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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>
This commit is contained in:
Guido Günther 2020-01-04 11:54:18 +01:00 committed by Pavel
parent ebf59a4558
commit cffd61a5c7
1 changed files with 30 additions and 4 deletions
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34
drivers/leds/leds-lm3692x.c
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@ -114,6 +114,8 @@ struct lm3692x_led {
struct regulator *regulator; struct regulator *regulator;
int led_enable; int led_enable;
int model_id; int model_id;
u8 boost_ctrl;
}; };
static const struct reg_default lm3692x_reg_defs[] = { static const struct reg_default lm3692x_reg_defs[] = {
@ -249,10 +251,7 @@ static int lm3692x_init(struct lm3692x_led *led)
if (ret) if (ret)
goto out; goto out;
ret = regmap_write(led->regmap, LM3692X_BOOST_CTRL, ret = regmap_write(led->regmap, LM3692X_BOOST_CTRL, led->boost_ctrl);
LM3692X_BOOST_SW_1MHZ |
LM3692X_BOOST_SW_NO_SHIFT |
LM3692X_OCP_PROT_1_5A);
if (ret) if (ret)
goto out; goto out;
@ -326,6 +325,7 @@ static int lm3692x_probe_dt(struct lm3692x_led *led)
{ {
struct fwnode_handle *child = NULL; struct fwnode_handle *child = NULL;
struct led_init_data init_data = {}; struct led_init_data init_data = {};
u32 ovp;
int ret; int ret;
led->enable_gpio = devm_gpiod_get_optional(&led->client->dev, 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->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); child = device_get_next_child_node(&led->client->dev, child);
if (!child) { if (!child) {
dev_err(&led->client->dev, "No LED Child node\n"); dev_err(&led->client->dev, "No LED Child node\n");