Commit 161596fd authored by Biju Das's avatar Biju Das Committed by Vinod Koul
Browse files

dmaengine: sh: rz-dmac: Add DMA clock handling 



Currently, DMA clocks are turned on by the bootloader.
This patch adds support for DMA clock handling so that
the driver manages the DMA clocks.

Fixes: 5000d370 ("dmaengine: sh: Add DMAC driver for RZ/G2L SoC")
Signed-off-by: default avatarBiju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20210923102451.11403-1-biju.das.jz@bp.renesas.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent c5b64b68

drivers/dma/sh/rz-dmac.c

+14 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/of_dma.h>

#include <linux/of_platform.h>

#include <linux/platform_device.h>

#include <linux/pm_runtime.h>

#include <linux/slab.h>

#include <linux/spinlock.h>
@@ -872,6 +873,13 @@ static int rz_dmac_probe(struct platform_device *pdev) 
	/* Initialize the channels. */

	INIT_LIST_HEAD(&dmac->engine.channels);



	pm_runtime_enable(&pdev->dev);

	ret = pm_runtime_resume_and_get(&pdev->dev);

	if (ret < 0) {

		dev_err(&pdev->dev, "pm_runtime_resume_and_get failed\n");

		goto err_pm_disable;

	}



	for (i = 0; i < dmac->n_channels; i++) {

		ret = rz_dmac_chan_probe(dmac, &dmac->channels[i], i);

		if (ret < 0)
@@ -925,6 +933,10 @@ static int rz_dmac_probe(struct platform_device *pdev) 
				  channel->lmdesc.base_dma);

	}



	pm_runtime_put(&pdev->dev);

err_pm_disable:

	pm_runtime_disable(&pdev->dev);



	return ret;

}
@@ -943,6 +955,8 @@ static int rz_dmac_remove(struct platform_device *pdev) 
	}

	of_dma_controller_free(pdev->dev.of_node);

	dma_async_device_unregister(&dmac->engine);

	pm_runtime_put(&pdev->dev);

	pm_runtime_disable(&pdev->dev);



	return 0;

}