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| author |   Dan Murphy <dmurphy@ti.com> | 2019-08-20 14:53:07 -0500 |
|---|---|---|
| committer |   Jacek Anaszewski <jacek.anaszewski@gmail.com> | 2019-08-26 20:03:58 +0200 |
| commit | 517ea49a7b23c6730ed1a23f152fcd32173eb300 (patch) | |
| tree | 43965df8ccb9d0ec6b1789e766d063af494acebd /drivers/leds | |
| parent | dt: lm3532: Add property for full scale current. (diff) | |
| download | linux-dev-517ea49a7b23c6730ed1a23f152fcd32173eb300.tar.xz linux-dev-517ea49a7b23c6730ed1a23f152fcd32173eb300.zip | |
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: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/leds-lm3532.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/leds/leds-lm3532.c b/drivers/leds/leds-lm3532.c index 5e33ae4561f2..ba352d76a8fb 100644 --- a/drivers/leds/leds-lm3532.c +++ b/drivers/leds/leds-lm3532.c @@ -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); |