| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * lp5523.c - LP5523, LP55231 LED Driver |
| * |
| * Copyright (C) 2010 Nokia Corporation |
| * Copyright (C) 2012 Texas Instruments |
| * |
| * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> |
| * Milo(Woogyom) Kim <milo.kim@ti.com> |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/firmware.h> |
| #include <linux/i2c.h> |
| #include <linux/leds.h> |
| #include <linux/module.h> |
| #include <linux/mutex.h> |
| #include <linux/of.h> |
| #include <linux/platform_data/leds-lp55xx.h> |
| #include <linux/slab.h> |
| |
| #include "leds-lp55xx-common.h" |
| |
| #define LP5523_PROGRAM_LENGTH 32 /* bytes */ |
| /* Memory is used like this: |
| * 0x00 engine 1 program |
| * 0x10 engine 2 program |
| * 0x20 engine 3 program |
| * 0x30 engine 1 muxing info |
| * 0x40 engine 2 muxing info |
| * 0x50 engine 3 muxing info |
| */ |
| #define LP5523_MAX_LEDS 9 |
| |
| /* Registers */ |
| #define LP5523_REG_ENABLE 0x00 |
| #define LP5523_REG_OP_MODE 0x01 |
| #define LP5523_REG_ENABLE_LEDS_MSB 0x04 |
| #define LP5523_REG_ENABLE_LEDS_LSB 0x05 |
| #define LP5523_REG_LED_CTRL_BASE 0x06 |
| #define LP5523_REG_LED_PWM_BASE 0x16 |
| #define LP5523_REG_LED_CURRENT_BASE 0x26 |
| #define LP5523_REG_CONFIG 0x36 |
| #define LP5523_REG_STATUS 0x3A |
| #define LP5523_REG_RESET 0x3D |
| #define LP5523_REG_LED_TEST_CTRL 0x41 |
| #define LP5523_REG_LED_TEST_ADC 0x42 |
| #define LP5523_REG_MASTER_FADER_BASE 0x48 |
| #define LP5523_REG_CH1_PROG_START 0x4C |
| #define LP5523_REG_CH2_PROG_START 0x4D |
| #define LP5523_REG_CH3_PROG_START 0x4E |
| #define LP5523_REG_PROG_PAGE_SEL 0x4F |
| #define LP5523_REG_PROG_MEM 0x50 |
| |
| /* Bit description in registers */ |
| #define LP5523_ENABLE 0x40 |
| #define LP5523_AUTO_INC 0x40 |
| #define LP5523_PWR_SAVE 0x20 |
| #define LP5523_PWM_PWR_SAVE 0x04 |
| #define LP5523_CP_AUTO 0x18 |
| #define LP5523_AUTO_CLK 0x02 |
| |
| #define LP5523_EN_LEDTEST 0x80 |
| #define LP5523_LEDTEST_DONE 0x80 |
| #define LP5523_RESET 0xFF |
| #define LP5523_ADC_SHORTCIRC_LIM 80 |
| #define LP5523_EXT_CLK_USED 0x08 |
| #define LP5523_ENG_STATUS_MASK 0x07 |
| |
| #define LP5523_FADER_MAPPING_MASK 0xC0 |
| #define LP5523_FADER_MAPPING_SHIFT 6 |
| |
| /* Memory Page Selection */ |
| #define LP5523_PAGE_ENG1 0 |
| #define LP5523_PAGE_ENG2 1 |
| #define LP5523_PAGE_ENG3 2 |
| #define LP5523_PAGE_MUX1 3 |
| #define LP5523_PAGE_MUX2 4 |
| #define LP5523_PAGE_MUX3 5 |
| |
| /* Program Memory Operations */ |
| #define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */ |
| #define LP5523_MODE_ENG2_M 0x0C |
| #define LP5523_MODE_ENG3_M 0x03 |
| #define LP5523_LOAD_ENG1 0x10 |
| #define LP5523_LOAD_ENG2 0x04 |
| #define LP5523_LOAD_ENG3 0x01 |
| |
| #define LP5523_ENG1_IS_LOADING(mode) \ |
| ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1) |
| #define LP5523_ENG2_IS_LOADING(mode) \ |
| ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2) |
| #define LP5523_ENG3_IS_LOADING(mode) \ |
| ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3) |
| |
| #define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */ |
| #define LP5523_EXEC_ENG2_M 0x0C |
| #define LP5523_EXEC_ENG3_M 0x03 |
| #define LP5523_EXEC_M 0x3F |
| #define LP5523_RUN_ENG1 0x20 |
| #define LP5523_RUN_ENG2 0x08 |
| #define LP5523_RUN_ENG3 0x02 |
| |
| #define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led))) |
| |
| enum lp5523_chip_id { |
| LP5523, |
| LP55231, |
| }; |
| |
| static int lp5523_init_program_engine(struct lp55xx_chip *chip); |
| |
| static inline void lp5523_wait_opmode_done(void) |
| { |
| usleep_range(1000, 2000); |
| } |
| |
| static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current) |
| { |
| led->led_current = led_current; |
| lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, |
