dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform (ed5a0ab4) · Commits · 戴 / test

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 −0

Original line number	Diff line number	Diff line
		@@ -109,10 +109,15 @@ void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan,
		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);

drivers/dma/fsl-edma-common.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -147,6 +147,7 @@ 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);
		};

drivers/dma/fsl-edma.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -233,6 +233,13 @@ static struct fsl_edma_drvdata vf610_data = {
		.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,
		@@ -242,6 +249,7 @@ static struct fsl_edma_drvdata imx7ulp_data = {

		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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