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authorGuido Günther <agx@sigxcpu.org>2020-01-04 11:54:18 +0100
committerPavel <pavel@ucw.cz>2020-01-06 00:41:06 +0100
commitcffd61a5c7755546154539dcd7f36590e91e002f (patch)
tree0d6121518b7f755b2985bd29ee9dd6b01462562a /drivers
parentdt: bindings: lm3692x: Add ti,ovp-microvolt property (diff)
downloadlinux-dev-cffd61a5c7755546154539dcd7f36590e91e002f.tar.xz
linux-dev-cffd61a5c7755546154539dcd7f36590e91e002f.zip
leds: lm3692x: Allow to configure over voltage protection
Overvoltage protection is currently using the default of 29V. Make it configurable via DT. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/leds/leds-lm3692x.c34
1 files changed, 30 insertions, 4 deletions
diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c
index 8b408102e138..28973cc5a6cc 100644
--- a/drivers/leds/leds-lm3692x.c
+++ b/drivers/leds/leds-lm3692x.c
@@ -114,6 +114,8 @@ struct lm3692x_led {
struct regulator *regulator;
int led_enable;
int model_id;
+
+ u8 boost_ctrl;
};
static const struct reg_default lm3692x_reg_defs[] = {
@@ -249,10 +251,7 @@ static int lm3692x_init(struct lm3692x_led *led)
if (ret)
goto out;
- ret = regmap_write(led->regmap, LM3692X_BOOST_CTRL,
- LM3692X_BOOST_SW_1MHZ |
- LM3692X_BOOST_SW_NO_SHIFT |
- LM3692X_OCP_PROT_1_5A);
+ ret = regmap_write(led->regmap, LM3692X_BOOST_CTRL, led->boost_ctrl);
if (ret)
goto out;
@@ -326,6 +325,7 @@ static int lm3692x_probe_dt(struct lm3692x_led *led)
{
struct fwnode_handle *child = NULL;
struct led_init_data init_data = {};
+ u32 ovp;
int ret;
led->enable_gpio = devm_gpiod_get_optional(&led->client->dev,
@@ -350,6 +350,32 @@ static int lm3692x_probe_dt(struct lm3692x_led *led)
led->regulator = NULL;
}
+ led->boost_ctrl = LM3692X_BOOST_SW_1MHZ |
+ LM3692X_BOOST_SW_NO_SHIFT |
+ LM3692X_OCP_PROT_1_5A;
+ ret = device_property_read_u32(&led->client->dev,
+ "ti,ovp-microvolt", &ovp);
+ if (ret) {
+ led->boost_ctrl |= LM3692X_OVP_29V;
+ } else {
+ switch (ovp) {
+ case 17000000:
+ break;
+ case 21000000:
+ led->boost_ctrl |= LM3692X_OVP_21V;
+ break;
+ case 25000000:
+ led->boost_ctrl |= LM3692X_OVP_25V;
+ break;
+ case 29000000:
+ led->boost_ctrl |= LM3692X_OVP_29V;
+ break;
+ default:
+ dev_err(&led->client->dev, "Invalid OVP %d\n", ovp);
+ return -EINVAL;
+ }
+ }
+
child = device_get_next_child_node(&led->client->dev, child);
if (!child) {
dev_err(&led->client->dev, "No LED Child node\n");