Hi,
I am converting a driver from ssp.c API to pxa2xx_spi. But
when using PIO mode i am getting bogus rx data.
I did some tests, and it looks like CS is being deasserted
before the IO is done.
The following patch solved the issue for me.
Please CC me on replies, im not subscribed to spi-devel.
--
Daniel Ribeiro
-- patch --
pxa2xx_spi: wait_rx_stall before deasserting CS on PIO mode
Signed-off-by: Daniel Ribeiro <[EMAIL PROTECTED]>
diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c
index 0c452c4..4a9c34e 100644
--- a/drivers/spi/pxa2xx_spi.c
+++ b/drivers/spi/pxa2xx_spi.c
@@ -593,6 +593,10 @@ static void int_transfer_complete(struct
driver_data *drv_d {
void __iomem *reg = drv_data->ioaddr;
+ if (wait_ssp_rx_stall(drv_data->ioaddr) == 0)
+ dev_err(&drv_data->pdev->dev,
+ "interrupt_transfer: ssp rx stall failed\n");
+
/* Stop SSP */
write_SSSR(drv_data->clear_sr, reg);
write_SSCR1(read_SSCR1(reg) & ~drv_data->int_cr1, reg);
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