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| author | Daniel Mack <zonque@gmail.com> | 2012-11-14 18:28:39 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-11-24 00:09:03 +0900 |
| commit | 385a4c2e286571ba824ee5312f506f198866c3b5 (patch) | |
| tree | cd50dafd2916208b81aee183794a6b05739512e0 /sound/soc/codecs/ak4104.c | |
| parent | ac5dbea0d483bc0f6281f55261fab1dee7e6ac96 (diff) | |
| download | linux-385a4c2e286571ba824ee5312f506f198866c3b5.tar.gz linux-385a4c2e286571ba824ee5312f506f198866c3b5.tar.bz2 linux-385a4c2e286571ba824ee5312f506f198866c3b5.zip | |
ASoC: ak4104: add reset line property to DT bindings
This device doesn't have a pdata definition for legacy boards, and
unless anyone need to control the reset GPIO, it's not worth adding one.
So this feature is only available to DT users for now.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/codecs/ak4104.c')
| -rw-r--r-- | sound/soc/codecs/ak4104.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sound/soc/codecs/ak4104.c b/sound/soc/codecs/ak4104.c index d4d485808894..eec086b226f7 100644 --- a/sound/soc/codecs/ak4104.c +++ b/sound/soc/codecs/ak4104.c @@ -15,6 +15,8 @@ #include <sound/soc.h> #include <sound/initval.h> #include <linux/spi/spi.h> +#include <linux/of_device.h> +#include <linux/of_gpio.h> #include <sound/asoundef.h> /* AK4104 registers addresses */ @@ -204,6 +206,7 @@ static const struct regmap_config ak4104_regmap = { static int ak4104_spi_probe(struct spi_device *spi) { + struct device_node *np = spi->dev.of_node; struct ak4104_private *ak4104; unsigned int val; int ret; @@ -225,6 +228,20 @@ static int ak4104_spi_probe(struct spi_device *spi) return ret; } + if (np) { + enum of_gpio_flags flags; + int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags); + + if (gpio_is_valid(gpio)) { + ret = devm_gpio_request_one(&spi->dev, gpio, + flags & OF_GPIO_ACTIVE_LOW ? + GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH, + "ak4104 reset"); + if (ret < 0) + return ret; + } + } + /* read the 'reserved' register - according to the datasheet, it * should contain 0x5b. Not a good way to verify the presence of * the device, but there is no hardware ID register. */ |