| led_current); |
| } |
| |
| static int lp5523_post_init_device(struct lp55xx_chip *chip) |
| { |
| int ret; |
| |
| ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE); |
| if (ret) |
| return ret; |
| |
| /* Chip startup time is 500 us, 1 - 2 ms gives some margin */ |
| usleep_range(1000, 2000); |
| |
| ret = lp55xx_write(chip, LP5523_REG_CONFIG, |
| LP5523_AUTO_INC | LP5523_PWR_SAVE | |
| LP5523_CP_AUTO | LP5523_AUTO_CLK | |
| LP5523_PWM_PWR_SAVE); |
| if (ret) |
| return ret; |
| |
| /* turn on all leds */ |
| ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01); |
| if (ret) |
| return ret; |
| |
| ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff); |
| if (ret) |
| return ret; |
| |
| return lp5523_init_program_engine(chip); |
| } |
| |
| static void lp5523_load_engine(struct lp55xx_chip *chip) |
| { |
| enum lp55xx_engine_index idx = chip->engine_idx; |
| static const u8 mask[] = { |
| [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, |
| [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, |
| [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, |
| }; |
| |
| static const u8 val[] = { |
| [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1, |
| [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2, |
| [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3, |
| }; |
| |
| lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]); |
| |
| lp5523_wait_opmode_done(); |
| } |
| |
| static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip) |
| { |
| enum lp55xx_engine_index idx = chip->engine_idx; |
| static const u8 page_sel[] = { |
| [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1, |
| [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2, |
| [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3, |
| }; |
| |
| lp5523_load_engine(chip); |
| |
| lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]); |
| } |
| |
| static void lp5523_stop_all_engines(struct lp55xx_chip *chip) |
| { |
| lp55xx_write(chip, LP5523_REG_OP_MODE, 0); |
| lp5523_wait_opmode_done(); |
| } |
| |
| static void lp5523_stop_engine(struct lp55xx_chip *chip) |
| { |
| enum lp55xx_engine_index idx = chip->engine_idx; |
| static const u8 mask[] = { |
| [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, |
| [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, |
| [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, |
| }; |
| |
| lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0); |
| |
| lp5523_wait_opmode_done(); |
| } |
| |
| static void lp5523_turn_off_channels(struct lp55xx_chip *chip) |
| { |
| int i; |
| |
| for (i = 0; i < LP5523_MAX_LEDS; i++) |
| lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0); |
| } |
| |
| static void lp5523_run_engine(struct lp55xx_chip *chip, bool start) |
| { |
| int ret; |
| u8 mode; |
| u8 exec; |
| |
| /* stop engine */ |
| if (!start) { |
| lp5523_stop_engine(chip); |
| lp5523_turn_off_channels(chip); |
| return; |
| } |
| |
| /* |
| * To run the engine, |
| * operation mode and enable register should updated at the same time |
| */ |
| |
| ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode); |
| if (ret) |
| return; |
| |
| ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec); |
| if (ret) |
| return; |
| |
| /* change operation mode to RUN only when each engine is loading */ |
| if (LP5523_ENG1_IS_LOADING(mode)) { |
| mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1; |
| exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1; |
| } |
| |
| if (LP5523_ENG2_IS_LOADING(mode)) { |
| mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2; |
| exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2; |
| } |
| |
| if (LP5523_ENG3_IS_LOADING(mode)) { |
| mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3; |
| exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3; |
| } |
| |
| lp55xx_write(chip, LP5523_REG_OP_MODE, mode); |
| lp5523_wait_opmode_done(); |
| |
| lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec); |
| } |
| |
| static int lp5523_init_program_engine(struct lp55xx_chip *chip) |
| { |
| int i; |
| int j; |
| int ret; |
| u8 status; |
| /* one pattern per engine setting LED MUX start and stop addresses */ |
| static const u8 pattern[][LP5523_PROGRAM_LENGTH] = { |
| { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0}, |
| { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0}, |
| { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, |
| }; |
| |
| /* hardcode 32 bytes of memory for each engine from program memory */ |
| ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00); |
| if (ret) |
| return ret; |
| |
| ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10); |
| if (ret) |
| return ret; |
| |
| ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20); |
| if (ret) |
| return ret; |
| |
| /* write LED MUX address space for each engine */ |
| for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { |
| chip->engine_idx = i; |
| lp5523_load_engine_and_select_page(chip); |
| |
| for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) { |
| ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j, |
| pattern[i - 1][j]); |
| if (ret) |
| goto out; |
| } |
| } |
| |
| lp5523_run_engine(chip, true); |
| |
| /* Let the programs run for couple of ms and check the engine status */ |
| usleep_range(3000, 6000); |
| ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
| if (ret) |
| goto out; |
| status &= LP5523_ENG_STATUS_MASK; |
| |
| if (status != LP5523_ENG_STATUS_MASK) { |
| dev_err(&chip->cl->dev, |
| "could not configure LED engine, status = 0x%.2x\n", |
| status); |
| ret = -1; |
| } |
| |
| out: |
| lp5523_stop_all_engines(chip); |
| return ret; |
| } |
| |
| static int lp5523_update_program_memory(struct lp55xx_chip *chip, |
| const u8 *data, size_t size) |
| { |
| u8 pattern[LP5523_PROGRAM_LENGTH] = {0}; |
| unsigned int cmd; |
| char c[3]; |
| int nrchars; |
| int ret; |
| int offset = 0; |
| int i = 0; |
| |
| while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) { |
| /* separate sscanfs because length is working only for %s */ |
| ret = sscanf(data + offset, "%2s%n ", c, &nrchars); |
| if (ret != 1) |
| goto err; |
| |
| ret = sscanf(c, "%2x", &cmd); |
| if (ret != 1) |
| goto err; |
| |
| pattern[i] = (u8)cmd; |
| offset += nrchars; |
| i++; |
| } |
| |
| /* Each instruction is 16bit long. Check that length is even */ |
| if (i % 2) |
| goto err; |
| |
| for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) { |
| ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]); |
| if (ret) |
| return -EINVAL; |
| } |
| |
| return size; |
| |
| err: |
| dev_err(&chip->cl->dev, "wrong pattern format\n"); |
| return -EINVAL; |
| } |
| |
| static void lp5523_firmware_loaded(struct lp55xx_chip *chip) |
| { |
| const struct firmware *fw = chip->fw; |
| |
| if (fw->size > LP5523_PROGRAM_LENGTH) { |
| dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", |
| fw->size); |
| return; |
| } |
| |
| /* |
| * Program memory sequence |
| * 1) set engine mode to "LOAD" |
| * 2) write firmware data into program memory |
| */ |
| |
| lp5523_load_engine_and_select_page(chip); |
| lp5523_update_program_memory(chip, fw->data, fw->size); |
| } |
| |
| static ssize_t show_engine_mode(struct device *dev, |
| struct device_attribute *attr, |
| char *buf, int nr) |
| { |
| struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| struct lp55xx_chip *chip = led->chip; |
| enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode; |
| |
| switch (mode) { |
| case LP55XX_ENGINE_RUN: |
| return sprintf(buf, "run\n"); |
