554 | { |
| 555 | int rc, offset; |
| 556 | u16 addr; |
| 557 | |
| 558 | switch (led->id) { |
| 559 | case PM8XXX_ID_LED_KB_LIGHT: |
| 560 | addr = SSBI_REG_ADDR_DRV_KEYPAD; |
| 561 | break; |
| 562 | case PM8XXX_ID_LED_0: |
| 563 | case PM8XXX_ID_LED_1: |
| 564 | case PM8XXX_ID_LED_2: |
| 565 | offset = PM8XXX_LED_OFFSET(led->id); |
| 566 | addr = SSBI_REG_ADDR_LED_CTRL(offset); |
| 567 | break; |
| 568 | case PM8XXX_ID_FLASH_LED_0: |
| 569 | addr = SSBI_REG_ADDR_FLASH_DRV0; |
| 570 | break; |
| 571 | case PM8XXX_ID_FLASH_LED_1: |
| 572 | addr = SSBI_REG_ADDR_FLASH_DRV1; |
| 573 | break; |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 574 | case PM8XXX_ID_WLED: |
| 575 | rc = init_wled(led); |
| 576 | if (rc) |
| 577 | dev_err(led->cdev.dev, "can't initialize wled rc=%d\n", |
| 578 | rc); |
| 579 | return rc; |
| 580 | default: |
| 581 | dev_err(led->cdev.dev, "unknown led id %d", led->id); |
| 582 | return -EINVAL; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | rc = pm8xxx_readb(led->dev->parent, addr, val); |
| 586 | if (rc) |
| 587 | dev_err(led->cdev.dev, "can't get led(%d) level rc=%d\n", |
| 588 | led->id, rc); |
| 589 | |
| 590 | return rc; |
| 591 | } |
| 592 | |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 593 | static int pm8xxx_led_pwm_configure(struct pm8xxx_led_data *led) |
| 594 | { |
| 595 | int start_idx, idx_len, duty_us, rc; |
| 596 | |
| 597 | led->pwm_dev = pwm_request(led->pwm_channel, |
| 598 | led->cdev.name); |
| 599 | |
| 600 | if (IS_ERR_OR_NULL(led->pwm_dev)) { |
| 601 | pr_err("could not acquire PWM Channel %d, " |
| 602 | "error %ld\n", led->pwm_channel, |
| 603 | PTR_ERR(led->pwm_dev)); |
| 604 | led->pwm_dev = NULL; |
| 605 | return -ENODEV; |
| 606 | } |
| 607 | |
| 608 | if (led->pwm_duty_cycles != NULL) { |
| 609 | start_idx = led->pwm_duty_cycles->start_idx; |
| 610 | idx_len = led->pwm_duty_cycles->num_duty_pcts; |
| 611 | |
| 612 | if (idx_len >= PM_PWM_LUT_SIZE && start_idx) { |
| 613 | pr_err("Wrong LUT size or index\n"); |
| 614 | return -EINVAL; |
| 615 | } |
| 616 | if ((start_idx + idx_len) > PM_PWM_LUT_SIZE) { |
| 617 | pr_err("Exceed LUT limit\n"); |
| 618 | return -EINVAL; |
| 619 | } |
| 620 | |
| 621 | rc = pm8xxx_pwm_lut_config(led->pwm_dev, led->pwm_period_us, |
| 622 | led->pwm_duty_cycles->duty_pcts, |
| 623 | led->pwm_duty_cycles->duty_ms, |
| 624 | start_idx, idx_len, 0, 0, |
| 625 | PM8XXX_LED_PWM_FLAGS); |
| 626 | } else { |
| 627 | duty_us = led->pwm_period_us; |
| 628 | rc = pwm_config(led->pwm_dev, duty_us, led->pwm_period_us); |
| 629 | } |
| 630 | |
| 631 | return rc; |
| 632 | } |
| 633 | |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 634 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 635 | static int __devinit pm8xxx_led_probe(struct platform_device *pdev) |
| 636 | { |
Jay Chokshi | 8994e39 | 2011-09-14 18:20:39 -0700 | [diff] [blame] | 637 | const struct pm8xxx_led_platform_data *pdata = pdev->dev.platform_data; |
| 638 | const struct led_platform_data *pcore_data; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 639 | struct led_info *curr_led; |
| 640 | struct pm8xxx_led_data *led, *led_dat; |
Jay Chokshi | 8994e39 | 2011-09-14 18:20:39 -0700 | [diff] [blame] | 641 | struct pm8xxx_led_config *led_cfg; |
| 642 | int rc, i; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 643 | |
| 644 | if (pdata == NULL) { |
