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Subject[PATCH 2/2] leds: lm3692x: Allow to set ovp and brigthness mode
Date
Overvoltage protection and brightness mode are currently hardcoded
as disabled in the driver. Make these configurable via DT.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
---
drivers/leds/leds-lm3692x.c | 43 +++++++++++++++++++++++++++++++------
1 file changed, 37 insertions(+), 6 deletions(-)

diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c
index 8b408102e138..2c084b333628 100644
--- a/drivers/leds/leds-lm3692x.c
+++ b/drivers/leds/leds-lm3692x.c
@@ -114,6 +114,7 @@ struct lm3692x_led {
struct regulator *regulator;
int led_enable;
int model_id;
+ u8 boost_ctrl, brightness_ctrl;
};

static const struct reg_default lm3692x_reg_defs[] = {
@@ -249,10 +250,7 @@ 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;

@@ -268,8 +266,7 @@ static int lm3692x_init(struct lm3692x_led *led)
if (ret)
goto out;

- ret = regmap_write(led->regmap, LM3692X_BRT_CTRL,
- LM3692X_BL_ADJ_POL | LM3692X_RAMP_EN);
+ ret = regmap_write(led->regmap, LM3692X_BRT_CTRL, led->brightness_ctrl);
if (ret)
goto out;

@@ -326,6 +323,8 @@ static int lm3692x_probe_dt(struct lm3692x_led *led)
{
struct fwnode_handle *child = NULL;
struct led_init_data init_data = {};
+ u32 ovp = 0;
+ bool exp_mode;
int ret;

led->enable_gpio = devm_gpiod_get_optional(&led->client->dev,
@@ -350,6 +349,38 @@ 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,overvoltage-volts", &ovp);
+ if (!ret) {
+ switch (ovp) {
+ case 0:
+ break;
+ case 22:
+ led->boost_ctrl |= LM3692X_OVP_21V;
+ break;
+ case 25:
+ led->boost_ctrl |= LM3692X_OVP_25V;
+ break;
+ case 29:
+ led->boost_ctrl |= LM3692X_OVP_29V;
+ break;
+ default:
+ dev_err(&led->client->dev, "Invalid OVP %d\n", ovp);
+ return -EINVAL;
+ }
+ }
+ dev_dbg(&led->client->dev, "OVP: %dV", ovp);
+
+ led->brightness_ctrl = LM3692X_BL_ADJ_POL | LM3692X_RAMP_EN;
+ exp_mode = device_property_read_bool(&led->client->dev,
+ "ti,brightness-mapping-exponential");
+ dev_dbg(&led->client->dev, "Exponential brightness: %d", exp_mode);
+ if (exp_mode)
+ led->brightness_ctrl |= LM3692X_MAP_MODE_EXP;
+
child = device_get_next_child_node(&led->client->dev, child);
if (!child) {
dev_err(&led->client->dev, "No LED Child node\n");
--
2.23.0
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