spi: pxa2xx_spi.c restore DRCMR on resume.
PATCH 1/1 spi: pxa2xx_spi.c restore DRCMR on resume.
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 <[email protected]>
--- drivers/spi/pxa2xx_spi.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-)
drivers/spi/pxa2xx_spi.c +7 -0
@@ -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);
Signature · 4 lines
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.