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| 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-lp55xx-common.c | |
| parent | 91e47d4083dd935f547ea55d0dffeeba4b210b4b (diff) | |
| download | lwn-54a7bef5aa8d5247a78d79460bac47849b91a28b.tar.gz lwn-54a7bef5aa8d5247a78d79460bac47849b91a28b.zip | |
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-lp55xx-common.c')
| -rw-r--r-- | drivers/leds/leds-lp55xx-common.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c index c1940964067a..77bb26906ea6 100644 --- a/drivers/leds/leds-lp55xx-common.c +++ b/drivers/leds/leds-lp55xx-common.c @@ -18,6 +18,7 @@ #include <linux/platform_data/leds-lp55xx.h> #include <linux/slab.h> #include <linux/gpio/consumer.h> +#include <dt-bindings/leds/leds-lp55xx.h> #include "leds-lp55xx-common.h" @@ -691,6 +692,14 @@ struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev, i++; } + if (of_property_read_u32(np, "ti,charge-pump-mode", &pdata->charge_pump_mode)) + pdata->charge_pump_mode = LP55XX_CP_AUTO; + + if (pdata->charge_pump_mode > LP55XX_CP_AUTO) { + dev_err(dev, "invalid charge pump mode %d\n", pdata->charge_pump_mode); + return ERR_PTR(-EINVAL); + } + of_property_read_string(np, "label", &pdata->label); of_property_read_u8(np, "clock-mode", &pdata->clock_mode); |