If DMA is enabled, any spi_sync call after suspend/resume would block forever,
because DRCMR is lost on suspend. This patch restores DRCMR to the same values
set by probe.
Signed-off-by: Daniel Ribeiro <drw...@gmail.com>
---
drivers/spi/pxa2xx_spi.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c
index c1688c7..79d7341 100644
--- a/drivers/spi/pxa2xx_spi.c
+++ b/drivers/spi/pxa2xx_spi.c
@@ -1700,6 +1700,13 @@ static int pxa2xx_spi_resume(struct platform_device
*pdev)
struct ssp_device *ssp = drv_data->ssp;
int status = 0;
+ if (drv_data->rx_channel != -1)
+ DRCMR(drv_data->ssp->drcmr_rx) =
+ DRCMR_MAPVLD | drv_data->rx_channel;
+ if (drv_data->tx_channel != -1)
+ DRCMR(drv_data->ssp->drcmr_tx) =
+ DRCMR_MAPVLD | drv_data->tx_channel;
+
/* Enable the SSP clock */
clk_enable(ssp->clk);
--
tg: (577c9c4..) spi/pxa2xx_spi-fix-dma-resume (depends on: master)
total: 0 errors, 0 warnings, 13 lines checked
pxa2xx_spi-fix-dma-resume.patch has no obvious style problems and is ready for
submission.
