On 09/24/2017 12:59 PM, Vignesh R wrote:
> Add pm_runtime* calls to cadence-quadspi driver. This is required to
> switch on QSPI power domain on TI 66AK2G SoC during probe.
>
> Signed-off-by: Vignesh R <vigneshr@xxxxxx>
Are you planning to add some more fine-grained PM control later?
> ---
> drivers/mtd/spi-nor/cadence-quadspi.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/drivers/mtd/spi-nor/cadence-quadspi.c b/drivers/mtd/spi-nor/cadence-quadspi.c
> index d9629e8f4798..2c8e6226d267 100644
> --- a/drivers/mtd/spi-nor/cadence-quadspi.c
> +++ b/drivers/mtd/spi-nor/cadence-quadspi.c
> @@ -31,6 +31,7 @@
> #include <linux/of_device.h>
> #include <linux/of.h>
> #include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> #include <linux/sched.h>
> #include <linux/spi/spi.h>
> #include <linux/timer.h>
> @@ -1224,6 +1225,13 @@ static int cqspi_probe(struct platform_device *pdev)
> return -ENXIO;
> }
>
> + pm_runtime_enable(&pdev->dev);
> + ret = pm_runtime_get_sync(&pdev->dev);
> + if (ret < 0) {
> + pm_runtime_put_noidle(&pdev->dev);
> + return ret;
> + }
> +
> ret = clk_prepare_enable(cqspi->clk);
> if (ret) {
> dev_err(dev, "Cannot enable QSPI clock.\n");
> @@ -1275,6 +1283,9 @@ static int cqspi_remove(struct platform_device *pdev)
>
> clk_disable_unprepare(cqspi->clk);
>
> + pm_runtime_put_sync(&pdev->dev);
> + pm_runtime_disable(&pdev->dev);
> +
> return 0;
> }
>
>
--
Best regards,
Marek Vasut
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