From c0b913447b75538c3cf4b8016fd2e06509895020 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Wed, 4 Sep 2019 14:42:00 -0700 Subject: regulator: slg51000: use devm_gpiod_get_optional() in probe The CS GPIO line is clearly optional GPIO (and marked as such in the binding document) and we should handle it accordingly. The current code treats all errors as meaning that there is no GPIO defined, which is wrong, as it does not handle deferrals raised by the underlying code properly, nor does it recognize non-existing GPIO from any other initialization error. As far as I can see the only reason the driver, unlike all others, is using OF-specific devm_gpiod_get_from_of_node() so that it can assign a custom label to the selected GPIO line. Given that noone else needs that, it should not be doing that either. Let's switch to using more appropriate devm_gpiod_get_optional(). Signed-off-by: Dmitry Torokhov Link: https://lore.kernel.org/r/20190904214200.GA66118@dtor-ws Signed-off-by: Mark Brown --- drivers/regulator/slg51000-regulator.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) (limited to 'drivers/regulator/slg51000-regulator.c') diff --git a/drivers/regulator/slg51000-regulator.c b/drivers/regulator/slg51000-regulator.c index 4d859fef55e6..a0565daecace 100644 --- a/drivers/regulator/slg51000-regulator.c +++ b/drivers/regulator/slg51000-regulator.c @@ -447,19 +447,20 @@ static int slg51000_i2c_probe(struct i2c_client *client, { struct device *dev = &client->dev; struct slg51000 *chip; - struct gpio_desc *cs_gpiod = NULL; + struct gpio_desc *cs_gpiod; int error, ret; chip = devm_kzalloc(dev, sizeof(struct slg51000), GFP_KERNEL); if (!chip) return -ENOMEM; - cs_gpiod = devm_gpiod_get_from_of_node(dev, dev->of_node, - "dlg,cs-gpios", 0, - GPIOD_OUT_HIGH - | GPIOD_FLAGS_BIT_NONEXCLUSIVE, - "slg51000-cs"); - if (!IS_ERR(cs_gpiod)) { + cs_gpiod = devm_gpiod_get_optional(dev, "dlg,cs", + GPIOD_OUT_HIGH | + GPIOD_FLAGS_BIT_NONEXCLUSIVE); + if (IS_ERR(cs_gpiod)) + return PTR_ERR(cs_gpiod); + + if (cs_gpiod) { dev_info(dev, "Found chip selector property\n"); chip->cs_gpiod = cs_gpiod; } -- cgit v1.2.3