Add multicolor framework support for the lp55xx family. Signed-off-by: Dan Murphy <dmurphy@xxxxxx> --- drivers/leds/Kconfig | 1 + drivers/leds/leds-lp55xx-common.c | 176 +++++++++++++++++++--- drivers/leds/leds-lp55xx-common.h | 9 ++ include/linux/platform_data/leds-lp55xx.h | 7 + 4 files changed, 169 insertions(+), 24 deletions(-) diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index fb614a6b9afa..5706bf8d8bd1 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -377,6 +377,7 @@ config LEDS_LP50XX config LEDS_LP55XX_COMMON tristate "Common Driver for TI/National LP5521/5523/55231/5562/8501" depends on LEDS_LP5521 || LEDS_LP5523 || LEDS_LP5562 || LEDS_LP8501 + depends on OF select FW_LOADER select FW_LOADER_USER_HELPER help diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c index 44ced02b49f9..1417df6df8a7 100644 --- a/drivers/leds/leds-lp55xx-common.c +++ b/drivers/leds/leds-lp55xx-common.c @@ -131,14 +131,54 @@ static struct attribute *lp55xx_led_attrs[] = { }; ATTRIBUTE_GROUPS(lp55xx_led); +static int lp55xx_map_channel(struct lp55xx_led *led, int color_id, + enum led_brightness brightness) +{ + int i; + + for (i = 0; i < led->mc_cdev.num_leds; i++) { + if (led->color_component[i].color_id == color_id) { + led->color_component[i].brightness = brightness; + return 0; + } + } + + return -EINVAL; +} + static int lp55xx_set_brightness(struct led_classdev *cdev, enum led_brightness brightness) { + struct led_mc_color_conversion color_component[LP55XX_MAX_GROUPED_CHAN]; struct lp55xx_led *led = cdev_to_lp55xx_led(cdev); struct lp55xx_device_config *cfg = led->chip->cfg; + int ret; + int i; - led->brightness = (u8)brightness; - return cfg->brightness_fn(led); + if (led->mc_cdev.num_leds > 1) { + if (!cfg->color_intensity_fn) + return -EINVAL; + + led_mc_calc_color_components(&led->mc_cdev, brightness, + color_component); + + for (i = 0; i < led->mc_cdev.num_leds; i++) { + ret = lp55xx_map_channel(led, + color_component[i].color_id, + color_component[i].brightness); + if (ret) + return ret; + } + + ret = cfg->color_intensity_fn(led); + if (ret) + return ret; + } else { + led->brightness = (u8)brightness; + ret = cfg->brightness_fn(led); + } + + return ret; } static int lp55xx_init_led(struct lp55xx_led *led, @@ -147,9 +187,9 @@ static int lp55xx_init_led(struct lp55xx_led *led, 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; char name[32]; int ret; - int max_channel = cfg->max_channel; if (chan >= max_channel) { dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel); @@ -159,10 +199,34 @@ static int lp55xx_init_led(struct lp55xx_led *led, 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) { + led->mc_cdev.led_cdev = &led->cdev; + led->cdev.brightness_set_blocking = lp55xx_set_brightness; + led->cdev.groups = lp55xx_led_groups; + led->mc_cdev.num_leds = pdata->led_config[chan].num_colors; + led->mc_cdev.available_colors = + pdata->led_config[chan].available_colors; + memcpy(led->color_component, + pdata->led_config[chan].color_component, + sizeof(led->color_component)); + } else { + + led->cdev.default_trigger = + pdata->led_config[chan].default_trigger; + led->cdev.brightness_set_blocking = lp55xx_set_brightness; + } led->cdev.groups = lp55xx_led_groups; + 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; - led->cdev.default_trigger = pdata->led_config[chan].default_trigger; if (led->chan_nr >= max_channel) { dev_err(dev, "Use channel numbers between 0 and %d\n", @@ -170,18 +234,11 @@ static int lp55xx_init_led(struct lp55xx_led *led, return -EINVAL; } - led->cdev.brightness_set_blocking = lp55xx_set_brightness; - led->cdev.groups = lp55xx_led_groups; - - 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) + ret = led_classdev_multicolor_register(dev, &led->mc_cdev); + else + ret = led_classdev_register(dev, &led->cdev); - ret = led_classdev_register(dev, &led->cdev); if (ret) { dev_err(dev, "led register err: %d\n", ret); return ret; @@ -466,7 +523,6 @@ int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip) 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 */ @@ -538,6 +594,82 @@ void lp55xx_unregister_sysfs(struct lp55xx_chip *chip) } EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs); +static int lp5xx_parse_common_child(struct device_node *np, + struct lp55xx_led_config *cfg, + int chan_num, bool is_multicolor, + int color_num) +{ + u32 led_number; + int