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From 83d2cb1c64c5a34f23b34fcee715a68be230c232 Mon Sep 17 00:00:00 2001
From: Peng Ma <peng.ma@nxp.com>
Date: Thu, 12 Dec 2019 03:38:10 +0000
Subject: [PATCH] dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A
platform
Our platforms(such as LS1021A, LS1012A, LS1043A, LS1046A, LS1028A) with
below registers(CHCFG0 - CHCFG15) of eDMA as follows:
*-----------------------------------------------------------*
| Offset | OTHERS | LS1028A |
|--------------|--------------------|-----------------------|
| 0x0 | CHCFG0 | CHCFG3 |
|--------------|--------------------|-----------------------|
| 0x1 | CHCFG1 | CHCFG2 |
|--------------|--------------------|-----------------------|
| 0x2 | CHCFG2 | CHCFG1 |
|--------------|--------------------|-----------------------|
| 0x3 | CHCFG3 | CHCFG0 |
|--------------|--------------------|-----------------------|
| ... | ...... | ...... |
|--------------|--------------------|-----------------------|
| 0xC | CHCFG12 | CHCFG15 |
|--------------|--------------------|-----------------------|
| 0xD | CHCFG13 | CHCFG14 |
|--------------|--------------------|-----------------------|
| 0xE | CHCFG14 | CHCFG13 |
|--------------|--------------------|-----------------------|
| 0xF | CHCFG15 | CHCFG12 |
*-----------------------------------------------------------*
This patch is to improve edma driver to fit LS1028A platform.
Signed-off-by: Peng Ma <peng.ma@nxp.com>
Reviewed-by: Robin Gong <yibin.gong@nxp.com>
Link: https://lore.kernel.org/r/20191212033714.4090-1-peng.ma@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
drivers/dma/fsl-edma-common.c | 5 +++++
drivers/dma/fsl-edma-common.h | 1 +
drivers/dma/fsl-edma.c | 8 ++++++++
3 files changed, 14 insertions(+)
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -109,10 +109,15 @@ void fsl_edma_chan_mux(struct fsl_edma_c
u32 ch = fsl_chan->vchan.chan.chan_id;
void __iomem *muxaddr;
unsigned int chans_per_mux, ch_off;
+ int endian_diff[4] = {3, 1, -1, -3};
u32 dmamux_nr = fsl_chan->edma->drvdata->dmamuxs;
chans_per_mux = fsl_chan->edma->n_chans / dmamux_nr;
ch_off = fsl_chan->vchan.chan.chan_id % chans_per_mux;
+
+ if (fsl_chan->edma->drvdata->mux_swap)
+ ch_off += endian_diff[ch_off % 4];
+
muxaddr = fsl_chan->edma->muxbase[ch / chans_per_mux];
slot = EDMAMUX_CHCFG_SOURCE(slot);
--- a/drivers/dma/fsl-edma-common.h
+++ b/drivers/dma/fsl-edma-common.h
@@ -148,6 +148,7 @@ struct fsl_edma_drvdata {
enum edma_version version;
u32 dmamuxs;
bool has_dmaclk;
+ bool mux_swap;
int (*setup_irq)(struct platform_device *pdev,
struct fsl_edma_engine *fsl_edma);
};
--- a/drivers/dma/fsl-edma.c
+++ b/drivers/dma/fsl-edma.c
@@ -234,6 +234,13 @@ static struct fsl_edma_drvdata vf610_dat
.setup_irq = fsl_edma_irq_init,
};
+static struct fsl_edma_drvdata ls1028a_data = {
+ .version = v1,
+ .dmamuxs = DMAMUX_NR,
+ .mux_swap = true,
+ .setup_irq = fsl_edma_irq_init,
+};
+
static struct fsl_edma_drvdata imx7ulp_data = {
.version = v3,
.dmamuxs = 1,
@@ -243,6 +250,7 @@ static struct fsl_edma_drvdata imx7ulp_d
static const struct of_device_id fsl_edma_dt_ids[] = {
{ .compatible = "fsl,vf610-edma", .data = &vf610_data},
+ { .compatible = "fsl,ls1028a-edma", .data = &ls1028a_data},
{ .compatible = "fsl,imx7ulp-edma", .data = &imx7ulp_data},
{ /* sentinel */ }
};
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