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dmaengine: fsl-edma: add i.mx7ulp edma2 version support

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Add edma2 for i.mx7ulp by version v3, since v2 has already
been used by mcf-edma.
The big changes based on v1 are belows:
1. only one dmamux.
2. another clock dma_clk except dmamux clk.
3. 16 independent interrupts instead of only one interrupt for
all channels.

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Link: https://lore.kernel.org/r/1563952834-7731-1-git-send-email-yibin.gong@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Robin Gong
2019-07-24 15:20:34 +08:00
committed by Vinod Koul
parent 719e25dba4
commit 232a7f18cf
3 changed files with 86 additions and 1 deletions
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18
drivers/dma/fsl-edma-common.c
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@@ -90,6 +90,19 @@ static void mux_configure8(struct fsl_edma_chan *fsl_chan, void __iomem *addr,
iowrite8(val8, addr + off);
}
void mux_configure32(struct fsl_edma_chan *fsl_chan, void __iomem *addr,
u32 off, u32 slot, bool enable)
{
u32 val;
if (enable)
val = EDMAMUX_CHCFG_ENBL << 24 | slot;
else
val = EDMAMUX_CHCFG_DIS;
iowrite32(val, addr + off * 4);
}
void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan,
unsigned int slot, bool enable)
{
@@ -103,7 +116,10 @@ void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan,
muxaddr = fsl_chan->edma->muxbase[ch / chans_per_mux];
slot = EDMAMUX_CHCFG_SOURCE(slot);
mux_configure8(fsl_chan, muxaddr, ch_off, slot, enable);
if (fsl_chan->edma->drvdata->version == v3)
mux_configure32(fsl_chan, muxaddr, ch_off, slot, enable);
else
mux_configure8(fsl_chan, muxaddr, ch_off, slot, enable);
}
EXPORT_SYMBOL_GPL(fsl_edma_chan_mux);