ret; + + of_property_read_string(np, "chan-name", + &cfg[chan_num].name); + of_property_read_u8(np, "led-cur", + &cfg[chan_num].led_current); + of_property_read_u8(np, "max-cur", + &cfg[chan_num].max_current); + + ret = of_property_read_u32(np, "reg", &led_number); + if (ret) + return ret; + + if (led_number < 0 || led_number > 6) + return -EINVAL; + + if (is_multicolor) + cfg[chan_num].color_component[color_num].output_num = + led_number; + else + cfg[chan_num].chan_nr = led_number; + + return 0; +} + +static int lp5xx_parse_channel_child(struct device_node *np, + struct lp55xx_led_config *cfg, + int child_number) +{ + struct device_node *child; + int channel_color; + int num_colors = 0; + u32 color_id; + int ret; + + cfg[child_number].default_trigger = + of_get_property(np, "linux,default-trigger", NULL); + + ret = of_property_read_u32(np, "color", &channel_color); + if (ret) + channel_color = ret; + + + if (channel_color == LED_COLOR_ID_MULTI) { + for_each_child_of_node(np, child) { + ret = lp5xx_parse_common_child(child, cfg, + child_number, true, + num_colors); + if (ret) + return ret; + + ret = of_property_read_u32(child, "color", &color_id); + if (ret) + return ret; + + cfg[child_number].color_component[num_colors].color_id = + color_id; + set_bit(color_id, &cfg[child_number].available_colors); + num_colors++; + } + + cfg[child_number].num_colors = num_colors; + } else { + return lp5xx_parse_common_child(np, cfg, child_number, false, + num_colors); + } + + return 0; +} + struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev, struct device_node *np) { @@ -546,6 +678,7 @@ struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev, struct lp55xx_led_config *cfg; int num_channels; int i = 0; + int ret; pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) @@ -565,14 +698,9 @@ struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev, pdata->num_channels = num_channels; for_each_child_of_node(np, child) { - cfg[i].chan_nr = i; - - of_property_read_string(child, "chan-name", &cfg[i].name); - of_property_read_u8(child, "led-cur", &cfg[i].led_current); - of_property_read_u8(child, "max-cur", &cfg[i].max_current); - cfg[i].default_trigger = - of_get_property(child, "linux,default-trigger", NULL); - + ret = lp5xx_parse_channel_child(child, cfg, i); + if (ret) + return ERR_PTR(-EINVAL); i++; } diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h index 783ed5103ce5..75d57fb835c3 100644 --- a/drivers/leds/leds-lp55xx-common.h +++ b/drivers/leds/leds-lp55xx-common.h @@ -12,6 +12,8 @@ #ifndef _LEDS_LP55XX_COMMON_H #define _LEDS_LP55XX_COMMON_H +#include <linux/led-class-multicolor.h> + enum lp55xx_engine_index { LP55XX_ENGINE_INVALID, LP55XX_ENGINE_1, @@ -109,6 +111,9 @@ struct lp55xx_device_config { /* access brightness register */ int (*brightness_fn)(struct lp55xx_led *led); + /* access specific brightness register */ + int (*color_intensity_fn)(struct lp55xx_led *led); + /* current setting function */ void (*set_led_current) (struct lp55xx_led *led, u8 led_current); @@ -159,6 +164,8 @@ struct lp55xx_chip { * struct lp55xx_led * @chan_nr : Channel number * @cdev : LED class device + * @mc_cdev : Multi color class device + * @color_component : Multi color LED map information * @led_current : Current setting at each led channel * @max_current : Maximun current at each led channel * @brightness : Brightness value @@ -167,6 +174,8 @@ struct lp55xx_chip { struct lp55xx_led { int chan_nr; struct led_classdev cdev; + struct led_classdev_mc mc_cdev; + struct led_mc_color_conversion color_component[LP55XX_MAX_GROUPED_CHAN]; u8 led_current; u8 max_current; u8 brightness; diff --git a/include/linux/platform_data/leds-lp55xx.h b/include/linux/platform_data/leds-lp55xx.h index 96a787100fda..0f9b88019c18 100644 --- a/include/linux/platform_data/leds-lp55xx.h +++ b/include/linux/platform_data/leds-lp55xx.h @@ -12,17 +12,24 @@ #ifndef _LEDS_LP55XX_H #define _LEDS_LP55XX_H +#include <linux/led-class-multicolor.h> + /* Clock configuration */ #define LP55XX_CLOCK_AUTO 0 #define LP55XX_CLOCK_INT 1 #define LP55XX_CLOCK_EXT 2 +#define LP55XX_MAX_GROUPED_CHAN 4 + struct lp55xx_led_config { const char *name; const char *default_trigger; u8 chan_nr; u8 led_current; /* mA x10, 0 if led is not connected */ u8 max_current; + int num_colors; + unsigned long available_colors; + struct led_mc_color_conversion color_component[LP55XX_MAX_GROUPED_CHAN]; }; struct lp55xx_predef_pattern { -- 2.22.0.214.g8dca754b1e