From: Pramod Gurav Date: Mon, 2 May 2016 12:14:03 +0000 (+0530) Subject: spi: qup: Handle clocks in pm_runtime suspend and resume X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=dae1a7700b34eceae049cf8f1567a640528ca4c1;p=linux-beck.git 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 Signed-off-by: Mark Brown --- diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index 810a7fae3479..e42ff613c0e0 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -937,6 +937,10 @@ static int spi_qup_pm_suspend_runtime(struct device *device) config = readl(controller->base + QUP_CONFIG); config |= QUP_CONFIG_CLOCK_AUTO_GATE; writel_relaxed(config, controller->base + QUP_CONFIG); + + clk_disable_unprepare(controller->cclk); + clk_disable_unprepare(controller->iclk); + return 0; } @@ -945,6 +949,15 @@ static int spi_qup_pm_resume_runtime(struct device *device) struct spi_master *master = dev_get_drvdata(device); struct spi_qup *controller = spi_master_get_devdata(master); u32 config; + int ret; + + ret = clk_prepare_enable(controller->iclk); + if (ret) + return ret; + + ret = clk_prepare_enable(controller->cclk); + if (ret) + return ret; /* Disable clocks auto gaiting */ config = readl_relaxed(controller->base + QUP_CONFIG);