On 6 November 2014 09:52, Wenyou Yang <wenyou.yang@xxxxxxxxx> wrote:
> Amend the atmel mci pin controller to optionally take a pin control
> handle and set the state of the pins to:
> - "default" on boot, resume and before performing an transfer.
> - "sleep" on suspend().
>
> This should make it possible to optimize energy usage for the pins
> both for the suspend/resume cycle.
>
> Signed-off-by: Wenyou Yang <wenyou.yang@xxxxxxxxx>
> ---
> drivers/mmc/host/atmel-mci.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> index 4df1599..eb4bfbc 100644
> --- a/drivers/mmc/host/atmel-mci.c
> +++ b/drivers/mmc/host/atmel-mci.c
> @@ -39,6 +39,7 @@
> #include <linux/atmel_pdc.h>
> #include <linux/pm.h>
> #include <linux/pm_runtime.h>
> +#include <linux/pinctrl/consumer.h>
>
> #include <asm/cacheflush.h>
> #include <asm/io.h>
> @@ -2385,6 +2386,8 @@ static int __init atmci_probe(struct platform_device *pdev)
> int irq;
> int ret, i;
>
> + pinctrl_pm_select_default_state(&pdev->dev);
Not needed, it's already taken care of from driver core.
> +
> regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> if (!regs)
> return -ENXIO;
> @@ -2568,6 +2571,8 @@ static int atmci_runtime_suspend(struct device *dev)
>
> clk_disable_unprepare(host->mck);
>
> + pinctrl_pm_select_sleep_state(dev);
> +
> return 0;
> }
>
> @@ -2575,6 +2580,8 @@ static int atmci_runtime_resume(struct device *dev)
> {
> struct atmel_mci *host = dev_get_drvdata(dev);
>
> + pinctrl_pm_select_default_state(dev);
> +
> return clk_prepare_enable(host->mck);
> }
> #endif
> --
> 1.7.9.5
>
Kind regards
Uffe
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