| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kim (Woogyom) Milo | 2224 | 67.27% | 22 | 59.46% |
| Dan Murphy | 851 | 25.74% | 2 | 5.41% |
| Linus Walleij | 150 | 4.54% | 3 | 8.11% |
| Andrew Lunn | 18 | 0.54% | 1 | 2.70% |
| Marek Behún | 17 | 0.51% | 2 | 5.41% |
| Sebastian Reichel | 17 | 0.51% | 1 | 2.70% |
| Merlijn Wajer | 10 | 0.30% | 1 | 2.70% |
| Michal Kazior | 7 | 0.21% | 1 | 2.70% |
| Johan Hovold | 6 | 0.18% | 1 | 2.70% |
| Kees Cook | 3 | 0.09% | 1 | 2.70% |
| Thomas Gleixner | 2 | 0.06% | 1 | 2.70% |
| Pavel Machek | 1 | 0.03% | 1 | 2.70% |
| Total | 3306 | 37 |
// SPDX-License-Identifier: GPL-2.0-only /* * LP5521/LP5523/LP55231/LP5562 Common Driver * * Copyright 2012 Texas Instruments * * Author: Milo(Woogyom) Kim <milo.kim@ti.com> * * Derived from leds-lp5521.c, leds-lp5523.c */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/firmware.h> #include <linux/i2c.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/platform_data/leds-lp55xx.h> #include <linux/slab.h> #include <linux/gpio/consumer.h> #include "leds-lp55xx-common.h" /* External clock rate */ #define LP55XX_CLK_32K 32768 static struct lp55xx_led *cdev_to_lp55xx_led(struct led_classdev *cdev) { return container_of(cdev, struct lp55xx_led, cdev); } static struct lp55xx_led *dev_to_lp55xx_led(struct device *dev) { return cdev_to_lp55xx_led(dev_get_drvdata(dev)); } static struct lp55xx_led *mcled_cdev_to_led(struct led_classdev_mc *mc_cdev) { return container_of(mc_cdev, struct lp55xx_led, mc_cdev); } static void lp55xx_reset_device(struct lp55xx_chip *chip) { struct lp55xx_device_config *cfg = chip->cfg; u8 addr = cfg->reset.addr; u8 val = cfg->reset.val; /* no error checking here because no ACK from the device after reset */ lp55xx_write(chip, addr, val); } static int lp55xx_detect_device(struct lp55xx_chip *chip) { struct lp55xx_device_config *cfg = chip->cfg; u8 addr = cfg->enable.addr; u8 val = cfg->enable.val; int ret; ret = lp55xx_write(chip, addr, val); if (ret) return ret; usleep_range(1000, 2000); ret = lp55xx_read(chip, addr, &val); if (ret) return ret; if (val != cfg->enable.val) return -ENODEV; return 0; } static int lp55xx_post_init_device(struct lp55xx_chip *chip) { struct lp55xx_device_config *cfg = chip->cfg; if (!cfg->post_init_device) return 0; return cfg->post_init_device(chip); } static ssize_t led_current_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lp55xx_led *led = dev_to_lp55xx_led(dev); return scnprintf(buf, PAGE_SIZE, "%d\n", led->led_current); } static ssize_t led_current_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct lp55xx_led *led = dev_to_lp55xx_led(dev); struct lp55xx_chip *chip = led->chip; unsigned long curr; if (kstrtoul(buf, 0, &curr)) return -EINVAL; if (curr > led->max_current) return -EINVAL; if (!chip->cfg->set_led_current) return len; mutex_lock(&chip->lock); chip->cfg->set_led_current(led, (u8)curr); mutex_unlock(&chip->lock); return len; } static ssize_t max_current_show(struct device *dev, struct device_attribute *attr, char *buf) { struct lp55xx_led *led = dev_to_lp55xx_led(dev); return scnprintf(buf, PAGE_SIZE, "%d\n", led->max_current); } static DEVICE_ATTR_RW(led_current); static DEVICE_ATTR_RO(max_current); static struct attribute *lp55xx_led_attrs[] = { &dev_attr_led_current.attr, &dev_attr_max_current.attr, NULL, }; ATTRIBUTE_GROUPS(lp55xx_led); static int lp55xx_set_mc_brightness(struct led_classdev *cdev, enum led_brightness brightness) { struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev); struct lp55xx_led *led = mcled_cdev_to_led(mc_dev); struct lp55xx_device_config *cfg = led->chip->cfg; led_mc_calc_color_components(&led->mc_cdev, brightness); return cfg->multicolor_brightness_fn(led); } static int lp55xx_set_brightness(struct led_classdev *cdev, enum led_brightness brightness) { struct lp55xx_led *led = cdev_to_lp55xx_led(cdev); struct lp55xx_device_config *cfg = led->chip->cfg; led->brightness = (u8)brightness; return