diff options
| author | Charles Keepax <ckeepax@opensource.wolfsonmicro.com> | 2015-10-15 12:37:12 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-10-16 17:48:39 +0300 |
| commit | ce938001c08c6580a8da38dc226fa605512afab6 (patch) | |
| tree | e20a0c631e76a048767463dbba290b629235d4aa /drivers/regulator | |
| parent | 33aa380006776850872914d83fe0dbeee42fc95d (diff) | |
| download | linux-ce938001c08c6580a8da38dc226fa605512afab6.tar.xz | |
regulator: arizona-ldo1: Fix handling of GPIO 0
The LDO1 driver is using the arizona_of_get_named_gpio helper function
which will return 0 if an error was encountered whilst parsing the GPIO,
as under the pdata scheme 0 was not being treated as a valid GPIO.
However, since the regulator framework was expanded to allow the use of
GPIO 0 this causes us to attempt to register GPIO 0 when we encountered
an error parsing the device tree.
This patch uses of_get_named_gpio directly and sets the
ena_gpio_initialized flag based on the return value.
Fixes: 1de3821ace82 ("regulator: Set ena_gpio_initialized in regulator drivers")
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/arizona-ldo1.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c index e3c5982a66a0..f7c88ff90c43 100644 --- a/drivers/regulator/arizona-ldo1.c +++ b/drivers/regulator/arizona-ldo1.c @@ -17,6 +17,7 @@ #include <linux/bitops.h> #include <linux/err.h> #include <linux/of.h> +#include <linux/of_gpio.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> @@ -189,13 +190,22 @@ static int arizona_ldo1_of_get_pdata(struct arizona *arizona, { struct arizona_pdata *pdata = &arizona->pdata; struct arizona_ldo1 *ldo1 = config->driver_data; + struct device_node *np = arizona->dev->of_node; struct device_node *init_node, *dcvdd_node; struct regulator_init_data *init_data; - pdata->ldoena = arizona_of_get_named_gpio(arizona, "wlf,ldoena", true); + pdata->ldoena = of_get_named_gpio(np, "wlf,ldoena", 0); + if (pdata->ldoena < 0) { + dev_warn(arizona->dev, + "LDOENA GPIO property missing/malformed: %d\n", + pdata->ldoena); + pdata->ldoena = 0; + } else { + config->ena_gpio_initialized = true; + } - init_node = of_get_child_by_name(arizona->dev->of_node, "ldo1"); - dcvdd_node = of_parse_phandle(arizona->dev->of_node, "DCVDD-supply", 0); + init_node = of_get_child_by_name(np, "ldo1"); + dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0); if (init_node) { config->of_node = init_node; @@ -274,8 +284,6 @@ static int arizona_ldo1_probe(struct platform_device *pdev) ret = arizona_ldo1_of_get_pdata(arizona, &config, desc); if (ret < 0) return ret; - - config.ena_gpio_initialized = true; } } |