| 645 | dev_err(&pdev->dev, "platform data not supplied\n"); |
| 646 | return -EINVAL; |
| 647 | } |
| 648 | |
Jay Chokshi | 8994e39 | 2011-09-14 18:20:39 -0700 | [diff] [blame] | 649 | pcore_data = pdata->led_core; |
| 650 | |
| 651 | if (pcore_data->num_leds != pdata->num_configs) { |
| 652 | dev_err(&pdev->dev, "#no. of led configs and #no. of led" |
| 653 | "entries are not equal\n"); |
| 654 | return -EINVAL; |
| 655 | } |
| 656 | |
| 657 | led = kcalloc(pcore_data->num_leds, sizeof(*led), GFP_KERNEL); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 658 | if (led == NULL) { |
| 659 | dev_err(&pdev->dev, "failed to alloc memory\n"); |
| 660 | return -ENOMEM; |
| 661 | } |
| 662 | |
Jay Chokshi | 8994e39 | 2011-09-14 18:20:39 -0700 | [diff] [blame] | 663 | for (i = 0; i < pcore_data->num_leds; i++) { |
| 664 | curr_led = &pcore_data->leds[i]; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 665 | led_dat = &led[i]; |
Jay Chokshi | 8994e39 | 2011-09-14 18:20:39 -0700 | [diff] [blame] | 666 | led_cfg = &pdata->configs[i]; |
| 667 | |
| 668 | led_dat->id = led_cfg->id; |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 669 | led_dat->pwm_channel = led_cfg->pwm_channel; |
| 670 | led_dat->pwm_period_us = led_cfg->pwm_period_us; |
| 671 | led_dat->pwm_duty_cycles = led_cfg->pwm_duty_cycles; |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 672 | led_dat->wled_cfg = led_cfg->wled_cfg; |
| 673 | led_dat->max_current = led_cfg->max_current; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 674 | |
| 675 | if (!((led_dat->id >= PM8XXX_ID_LED_KB_LIGHT) && |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 676 | (led_dat->id < PM8XXX_ID_MAX))) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 677 | dev_err(&pdev->dev, "invalid LED ID (%d) specified\n", |
| 678 | led_dat->id); |
| 679 | rc = -EINVAL; |
| 680 | goto fail_id_check; |
| 681 | } |
| 682 | |
| 683 | led_dat->cdev.name = curr_led->name; |
| 684 | led_dat->cdev.default_trigger = curr_led->default_trigger; |
| 685 | led_dat->cdev.brightness_set = pm8xxx_led_set; |
| 686 | led_dat->cdev.brightness_get = pm8xxx_led_get; |
| 687 | led_dat->cdev.brightness = LED_OFF; |
Jay Chokshi | 8994e39 | 2011-09-14 18:20:39 -0700 | [diff] [blame] | 688 | led_dat->cdev.flags = curr_led->flags; |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 689 | led_dat->dev = &pdev->dev; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 690 | |
| 691 | rc = get_init_value(led_dat, &led_dat->reg); |
| 692 | if (rc < 0) |
| 693 | goto fail_id_check; |
| 694 | |
Jay Chokshi | 8994e39 | 2011-09-14 18:20:39 -0700 | [diff] [blame] | 695 | rc = pm8xxx_set_led_mode_and_max_brightness(led_dat, |
| 696 | led_cfg->mode, led_cfg->max_current); |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 697 | if (rc < 0) |
| 698 | goto fail_id_check; |
| 699 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 700 | mutex_init(&led_dat->lock); |
| 701 | INIT_WORK(&led_dat->work, pm8xxx_led_work); |
| 702 | |
| 703 | rc = led_classdev_register(&pdev->dev, &led_dat->cdev); |
| 704 | if (rc) { |
| 705 | dev_err(&pdev->dev, "unable to register led %d,rc=%d\n", |
| 706 | led_dat->id, rc); |
| 707 | goto fail_id_check; |
| 708 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 709 | |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 710 | /* configure default state */ |
| 711 | if (led_cfg->default_state) |
| 712 | led->cdev.brightness = led_dat->cdev.max_brightness; |
