When requesting clock in the platform driver, leaving
chip->clk value as NULL if -ENOENT is returned, and
continue. With other errors returning failure. It makes the
driver usable on platforms that do not provide the clock.
Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
---
drivers/dma/dw/platform.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c
index 32ea1ac..b183bc0 100644
--- a/drivers/dma/dw/platform.c
+++ b/drivers/dma/dw/platform.c
@@ -180,8 +180,12 @@ static int dw_probe(struct platform_device *pdev)
chip->dev = dev;
chip->clk = devm_clk_get(chip->dev, "hclk");
- if (IS_ERR(chip->clk))
- return PTR_ERR(chip->clk);
+ if (IS_ERR(chip->clk)) {
+ if (PTR_ERR(chip->clk) == -ENOENT)
+ chip->clk = NULL;
+ else
+ return PTR_ERR(chip->clk);
+ }
err = clk_prepare_enable(chip->clk);
if (err)
return err;
--
2.1.4
--
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