| case LP55XX_ENGINE_LOAD: |
| return sprintf(buf, "load\n"); |
| case LP55XX_ENGINE_DISABLED: |
| default: |
| return sprintf(buf, "disabled\n"); |
| } |
| } |
| show_mode(1) |
| show_mode(2) |
| show_mode(3) |
| |
| static ssize_t store_engine_mode(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t len, int nr) |
| { |
| struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| struct lp55xx_chip *chip = led->chip; |
| struct lp55xx_engine *engine = &chip->engines[nr - 1]; |
| |
| mutex_lock(&chip->lock); |
| |
| chip->engine_idx = nr; |
| |
| if (!strncmp(buf, "run", 3)) { |
| lp5523_run_engine(chip, true); |
| engine->mode = LP55XX_ENGINE_RUN; |
| } else if (!strncmp(buf, "load", 4)) { |
| lp5523_stop_engine(chip); |
| lp5523_load_engine(chip); |
| engine->mode = LP55XX_ENGINE_LOAD; |
| } else if (!strncmp(buf, "disabled", 8)) { |
| lp5523_stop_engine(chip); |
| engine->mode = LP55XX_ENGINE_DISABLED; |
| } |
| |
| mutex_unlock(&chip->lock); |
| |
| return len; |
| } |
| store_mode(1) |
| store_mode(2) |
| store_mode(3) |
| |
| static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len) |
| { |
| u16 tmp_mux = 0; |
| int i; |
| |
| len = min_t(int, len, LP5523_MAX_LEDS); |
| |
| for (i = 0; i < len; i++) { |
| switch (buf[i]) { |
| case '1': |
| tmp_mux |= (1 << i); |
| break; |
| case '0': |
| break; |
| case '\n': |
| i = len; |
| break; |
| default: |
| return -1; |
| } |
| } |
| *mux = tmp_mux; |
| |
| return 0; |
| } |
| |
| static void lp5523_mux_to_array(u16 led_mux, char *array) |
| { |
| int i, pos = 0; |
| |
| for (i = 0; i < LP5523_MAX_LEDS; i++) |
| pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i)); |
| |
| array[pos] = '\0'; |
| } |
| |
| static ssize_t show_engine_leds(struct device *dev, |
| struct device_attribute *attr, |
| char *buf, int nr) |
| { |
| struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| struct lp55xx_chip *chip = led->chip; |
| char mux[LP5523_MAX_LEDS + 1]; |
| |
| lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux); |
| |
| return sprintf(buf, "%s\n", mux); |
| } |
| show_leds(1) |
| show_leds(2) |
| show_leds(3) |
| |
| static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr) |
| { |
| struct lp55xx_engine *engine = &chip->engines[nr - 1]; |
| int ret; |
| static const u8 mux_page[] = { |
| [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1, |
| [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2, |
| [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3, |
| }; |
| |
| lp5523_load_engine(chip); |
| |
| ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]); |
| if (ret) |
| return ret; |
| |
| ret = lp55xx_write(chip, LP5523_REG_PROG_MEM, (u8)(mux >> 8)); |
| if (ret) |
| return ret; |
| |
| ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux)); |
| if (ret) |
| return ret; |
| |
| engine->led_mux = mux; |
| return 0; |
| } |
| |
| static ssize_t store_engine_leds(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t len, int nr) |
| { |
| struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| struct lp55xx_chip *chip = led->chip; |
| struct lp55xx_engine *engine = &chip->engines[nr - 1]; |
| u16 mux = 0; |
| ssize_t ret; |
| |
| if (lp5523_mux_parse(buf, &mux, len)) |
| return -EINVAL; |
| |
| mutex_lock(&chip->lock); |
| |
| chip->engine_idx = nr; |
| ret = -EINVAL; |
| |
| if (engine->mode != LP55XX_ENGINE_LOAD) |
| goto leave; |
| |
| if (lp5523_load_mux(chip, mux, nr)) |
| goto leave; |
| |
| ret = len; |
| leave: |
| mutex_unlock(&chip->lock); |
| return ret; |
| } |
| store_leds(1) |
| store_leds(2) |
| store_leds(3) |
| |
| static ssize_t store_engine_load(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t len, int nr) |
| { |
| struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| struct lp55xx_chip *chip = led->chip; |
