| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kim (Woogyom) Milo | 2422 | 96.88% | 5 | 38.46% |
| Axel Lin | 38 | 1.52% | 1 | 7.69% |
| Andrew Lunn | 14 | 0.56% | 1 | 7.69% |
| Colin Ian King | 10 | 0.40% | 1 | 7.69% |
| Kees Cook | 5 | 0.20% | 1 | 7.69% |
| Nick Stoughton | 5 | 0.20% | 1 | 7.69% |
| Sachin Kamat | 3 | 0.12% | 1 | 7.69% |
| Thomas Gleixner | 2 | 0.08% | 1 | 7.69% |
| Stephen Boyd | 1 | 0.04% | 1 | 7.69% |
| Total | 2500 | 13 |
// SPDX-License-Identifier: GPL-2.0-only /* * LP5562 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/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 LP5562_PROGRAM_LENGTH 32 #define LP5562_MAX_LEDS 4 /* ENABLE Register 00h */ #define LP5562_REG_ENABLE 0x00 #define LP5562_EXEC_ENG1_M 0x30 #define LP5562_EXEC_ENG2_M 0x0C #define LP5562_EXEC_ENG3_M 0x03 #define LP5562_EXEC_M 0x3F #define LP5562_MASTER_ENABLE 0x40 /* Chip master enable */ #define LP5562_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */ #define LP5562_EXEC_RUN 0x2A #define LP5562_ENABLE_DEFAULT \ (LP5562_MASTER_ENABLE | LP5562_LOGARITHMIC_PWM) #define LP5562_ENABLE_RUN_PROGRAM \ (LP5562_ENABLE_DEFAULT | LP5562_EXEC_RUN) /* OPMODE Register 01h */ #define LP5562_REG_OP_MODE 0x01 #define LP5562_MODE_ENG1_M 0x30 #define LP5562_MODE_ENG2_M 0x0C #define LP5562_MODE_ENG3_M 0x03 #define LP5562_LOAD_ENG1 0x10 #define LP5562_LOAD_ENG2 0x04 #define LP5562_LOAD_ENG3 0x01 #define LP5562_RUN_ENG1 0x20 #define LP5562_RUN_ENG2 0x08 #define LP5562_RUN_ENG3 0x02 #define LP5562_ENG1_IS_LOADING(mode) \ ((mode & LP5562_MODE_ENG1_M) == LP5562_LOAD_ENG1) #define LP5562_ENG2_IS_LOADING(mode) \ ((mode & LP5562_MODE_ENG2_M) == LP5562_LOAD_ENG2) #define LP5562_ENG3_IS_LOADING(mode) \ ((mode & LP5562_MODE_ENG3_M) == LP5562_LOAD_ENG3) /* BRIGHTNESS Registers */ #define LP5562_REG_R_PWM 0x04 #define LP5562_REG_G_PWM 0x03 #define LP5562_REG_B_PWM 0x02 #define LP5562_REG_W_PWM 0x0E /* CURRENT Registers */ #define LP5562_REG_R_CURRENT 0x07 #define LP5562_REG_G_CURRENT 0x06 #define LP5562_REG_B_CURRENT 0x05 #define LP5562_REG_W_CURRENT 0x0F /* CONFIG Register 08h */ #define LP5562_REG_CONFIG 0x08 #define LP5562_PWM_HF 0x40 #define LP5562_PWRSAVE_EN 0x20 #define LP5562_CLK_INT 0x01 /* Internal clock */ #define LP5562_DEFAULT_CFG (LP5562_PWM_HF | LP5562_PWRSAVE_EN) /* RESET Register 0Dh */ #define LP5562_REG_RESET 0x0D #define LP5562_RESET 0xFF /* PROGRAM ENGINE Registers */ #define LP5562_REG_PROG_MEM_ENG1 0x10 #define LP5562_REG_PROG_MEM_ENG2 0x30 #define LP5562_REG_PROG_MEM_ENG3 0x50 /* LEDMAP Register 70h */ #define LP5562_REG_ENG_SEL 0x70 #define LP5562_ENG_SEL_PWM 0 #define LP5562_ENG_FOR_RGB_M 0x3F #define LP5562_ENG_SEL_RGB 0x1B /* R:ENG1, G:ENG2, B:ENG3 */ #define LP5562_ENG_FOR_W_M 0xC0 #define LP5562_ENG1_FOR_W 0x40 /* W:ENG1 */ #define LP5562_ENG2_FOR_W 0x80 /* W:ENG2 */ #define LP5562_ENG3_FOR_W 0xC0 /* W:ENG3 */ /* Program Commands */ #define LP5562_CMD_DISABLE 0x00 #define LP5562_CMD_LOAD 0x15 #define LP5562_CMD_RUN 0x2A #define LP5562_CMD_DIRECT 0x3F #define LP5562_PATTERN_OFF 0 static inline void lp5562_wait_opmode_done(void) { /* operation mode change needs to be longer than 153 us */ usleep_range(200, 300); } static inline void lp5562_wait_enable_done(void) { /* it takes more 488 us