| 713 | else |
| 714 | led->cdev.brightness = LED_OFF; |
| 715 | |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 716 | if (led_cfg->mode != PM8XXX_LED_MODE_MANUAL) { |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 717 | __pm8xxx_led_work(led_dat, |
| 718 | led_dat->cdev.max_brightness); |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 719 | |
| 720 | if (led_dat->pwm_channel != -1) { |
| 721 | led_dat->cdev.max_brightness = LED_FULL; |
| 722 | rc = pm8xxx_led_pwm_configure(led_dat); |
| 723 | if (rc) { |
| 724 | dev_err(&pdev->dev, "failed to " |
| 725 | "configure LED, error: %d\n", rc); |
| 726 | goto fail_id_check; |
| 727 | } |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 728 | schedule_work(&led->work); |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 729 | } |
| 730 | } else { |
Mohan Pallaka | 53fe1a1 | 2011-12-15 16:56:37 +0530 | [diff] [blame^] | 731 | __pm8xxx_led_work(led_dat, led->cdev.brightness); |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 732 | } |
Jay Chokshi | de4cefb | 2011-08-04 18:10:44 -0700 | [diff] [blame] | 733 | } |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 734 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 735 | platform_set_drvdata(pdev, led); |
| 736 | |
| 737 | return 0; |
| 738 | |
| 739 | fail_id_check: |
| 740 | if (i > 0) { |
| 741 | for (i = i - 1; i >= 0; i--) { |
| 742 | mutex_destroy(&led[i].lock); |
| 743 | led_classdev_unregister(&led[i].cdev); |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 744 | if (led[i].pwm_dev != NULL) |
| 745 | pwm_free(led[i].pwm_dev); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 746 | } |
| 747 | } |
| 748 | kfree(led); |
| 749 | return rc; |
| 750 | } |
| 751 | |
| 752 | static int __devexit pm8xxx_led_remove(struct platform_device *pdev) |
| 753 | { |
| 754 | int i; |
| 755 | const struct led_platform_data *pdata = |
| 756 | pdev->dev.platform_data; |
| 757 | struct pm8xxx_led_data *led = platform_get_drvdata(pdev); |
| 758 | |
| 759 | for (i = 0; i < pdata->num_leds; i++) { |
| 760 | cancel_work_sync(&led[i].work); |
| 761 | mutex_destroy(&led[i].lock); |
| 762 | led_classdev_unregister(&led[i].cdev); |
Jay Chokshi | 868312e | 2011-09-16 13:57:13 -0700 | [diff] [blame] | 763 | if (led[i].pwm_dev != NULL) |
| 764 | pwm_free(led[i].pwm_dev); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | kfree(led); |
| 768 | |
| 769 | return 0; |
| 770 | } |
| 771 | |
| 772 | static struct platform_driver pm8xxx_led_driver = { |
| 773 | .probe = pm8xxx_led_probe, |
| 774 | .remove = __devexit_p(pm8xxx_led_remove), |
| 775 | .driver = { |
| 776 | .name = PM8XXX_LEDS_DEV_NAME, |
| 777 | .owner = THIS_MODULE, |
| 778 | }, |
| 779 | }; |
| 780 | |
| 781 | static int __init pm8xxx_led_init(void) |
| 782 | { |
| 783 | return platform_driver_register(&pm8xxx_led_driver); |
| 784 | } |
Jay Chokshi | 12e49bf | 2011-07-22 16:24:39 -0700 | [diff] [blame] | 785 | subsys_initcall(pm8xxx_led_init); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 786 | |
| 787 | static void __exit pm8xxx_led_exit(void) |
| 788 | { |
| 789 | platform_driver_unregister(&pm8xxx_led_driver); |
| 790 | } |
| 791 | module_exit(pm8xxx_led_exit); |
| 792 | |
| 793 | MODULE_DESCRIPTION("PM8XXX LEDs driver"); |
| 794 | MODULE_LICENSE("GPL v2"); |
| 795 | MODULE_VERSION("1.0"); |
| 796 | MODULE_ALIAS("platform:pm8xxx-led"); |