| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kim (Woogyom) Milo | 1588 | 98.02% | 2 | 22.22% |
| Andrew Lunn | 14 | 0.86% | 1 | 11.11% |
| Colin Ian King | 6 | 0.37% | 1 | 11.11% |
| Kees Cook | 5 | 0.31% | 1 | 11.11% |
| Sachin Kamat | 3 | 0.19% | 1 | 11.11% |
| Thomas Gleixner | 2 | 0.12% | 1 | 11.11% |
| Pavel Machek | 1 | 0.06% | 1 | 11.11% |
| Masanari Iida | 1 | 0.06% | 1 | 11.11% |
| Total | 1620 | 9 |
// SPDX-License-Identifier: GPL-2.0-only /* * TI LP8501 9 channel LED Driver * * Copyright (C) 2013 Texas Instruments * * Author: Milo(Woogyom) Kim <milo.kim@ti.com> */ #include <linux/delay.h> #include <linux/firmware.h> #include <linux/i2c.h> #include <linux/init.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 LP8501_PROGRAM_LENGTH 32 #define LP8501_MAX_LEDS 9 /* Registers */ #define LP8501_REG_ENABLE 0x00 #define LP8501_ENABLE BIT(6) #define LP8501_EXEC_M 0x3F #define LP8501_EXEC_ENG1_M 0x30 #define LP8501_EXEC_ENG2_M 0x0C #define LP8501_EXEC_ENG3_M 0x03 #define LP8501_RUN_ENG1 0x20 #define LP8501_RUN_ENG2 0x08 #define LP8501_RUN_ENG3 0x02 #define LP8501_REG_OP_MODE 0x01 #define LP8501_MODE_ENG1_M 0x30 #define LP8501_MODE_ENG2_M 0x0C #define LP8501_MODE_ENG3_M 0x03 #define LP8501_LOAD_ENG1 0x10 #define LP8501_LOAD_ENG2 0x04 #define LP8501_LOAD_ENG3 0x01 #define LP8501_REG_PWR_CONFIG 0x05 #define LP8501_PWR_CONFIG_M 0x03 #define LP8501_REG_LED_PWM_BASE 0x16 #define LP8501_REG_LED_CURRENT_BASE 0x26 #define LP8501_REG_CONFIG 0x36 #define LP8501_PWM_PSAVE BIT(7) #define LP8501_AUTO_INC BIT(6) #define LP8501_PWR_SAVE BIT(5) #define LP8501_CP_AUTO 0x18 #define LP8501_INT_CLK BIT(0) #define LP8501_DEFAULT_CFG \ (LP8501_PWM_PSAVE | LP8501_AUTO_INC | LP8501_PWR_SAVE | LP8501_CP_AUTO) #define LP8501_REG_RESET 0x3D #define LP8501_RESET 0xFF #define LP8501_REG_PROG_PAGE_SEL 0x4F #define LP8501_PAGE_ENG1 0 #define LP8501_PAGE_ENG2 1 #define LP8501_PAGE_ENG3 2 #define LP8501_REG_PROG_MEM 0x50 #define LP8501_ENG1_IS_LOADING(mode) \ ((mode & LP8501_MODE_ENG1_M) == LP8501_LOAD_ENG1) #define LP8501_ENG2_IS_LOADING(mode) \ ((mode & LP8501_MODE_ENG2_M) == LP8501_LOAD_ENG2) #define LP8501_ENG3_IS_LOADING(mode) \ ((mode & LP8501_MODE_ENG3_M) == LP8501_LOAD_ENG3) static inline void lp8501_wait_opmode_done(void) { usleep_range(1000, 2000); } static void lp8501_set_led_current(struct lp55xx_led *led, u8 led_current) { led->led_current = led_current; lp55xx_write(led->chip, LP8501_REG_LED_CURRENT_BASE + led->chan_nr, led_current); } static int lp8501_post_init_device(struct lp55xx_chip *chip) { int ret; u8 val = LP8501_DEFAULT_CFG; ret = lp55xx_write(chip, LP8501_REG_ENABLE, LP8501_ENABLE); if (ret) return ret; /* Chip startup time is 500 us, 1 - 2 ms gives some margin */ usleep_range(1000, 2000); if (chip->pdata->clock_mode != LP55XX_CLOCK_EXT) val |= LP8501_INT_CLK; ret = lp55xx_write(chip, LP8501_REG_CONFIG, val); if (ret) return ret; /* Power selection for each output */ return lp55xx_update_bits(chip, LP8501_REG_PWR_CONFIG, LP8501_PWR_CONFIG_M, chip->pdata->pwr_sel); } static void lp8501_load_engine(struct lp55xx_chip *chip) { enum lp55xx_engine_index idx = chip->engine_idx; static const u8 mask[] = { [LP55XX_ENGINE_1] = LP8501_MODE_ENG1_M, [LP55XX_ENGINE_2] = LP8501_MODE_ENG2_M, [LP55XX_ENGINE_3] = LP8501_MODE_ENG3_M, }; static const u8 val[] = { [LP55XX_ENGINE_1] = LP8501_LOAD_ENG1, [LP55XX_ENGINE_2] = LP8501_LOAD_ENG2, [LP55XX_ENGINE_3] = LP8501_LOAD_ENG3, }; static const u8 page_sel[] = { [LP55XX_ENGINE_1] = LP8501_PAGE_ENG1, [LP55XX_ENGINE_2] = LP8501_PAGE_ENG2, [LP55XX_ENGINE_3] = LP8501_PAGE_ENG3, }; lp55xx_update_bits(chip, LP8501_REG_OP_MODE, mask[idx], val[idx]); lp8501_wait_opmode_done(); lp55xx_write(chip, LP8501_REG_PROG_PAGE_SEL, page_sel[idx]); } static void lp8501_stop_engine(struct lp55xx_chip *chip) { lp55xx_write(chip, LP8501_REG_OP_MODE, 0); lp8501_wait_opmode_done(); } static void lp8501_turn_off_channels(struct lp55xx_chip *chip) { int i; for (i = 0; i < LP8501_MAX_LEDS; i++) lp55xx_write(chip, LP8501_REG_LED_PWM_BASE + i, 0); } static void lp8501_run_engine(struct lp55xx_chip *chip, bool start) { int ret; u8 mode; u8 exec; /* stop engine */ if (!start) { lp8501_stop_engine(chip); lp8501_turn_off_channels(chip); return; } /* * To run the engine, * operation mode and enable register should updated at the same time */ ret = lp55xx_read(chip, LP8501_REG_OP_MODE, &mode); if (ret) return; ret = lp55xx_read(chip, LP8501_REG_ENABLE, &exec); if (ret) return; /* change operation mode to RUN only when each engine is loading */ if (LP8501_ENG1_IS_LOADING(mode)) { mode = (mode & ~LP8501_MODE_ENG1_M) | LP8501_RUN_ENG1; exec = (exec & ~LP8501_EXEC_ENG1_M) | LP8501_RUN_ENG1; } if (LP8501_ENG2_IS_LOADING(mode)) { mode = (mode & ~LP8501_MODE_ENG2_M) | LP8501_RUN_ENG2; exec = (exec & ~LP8501_EXEC_ENG2_M) | LP8501_RUN_ENG2; } if (LP8501_ENG3_IS_LOADING(mode)) { mode = (mode & ~LP8501_MODE_ENG3_M) | LP8501_RUN_ENG3; exec = (exec & ~LP8501_EXEC_ENG3_M) | LP8501_RUN_ENG3; } lp55xx_write(chip, LP8501_REG_OP_MODE, mode); lp8501_wait_opmode_done(); lp55xx_update_bits(chip, LP8501_REG_ENABLE, LP8501_EXEC_M, exec); } static int lp8501_update_program_memory(struct lp55xx_chip *chip, const u8 *data, size_t size) { u8 pattern[LP8501_PROGRAM_LENGTH] = {0}; unsigned cmd; char c[3]; int update_size; int nrchars; int offset = 0; int ret; int i; /* clear program memory before updating */ for (i = 0; i < LP8501_PROGRAM_LENGTH; i++) lp55xx_write(chip, LP8501_REG_PROG_MEM + i, 0); i = 0; while ((offset < size - 1) && (i < LP8501_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; update_size = i; for (i = 0; i < update_size; i++) lp55xx_write(chip, LP8501_REG_PROG_MEM + i, pattern[i]); return 0; err: dev_err(&chip->cl->dev, "wrong pattern format\n"); return -EINVAL; } static void lp8501_firmware_loaded(struct lp55xx_chip *chip) { const struct firmware *fw = chip->fw; if (fw->size > LP8501_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 */ lp8501_load_engine(chip); lp8501_update_program_memory(chip, fw->data, fw->size); } static int lp8501_led_brightness(struct lp55xx_led *led) { struct lp55xx_chip *chip = led->chip; int ret; mutex_lock(&chip->lock); ret = lp55xx_write(chip, LP8501_REG_LED_PWM_BASE + led->chan_nr, led->brightness); mutex_unlock(&chip->lock); return ret; } /* Chip specific configurations */ static struct lp55xx_device_config lp8501_cfg = { .reset = { .addr = LP8501_REG_RESET, .val = LP8501_RESET, }, .enable = { .addr = LP8501_REG_ENABLE, .val = LP8501_ENABLE, }, .max_channel = LP8501_MAX_LEDS, .post_init_device = lp8501_post_init_device, .brightness_fn = lp8501_led_brightness, .set_led_current = lp8501_set_led_current, .firmware_cb = lp8501_firmware_loaded, .run_engine = lp8501_run_engine, }; static int lp8501_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 = &lp8501_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 lp8501_remove(struct i2c_client *client) { struct lp55xx_led *led = i2c_get_clientdata(client); struct lp55xx_chip *chip = led->chip; lp8501_stop_engine(chip); lp55xx_unregister_sysfs(chip); lp55xx_unregister_leds(led, chip); lp55xx_deinit_device(chip); return 0; } static const struct i2c_device_id lp8501_id[] = { { "lp8501", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, lp8501_id); #ifdef CONFIG_OF static const struct of_device_id of_lp8501_leds_match[] = { { .compatible = "ti,lp8501", }, {}, }; MODULE_DEVICE_TABLE(of, of_lp8501_leds_match); #endif static struct i2c_driver lp8501_driver = { .driver = { .name = "lp8501", .of_match_table = of_match_ptr(of_lp8501_leds_match), }, .probe = lp8501_probe, .remove = lp8501_remove, .id_table = lp8501_id, }; module_i2c_driver(lp8501_driver); MODULE_DESCRIPTION("Texas Instruments LP8501 LED driver"); MODULE_AUTHOR("Milo Kim"); MODULE_LICENSE("GPL");
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