The patch titled
spi_bfin: wait for tx to complete on write paths
has been added to the -mm tree. Its filename is
spi_bfin-wait-for-tx-to-complete-on-write-paths.patch
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------------------------------------------------------
Subject: spi_bfin: wait for tx to complete on write paths
From: Sonic Zhang <[EMAIL PROTECTED]>
SPI writes should also not return until the last bit is sent.
Signed-off-by: Sonic Zhang <[EMAIL PROTECTED]>
Signed-off-by: Bryan Wu <[EMAIL PROTECTED]>
Signed-off-by: David Brownell <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/spi/spi_bfin5xx.c | 22 ++++++++++------------
1 file changed, 10 insertions(+), 12 deletions(-)
diff -puN
drivers/spi/spi_bfin5xx.c~spi_bfin-wait-for-tx-to-complete-on-write-paths
drivers/spi/spi_bfin5xx.c
--- a/drivers/spi/spi_bfin5xx.c~spi_bfin-wait-for-tx-to-complete-on-write-paths
+++ a/drivers/spi/spi_bfin5xx.c
@@ -278,16 +278,16 @@ static void u8_writer(struct driver_data
dev_dbg(&drv_data->pdev->dev,
"cr8-s is 0x%x\n", read_STAT(drv_data));
- /* poll for SPI completion before start */
- while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
- cpu_relax();
-
while (drv_data->tx < drv_data->tx_end) {
write_TDBR(drv_data, (*(u8 *) (drv_data->tx)));
while (read_STAT(drv_data) & BIT_STAT_TXS)
cpu_relax();
++drv_data->tx;
}
+
+ /* poll for SPI completion before return */
+ while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
+ cpu_relax();
}
static void u8_cs_chg_writer(struct driver_data *drv_data)
@@ -398,32 +398,30 @@ static void u16_writer(struct driver_dat
dev_dbg(&drv_data->pdev->dev,
"cr16 is 0x%x\n", read_STAT(drv_data));
- /* poll for SPI completion before start */
- while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
- cpu_relax();
-
while (drv_data->tx < drv_data->tx_end) {
write_TDBR(drv_data, (*(u16 *) (drv_data->tx)));
while ((read_STAT(drv_data) & BIT_STAT_TXS))
cpu_relax();
drv_data->tx += 2;
}
+
+ /* poll for SPI completion before return */
+ while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
+ cpu_relax();
}
static void u16_cs_chg_writer(struct driver_data *drv_data)
{
struct chip_data *chip = drv_data->cur_chip;
- /* poll for SPI completion before start */
- while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
- cpu_relax();
-
while (drv_data->tx < drv_data->tx_end) {
cs_active(drv_data, chip);
write_TDBR(drv_data, (*(u16 *) (drv_data->tx)));
while ((read_STAT(drv_data) & BIT_STAT_TXS))
cpu_relax();
+ while (!(read_STAT(drv_data) & BIT_STAT_SPIF))
+ cpu_relax();
cs_deactive(drv_data, chip);
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
origin.patch
spi_bfin-wait-for-tx-to-complete-on-write-paths.patch
-
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