cfg->brightness_fn(led); } static int lp55xx_init_led(struct lp55xx_led *led, struct lp55xx_chip *chip, int chan) { struct lp55xx_platform_data *pdata = chip->pdata; struct lp55xx_device_config *cfg = chip->cfg; struct device *dev = &chip->cl->dev; int max_channel = cfg->max_channel; struct mc_subled *mc_led_info; struct led_classdev *led_cdev; char name[32]; int i, j = 0; int ret; if (chan >= max_channel) { dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel); return -EINVAL; } if (pdata->led_config[chan].led_current == 0) return 0; if (pdata->led_config[chan].name) { led->cdev.name = pdata->led_config[chan].name; } else { snprintf(name, sizeof(name), "%s:channel%d", pdata->label ? : chip->cl->name, chan); led->cdev.name = name; } if (pdata->led_config[chan].num_colors > 1) { mc_led_info = devm_kcalloc(dev, pdata->led_config[chan].num_colors, sizeof(*mc_led_info), GFP_KERNEL); if (!mc_led_info) return -ENOMEM; led_cdev = &led->mc_cdev.led_cdev; led_cdev->name = led->cdev.name; led_cdev->brightness_set_blocking = lp55xx_set_mc_brightness; led->mc_cdev.num_colors = pdata->led_config[chan].num_colors; for (i = 0; i < led->mc_cdev.num_colors; i++) { mc_led_info[i].color_index = pdata->led_config[chan].color_id[i]; mc_led_info[i].channel = pdata->led_config[chan].output_num[i]; j++; } led->mc_cdev.subled_info = mc_led_info; } else { led->cdev.brightness_set_blocking = lp55xx_set_brightness; } led->cdev.groups = lp55xx_led_groups; led->cdev.default_trigger = pdata->led_config[chan].default_trigger; led->led_current = pdata->led_config[chan].led_current; led->max_current = pdata->led_config[chan].max_current; led->chan_nr = pdata->led_config[chan].chan_nr; if (led->chan_nr >= max_channel) { dev_err(dev, "Use channel numbers between 0 and %d\n", max_channel - 1); return -EINVAL; } if (pdata->led_config[chan].num_colors > 1) ret = devm_led_classdev_multicolor_register(dev, &led->mc_cdev); else ret = devm_led_classdev_register(dev, &led->cdev); if (ret) { dev_err(dev, "led register err: %d\n", ret); return ret; } return 0; } static void lp55xx_firmware_loaded(const struct firmware *fw, void *context) { struct lp55xx_chip *chip = context; struct device *dev = &chip->cl->dev; enum lp55xx_engine_index idx = chip->engine_idx; if (!fw) { dev_err(dev, "firmware request failed\n"); return; } /* handling firmware data is chip dependent */ mutex_lock(&chip->lock); chip->engines[idx - 1].mode = LP55XX_ENGINE_LOAD; chip->fw = fw; if (chip->cfg->firmware_cb) chip->cfg->firmware_cb(chip); mutex_unlock(&chip->lock); /* firmware should be released for other channel use */ release_firmware(chip->fw); chip->fw = NULL; } static int lp55xx_request_firmware(struct lp55xx_chip *chip) { const char *name = chip->cl->name; struct device *dev = &chip->cl->dev; return request_firmware_nowait(THIS_MODULE, false, name, dev, GFP_KERNEL, chip, lp55xx_firmware_loaded); } static ssize_t select_engine_show(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; return sprintf(buf, "%d\n", chip->engine_idx); } static ssize_t select_engine_store(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; unsigned long val; int ret; if (kstrtoul(buf, 0, &val)) return -EINVAL; /* select the engine to be run */ switch (val) { case LP55XX_ENGINE_1: case LP55XX_ENGINE_2: case LP55XX_ENGINE_3: mutex_lock(&chip->lock); chip->engine_idx = val; ret = lp55xx_request_firmware(chip); mutex_unlock(&chip->lock); break; default: dev_err(dev, "%lu: invalid engine index. (1, 2, 3)\n", val); return -EINVAL; } if (ret) { dev_err(dev, "request firmware err: %d\n", ret); return ret; } return len; } static inline void lp55xx_run_engine(struct lp55xx_chip *chip, bool start) { if (chip->cfg->run_engine) chip->cfg->run_engine(chip, start); } static ssize_t run_engine_store(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; unsigned long val; if (kstrtoul(buf, 0, &val)) return -EINVAL; /* run or stop the selected engine */ if (val <= 0) { lp55xx_run_engine(chip, false); return len; } mutex_lock(&chip->lock); lp55xx_run_engine(chip, true); mutex_unlock(&chip->lock); return len; } static DEVICE_ATTR_RW(select_engine); static DEVICE_ATTR_WO(run_engine); static struct attribute *lp55xx_engine_attributes[] = { &dev_attr_select_engine.attr, &dev_attr_run_engine.attr, NULL, }; static const struct attribute_group lp55xx_engine_attr_group = { .attrs = lp55xx_engine_attributes, }; int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val) { return i2c_smbus_write_byte_data(chip->cl, reg, val); } EXPORT_SYMBOL_GPL(lp55xx_write); int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val) { s32 ret; ret = i2c_smbus_read_byte_data(chip->cl, reg); if (ret < 0) return ret; *val = ret; return 0; } EXPORT_SYMBOL_GPL(lp55xx_read); int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, u8 mask, u8 val) { int ret; u8 tmp; ret = lp55xx_read(chip, reg, &tmp); if (ret) return ret; tmp &= ~mask; tmp |= val & mask; return lp55xx_write(chip, reg, tmp); } EXPORT_SYMBOL_GPL(lp55xx_update_bits); bool lp55xx_is_extclk_used(struct lp55xx_chip *chip) { struct clk *clk; int err; clk = devm_clk_get(&chip->cl->dev, "32k_clk"); if (IS_ERR(clk)) goto use_internal_clk; err = clk_prepare_enable(clk); if (err) goto use_internal_clk; if (clk_get_rate(clk) != LP55XX_CLK_32K) { clk_disable_unprepare(clk); goto use_internal_clk; } dev_info(&chip->cl->dev, "%dHz external clock used\n", LP55XX_CLK_32K); chip->clk = clk; return true; use_internal_clk: dev_info(&chip->cl->dev, "internal clock used\n"); return false; } EXPORT_SYMBOL_GPL(lp55xx_is_extclk_used); int lp55xx_init_device(struct lp55xx_chip *chip) { struct lp55xx_platform_data *pdata; struct lp55xx_device_config *cfg; struct device *dev = &chip->cl->dev; int ret = 0; WARN_ON(!chip); pdata = chip->pdata; cfg = chip->cfg; if (!pdata || !cfg) return -EINVAL; if (pdata->enable_gpiod) { gpiod_direction_output(pdata->enable_gpiod, 0); gpiod_set_consumer_name(pdata->enable_gpiod, "LP55xx enable"); gpiod_set_value(pdata->enable_gpiod, 0); usleep_range(1000, 2000); /* Keep enable down at least 1ms */ gpiod_set_value(pdata->enable_gpiod, 1); usleep_range(1000, 2000); /* 500us abs min. */ } lp55xx_reset_device(chip); /* * Exact value is not available. 10 - 20ms * appears to be enough for reset. */ usleep_range(10000, 20000); ret = lp55xx_detect_device(chip); if (ret) { dev_err(dev, "device detection err: %d\n", ret); goto err; } /* chip specific initialization */ ret = lp55xx_post_init_device(chip); if (ret) { dev_err(dev, "post init device err: %d\n", ret); goto err_post_init; } return 0; err_post_init: lp55xx_deinit_device(chip); err: return ret; } EXPORT_SYMBOL_GPL(lp55xx_init_device); void lp55xx_deinit_device(struct lp55xx_chip *chip) { struct lp55xx_platform_data *pdata = chip->pdata; if (chip->clk) clk_disable_unprepare(chip->clk); if (pdata->enable_gpiod) gpiod_set_value(pdata->enable_gpiod, 0); } EXPORT_SYMBOL_GPL(lp55xx_deinit_device); int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip) { struct lp55xx_platform_data *pdata = chip->pdata; struct lp55xx_device_config *cfg = chip->cfg; int num_channels = pdata->num_channels; struct lp55xx_led *each; u8 led_current; int ret; int i; if (!cfg->brightness_fn) { dev_err(&chip->cl->dev, "empty brightness configuration\n"); return -EINVAL; } for (i = 0; i < num_channels; i++) { /* do not initialize channels that are not connected */ if (pdata->led_config[i].led_current == 0) continue; led_current = pdata->led_config[i].led_current; each = led + i; ret = lp55xx_init_led(each, chip, i); if (ret) goto err_init_led; chip->num_leds++; each->chip = chip; /* setting led current at each channel */ if (cfg->set_led_current) cfg->set_led_current(each, led_current); } return 0; err_init_led: return ret; } EXPORT_SYMBOL_GPL(lp55xx_register_leds); int lp55xx_register_sysfs(struct lp55xx_chip *chip) { struct device *dev = &chip->cl->dev; struct