[PATCH v3 9/9] leds: Update the lp55xx to use the multi color framework

From: Dan Murphy
Date: Thu May 23 2019 - 15:54:35 EST

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Update the lp5523 to use the multi color framework.

Signed-off-by: Dan Murphy <dmurphy@xxxxxx>
---
drivers/leds/leds-lp5523.c | 13 +++
drivers/leds/leds-lp55xx-common.c | 133 ++++++++++++++++++----
drivers/leds/leds-lp55xx-common.h | 10 ++
include/linux/platform_data/leds-lp55xx.h | 5 +
4 files changed, 142 insertions(+), 19 deletions(-)

diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index fd64df5a57a5..dbcc4d100054 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -804,6 +804,18 @@ 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;
@@ -870,6 +882,7 @@ static struct lp55xx_device_config lp5523_cfg = {
.max_channel = LP5523_MAX_LEDS,
.post_init_device = lp5523_post_init_device,
.brightness_fn = lp5523_led_brightness,
+ .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 723f2f17497a..b54fbb8f78c6 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -38,6 +38,11 @@ static struct lp55xx_led *dev_to_lp55xx_led(struct device *dev)
return cdev_to_lp55xx_led(dev_get_drvdata(dev));
}

+static struct lp55xx_led *mcdev_to_lp55xx_led(struct led_classdev_mc *mc_dev)
+{
+ return container_of(mc_dev, struct lp55xx_led, mc_cdev);
+}
+
static void lp55xx_reset_device(struct lp55xx_chip *chip)
{
struct lp55xx_device_config *cfg = chip->cfg;
@@ -141,15 +146,36 @@ static int lp55xx_set_brightness(struct led_classdev *cdev,
struct lp55xx_device_config *cfg = led->chip->cfg;

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

+static int lp55xx_set_color(struct led_classdev_mc *mcled_cdev,
+ int color, int value)
+{
+ struct lp55xx_led *led = mcdev_to_lp55xx_led(mcled_cdev);
+ struct lp55xx_device_config *cfg = led->chip->cfg;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(led->channel_color); i++)
+ if (led->channel_color[i] == color)
+ break;
+
+ led->brightness = (u8)value;
+ return cfg->intensity_fn(led, led->grouped_channels[i]);
+}
+
+static struct led_multicolor_ops lp55xx_mc_ops = {
+ .set_color_brightness = lp55xx_set_color,
+};
+
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;
+ struct led_classdev *led_cdev;
char name[32];
int ret;
int max_channel = cfg->max_channel;
@@ -162,10 +188,39 @@ 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_cdev = &led->mc_cdev.led_cdev;
+ led_cdev->brightness_set_blocking = lp55xx_set_brightness;
+ led_cdev->name = led->cdev.name;
+ led_cdev->groups = lp55xx_led_groups;
+ led->mc_cdev.ops = &lp55xx_mc_ops;
+ led->mc_cdev.num_leds = pdata->led_config[chan].num_colors;
+ memcpy(led->mc_cdev.available_colors,
+ pdata->led_config[chan].channel_color,
+ sizeof(led->mc_cdev.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",
@@ -173,18 +228,11 @@ 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;
@@ -541,6 +589,38 @@ void lp55xx_unregister_sysfs(struct lp55xx_chip *chip)
}
EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs);

+static int lp5xx_parse_channel_child(struct device_node *np,
+ struct lp55xx_led_config *cfg,
+ int chan_num)
+{
+ struct device_node *child;
+ int num_colors = 0;
+ u32 color_id;
+ u32 led_number;
+ int ret;
+
+ cfg[chan_num].default_trigger =
+ of_get_property(np, "linux,default-trigger", NULL);
+
+ for_each_child_of_node(np, child) {
+ of_property_read_string(child, "chan-name",
+ &cfg[chan_num].name);
+ of_property_read_u8(child, "led-cur",
+ &cfg[chan_num].led_current);
+ of_property_read_u8(child, "max-cur",
+ &cfg[chan_num].max_current);
+ of_property_read_u32(child, "color", &color_id);
+ cfg[chan_num].channel_color[num_colors] = color_id;
+ ret = of_property_read_u32(child, "reg", &led_number);
+ cfg[chan_num].grouped_channels[num_colors] = led_number;
+ num_colors++;
+ }
+
+ cfg->num_colors = num_colors;
+
+ return 0;
+}
+
struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
struct device_node *np)
{
@@ -548,6 +628,8 @@ struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev,
struct lp55xx_platform_data *pdata;
struct lp55xx_led_config *cfg;
int num_channels;
+ int num_chan_children;
+ u32 led_number;
int i = 0;

pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
@@ -568,13 +650,26 @@ 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);
+ num_chan_children = of_get_child_count(child);
+ if (num_chan_children != 0)
+ lp5xx_parse_channel_child(child, cfg, i);
+ else {
+ 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);
+ of_property_read_u32(child, "reg", &led_number);
+
+ if (led_number < 0 || led_number > 6)
+ return ERR_PTR(EINVAL);
+
+ cfg[i].chan_nr = led_number;
+ }

i++;
}
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h
index abf1fb5da37d..cd28ec2c78a5 100644
--- a/drivers/leds/leds-lp55xx-common.h
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -15,6 +15,8 @@
#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,
@@ -112,6 +114,9 @@ struct lp55xx_device_config {
/* access brightness register */
int (*brightness_fn)(struct lp55xx_led *led);

+ /* access brightness register */
+ int (*intensity_fn)(struct lp55xx_led *led, int chan_num);
+
/* current setting function */
void (*set_led_current) (struct lp55xx_led *led, u8 led_current);

@@ -162,6 +167,7 @@ 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
@@ -170,9 +176,13 @@ 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 num_colors;
+ int channel_color[10];
+ int grouped_channels[10];
struct lp55xx_chip *chip;
};

diff --git a/include/linux/platform_data/leds-lp55xx.h b/include/linux/platform_data/leds-lp55xx.h
index 624ff9edad6f..bde6827f1aea 100644
--- a/include/linux/platform_data/leds-lp55xx.h
+++ b/include/linux/platform_data/leds-lp55xx.h
@@ -15,6 +15,8 @@
#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
@@ -26,6 +28,9 @@ struct lp55xx_led_config {
u8 chan_nr;
u8 led_current; /* mA x10, 0 if led is not connected */
u8 max_current;
+ int num_colors;
+ int channel_color[10];
+ int grouped_channels[10];
};

struct lp55xx_predef_pattern {
--
2.21.0.5.gaeb582a983

Next message: Dan Murphy: "[PATCH v3 3/9] documention: leds: Add multicolor class documentation"
Previous message: Dan Murphy: "[PATCH v3 6/9] leds: multicolor: Introduce a multicolor class definition"
In reply to: Dan Murphy: "[PATCH v3 6/9] leds: multicolor: Introduce a multicolor class definition"
Next in thread: Dan Murphy: "[PATCH v3 3/9] documention: leds: Add multicolor class documentation"
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