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>
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 @@
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 @@
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,