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spi: qup: Handle clocks in pm_runtime suspend and resume
Clocks must ne disabled in pm_runtime to achieve some power saving. Enable the clocks when the device is runtime resumed during a transfer. Signed-off-by: Pramod Gurav <pramod.gurav@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -937,6 +937,10 @@ static int spi_qup_pm_suspend_runtime(struct device *device)
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config = readl(controller->base + QUP_CONFIG);
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config |= QUP_CONFIG_CLOCK_AUTO_GATE;
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writel_relaxed(config, controller->base + QUP_CONFIG);
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clk_disable_unprepare(controller->cclk);
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clk_disable_unprepare(controller->iclk);
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return 0;
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}
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@ -945,6 +949,15 @@ static int spi_qup_pm_resume_runtime(struct device *device)
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struct spi_master *master = dev_get_drvdata(device);
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struct spi_qup *controller = spi_master_get_devdata(master);
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u32 config;
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int ret;
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ret = clk_prepare_enable(controller->iclk);
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if (ret)
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return ret;
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ret = clk_prepare_enable(controller->cclk);
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if (ret)
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return ret;
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/* Disable clocks auto gaiting */
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config = readl_relaxed(controller->base + QUP_CONFIG);
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