regulator: gpio: properly check return value of of_get_named_gpio

The function of_get_named_gpio() could return -ENOENT, -EPROBE_DEFER
-EINVAL and so on. Currently, for the optional property "enable-gpio",
we only check -EPROBE_DEFER, this is not enough since there may be
misconfigured "enable-gpio" in the DTB, of_get_named_gpio() will return
-EINVAL in this case, we should return immediately here. And for the
optional property "gpios", we didn't check the return value, the driver
will continue to the point where gpio_request_array() is called, it
doesn't make sense to continue if we got -EPROBE_DEFER or -EINVAL here.

This patch tries to address these two issues by properly checking the
return value of of_get_named_gpio.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

path: root/sound/soc/bcm/Kconfig

config SND_BCM2835_SOC_I2S
	tristate "SoC Audio support for the Broadcom BCM2835 I2S module"
	depends on ARCH_BCM2835 || COMPILE_TEST
	select SND_SOC_GENERIC_DMAENGINE_PCM
	select REGMAP_MMIO
	help
	  Say Y or M if you want to add support for codecs attached to
	  the BCM2835 I2S interface. You will also need
	  to select the audio interfaces to support below.

config SND_SOC_CYGNUS
	tristate "SoC platform audio for Broadcom Cygnus chips"
	depends on ARCH_BCM_CYGNUS || COMPILE_TEST
	depends on HAS_DMA
	help
	  Say Y if you want to add support for ASoC audio on Broadcom
	  Cygnus chips (bcm958300, bcm958305, bcm911360)

	  If you don't know what to do here, say N.