| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kim (Woogyom) Milo | 1694 | 67.28% | 31 | 67.39% |
| Samu Onkalo | 691 | 27.44% | 2 | 4.35% |
| Axel Lin | 40 | 1.59% | 2 | 4.35% |
| Linus Walleij | 34 | 1.35% | 1 | 2.17% |
| Andrew Lunn | 14 | 0.56% | 1 | 2.17% |
| Dan Carpenter | 9 | 0.36% | 1 | 2.17% |
| Bryan Wu | 8 | 0.32% | 1 | 2.17% |
| Colin Ian King | 8 | 0.32% | 1 | 2.17% |
| Srinidhi Kasagar | 8 | 0.32% | 2 | 4.35% |
| Kees Cook | 5 | 0.20% | 1 | 2.17% |
| Vasiliy Kulikov | 4 | 0.16% | 1 | 2.17% |
| Thomas Gleixner | 2 | 0.08% | 1 | 2.17% |
| Stephen Boyd | 1 | 0.04% | 1 | 2.17% |
| Total | 2518 | 46 |
// SPDX-License-Identifier: GPL-2.0-only /* * LP5521 LED chip 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/platform_data/leds-lp55xx.h> #include <linux/slab.h> #include <linux/of.h> #include "leds-lp55xx-common.h" #define LP5521_PROGRAM_LENGTH 32 #define LP5521_MAX_LEDS 3 #define LP5521_CMD_DIRECT 0x3F /* Registers */ #define LP5521_REG_ENABLE 0x00 #define LP5521_REG_OP_MODE 0x01 #define LP5521_REG_R_PWM 0x02 #define LP5521_REG_G_PWM 0x03 #define LP5521_REG_B_PWM 0x04 #define LP5521_REG_R_CURRENT 0x05 #define LP5521_REG_G_CURRENT 0x06 #define LP5521_REG_B_CURRENT 0x07 #define LP5521_REG_CONFIG 0x08 #define LP5521_REG_STATUS 0x0C #define LP5521_REG_RESET 0x0D #define LP5521_REG_R_PROG_MEM 0x10 #define LP5521_REG_G_PROG_MEM 0x30 #define LP5521_REG_B_PROG_MEM 0x50 /* Base register to set LED current */ #define LP5521_REG_LED_CURRENT_BASE LP5521_REG_R_CURRENT /* Base register to set the brightness */ #define LP5521_REG_LED_PWM_BASE LP5521_REG_R_PWM /* Bits in ENABLE register */ #define LP5521_MASTER_ENABLE 0x40 /* Chip master enable */ #define LP5521_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */ #define LP5521_EXEC_RUN 0x2A #define LP5521_ENABLE_DEFAULT \ (LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM) #define LP5521_ENABLE_RUN_PROGRAM \ (LP5521_ENABLE_DEFAULT | LP5521_EXEC_RUN) /* CONFIG register */ #define LP5521_PWM_HF 0x40 /* PWM: 0 = 256Hz, 1 = 558Hz */ #define LP5521_PWRSAVE_EN 0x20 /* 1 = Power save mode */ #define LP5521_CP_MODE_OFF 0 /* Charge pump (CP) off */ #define LP5521_CP_MODE_BYPASS 8 /* CP forced to bypass mode */ #define LP5521_CP_MODE_1X5 0x10 /* CP forced to 1.5x mode */ #define LP5521_CP_MODE_AUTO 0x18 /* Automatic mode selection */ #define LP5521_R_TO_BATT 0x04 /* R out: 0 = CP, 1 = Vbat */ #define LP5521_CLK_INT 0x01 /* Internal clock */ #define LP5521_DEFAULT_CFG \ (LP5521_PWM_HF | LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO) /* Status */ #define LP5521_EXT_CLK_USED 0x08 /* default R channel current register value */ #define LP5521_REG_R_CURR_DEFAULT 0xAF /* Reset register value */ #define LP5521_RESET 0xFF /* Program Memory Operations */ #define LP5521_MODE_R_M 0x30 /* Operation Mode Register */ #define LP5521_MODE_G_M 0x0C #define LP5521_MODE_B_M 0x03 #define LP5521_LOAD_R 0x10 #define LP5521_LOAD_G 0x04 #define LP5521_LOAD_B 0x01 #define LP5521_R_IS_LOADING(mode) \ ((mode & LP5521_MODE_R_M) == LP5521_LOAD_R) #define LP5521_G_IS_LOADING(mode) \ ((mode & LP5521_MODE_G_M) == LP5521_LOAD_G) #define LP5521_B_IS_LOADING(mode) \ ((mode & LP5521_MODE_B_M) == LP5521_LOAD_B) #define LP5521_EXEC_R_M 0x30 /* Enable Register */ #define LP5521_EXEC_G_M 0x0C #define LP5521_EXEC_B_M 0x03 #define LP5521_EXEC_M 0x3F #define LP5521_RUN_R 0x20 #define LP5521_RUN_G 0x08 #define LP5521_RUN_B 0x02 static inline void lp5521_wait_opmode_done(void) { /* operation mode change needs to be longer than 153 us */ usleep_range(200, 300); } static inline void lp5521_wait_enable_done(void) { /* it takes more 488 us to update ENABLE register */ usleep_range(500, 600); } static void lp5521_set_led_current(struct lp55xx_led *led, u8 led_current) { led->led_current = led_current; lp55xx_write(led->chip, LP5521_REG_LED_CURRENT_BASE + led->chan_nr, led_current); } static void lp5521_load_engine(struct lp55xx_chip *chip) { enum lp55xx_engine_index idx = chip->engine_idx; static const u8 mask[] = { [LP55XX_ENGINE_1] = LP5521_MODE_R_M, [LP55XX_ENGINE_2] = LP5521_MODE_G_M, [LP55XX_ENGINE_3] = LP5521_MODE_B_M, }; static const u8 val[] = { [LP55XX_ENGINE_1] = LP5521_LOAD_R, [LP55XX_ENGINE_2] = LP5521_LOAD_G, [LP55XX_ENGINE_3] = LP5521_LOAD_B, }; lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], val[idx]); lp5521_wait_opmode_done(); } static void lp5521_stop_all_engines(struct lp55xx_chip *chip) { lp55xx_write(chip, LP5521_REG_OP_MODE, 0); lp5521_wait_opmode_done(); } static void lp5521_stop_engine(struct lp55xx_chip *chip) { enum lp55xx_engine_index idx = chip->engine_idx; static const u8 mask[] = { [LP55XX_ENGINE_1] = LP5521_MODE_R_M, [LP55XX_ENGINE_2] = LP5521_MODE_G_M, [LP55XX_ENGINE_3] = LP5521_MODE_B_M, }; lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], 0); lp5521_wait_opmode_done(); } static void lp5521_run_engine(struct lp55xx_chip *chip, bool start) { int ret; u8 mode; u8 exec; /* stop engine */ if (!start) { lp5521_stop_engine(chip); lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); lp5521_wait_opmode_done(); return; } /* * To run the engine, * operation mode and enable register should updated at the same time */ ret = lp55xx_read(chip, LP5521_REG_OP_MODE, &mode); if (ret) return; ret = lp55xx_read(chip, LP5521_REG_ENABLE, &exec); if (ret) return; /* change operation mode to RUN only when each engine is loading */ if (LP5521_R_IS_LOADING(mode)) { mode = (mode & ~LP5521_MODE_R_M) | LP5521_RUN_R; exec = (exec & ~LP5521_EXEC_R_M) | LP5521_RUN_R; } if (LP5521_G_IS_LOADING(mode)) { mode = (mode & ~LP5521_MODE_G_M) | LP5521_RUN_G; exec = (exec & ~LP5521_EXEC_G_M) | LP5521_RUN_G; } if (LP5521_B_IS_LOADING(mode)) { mode = (mode & ~LP5521_MODE_B_M) | LP5521_RUN_B; exec = (exec & ~LP5521_EXEC_B_M) | LP5521_RUN_B; } lp55xx_write(chip, LP5521_REG_OP_MODE, mode); lp5521_wait_opmode_done(); lp55xx_update_bits(chip, LP5521_REG_ENABLE, LP5521_EXEC_M, exec); lp5521_wait_enable_done(); } static int lp5521_update_program_memory(struct lp55xx_chip *chip, const u8 *data, size_t size) { enum lp55xx_engine_index idx = chip->engine_idx; u8 pattern[LP5521_PROGRAM_LENGTH] = {0}; static const u8 addr[] = { [LP55XX_ENGINE_1] = LP5521_REG_R_PROG_MEM, [LP55XX_ENGINE_2] = LP5521_REG_G_PROG_MEM, [LP55XX_ENGINE_3] = LP5521_REG_B_PROG_MEM, }; unsigned cmd; char c[3]; int nrchars; int ret; int offset = 0; int i = 0; while ((offset < size - 1) && (i < LP5521_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 < LP5521_PROGRAM_LENGTH; i++) { ret = lp55xx_write(chip, addr[idx] + i, pattern[i]); if (ret) return -EINVAL; } return size; err: dev_err(&chip->cl->dev, "wrong pattern format\n"); return -EINVAL; } static void lp5521_firmware_loaded(struct lp55xx_chip *chip) { const struct firmware *fw = chip->fw; if (fw->size > LP5521_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 */ lp5521_load_engine(chip); lp5521_update_program_memory(chip, fw->data, fw->size); } static int lp5521_post_init_device(struct lp55xx_chip *chip) { int ret; u8 val; /* * Make sure that the chip is reset by reading back the r channel * current reg. This is dummy read is required on some platforms - * otherwise further access to the R G B channels in the * LP5521_REG_ENABLE register will not have any effect - strange! */ ret = lp55xx_read(chip, LP5521_REG_R_CURRENT, &val); if (ret) { dev_err(&chip->cl->dev, "error in resetting chip\n"); return ret; } if (val != LP5521_REG_R_CURR_DEFAULT) { dev_err(&chip->cl->dev, "unexpected data in register (expected 0x%x got 0x%x)\n", LP5521_REG_R_CURR_DEFAULT, val); ret = -EINVAL; return ret; } usleep_range(10000, 20000); /* Set all PWMs to direct control mode */ ret = lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); /* Update configuration for the clock setting */ val = LP5521_DEFAULT_CFG; if (!lp55xx_is_extclk_used(chip)) val |= LP5521_CLK_INT; ret = lp55xx_write(chip, LP5521_REG_CONFIG, val); if (ret) return ret; /* Initialize all channels PWM to zero -> leds off */ lp55xx_write(chip, LP5521_REG_R_PWM, 0); lp55xx_write(chip, LP5521_REG_G_PWM, 0); lp55xx_write(chip, LP5521_REG_B_PWM, 0); /* Set engines are set to run state when OP_MODE enables engines */ ret = lp55xx_write(chip, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM); if (ret) return ret; lp5521_wait_enable_done(); return 0; } static int lp5521_run_selftest(struct lp55xx_chip *chip, char *buf) { struct lp55xx_platform_data *pdata = chip->pdata; int ret; u8 status; ret = lp55xx_read(chip, LP5521_REG_STATUS, &status); if (ret < 0) return ret; if (pdata->clock_mode != LP55XX_CLOCK_EXT) return 0; /* Check that ext clock is really in use if requested */ if ((status & LP5521_EXT_CLK_USED) == 0) return -EIO; return 0; } static int lp5521_led_brightness(struct lp55xx_led *led) { struct lp55xx_chip *chip = led->chip; int ret; mutex_lock(&chip->lock); ret = lp55xx_write(chip, LP5521_REG_LED_PWM_BASE + led->chan_nr, led->brightness); mutex_unlock(&chip->lock); return ret; } 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)) { lp5521_run_engine(chip, true); engine->mode = LP55XX_ENGINE_RUN; } else if (!strncmp(buf, "load", 4)) { lp5521_stop_engine(chip); lp5521_load_engine(chip); engine->mode = LP55XX_ENGINE_LOAD; } else if (!strncmp(buf, "disabled", 8)) { lp5521_stop_engine(chip); engine->mode = LP55XX_ENGINE_DISABLED; } mutex_unlock(&chip->lock); return len; } store_mode(1) store_mode(2) store_mode(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; lp5521_load_engine(chip); ret = lp5521_update_program_memory(chip, buf, len); mutex_unlock(&chip->lock); return ret; } store_load(1) store_load(2) store_load(3) static ssize_t lp5521_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; int ret; mutex_lock(&chip->lock); ret = lp5521_run_selftest(chip, buf); mutex_unlock(&chip->lock); return scnprintf(buf, PAGE_SIZE, "%s\n", ret ? "FAIL" : "OK"); } /* device attributes */ 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_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, lp5521_selftest); static struct attribute *lp5521_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_selftest.attr, NULL }; static const struct attribute_group lp5521_group = { .attrs = lp5521_attributes, }; /* Chip specific configurations */ static struct lp55xx_device_config lp5521_cfg = { .reset = { .addr = LP5521_REG_RESET, .val = LP5521_RESET, }, .enable = { .addr = LP5521_REG_ENABLE, .val = LP5521_ENABLE_DEFAULT, }, .max_channel = LP5521_MAX_LEDS, .post_init_device = lp5521_post_init_device, .brightness_fn = lp5521_led_brightness, .set_led_current = lp5521_set_led_current, .firmware_cb = lp5521_firmware_loaded, .run_engine = lp5521_run_engine, .dev_attr_group = &lp5521_group, }; static int lp5521_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 = &lp5521_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 lp5521_remove(struct i2c_client *client) { struct lp55xx_led *led = i2c_get_clientdata(client); struct lp55xx_chip *chip = led->chip; lp5521_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 lp5521_id[] = { { "lp5521", 0 }, /* Three channel chip */ { } }; MODULE_DEVICE_TABLE(i2c, lp5521_id); #ifdef CONFIG_OF static const struct of_device_id of_lp5521_leds_match[] = { { .compatible = "national,lp5521", }, {}, }; MODULE_DEVICE_TABLE(of, of_lp5521_leds_match); #endif static struct i2c_driver lp5521_driver = { .driver = { .name = "lp5521", .of_match_table = of_match_ptr(of_lp5521_leds_match), }, .probe = lp5521_probe, .remove = lp5521_remove, .id_table = lp5521_id, }; module_i2c_driver(lp5521_driver); MODULE_AUTHOR("Mathias Nyman, Yuri Zaporozhets, Samu Onkalo"); MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); MODULE_DESCRIPTION("LP5521 LED engine"); MODULE_LICENSE("GPL v2");
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