When SPI wake up from OFF mode, CS is in wrong state: force it to unactive state
Signed-off-by: Gregory CLEMENT <gclemen...@gmail.com>
---
drivers/spi/omap2_mcspi.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
index b3a94ca..3083bd0 100644
--- a/drivers/spi/omap2_mcspi.c
+++ b/drivers/spi/omap2_mcspi.c
@@ -1137,7 +1137,15 @@ static u8 __initdata spi4_txdma_id[] = {
OMAP34XX_DMA_SPI4_TX0,
};
#endif
-
+/* When SPI wake up, CS is in wrong state: force it to unactive state*/
+static void omap2_mcspi_resume(struct spi_device *spi)
+{
+ omap2_mcspi_enable_clocks( spi_master_get_devdata(spi->master));
+/* We need to togle CS state for OMAP take this chang in account*/
+ omap2_mcspi_force_cs(spi, 1);
+ omap2_mcspi_force_cs(spi, 0);
+ omap2_mcspi_disable_clocks( spi_master_get_devdata(spi->master));
+}
static int __init omap2_mcspi_probe(struct platform_device *pdev)
{
struct spi_master *master;
@@ -1193,6 +1201,7 @@ static int __init omap2_mcspi_probe(struct
platform_device *pdev)
master->transfer = omap2_mcspi_transfer;
master->cleanup = omap2_mcspi_cleanup;
master->num_chipselect = num_chipselect;
+ master->resume = omap2_mcspi_resume;
dev_set_drvdata(&pdev->dev, master);
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