Hi Bin,
On Mon, Jan 9, 2012 at 11:52 AM, Barry Song <barry.s...@csr.com> wrote:
> From: Bin Shi <bin....@csr.com>
>
> This patch moves suspend/resume to dev_pm_ops and add hibernation support.
> It was tested on CSR SiRFprimaII cortex-a9 platform. A sd partition is used
> as swsusp partition.
>
> Signed-off-by: Bin Shi <bin....@csr.com>
> Signed-off-by: Barry Song <barry.s...@csr.com>
> ---
> drivers/mmc/core/bus.c | 38 +++++++++++++++++++++++++-------------
> 1 files changed, 25 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
> index 6be4924..bab50f7 100644
> --- a/drivers/mmc/core/bus.c
> +++ b/drivers/mmc/core/bus.c
> @@ -122,14 +122,14 @@ static int mmc_bus_remove(struct device *dev)
> return 0;
> }
>
> -static int mmc_bus_suspend(struct device *dev, pm_message_t state)
> +static int mmc_bus_suspend(struct device *dev)
> {
> struct mmc_driver *drv = to_mmc_driver(dev->driver);
> struct mmc_card *card = mmc_dev_to_card(dev);
> int ret = 0;
>
> if (dev->driver && drv->suspend)
> - ret = drv->suspend(card, state);
> + ret = drv->suspend(card, PMSG_SUSPEND);
> return ret;
> }
>
> @@ -144,6 +144,17 @@ static int mmc_bus_resume(struct device *dev)
> return ret;
> }
>
> +static int mmc_bus_freeze(struct device *dev)
> +{
> + struct mmc_driver *drv = to_mmc_driver(dev->driver);
> + struct mmc_card *card = mmc_dev_to_card(dev);
> + int ret = 0;
> +
> + if (dev->driver && drv->suspend)
> + ret = drv->suspend(card, PMSG_FREEZE);
Not a comment , rather a doubt
Any particular reason to differenciate freeze and suspend?
> + return ret;
> +}
> +
> #ifdef CONFIG_PM_RUNTIME
>
> static int mmc_runtime_suspend(struct device *dev)
> @@ -165,20 +176,23 @@ static int mmc_runtime_idle(struct device *dev)
> return pm_runtime_suspend(dev);
> }
>
> +#else /* !CONFIG_PM_RUNTIME */
> +#define mmc_runtime_suspend NULL
> +#define mmc_runtime_resume NULL
> +#define mmc_runtime_idle NULL
> +#endif /* !CONFIG_PM_RUNTIME */
> +
> static const struct dev_pm_ops mmc_bus_pm_ops = {
> .runtime_suspend = mmc_runtime_suspend,
> .runtime_resume = mmc_runtime_resume,
> .runtime_idle = mmc_runtime_idle,
> + .suspend = mmc_bus_suspend,
> + .resume = mmc_bus_resume,
> + .freeze = mmc_bus_freeze,
> + .restore = mmc_bus_resume,
> + .thaw = mmc_bus_resume,
> };
>
> -#define MMC_PM_OPS_PTR (&mmc_bus_pm_ops)
> -
> -#else /* !CONFIG_PM_RUNTIME */
> -
> -#define MMC_PM_OPS_PTR NULL
> -
> -#endif /* !CONFIG_PM_RUNTIME */
> -
> static struct bus_type mmc_bus_type = {
> .name = "mmc",
> .dev_attrs = mmc_dev_attrs,
> @@ -186,9 +200,7 @@ static struct bus_type mmc_bus_type = {
> .uevent = mmc_bus_uevent,
> .probe = mmc_bus_probe,
> .remove = mmc_bus_remove,
> - .suspend = mmc_bus_suspend,
> - .resume = mmc_bus_resume,
> - .pm = MMC_PM_OPS_PTR,
> + .pm = &mmc_bus_pm_ops,
> };
>
> int mmc_register_bus(void)
> --
> 1.7.1
>
>
>
> Member of the CSR plc group of companies. CSR plc registered in England and
> Wales, registered number 4187346, registered office Churchill House,
> Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom
> More information can be found at www.csr.com. Follow CSR on Twitter at
> http://twitter.com/CSR_PLC and read our blog at www.csr.com/blog
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