Commit 517ea49a authored by Dan Murphy's avatar Dan Murphy Committed by Jacek Anaszewski
Browse files

leds: lm3532: Add full scale current configuration 



Allow the full scale current to be configured at init.
Valid rangles are 5mA->29.8mA.

Signed-off-by: default avatarDan Murphy <dmurphy@ti.com>
Signed-off-by: default avatarJacek Anaszewski <jacek.anaszewski@gmail.com>
parent aa01d255

drivers/leds/leds-lm3532.c

+25 −0
Original line number Diff line number Diff line
@@ -89,6 +89,10 @@ 
#define LM3532_NUM_AVG_VALS	8

#define LM3532_NUM_IMP_VALS	32



#define LM3532_FS_CURR_MIN	5000

#define LM3532_FS_CURR_MAX	29800

#define LM3532_FS_CURR_STEP	800



/*

 * struct lm3532_als_data

 * @config - value of ALS configuration register
@@ -121,6 +125,7 @@ struct lm3532_als_data { 
 * @mode - Mode of the LED string

 * @ctrl_brt_pointer - Zone target register that controls the sink

 * @num_leds - Number of LED strings are supported in this array

 * @full_scale_current - The full-scale current setting for the current sink.

 * @led_strings - The LED strings supported in this array

 * @label - LED label

 */
@@ -132,6 +137,7 @@ struct lm3532_led { 
	int mode;

	int ctrl_brt_pointer;

	int num_leds;

	int full_scale_current;

	u32 led_strings[LM3532_MAX_CONTROL_BANKS];

	char label[LED_MAX_NAME_SIZE];

};
@@ -363,6 +369,8 @@ static int lm3532_init_registers(struct lm3532_led *led) 
	unsigned int output_cfg_mask = 0;

	unsigned int brightness_config_reg;

	unsigned int brightness_config_val;

	int fs_current_reg;

	int fs_current_val;

	int ret, i;



	if (drvdata->enable_gpio)
@@ -385,6 +393,17 @@ static int lm3532_init_registers(struct lm3532_led *led) 
	if (ret)

		return ret;



	if (led->full_scale_current) {

		fs_current_reg = LM3532_REG_CTRL_A_FS_CURR + led->control_bank * 2;

		fs_current_val = (led->full_scale_current - LM3532_FS_CURR_MIN) /

				 LM3532_FS_CURR_STEP;



		ret = regmap_write(drvdata->regmap, fs_current_reg,

				   fs_current_val);

		if (ret)

			return ret;

	}



	for (i = 0; i < led->num_leds; i++) {

		output_cfg_shift = led->led_strings[i] * 2;

		output_cfg_val |= (led->control_bank << output_cfg_shift);
@@ -560,6 +579,12 @@ static int lm3532_parse_node(struct lm3532_data *priv) 
			goto child_out;

		}



		ret = fwnode_property_read_u32(child, "led-max-microamp",

					       &led->full_scale_current);



		if (led->full_scale_current > LM3532_FS_CURR_MAX)

			led->full_scale_current = LM3532_FS_CURR_MAX;



		if (led->mode == LM3532_BL_MODE_ALS) {

			led->mode = LM3532_ALS_CTRL;

			ret = lm3532_parse_als(priv);