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pxa2xx_spi: 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 <drwyrm@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Daniel Ribeiro 2009-04-21 12:24:43 -07:00 committed by Linus Torvalds
parent aa0b8f3687
commit 148da33120
1 changed files with 7 additions and 0 deletions
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7
drivers/spi/pxa2xx_spi.c
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@ -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);