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>

diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c
index 8b40810..28973cc 100644 (file)
--- 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");