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Subject[PATCH V2 2/3] spi: img-spfi: Reset controller after each message
Date
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>
---
New for v2.
---
drivers/spi/spi-img-spfi.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c
index a3cf5be..dedb7d8 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");
--
2.2.0.rc0.207.ga3a616c


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