From 62f7f3eca4c30064ab37b42d97cef4292d75fdd0 Mon Sep 17 00:00:00 2001 From: Sven Van Asbroeck Date: Tue, 19 Nov 2019 10:46:08 -0500 Subject: tps6105x: add optional devicetree support This driver currently requires platform data to specify the operational mode and regulator init data (in case of regulator mode). Optionally specify the operational mode by looking at the name of the devicetree child node. Example: put chip in regulator mode: i2c0 { tps61052@33 { compatible = "ti,tps61052"; reg = <0x33>; regulator { regulator-min-microvolt = <5000000>; regulator-max-microvolt = <5000000>; regulator-always-on; }; }; }; Tree: linux-next Signed-off-by: Sven Van Asbroeck Link: https://lore.kernel.org/r/20191119154611.29625-2-TheSven73@gmail.com Signed-off-by: Mark Brown --- drivers/mfd/tps6105x.c | 34 +++++++++++++++++++++++++++++++--- 1 file changed, 31 insertions(+), 3 deletions(-) (limited to 'drivers/mfd') diff --git a/drivers/mfd/tps6105x.c b/drivers/mfd/tps6105x.c index 6ac3607a79c2..c906324d293e 100644 --- a/drivers/mfd/tps6105x.c +++ b/drivers/mfd/tps6105x.c @@ -91,6 +91,32 @@ static int tps6105x_add_device(struct tps6105x *tps6105x, PLATFORM_DEVID_AUTO, cell, 1, NULL, 0, NULL); } +static struct tps6105x_platform_data *tps6105x_parse_dt(struct device *dev) +{ + struct device_node *np = dev->of_node; + struct tps6105x_platform_data *pdata; + struct device_node *child; + + if (!np) + return ERR_PTR(-EINVAL); + if (of_get_available_child_count(np) > 1) { + dev_err(dev, "cannot support multiple operational modes"); + return ERR_PTR(-EINVAL); + } + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + pdata->mode = TPS6105X_MODE_SHUTDOWN; + for_each_available_child_of_node(np, child) { + if (child->name && !of_node_cmp(child->name, "regulator")) + pdata->mode = TPS6105X_MODE_VOLTAGE; + else if (child->name && !of_node_cmp(child->name, "led")) + pdata->mode = TPS6105X_MODE_TORCH; + } + + return pdata; +} + static int tps6105x_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -99,9 +125,11 @@ static int tps6105x_probe(struct i2c_client *client, int ret; pdata = dev_get_platdata(&client->dev); - if (!pdata) { - dev_err(&client->dev, "missing platform data\n"); - return -ENODEV; + if (!pdata) + pdata = tps6105x_parse_dt(&client->dev); + if (IS_ERR(pdata)) { + dev_err(&client->dev, "No platform data or DT found"); + return PTR_ERR(pdata); } tps6105x = devm_kmalloc(&client->dev, sizeof(*tps6105x), GFP_KERNEL); -- cgit