From: Andy Shevchenko andriy.shevchenko@linux.intel.com
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: f8d9ddbc2851 ("dmaengine: dw: platform: Enable iDMA 32-bit on Intel Elkhart Lake") Depends-on: 60b8f0ddf1a9 ("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.int... Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/dma/dw/platform.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/dma/dw/platform.c +++ b/drivers/dma/dw/platform.c @@ -66,7 +66,7 @@ static int dw_probe(struct platform_devi
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);