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authorAndrew Bresticker <abrestic@chromium.org>2015-04-08 10:03:15 -0700
committerMark Brown <broonie@kernel.org>2015-04-08 21:04:28 +0100
commitba33d8ac0c93fdfbdbc825ef690caab5d57e22c2 (patch)
tree836b32cd51fa1516058d1c7981402cab6f099989 /drivers/spi
parent824ab37df006ea2d06e4c4817344c0e8c056b744 (diff)
downloadlinux-ba33d8ac0c93fdfbdbc825ef690caab5d57e22c2.tar.bz2
spi: img-spfi: Reset controller after each message
Imagination has recommended that the SPFI controller be reset after each message, regardless of success or failure. Do this in an unprepare_message() callback. Signed-off-by: Andrew Bresticker <abrestic@chromium.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-img-spfi.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c
index 3fd7b07c3eef..c37f6e50096e 100644
--- a/drivers/spi/spi-img-spfi.c
+++ b/drivers/spi/spi-img-spfi.c
@@ -414,8 +414,6 @@ static void img_spfi_handle_err(struct spi_master *master,
dmaengine_terminate_all(spfi->rx_ch);
}
spin_unlock_irqrestore(&spfi->lock, flags);
-
- spfi_reset(spfi);
}
static int img_spfi_prepare(struct spi_master *master, struct spi_message *msg)
@@ -437,6 +435,16 @@ static int img_spfi_prepare(struct spi_master *master, struct spi_message *msg)
return 0;
}
+static int img_spfi_unprepare(struct spi_master *master,
+ struct spi_message *msg)
+{
+ struct img_spfi *spfi = spi_master_get_devdata(master);
+
+ spfi_reset(spfi);
+
+ return 0;
+}
+
static void img_spfi_config(struct spi_master *master, struct spi_device *spi,
struct spi_transfer *xfer)
{
@@ -610,6 +618,7 @@ static int img_spfi_probe(struct platform_device *pdev)
master->set_cs = img_spfi_set_cs;
master->transfer_one = img_spfi_transfer_one;
master->prepare_message = img_spfi_prepare;
+ master->unprepare_message = img_spfi_unprepare;
master->handle_err = img_spfi_handle_err;
spfi->tx_ch = dma_request_slave_channel(spfi->dev, "tx");