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spi: omap2-mcspi: Add gpio_request and init CS 

If GPIO chip select is specified, request the GPIO in the setup function
and release it in the cleanup function.

Signed-off-by: Michael Welling <mwelling@ieee.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Michael Welling 2015-05-08 13:31:01 -05:00 committed by Mark Brown
parent b28cb9414d
commit bc7f9bbc80
1 changed files with 10 additions and 0 deletions
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10
drivers/spi/spi-omap2-mcspi.c
View File

@ -35,6 +35,7 @@
#include <linux/gcd.h>
#include <linux/spi/spi.h>
#include <linux/gpio.h>
#include <linux/platform_data/spi-omap2-mcspi.h>
@ -1011,6 +1012,12 @@ static int omap2_mcspi_setup(struct spi_device *spi)
return ret;
}
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 = pm_runtime_get_sync(mcspi->dev);
if (ret < 0)
return ret;
@ -1050,6 +1057,9 @@ static void omap2_mcspi_cleanup(struct spi_device *spi)
mcspi_dma->dma_tx = NULL;
}
}
if (gpio_is_valid(spi->cs_gpio))
gpio_free(spi->cs_gpio);
}
static int omap2_mcspi_work_one(struct omap2_mcspi *mcspi,