The flush() is used to drain all the left data in rx fifo, currently
is is always called together with disabling hw. But from spec, disabling
hw will also reset all the fifo, so flush() is not needed.
Signed-off-by: Alek Du <alek...@intel.com>
Signed-off-by: Feng Tang <feng.t...@intel.com>
---
drivers/spi/dw_spi.c | 15 +--------------
1 files changed, 1 insertions(+), 14 deletions(-)
diff --git a/drivers/spi/dw_spi.c b/drivers/spi/dw_spi.c
index c83f6b1..35ac2b9 100644
--- a/drivers/spi/dw_spi.c
+++ b/drivers/spi/dw_spi.c
@@ -173,17 +173,6 @@ static void wait_till_not_busy(struct dw_spi *dws)
"DW SPI: Status keeps busy for 5000us after a read/write!\n");
}
-static void flush(struct dw_spi *dws)
-{
- while (dw_readw(dws, sr) & SR_RF_NOT_EMPT) {
- dw_readw(dws, dr);
- cpu_relax();
- }
-
- wait_till_not_busy(dws);
-}
-
-
static int dw_writer(struct dw_spi *dws)
{
u16 txw = 0;
@@ -297,8 +286,7 @@ static void giveback(struct dw_spi *dws)
static void int_error_stop(struct dw_spi *dws, const char *msg)
{
- /* Stop and reset hw */
- flush(dws);
+ /* Stop the hw */
spi_enable_chip(dws, 0);
dev_err(&dws->master->dev, "%s\n", msg);
@@ -800,7 +788,6 @@ static void spi_hw_init(struct dw_spi *dws)
spi_enable_chip(dws, 0);
spi_mask_intr(dws, 0xff);
spi_enable_chip(dws, 1);
- flush(dws);
/*
* Try to detect the FIFO depth if not set by interface driver,
--
1.7.0.4
------------------------------------------------------------------------------
Colocation vs. Managed Hosting
A question and answer guide to determining the best fit
for your organization - today and in the future.
http://p.sf.net/sfu/internap-sfd2d
_______________________________________________
spi-devel-general mailing list
spi-devel-general@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/spi-devel-general
