[PATCH v9 13/15] leds: lp55xx: Update the lp55xx to use the multi color framework

From: Dan Murphy
Date: Wed Sep 25 2019 - 13:41:31 EST

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Next in thread: Jacek Anaszewski: "Re: [PATCH v9 13/15] leds: lp55xx: Update the lp55xx to use the multi color framework"
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Update the lp5523 to allow the use of the multi color framework.

Signed-off-by: Dan Murphy <dmurphy@xxxxxx>
---
drivers/leds/Kconfig | 1 +
drivers/leds/leds-lp5523.c | 13 ++
drivers/leds/leds-lp55xx-common.c | 150 ++++++++++++++++++----
drivers/leds/leds-lp55xx-common.h | 11 ++
include/linux/platform_data/leds-lp55xx.h | 6 +
5 files changed, 157 insertions(+), 24 deletions(-)

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 84f60e35c5ee..dc3d9f2194cd 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 LEDS_CLASS_MULTI_COLOR && OF
select FW_LOADER
select FW_LOADER_USER_HELPER
help
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index d0b931a136b9..8b2cdb98fed6 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -791,6 +791,18 @@ static ssize_t store_master_fader_leds(struct device *dev,
return ret;
}

+static int lp5523_led_intensity(struct lp55xx_led *led, int chan_num)
+{
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+
+ mutex_lock(&chip->lock);
+ ret = lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + chan_num,
+ led->brightness);
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
static int lp5523_led_brightness(struct lp55xx_led *led)
{
struct lp55xx_chip *chip = led->chip;
@@ -857,6 +869,7 @@ static struct lp55xx_device_config lp5523_cfg = {
.max_channel = LP5523_MAX_LEDS,
.post_init_device = lp5523_post_init_device,
.brightness_fn = lp5523_led_brightness,
+ .color_intensity_fn = lp5523_led_intensity,
.set_led_current = lp5523_set_led_current,
.firmware_cb = lp5523_firmware_loaded,
.run_engine = lp5523_run_engine,
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index 44ced02b49f9..0e4b3a9d3047 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -136,9 +136,26 @@ static int lp55xx_set_brightness(struct led_classdev *cdev,
{
struct lp55xx_led *led = cdev_to_lp55xx_led(cdev);
struct lp55xx_device_config *cfg = led->chip->cfg;
+ int brightness_val[LP55XX_MAX_GROUPED_CHAN];
+ int ret;
+ int i;
+
+ if (led->mc_cdev.num_leds > 1) {
+ led_mc_calc_brightness(&led->mc_cdev,
+ brightness, brightness_val);
+ for (i = 0; i < led->mc_cdev.num_leds; i++) {
+ led->brightness = brightness_val[i];
+ ret = cfg->color_intensity_fn(led,
+ led->grouped_channels[i]);
+ if (ret)
+ break;
+ }
+ } else {
+ led->brightness = (u8)brightness;
+ ret = cfg->brightness_fn(led);
+ }

- led->brightness = (u8)brightness;
- return cfg->brightness_fn(led);
+ return ret;
}

static int lp55xx_init_led(struct lp55xx_led *led,
@@ -147,9 +164,9 @@ 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 +176,37 @@ 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->channel_color,
+ pdata->led_config[chan].channel_color,
+ sizeof(led->channel_color));
+ memcpy(led->grouped_channels,
+ pdata->led_config[chan].grouped_channels,
+ sizeof(led->grouped_channels));
+ } 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 +214,11 @@ 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 +503,6 @@ 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 +574,76 @@ 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)
+{
+ 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].grouped_channels[cfg[chan_num].num_colors]
+ = 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;
+ 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);
+ if (ret)
+ return ret;
+ ret = of_property_read_u32(child, "color", &color_id);
+ if (ret)
+ return ret;
+
+ cfg[child_number].channel_color[cfg[child_number].num_colors] =
+ color_id;
+ set_bit(color_id, &cfg[child_number].available_colors);
+
+ cfg[child_number].num_colors++;
+ }
+ } else {
+ return lp5xx_parse_common_child(np, cfg, child_number, false);
+ }
+
+ return 0;
+}
+
struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
struct device_node *np)
{
@@ -546,6 +652,7 @@ 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 +672,9 @@ 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..d93813a72ec1 100644
--- a/drivers/leds/leds-lp55xx-common.h
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -12,6 +12,10 @@
#ifndef _LEDS_LP55XX_COMMON_H
#define _LEDS_LP55XX_COMMON_H

+#include <linux/led-class-multicolor.h>
+
+#define LP55XX_MAX_GROUPED_CHAN 4
+
enum lp55xx_engine_index {
LP55XX_ENGINE_INVALID,
LP55XX_ENGINE_1,
@@ -109,6 +113,9 @@ 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, int chan_num);
+
/* current setting function */
void (*set_led_current) (struct lp55xx_led *led, u8 led_current);

@@ -159,6 +166,7 @@ struct lp55xx_chip {
* struct lp55xx_led
* @chan_nr : Channel number
* @cdev : LED class device
+ * @mc_cdev : Multi color class device
* @led_current : Current setting at each led channel
* @max_current : Maximun current at each led channel
* @brightness : Brightness value
@@ -167,9 +175,12 @@ struct lp55xx_chip {
struct lp55xx_led {
int chan_nr;
struct led_classdev cdev;
+ struct led_classdev_mc mc_cdev;
u8 led_current;
u8 max_current;
u8 brightness;
+ int channel_color[LP55XX_MAX_GROUPED_CHAN];
+ int grouped_channels[LP55XX_MAX_GROUPED_CHAN];
struct lp55xx_chip *chip;
};

diff --git a/include/linux/platform_data/leds-lp55xx.h b/include/linux/platform_data/leds-lp55xx.h
index 96a787100fda..0ac29f537ab6 100644
--- a/include/linux/platform_data/leds-lp55xx.h
+++ b/include/linux/platform_data/leds-lp55xx.h
@@ -12,6 +12,8 @@
#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
@@ -23,6 +25,10 @@ struct lp55xx_led_config {
u8 chan_nr;
u8 led_current; /* mA x10, 0 if led is not connected */
u8 max_current;
+ int num_colors;
+ unsigned long available_colors;
+ u32 channel_color[LED_COLOR_ID_MAX];
+ int grouped_channels[LED_COLOR_ID_MAX];
};

struct lp55xx_predef_pattern {
--
2.22.0.214.g8dca754b1e

Next message: Dan Murphy: "[PATCH v9 00/15] Multicolor Framework"
Previous message: Dan Murphy: "[PATCH v9 14/15] leds: lp55xx: Fix checkpatch file permissions issues"
In reply to: Dan Murphy: "[PATCH v9 14/15] leds: lp55xx: Fix checkpatch file permissions issues"
Next in thread: Jacek Anaszewski: "Re: [PATCH v9 13/15] leds: lp55xx: Update the lp55xx to use the multi color framework"
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