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

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commit f27c22736d133baff0ab3fdc7b015d998267d817 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2019-09-24 11:51:16 +03:00 committed by Greg Kroah-Hartman
parent 5f17dcfa6d
commit 8fa2c2ca23
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);