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| author | Daniel Ribeiro <drwyrm@gmail.com> | 2009-04-21 12:24:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-21 13:41:49 -0700 |
| commit | 148da331200a0df8195e10eb8a38fd77bd7003af (patch) | |
| tree | 73c24340fe39aa12fa9a31997ace8ce95448bc68 | |
| parent | aa0b8f3687f06ac0e5a2b24547fdf431e923c475 (diff) | |
| download | linux-stable-148da331200a0df8195e10eb8a38fd77bd7003af.tar.gz linux-stable-148da331200a0df8195e10eb8a38fd77bd7003af.tar.bz2 linux-stable-148da331200a0df8195e10eb8a38fd77bd7003af.zip | |
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>
| -rw-r--r-- | 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 c76feea5fe25..1a00b415bcc4 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); |