diff options
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/leds-lm3530.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c index ce79523a4d10..a889311eead1 100644 --- a/drivers/leds/leds-lm3530.c +++ b/drivers/leds/leds-lm3530.c @@ -157,6 +157,7 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) u32 als_vmin, als_vmax, als_vstep; struct lm3530_platform_data *pltfm = drvdata->pdata; struct i2c_client *client = drvdata->client; + struct lm3530_pwm_data *pwm = &pltfm->pwm_data; gen_config = (pltfm->brt_ramp_law << LM3530_RAMP_LAW_SHIFT) | ((pltfm->max_current & 7) << LM3530_MAX_CURR_SHIFT); @@ -240,6 +241,15 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) } for (i = 0; i < LM3530_REG_MAX; i++) { + /* do not update brightness register when pwm mode */ + if (lm3530_reg[i] == LM3530_BRT_CTRL_REG && + drvdata->mode == LM3530_BL_MODE_PWM) { + if (pwm->pwm_set_intensity) + pwm->pwm_set_intensity(reg_val[i], + drvdata->led_dev.max_brightness); + continue; + } + ret = i2c_smbus_write_byte_data(client, lm3530_reg[i], reg_val[i]); if (ret) @@ -255,6 +265,9 @@ static void lm3530_brightness_set(struct led_classdev *led_cdev, int err; struct lm3530_data *drvdata = container_of(led_cdev, struct lm3530_data, led_dev); + struct lm3530_platform_data *pdata = drvdata->pdata; + struct lm3530_pwm_data *pwm = &pdata->pwm_data; + u8 max_brightness = led_cdev->max_brightness; switch (drvdata->mode) { case LM3530_BL_MODE_MANUAL: @@ -288,6 +301,8 @@ static void lm3530_brightness_set(struct led_classdev *led_cdev, case LM3530_BL_MODE_ALS: break; case LM3530_BL_MODE_PWM: + if (pwm->pwm_set_intensity) + pwm->pwm_set_intensity(brt_val, max_brightness); break; default: break; @@ -318,23 +333,24 @@ static ssize_t lm3530_mode_set(struct device *dev, struct device_attribute { struct led_classdev *led_cdev = dev_get_drvdata(dev); struct lm3530_data *drvdata; + struct lm3530_pwm_data *pwm; + u8 max_brightness; int mode, err; drvdata = container_of(led_cdev, struct lm3530_data, led_dev); + pwm = &drvdata->pdata->pwm_data; + max_brightness = led_cdev->max_brightness; mode = lm3530_get_mode_from_str(buf); if (mode < 0) { dev_err(dev, "Invalid mode\n"); return -EINVAL; } - if (mode == LM3530_BL_MODE_MANUAL) - drvdata->mode = LM3530_BL_MODE_MANUAL; - else if (mode == LM3530_BL_MODE_ALS) - drvdata->mode = LM3530_BL_MODE_ALS; - else if (mode == LM3530_BL_MODE_PWM) { - dev_err(dev, "PWM mode not supported\n"); - return -EINVAL; - } + drvdata->mode = mode; + + /* set pwm to low if unnecessary */ + if (mode != LM3530_BL_MODE_PWM && pwm->pwm_set_intensity) + pwm->pwm_set_intensity(0, max_brightness); err = lm3530_init_registers(drvdata); if (err) { |