On 17 October 2011 20:17, Girish K S <[email protected]> wrote:
> This patch adds the support for power off notify feature, available in
> eMMC 4.5 devices. If the the host has support for this feature, then the
> mmc core will notify it to the device by setting the POWER_OFF_NOTIFICATION
> byte in the extended csd register with a value 1(POWER_ON).
>
> For suspend mode short timeout is used, whereas for the normal poweroff long
> timeout is used.
>
> cc: Chris Ball <[email protected]>
> Signed-off-by: Girish K S <[email protected]>
> Signed-off-by: Jaehoon Chung <[email protected]>
> ---
> Changes in V8:
> Updated with review comments of Chris Ball and rebased to
> chris-mmc/mmc-next branch.
> Changes in V7:
> Rebased to chris-mmc/mmc-next branch. merged to patches
> to single patch.
> Changes in V6:
> Fixes checkpatch errors. The patches are generated after
> rebasing to chris's mmc-next branch.
> Changes in V5:
> This patch version fixes the problem with power off
> notify function, when called for the first time and
> card is not yet initialised.
> Changes in V4:
> Updated with review comments of Jeon
> Changes in V2:
> Adds poweroff notification handling in suspend/normal.
>
>
> drivers/mmc/core/core.c | 6 ++----
> include/linux/mmc/host.h | 2 +-
> 2 files changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index db368b2..b1eca96 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -1217,16 +1217,14 @@ void mmc_power_off(struct mmc_host *host)
> unsigned int timeout;
> int err;
>
> - BUG_ON(!host);
> -
> mmc_host_clk_hold(host);
>
> card = host->card;
> host->ios.clock = 0;
> host->ios.vdd = 0;
>
> - if (card != NULL && mmc_card_mmc(card) &&
> - (card->poweroff_notify_state == MMC_POWERED_ON)) {
> + if (card && mmc_card_mmc(card) &&
> + card->poweroff_notify_state == MMC_POWERED_ON) {
>
> if (host->power_notify_type == MMC_HOST_PW_NOTIFY_SHORT) {
> notify_type = EXT_CSD_POWER_OFF_SHORT;
> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
> index 65c47fc..a991ae7 100644
> --- a/include/linux/mmc/host.h
> +++ b/include/linux/mmc/host.h
> @@ -243,7 +243,7 @@ struct mmc_host {
> #define MMC_CAP2_POWEROFF_NOTIFY (1 << 2) /* Notify poweroff supported
> */
>
> mmc_pm_flag_t pm_caps; /* supported pm features */
> - unsigned int power_notify_type;
> + unsigned int power_notify_type;
> #define MMC_HOST_PW_NOTIFY_NONE 0
> #define MMC_HOST_PW_NOTIFY_SHORT 1
> #define MMC_HOST_PW_NOTIFY_LONG 2
> --
Ignore this patch. this just gives only the diff with previous patch.
i will resend the complete patch
> 1.7.1
>
>
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