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Commit ecfa7714 authored by Hanna Hawa's avatar Hanna Hawa Committed by Vinod Koul
Browse files

dmaengine: mv_xor_v2: add support for suspend/resume 



This commit adds the support for suspend/resume in the mv_xor_v2
driver. The suspend suspend function disables the XOR engine after the
DMA stack has handled all pending descriptors in the queue. The resume
function re-configures the XOR engine and re-enables the engine.

Signed-off-by: default avatarHanna Hawa <hannah@marvell.com>
Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 35e34480

drivers/dma/mv_xor_v2.c

+23 −0
Original line number Diff line number Diff line
@@ -696,6 +696,27 @@ static int mv_xor_v2_descq_init(struct mv_xor_v2_device *xor_dev) 
	return 0;

}



static int mv_xor_v2_suspend(struct platform_device *dev, pm_message_t state)

{

	struct mv_xor_v2_device *xor_dev = platform_get_drvdata(dev);



	/* Set this bit to disable to stop the XOR unit. */

	writel(0x1, xor_dev->dma_base + MV_XOR_V2_DMA_DESQ_STOP_OFF);



	return 0;

}



static int mv_xor_v2_resume(struct platform_device *dev)

{

	struct mv_xor_v2_device *xor_dev = platform_get_drvdata(dev);



	mv_xor_v2_set_desc_size(xor_dev);

	mv_xor_v2_enable_imsg_thrd(xor_dev);

	mv_xor_v2_descq_init(xor_dev);



	return 0;

}



static int mv_xor_v2_probe(struct platform_device *pdev)

{

	struct mv_xor_v2_device *xor_dev;
@@ -877,6 +898,8 @@ MODULE_DEVICE_TABLE(of, mv_xor_v2_dt_ids); 


static struct platform_driver mv_xor_v2_driver = {

	.probe		= mv_xor_v2_probe,

	.suspend	= mv_xor_v2_suspend,

	.resume		= mv_xor_v2_resume,

	.remove		= mv_xor_v2_remove,

	.driver		= {

		.name	= "mv_xor_v2",