| int ret; |
| |
| mutex_lock(&chip->lock); |
| |
| chip->engine_idx = nr; |
| lp5523_load_engine_and_select_page(chip); |
| ret = lp5523_update_program_memory(chip, buf, len); |
| |
| mutex_unlock(&chip->lock); |
| |
| return ret; |
| } |
| store_load(1) |
| store_load(2) |
| store_load(3) |
| |
| static ssize_t lp5523_selftest(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| struct lp55xx_chip *chip = led->chip; |
| struct lp55xx_platform_data *pdata = chip->pdata; |
| int i, ret, pos = 0; |
| u8 status, adc, vdd; |
| |
| mutex_lock(&chip->lock); |
| |
| ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
| if (ret < 0) |
| goto fail; |
| |
| /* Check that ext clock is really in use if requested */ |
| if (pdata->clock_mode == LP55XX_CLOCK_EXT) { |
| if ((status & LP5523_EXT_CLK_USED) == 0) |
| goto fail; |
| } |
| |
| /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */ |
| lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16); |
| usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */ |
| ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
| if (ret < 0) |
| goto fail; |
| |
| if (!(status & LP5523_LEDTEST_DONE)) |
| usleep_range(3000, 6000); /* Was not ready. Wait little bit */ |
| |
| ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd); |
| if (ret < 0) |
| goto fail; |
| |
| vdd--; /* There may be some fluctuation in measurement */ |
| |
| for (i = 0; i < LP5523_MAX_LEDS; i++) { |
| /* Skip non-existing channels */ |
| if (pdata->led_config[i].led_current == 0) |
| continue; |
| |
| /* Set default current */ |
| lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
| pdata->led_config[i].led_current); |
| |
| lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff); |
| /* let current stabilize 2 - 4ms before measurements start */ |
| usleep_range(2000, 4000); |
| lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, |
| LP5523_EN_LEDTEST | i); |
| /* ADC conversion time is 2.7 ms typically */ |
| usleep_range(3000, 6000); |
| ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
| if (ret < 0) |
| goto fail; |
| |
| if (!(status & LP5523_LEDTEST_DONE)) |
| usleep_range(3000, 6000);/* Was not ready. Wait. */ |
| |
| ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc); |
| if (ret < 0) |
| goto fail; |
| |
| if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM) |
| pos += sprintf(buf + pos, "LED %d FAIL\n", i); |
| |
| lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00); |
| |
| /* Restore current */ |
| lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
| led->led_current); |
| led++; |
| } |
| if (pos == 0) |
| pos = sprintf(buf, "OK\n"); |
| goto release_lock; |
| fail: |
| pos = sprintf(buf, "FAIL\n"); |
| |
| release_lock: |
| mutex_unlock(&chip->lock); |
| |
| return pos; |
| } |
| |
| #define show_fader(nr) \ |
| static ssize_t show_master_fader##nr(struct device *dev, \ |
| struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| return show_master_fader(dev, attr, buf, nr); \ |
| } |
| |
| #define store_fader(nr) \ |
| static ssize_t store_master_fader##nr(struct device *dev, \ |
| struct device_attribute *attr, \ |
| const char *buf, size_t len) \ |
| { \ |
| return store_master_fader(dev, attr, buf, len, nr); \ |
| } |
| |
| static ssize_t show_master_fader(struct device *dev, |
| struct device_attribute *attr, |
| char *buf, int nr) |
| { |
| struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| struct lp55xx_chip *chip = led->chip; |
| int ret; |
| u8 val; |
| |
| mutex_lock(&chip->lock); |
| ret = lp55xx_read(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, &val); |
| mutex_unlock(&chip->lock); |
| |
| if (ret == 0) |
| ret = sprintf(buf, "%u\n", val); |
| |
| return ret; |
| } |
| show_fader(1) |
| show_fader(2) |
| show_fader(3) |
| |
