dmaengine: shdma: add chcr_ie_bit

IE bit position on CHCR register is not same in all DMAC.
This patch adds new "chcr_ie_bit" to decide it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

3 files changed, 11 insertions, 2 deletions

diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index 40900c1cee9a..9412de3ef899 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -181,17 +181,19 @@ static void dmae_set_reg(struct sh_dmae_chan *sh_chan, struct sh_dmae_regs *hw)
 
 static void dmae_start(struct sh_dmae_chan *sh_chan)
 {
+        struct sh_dmae_device *shdev = to_sh_dev(sh_chan);
         u32 chcr = chcr_read(sh_chan);
 
-        chcr |= CHCR_DE | CHCR_IE;
+        chcr |= CHCR_DE | shdev->chcr_ie_bit;
         chcr_write(sh_chan, chcr & ~CHCR_TE);
 }
 
 static void dmae_halt(struct sh_dmae_chan *sh_chan)
 {
+        struct sh_dmae_device *shdev = to_sh_dev(sh_chan);
         u32 chcr = chcr_read(sh_chan);
 
-        chcr &= ~(CHCR_DE | CHCR_TE | CHCR_IE);
+        chcr &= ~(CHCR_DE | CHCR_TE | shdev->chcr_ie_bit);
         chcr_write(sh_chan, chcr);
 }
 
@@ -1157,6 +1159,11 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
         else
                 shdev->chcr_offset = CHCR;
 
+        if (pdata->chcr_ie_bit)
+                shdev->chcr_ie_bit = pdata->chcr_ie_bit;
+        else
+                shdev->chcr_ie_bit = CHCR_IE;
+
         platform_set_drvdata(pdev, shdev);
 
         pm_runtime_enable(&pdev->dev);
diff --git a/drivers/dma/shdma.h b/drivers/dma/shdma.h
index 6f064cad6c0f..dc56576f9fdb 100644
--- a/drivers/dma/shdma.h
+++ b/drivers/dma/shdma.h
@@ -48,6 +48,7 @@ struct sh_dmae_device {
         u32 __iomem *chan_reg;
         u16 __iomem *dmars;
         unsigned int chcr_offset;
+        u32 chcr_ie_bit;
 };
 
 #define to_sh_chan(chan) container_of(chan, struct sh_dmae_chan, common)
diff --git a/include/linux/sh_dma.h b/include/linux/sh_dma.h
index 41fe4c2d6481..96803aa7b6bd 100644
--- a/include/linux/sh_dma.h
+++ b/include/linux/sh_dma.h
@@ -63,6 +63,7 @@ struct sh_dmae_pdata {
         int ts_shift_num;
         u16 dmaor_init;
         unsigned int chcr_offset;
+        u32 chcr_ie_bit;
 };
 
 /* DMA register */