From: Daniel Ribeiro <drwyrm@gmail.com>
Date: Tue, 21 Apr 2009 19:24:43 +0000 (-0700)
Subject: pxa2xx_spi: restore DRCMR on resume
X-Git-Tag: v2.6.30-rc3~21
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=148da331200a0df8195e10eb8a38fd77bd7003af;p=karo-tx-linux.git

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>
---

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);