to update ENABLE register */ usleep_range(500, 600); } static void lp5562_set_led_current(struct lp55xx_led *led, u8 led_current) { static const u8 addr[] = { LP5562_REG_R_CURRENT, LP5562_REG_G_CURRENT, LP5562_REG_B_CURRENT, LP5562_REG_W_CURRENT, }; led->led_current = led_current; lp55xx_write(led->chip, addr[led->chan_nr], led_current); } static void lp5562_load_engine(struct lp55xx_chip *chip) { enum lp55xx_engine_index idx = chip->engine_idx; static const u8 mask[] = { [LP55XX_ENGINE_1] = LP5562_MODE_ENG1_M, [LP55XX_ENGINE_2] = LP5562_MODE_ENG2_M, [LP55XX_ENGINE_3] = LP5562_MODE_ENG3_M, }; static const u8 val[] = { [LP55XX_ENGINE_1] = LP5562_LOAD_ENG1, [LP55XX_ENGINE_2] = LP5562_LOAD_ENG2, [LP55XX_ENGINE_3] = LP5562_LOAD_ENG3, }; lp55xx_update_bits(chip, LP5562_REG_OP_MODE, mask[idx], val[idx]); lp5562_wait_opmode_done(); } static void lp5562_stop_engine(struct lp55xx_chip *chip) { lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DISABLE); lp5562_wait_opmode_done(); } static void lp5562_run_engine(struct lp55xx_chip *chip, bool start) { int ret; u8 mode; u8 exec; /* stop engine */ if (!start) { lp55xx_write(chip, LP5562_REG_ENABLE, LP5562_ENABLE_DEFAULT); lp5562_wait_enable_done(); lp5562_stop_engine(chip); lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM); lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT); lp5562_wait_opmode_done(); return; } /* * To run the engine, * operation mode and enable register should updated at the same time */ ret = lp55xx_read(chip, LP5562_REG_OP_MODE, &mode); if (ret) return; ret = lp55xx_read(chip, LP5562_REG_ENABLE, &exec); if (ret) return; /* change operation mode to RUN only when each engine is loading */ if (LP5562_ENG1_IS_LOADING(mode)) { mode = (mode & ~LP5562_MODE_ENG1_M) | LP5562_RUN_ENG1; exec = (exec & ~LP5562_EXEC_ENG1_M) | LP5562_RUN_ENG1; } if (LP5562_ENG2_IS_LOADING(mode)) { mode = (mode & ~LP5562_MODE_ENG2_M) | LP5562_RUN_ENG2; exec = (exec & ~LP5562_EXEC_ENG2_M) | LP5562_RUN_ENG2; } if (LP5562_ENG3_IS_LOADING(mode)) { mode = (mode & ~LP5562_MODE_ENG3_M) | LP5562_RUN_ENG3; exec = (exec & ~LP5562_EXEC_ENG3_M) | LP5562_RUN_ENG3; } lp55xx_write(chip, LP5562_REG_OP_MODE, mode); lp5562_wait_opmode_done(); lp55xx_update_bits(chip, LP5562_REG_ENABLE, LP5562_EXEC_M, exec); lp5562_wait_enable_done(); } static int lp5562_update_firmware(struct lp55xx_chip *chip, const u8 *data, size_t size) { enum lp55xx_engine_index idx = chip->engine_idx; u8 pattern[LP5562_PROGRAM_LENGTH] = {0}; static const u8 addr[] = { [LP55XX_ENGINE_1] = LP5562_REG_PROG_MEM_ENG1, [LP55XX_ENGINE_2] = LP5562_REG_PROG_MEM_ENG2, [LP55XX_ENGINE_3] = LP5562_REG_PROG_MEM_ENG3, }; unsigned cmd; char c[3]; int program_size; int nrchars; int offset = 0; int ret; int i; /* clear program memory before updating */ for (i = 0; i < LP5562_PROGRAM_LENGTH; i++) lp55xx_write(chip, addr[idx] + i, 0); i = 0; while ((offset < size - 1) && (i < LP5562_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; program_size = i; for (i = 0; i < program_size; i++) lp55xx_write(chip, addr[idx] + i, pattern[i]); return 0; err: dev_err(&chip->cl->dev, "wrong pattern format\n"); return -EINVAL; } static void lp5562_firmware_loaded(struct lp55xx_chip *chip) { const struct firmware *fw = chip->fw; /* * the firmware is encoded in ascii hex character, with 2 chars * per byte */ if (fw->size > (LP5562_PROGRAM_LENGTH * 2)) { 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 */ lp5562_load_engine(chip); lp5562_update_firmware(chip, fw->data, fw->size); } static int lp5562_post_init_device(struct lp55xx_chip *chip) { int ret; u8 cfg = LP5562_DEFAULT_CFG; /* Set all PWMs to direct control mode */ ret = lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT); if (ret) return ret; lp5562_wait_opmode_done(); /* Update configuration for the clock setting */ if (!lp55xx_is_extclk_used(chip)) cfg |= LP5562_CLK_INT; ret = lp55xx_write(chip, LP5562_REG_CONFIG, cfg); if (ret) return ret; /* Initialize all channels PWM to zero -> leds off */ lp55xx_write(chip, LP5562_REG_R_PWM, 0); lp55xx_write(chip, LP5562_REG_G_PWM, 0); lp55xx_write(chip, LP5562_REG_B_PWM, 0); lp55xx_write(chip, LP5562_REG_W_PWM, 0); /* Set LED map as register PWM by default */ lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM); return 0; } static int lp5562_led_brightness(struct lp55xx_led *led) { struct lp55xx_chip *chip = led->chip; static const u8 addr[] = { LP5562_REG_R_PWM, LP5562_REG_G_PWM, LP5562_REG_B_PWM, LP5562_REG_W_PWM, }; int ret; mutex_lock(&chip->lock); ret = lp55xx_write(chip, addr[led->chan_nr], led->brightness); mutex_unlock(&chip->lock); return ret; } static void lp5562_write_program_memory(struct lp55xx_chip *chip, u8 base, const u8 *rgb, int size) { int i; if (!rgb || size <= 0) return; for (i = 0; i < size; i++) lp55xx_write(chip, base + i, *(rgb + i)); lp55xx_write(chip, base + i, 0); lp55xx_write(chip, base + i + 1, 0); } /* check the size of program count */ static inline bool _is_pc_overflow(struct lp55xx_predef_pattern *ptn) { return ptn->size_r >= LP5562_PROGRAM_LENGTH || ptn->size_g >= LP5562_PROGRAM_LENGTH || ptn->size_b >= LP5562_PROGRAM_LENGTH; } static int lp5562_run_predef_led_pattern(struct lp55xx_chip *chip, int mode) { struct lp55xx_predef_pattern *ptn; int i; if (mode == LP5562_PATTERN_OFF) { lp5562_run_engine(chip, false); return 0; } ptn = chip->pdata->patterns + (mode - 1); if (!ptn || _is_pc_overflow(ptn)) { dev_err(&chip->cl->dev, "invalid pattern data\n"); return -EINVAL; } lp5562_stop_engine(chip); /* Set LED map as RGB */ lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_RGB); /* Load engines */ for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { chip->engine_idx = i; lp5562_load_engine(chip); } /* Clear program registers */ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1, 0); lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1 + 1, 0); lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2, 0); lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2 + 1, 0); lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3, 0); lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3 + 1, 0); /* Program engines */ lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG1, ptn->r, ptn->size_r); lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG2, ptn->g, ptn->size_g); lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG3, ptn->b, ptn->size_b); /* Run engines */ lp5562_run_engine(chip, true); return 0; } static ssize_t