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dmaengine: dw: platform: Mark 'hclk' clock optional 

On some platforms the clock can be fixed rate, always running one and
there is no need to do anything with it.

In order to support those platforms, switch to use optional clock.

Fixes: f8d9ddbc28 ("dmaengine: dw: platform: Enable iDMA 32-bit on Intel Elkhart Lake")
Depends-on: 60b8f0ddf1 ("clk: Add (devm_)clk_get_optional() functions")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20190924085116.83683-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Andy Shevchenko 2019-09-24 11:51:16 +03:00 committed by Vinod Koul
parent 833b482426
commit f27c22736d
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/dw/platform.c
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@ -66,7 +66,7 @@ static int dw_probe(struct platform_device *pdev)
data->chip = chip;
chip->clk = devm_clk_get(chip->dev, "hclk");
chip->clk = devm_clk_get_optional(chip->dev, "hclk");
if (IS_ERR(chip->clk))
return PTR_ERR(chip->clk);
err = clk_prepare_enable(chip->clk);