lp55xx_device_config *cfg = chip->cfg; int ret; if (!cfg->run_engine || !cfg->firmware_cb) goto dev_specific_attrs; ret = sysfs_create_group(&dev->kobj, &lp55xx_engine_attr_group); if (ret) return ret; dev_specific_attrs: return cfg->dev_attr_group ? sysfs_create_group(&dev->kobj, cfg->dev_attr_group) : 0; } EXPORT_SYMBOL_GPL(lp55xx_register_sysfs); void lp55xx_unregister_sysfs(struct lp55xx_chip *chip) { struct device *dev = &chip->cl->dev; struct lp55xx_device_config *cfg = chip->cfg; if (cfg->dev_attr_group) sysfs_remove_group(&dev->kobj, cfg->dev_attr_group); sysfs_remove_group(&dev->kobj, &lp55xx_engine_attr_group); } EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs); static int lp55xx_parse_common_child(struct device_node *np, struct lp55xx_led_config *cfg, int led_number, int *chan_nr) { int ret; of_property_read_string(np, "chan-name", &cfg[led_number].name); of_property_read_u8(np, "led-cur", &cfg[led_number].led_current); of_property_read_u8(np, "max-cur", &cfg[led_number].max_current); ret = of_property_read_u32(np, "reg", chan_nr); if (ret) return ret; if (*chan_nr < 0 || *chan_nr > cfg->max_channel) return -EINVAL; return 0; } static int lp55xx_parse_multi_led_child(struct device_node *child, struct lp55xx_led_config *cfg, int child_number, int color_number) { int chan_nr, color_id, ret; ret = lp55xx_parse_common_child(child, cfg, child_number, &chan_nr); if (ret) return ret; ret = of_property_read_u32(child, "color", &color_id); if (ret) return ret; cfg[child_number].color_id[color_number] = color_id; cfg[child_number].output_num[color_number] = chan_nr; return 0; } static int lp55xx_parse_multi_led(struct device_node *np, struct lp55xx_led_config *cfg, int child_number) { struct device_node *child; int num_colors = 0, ret; for_each_available_child_of_node(np, child) { ret = lp55xx_parse_multi_led_child(child, cfg, child_number, num_colors); if (ret) { of_node_put(child); return ret; } num_colors++; } cfg[child_number].num_colors = num_colors; return 0; } static int lp55xx_parse_logical_led(struct device_node *np, struct lp55xx_led_config *cfg, int child_number) { int led_color, ret; int chan_nr = 0; cfg[child_number].default_trigger = of_get_property(np, "linux,default-trigger", NULL); ret = of_property_read_u32(np, "color", &led_color); if (ret) return ret; if (led_color == LED_COLOR_ID_RGB) return lp55xx_parse_multi_led(np, cfg, child_number); ret = lp55xx_parse_common_child(np, cfg, child_number, &chan_nr); if (ret < 0) return ret; cfg[child_number].chan_nr = chan_nr; return ret; } struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev, struct device_node *np, struct lp55xx_chip *chip) { struct device_node *child; struct lp55xx_platform_data *pdata; struct lp55xx_led_config *cfg; int num_channels; int i = 0; int ret; pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return ERR_PTR(-ENOMEM); num_channels = of_get_available_child_count(np); if (num_channels == 0) { dev_err(dev, "no LED channels\n"); return ERR_PTR(-EINVAL); } cfg = devm_kcalloc(dev, num_channels, sizeof(*cfg), GFP_KERNEL); if (!cfg) return ERR_PTR(-ENOMEM); pdata->led_config = &cfg[0]; pdata->num_channels = num_channels; cfg->max_channel = chip->cfg->max_channel; for_each_available_child_of_node(np, child) { ret = lp55xx_parse_logical_led(child, cfg, i); if (ret) { of_node_put(child); return ERR_PTR(-EINVAL); } i++; } of_property_read_string(np, "label", &pdata->label); of_property_read_u8(np, "clock-mode", &pdata->clock_mode); pdata->enable_gpiod = devm_gpiod_get_optional(dev, "enable", GPIOD_ASIS); if (IS_ERR(pdata->enable_gpiod)) return ERR_CAST(pdata->enable_gpiod); /* LP8501 specific */ of_property_read_u8(np, "pwr-sel", (u8 *)&pdata->pwr_sel); return pdata; } EXPORT_SYMBOL_GPL(lp55xx_of_populate_pdata); MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); MODULE_DESCRIPTION("LP55xx Common Driver"); MODULE_LICENSE("GPL");
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