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spi/bcm63xx-hsspi: allow providing clock rate through a second clock

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The HSSPI block actually has two clock inputs, one for gating the block,
and one for the PLL rate. To allow these to be represented as two clocks,
add support for retrieving the rate from a separate "pll" clock, if the
"hsspi" clock does not provide one.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jonas Gorski 2017-03-01 10:08:12 +01:00 committed by Mark Brown
parent ccd0657c33
commit ff18e1ef04
1 changed files with 10 additions and 2 deletions
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12
drivers/spi/spi-bcm63xx-hsspi.c
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@ -351,8 +351,16 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev)
return PTR_ERR(clk);
rate = clk_get_rate(clk);
if (!rate)
return -EINVAL;
if (!rate) {
struct clk *pll_clk = devm_clk_get(dev, "pll");
if (IS_ERR(pll_clk))
return PTR_ERR(pll_clk);
rate = clk_get_rate(pll_clk);
if (!rate)
return -EINVAL;
}
ret = clk_prepare_enable(clk);
if (ret)