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authorHanna Hawa <hannah@marvell.com>2017-05-05 12:57:53 +0300
committerVinod Koul <vinod.koul@intel.com>2017-05-14 15:54:46 +0300
commitecfa77145b13138677c25b4c117d5043bb98cbc8 (patch)
treecfede9c6b825de8721ce6826e3aa67323744a2b1 /drivers/dma/mv_xor_v2.c
parent35e34480c5177f96d822b8ea8e9e42b5fcca6ff6 (diff)
downloadlinux-ecfa77145b13138677c25b4c117d5043bb98cbc8.tar.xz
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: Hanna Hawa <hannah@marvell.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/mv_xor_v2.c')
-rw-r--r--drivers/dma/mv_xor_v2.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/dma/mv_xor_v2.c b/drivers/dma/mv_xor_v2.c
index f386b88bb50c..f652a0e0f5a2 100644
--- a/drivers/dma/mv_xor_v2.c
+++ b/drivers/dma/mv_xor_v2.c
@@ -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",