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spi: omap2-mcspi: Handle error on gpio_request 

If a valid GPIO is specified but cannot be requested by the driver, print a
message and error out of omap2_mcspi_setup.

Signed-off-by: Michael Welling <mwelling@ieee.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Michael Welling 2015-05-23 21:13:45 -05:00 committed by Mark Brown
parent a06b430fd8
commit c4339ac775
1 changed files with 6 additions and 3 deletions
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9
drivers/spi/spi-omap2-mcspi.c
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@ -1023,9 +1023,12 @@ static int omap2_mcspi_setup(struct spi_device *spi)
}
if (gpio_is_valid(spi->cs_gpio)) {
if (gpio_request(spi->cs_gpio, dev_name(&spi->dev)) == 0)
gpio_direction_output(spi->cs_gpio,
!(spi->mode & SPI_CS_HIGH));
ret = gpio_request(spi->cs_gpio, dev_name(&spi->dev));
if (ret) {
dev_err(&spi->dev, "failed to request gpio\n");
return ret;
}
gpio_direction_output(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH));
}
ret = pm_runtime_get_sync(mcspi->dev);