lp5562_store_pattern(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; struct lp55xx_predef_pattern *ptn = chip->pdata->patterns; int num_patterns = chip->pdata->num_patterns; unsigned long mode; int ret; ret = kstrtoul(buf, 0, &mode); if (ret) return ret; if (mode > num_patterns || !ptn) return -EINVAL; mutex_lock(&chip->lock); ret = lp5562_run_predef_led_pattern(chip, mode); mutex_unlock(&chip->lock); if (ret) return ret; return len; } static ssize_t lp5562_store_engine_mux(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; u8 mask; u8 val; /* LED map * R ... Engine 1 (fixed) * G ... Engine 2 (fixed) * B ... Engine 3 (fixed) * W ... Engine 1 or 2 or 3 */ if (sysfs_streq(buf, "RGB")) { mask = LP5562_ENG_FOR_RGB_M; val = LP5562_ENG_SEL_RGB; } else if (sysfs_streq(buf, "W")) { enum lp55xx_engine_index idx = chip->engine_idx; mask = LP5562_ENG_FOR_W_M; switch (idx) { case LP55XX_ENGINE_1: val = LP5562_ENG1_FOR_W; break; case LP55XX_ENGINE_2: val = LP5562_ENG2_FOR_W; break; case LP55XX_ENGINE_3: val = LP5562_ENG3_FOR_W; break; default: return -EINVAL; } } else { dev_err(dev, "choose RGB or W\n"); return -EINVAL; } mutex_lock(&chip->lock); lp55xx_update_bits(chip, LP5562_REG_ENG_SEL, mask, val); mutex_unlock(&chip->lock); return len; } static LP55XX_DEV_ATTR_WO(led_pattern, lp5562_store_pattern); static LP55XX_DEV_ATTR_WO(engine_mux, lp5562_store_engine_mux); static struct attribute *lp5562_attributes[] = { &dev_attr_led_pattern.attr, &dev_attr_engine_mux.attr, NULL, }; static const struct attribute_group lp5562_group = { .attrs = lp5562_attributes, }; /* Chip specific configurations */ static struct lp55xx_device_config lp5562_cfg = { .max_channel = LP5562_MAX_LEDS, .reset = { .addr = LP5562_REG_RESET, .val = LP5562_RESET, }, .enable = { .addr = LP5562_REG_ENABLE, .val = LP5562_ENABLE_DEFAULT, }, .post_init_device = lp5562_post_init_device, .set_led_current = lp5562_set_led_current, .brightness_fn = lp5562_led_brightness, .run_engine = lp5562_run_engine, .firmware_cb = lp5562_firmware_loaded, .dev_attr_group = &lp5562_group, }; static int lp5562_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 = &lp5562_cfg; mutex_init(&chip->lock); i2c_set_clientdata(client, led); ret = lp55xx_init_device(chip); if (ret) goto err_init; 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 lp5562_remove(struct i2c_client *client) { struct lp55xx_led *led = i2c_get_clientdata(client); struct lp55xx_chip *chip = led->chip; lp5562_stop_engine(chip); lp55xx_unregister_sysfs(chip); lp55xx_unregister_leds(led, chip); lp55xx_deinit_device(chip); return 0; } static const struct i2c_device_id lp5562_id[] = { { "lp5562", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, lp5562_id); #ifdef CONFIG_OF static const struct of_device_id of_lp5562_leds_match[] = { { .compatible = "ti,lp5562", }, {}, }; MODULE_DEVICE_TABLE(of, of_lp5562_leds_match); #endif static struct i2c_driver lp5562_driver = { .driver = { .name = "lp5562", .of_match_table = of_match_ptr(of_lp5562_leds_match), }, .probe = lp5562_probe, .remove = lp5562_remove, .id_table = lp5562_id, }; module_i2c_driver(lp5562_driver); MODULE_DESCRIPTION("Texas Instruments LP5562 LED Driver"); MODULE_AUTHOR("Milo Kim"); MODULE_LICENSE("GPL");
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