| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kim (Woogyom) Milo | 2663 | 61.35% | 33 | 64.71% |
| Samu Onkalo | 794 | 18.29% | 3 | 5.88% |
| Toshi Kikuchi | 741 | 17.07% | 1 | 1.96% |
| Axel Lin | 40 | 0.92% | 2 | 3.92% |
| Linus Walleij | 31 | 0.71% | 1 | 1.96% |
| Andrew Lunn | 14 | 0.32% | 1 | 1.96% |
| Jingoo Han | 11 | 0.25% | 1 | 1.96% |
| Colin Ian King | 10 | 0.23% | 1 | 1.96% |
| Kangjie Lu | 9 | 0.21% | 1 | 1.96% |
| Bryan Wu | 8 | 0.18% | 1 | 1.96% |
| Daniel Mack | 8 | 0.18% | 1 | 1.96% |
| Kees Cook | 5 | 0.12% | 1 | 1.96% |
| Sachin Kamat | 3 | 0.07% | 1 | 1.96% |
| Pavel Machek | 2 | 0.05% | 1 | 1.96% |
| Stephen Boyd | 1 | 0.02% | 1 | 1.96% |
| Arvind Yadav | 1 | 0.02% | 1 | 1.96% |
| Total | 4341 | 51 |
/* * 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> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA */ #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) return ret; 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 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_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, .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 = client->dev.of_node; if (!pdata) { if (np) { pdata = lp55xx_of_populate_pdata(&client->dev, np); if (IS_ERR(pdata)) return PTR_ERR(pdata); } else { dev_err(&client->dev, "no platform data\n"); return -EINVAL; } } chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); if (!chip) return -ENOMEM; led = devm_kcalloc(&client->dev, pdata->num_channels, sizeof(*led), GFP_KERNEL); if (!led) return -ENOMEM; chip->cl = client; chip->pdata = pdata; chip->cfg = &lp5523_cfg; 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_register_leds; ret = lp55xx_register_sysfs(chip); if (ret) { dev_err(&client->dev, "registering sysfs failed\n"); goto err_register_sysfs; } return 0; err_register_sysfs: lp55xx_unregister_leds(led, chip); err_register_leds: lp55xx_deinit_device(chip); err_init: return ret; } static int 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_unregister_leds(led, chip); lp55xx_deinit_device(chip); return 0; } 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");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1