diff options
| author | Maarten Zanders <maarten.zanders@mind.be> | 2023-04-21 09:53:05 +0200 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2023-05-25 12:16:05 +0100 |
| commit | 54a7bef5aa8d5247a78d79460bac47849b91a28b (patch) | |
| tree | 1e92eed8d6419643d6a19b103ee6d77bd32ceadf /drivers/leds/leds-lp8501.c | |
| parent | 91e47d4083dd935f547ea55d0dffeeba4b210b4b (diff) | |
leds: lp55xx: Configure internal charge pump
The LP55xx range of devices have an internal charge pump which
can (automatically) increase the output voltage towards the
LED's, boosting the output voltage to 4.5V.
Implement this option from the devicetree. When the setting
is not present it will operate in automatic mode as before.
Tested on LP55231. Datasheet analysis shows that LP5521, LP5523
and LP8501 are identical in topology and are modified in the
same way.
Signed-off-by: Maarten Zanders <maarten.zanders@mind.be>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230421075305.37597-3-maarten.zanders@mind.be
Diffstat (limited to 'drivers/leds/leds-lp8501.c')
| -rw-r--r-- | drivers/leds/leds-lp8501.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/leds/leds-lp8501.c b/drivers/leds/leds-lp8501.c index 165d6423a928..878d81dace8a 100644 --- a/drivers/leds/leds-lp8501.c +++ b/drivers/leds/leds-lp8501.c @@ -53,10 +53,10 @@ #define LP8501_PWM_PSAVE BIT(7) #define LP8501_AUTO_INC BIT(6) #define LP8501_PWR_SAVE BIT(5) -#define LP8501_CP_AUTO 0x18 +#define LP8501_CP_MODE_MASK 0x18 +#define LP8501_CP_MODE_SHIFT 3 #define LP8501_INT_CLK BIT(0) -#define LP8501_DEFAULT_CFG \ - (LP8501_PWM_PSAVE | LP8501_AUTO_INC | LP8501_PWR_SAVE | LP8501_CP_AUTO) +#define LP8501_DEFAULT_CFG (LP8501_PWM_PSAVE | LP8501_AUTO_INC | LP8501_PWR_SAVE) #define LP8501_REG_RESET 0x3D #define LP8501_RESET 0xFF @@ -102,6 +102,8 @@ static int lp8501_post_init_device(struct lp55xx_chip *chip) if (chip->pdata->clock_mode != LP55XX_CLOCK_EXT) val |= LP8501_INT_CLK; + val |= (chip->pdata->charge_pump_mode << LP8501_CP_MODE_SHIFT) & LP8501_CP_MODE_MASK; + ret = lp55xx_write(chip, LP8501_REG_CONFIG, val); if (ret) return ret; |