diff options
| author | Guodong Xu <guodong@riscstar.com> | 2025-08-22 11:06:28 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2025-09-02 12:37:41 +0530 |
| commit | e73a9a13c99c5a55abfdb8c273651509be1eb5bb (patch) | |
| tree | 629dd674637756200ac69e95b80af0e69c94f7cc | |
| parent | 39ce725e621b256188550492b4b53fb02bfc872e (diff) | |
dmaengine: mmp_pdma: Add clock support
Add support for retrieving and enabling an optional clock during
mmp_pdma_probe(). It is optional because in Marvell devices
such as "marvell,pdma-1.0" the clocks property is not a required
property. But in SpacemiT K1 PDMA, "spacemit,k1-pdma" as the dt
binding schema file stated, clocks is required.
Signed-off-by: Guodong Xu <guodong@riscstar.com>
Link: https://lore.kernel.org/r/20250822-working_dma_0701_v2-v5-2-f5c0eda734cc@riscstar.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/dma/mmp_pdma.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c index a95d31103d30..4a6dbf558237 100644 --- a/drivers/dma/mmp_pdma.c +++ b/drivers/dma/mmp_pdma.c @@ -15,6 +15,7 @@ #include <linux/device.h> #include <linux/platform_data/mmp_dma.h> #include <linux/dmapool.h> +#include <linux/clk.h> #include <linux/of_dma.h> #include <linux/of.h> @@ -1019,6 +1020,7 @@ static int mmp_pdma_probe(struct platform_device *op) { struct mmp_pdma_device *pdev; struct mmp_dma_platdata *pdata = dev_get_platdata(&op->dev); + struct clk *clk; int i, ret, irq = 0; int dma_channels = 0, irq_num = 0; const enum dma_slave_buswidth widths = @@ -1037,6 +1039,10 @@ static int mmp_pdma_probe(struct platform_device *op) if (IS_ERR(pdev->base)) return PTR_ERR(pdev->base); + clk = devm_clk_get_optional_enabled(pdev->dev, NULL); + if (IS_ERR(clk)) + return PTR_ERR(clk); + if (pdev->dev->of_node) { /* Parse new and deprecated dma-channels properties */ if (of_property_read_u32(pdev->dev->of_node, "dma-channels", |