From cffd61a5c7755546154539dcd7f36590e91e002f Mon Sep 17 00:00:00 2001 From: =?utf8?q?Guido=20G=C3=BCnther?= Date: Sat, 4 Jan 2020 11:54:18 +0100 Subject: [PATCH] leds: lm3692x: Allow to configure over voltage protection MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Overvoltage protection is currently using the default of 29V. Make it configurable via DT. Signed-off-by: Guido Günther Acked-by: Pavel Machek Signed-off-by: Pavel Machek --- drivers/leds/leds-lm3692x.c | 34 ++++++++++++++++++++++++++++++---- 1 file 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"); -- 2.30.2