| static ssize_t store_master_fader(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t len, int nr) |
| { |
| struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| struct lp55xx_chip *chip = led->chip; |
| int ret; |
| unsigned long val; |
| |
| if (kstrtoul(buf, 0, &val)) |
| return -EINVAL; |
| |
| if (val > 0xff) |
| return -EINVAL; |
| |
| mutex_lock(&chip->lock); |
| ret = lp55xx_write(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, |
| (u8)val); |
| mutex_unlock(&chip->lock); |
| |
| if (ret == 0) |
| ret = len; |
| |
| return ret; |
| } |
| store_fader(1) |
| store_fader(2) |
| store_fader(3) |
| |
| static ssize_t show_master_fader_leds(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| struct lp55xx_chip *chip = led->chip; |
| int i, ret, pos = 0; |
| u8 val; |
| |
| mutex_lock(&chip->lock); |
| |
| for (i = 0; i < LP5523_MAX_LEDS; i++) { |
| ret = lp55xx_read(chip, LP5523_REG_LED_CTRL_BASE + i, &val); |
| if (ret) |
| goto leave; |
| |
| val = (val & LP5523_FADER_MAPPING_MASK) |
| >> LP5523_FADER_MAPPING_SHIFT; |
| if (val > 3) { |
| ret = -EINVAL; |
| goto leave; |
| } |
| buf[pos++] = val + '0'; |
| } |
| buf[pos++] = '\n'; |
| ret = pos; |
| leave: |
| mutex_unlock(&chip->lock); |
| return ret; |
| } |
| |
| static ssize_t store_master_fader_leds(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t len) |
| { |
| struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
| struct lp55xx_chip *chip = led->chip; |
| int i, n, ret; |
| u8 val; |
| |
| n = min_t(int, len, LP5523_MAX_LEDS); |
| |
| mutex_lock(&chip->lock); |
| |
| for (i = 0; i < n; i++) { |
| if (buf[i] >= '0' && buf[i] <= '3') { |
| val = (buf[i] - '0') << LP5523_FADER_MAPPING_SHIFT; |
| ret = lp55xx_update_bits(chip, |
| LP5523_REG_LED_CTRL_BASE + i, |
| LP5523_FADER_MAPPING_MASK, |
| val); |
| if (ret) |
| goto leave; |
| } else { |
| ret = -EINVAL; |
| goto leave; |
| } |
| } |
| ret = len; |
| leave: |
| mutex_unlock(&chip->lock); |
| return ret; |
| } |
| |
| static int lp5523_multicolor_brightness(struct lp55xx_led *led) |
| { |
| struct lp55xx_chip *chip = led->chip; |
| int ret; |
| int i; |
| |
| mutex_lock(&chip->lock); |
| for (i = 0; i < led->mc_cdev.num_colors; i++) { |
| ret = lp55xx_write(chip, |
| LP5523_REG_LED_PWM_BASE + |
| led->mc_cdev.subled_info[i].channel, |
| led->mc_cdev.subled_info[i].brightness); |
| if (ret) |
| break; |
| } |
| mutex_unlock(&chip->lock); |
| return ret; |
| } |
| |
| static int lp5523_led_brightness(struct lp55xx_led *led) |
| { |
| struct lp55xx_chip *chip = led->chip; |
| int ret; |
| |
| mutex_lock(&chip->lock); |
| ret = lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr, |
| led->brightness); |
| mutex_unlock(&chip->lock); |
| return ret; |
| } |
| |
| static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode); |
| static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode); |
| static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode); |
| static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds); |
| static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds); |
| static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds); |
| static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load); |
| static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load); |
| static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load); |
| static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest); |
| static LP55XX_DEV_ATTR_RW(master_fader1, show_master_fader1, |
| store_master_fader1); |
| static LP55XX_DEV_ATTR_RW(master_fader2, show_master_fader2, |
| store_master_fader2); |
| static LP55XX_DEV_ATTR_RW(master_fader3, show_master_fader3, |
| store_master_fader3); |
| static LP55XX_DEV_ATTR_RW(master_fader_leds, show_master_fader_leds, |
| store_master_fader_leds); |
