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Subject[PATCH v2] spi: omap2-mcspi: Add gpio_request and init CS
Date
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>
---

v2: Adds gpio_free to cleanup function.

Broken out of patch series because the other patch in the series was applied.
commit b28cb9414db9f8e42ac18c9e360e4e99cda42489

This patch applies on top of that one.

drivers/spi/spi-omap2-mcspi.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index 3ac06ad..90cf7e7 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -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,
--
1.7.9.5


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