From: Nicolin Chen <b42378@freescale.com>
Date: Fri, 19 Apr 2013 09:18:53 +0000 (+0800)
Subject: ENGR00273673-3 dma: imx-sdma: Add event pending trigger interface
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c811e00692d9c876ff1fadc46941103cd9bc2127;p=karo-tx-linux.git

ENGR00273673-3 dma: imx-sdma: Add event pending trigger interface

Add interface to allow other modules, like ASRC for example,
to trigger a dma request manually.

Signed-off-by: Nicolin Chen <b42378@freescale.com>
---

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 263001bf268a..e9af43c2b7c8 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1146,6 +1146,21 @@ static void sdma_issue_pending(struct dma_chan *chan)
 		sdma_enable_channel(sdma, sdmac->channel);
 }
 
+void sdma_set_event_pending(struct dma_chan *chan)
+{
+	struct sdma_channel *sdmac = to_sdma_chan(chan);
+	struct sdma_engine *sdma = sdmac->sdma;
+	u32 channel = sdmac->channel;
+	u32 reg;
+
+	reg = readl_relaxed(sdma->regs + SDMA_H_EVTPEND);
+	reg |= 1 << channel;
+	writel_relaxed(reg, sdma->regs + SDMA_H_EVTPEND);
+
+	return;
+}
+EXPORT_SYMBOL(sdma_set_event_pending);
+
 #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1	37
 
 static void sdma_add_scripts(struct sdma_engine *sdma,