| |
| static struct attribute *lp5523_attributes[] = { |
| &dev_attr_engine1_mode.attr, |
| &dev_attr_engine2_mode.attr, |
| &dev_attr_engine3_mode.attr, |
| &dev_attr_engine1_load.attr, |
| &dev_attr_engine2_load.attr, |
| &dev_attr_engine3_load.attr, |
| &dev_attr_engine1_leds.attr, |
| &dev_attr_engine2_leds.attr, |
| &dev_attr_engine3_leds.attr, |
| &dev_attr_selftest.attr, |
| &dev_attr_master_fader1.attr, |
| &dev_attr_master_fader2.attr, |
| &dev_attr_master_fader3.attr, |
| &dev_attr_master_fader_leds.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group lp5523_group = { |
| .attrs = lp5523_attributes, |
| }; |
| |
| /* Chip specific configurations */ |
| static struct lp55xx_device_config lp5523_cfg = { |
| .reset = { |
| .addr = LP5523_REG_RESET, |
| .val = LP5523_RESET, |
| }, |
| .enable = { |
| .addr = LP5523_REG_ENABLE, |
| .val = LP5523_ENABLE, |
| }, |
| .max_channel = LP5523_MAX_LEDS, |
| .post_init_device = lp5523_post_init_device, |
| .brightness_fn = lp5523_led_brightness, |
| .multicolor_brightness_fn = lp5523_multicolor_brightness, |
| .set_led_current = lp5523_set_led_current, |
| .firmware_cb = lp5523_firmware_loaded, |
| .run_engine = lp5523_run_engine, |
| .dev_attr_group = &lp5523_group, |
| }; |
| |
| static int lp5523_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| int ret; |
| struct lp55xx_chip *chip; |
| struct lp55xx_led *led; |
| struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev); |
| struct device_node *np = dev_of_node(&client->dev); |
| |
| chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
| if (!chip) |
| return -ENOMEM; |
| |
| chip->cfg = &lp5523_cfg; |
| |
| if (!pdata) { |
| if (np) { |
| pdata = lp55xx_of_populate_pdata(&client->dev, np, |
| chip); |
| if (IS_ERR(pdata)) |
| return PTR_ERR(pdata); |
| } else { |
| dev_err(&client->dev, "no platform data\n"); |
| return -EINVAL; |
| } |
| } |
| |
| led = devm_kcalloc(&client->dev, |
| pdata->num_channels, sizeof(*led), GFP_KERNEL); |
| if (!led) |
| return -ENOMEM; |
| |
| chip->cl = client; |
| chip->pdata = pdata; |
| |
| mutex_init(&chip->lock); |
| |
| i2c_set_clientdata(client, led); |
| |
| ret = lp55xx_init_device(chip); |
| if (ret) |
| goto err_init; |
| |
| dev_info(&client->dev, "%s Programmable led chip found\n", id->name); |
| |
| ret = lp55xx_register_leds(led, chip); |
| if (ret) |
| goto err_out; |
| |
| ret = lp55xx_register_sysfs(chip); |
| if (ret) { |
| dev_err(&client->dev, "registering sysfs failed\n"); |
| goto err_out; |
| } |
| |
| return 0; |
| |
| err_out: |
| lp55xx_deinit_device(chip); |
| err_init: |
| return ret; |
| } |
| |
| static void lp5523_remove(struct i2c_client *client) |
| { |
| struct lp55xx_led *led = i2c_get_clientdata(client); |
| struct lp55xx_chip *chip = led->chip; |
| |
| lp5523_stop_all_engines(chip); |
| lp55xx_unregister_sysfs(chip); |
| lp55xx_deinit_device(chip); |
| } |
| |
| static const struct i2c_device_id lp5523_id[] = { |
| { "lp5523", LP5523 }, |
| { "lp55231", LP55231 }, |
| { } |
| }; |
| |
| MODULE_DEVICE_TABLE(i2c, lp5523_id); |
| |
| #ifdef CONFIG_OF |
| static const struct of_device_id of_lp5523_leds_match[] = { |
| { .compatible = "national,lp5523", }, |
| { .compatible = "ti,lp55231", }, |
| {}, |
| }; |
| |
| MODULE_DEVICE_TABLE(of, of_lp5523_leds_match); |
| #endif |
| |
| static struct i2c_driver lp5523_driver = { |
| .driver = { |
| .name = "lp5523x", |
| .of_match_table = of_match_ptr(of_lp5523_leds_match), |
| }, |
| .probe = lp5523_probe, |
| .remove = lp5523_remove, |
| .id_table = lp5523_id, |
| }; |
| |
| module_i2c_driver(lp5523_driver); |
| |
| MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>"); |
| MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
| MODULE_DESCRIPTION("LP5523 LED engine"); |
| MODULE_LICENSE("GPL"); |