Jacek
On 9/25/19 5:00 PM, Jacek Anaszewski wrote:
Dan,
On 9/25/19 7:46 PM, Dan Murphy wrote:
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)
Why do we need this function? brightness op will not suffice?
I looked at this before sending it in. This API adds the chan_num to
write to.
The brightness_fn does not it takes it from the led structure.
+{
+ 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]);
Now we will have three separate calls for each color component
(and possibly sleeping on mutex on contention).
Probably LED mc class use case will need a bit different design.
Also, instead of grouped_channels we could possibly have
led_mc_get_color_id(&led->mc_dev, i)
color_id and grouped_channels are not a 1:1 mapping
which would map entry position index to color_id.
I will stop reviewing here and will continue after taking
deeper look at this lp55xx design.
Dan
