Looks good to me.
Acked-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
Best Regards,
Jaehoon Chung
On 03/12/2013 07:43 PM, James Hogan wrote:
> Call the setpower platform callback in response to set_ios with
> ios->power_mode == MMC_POWER_UP or MMC_POWER_OFF, instead of from the
> card detect work function.
>
> This appears to fix a problem I have where a card stuck in a funny state
> doesn't get properly cleared by the power being turned off, presumably
> due to lack of power sequencing. This resulted in the following log
> messages after boot:
>
> mmc0: error -110 whilst initialising SD card
> mmc_host mmc0: Bus speed (slot 0) = 99840000Hz (slot req 300000Hz, actual 298922HZ div = 167)
> mmc0: error -110 whilst initialising SD card
> mmc_host mmc0: Bus speed (slot 0) = 99840000Hz (slot req 200000Hz, actual 199680HZ div = 250)
> mmc0: error -110 whilst initialising SD card
> mmc_host mmc0: Bus speed (slot 0) = 99840000Hz (slot req 195765Hz, actual 195764HZ div = 255)
> mmc0: error -110 whilst initialising SD card
> mmc_host mmc0: Bus speed (slot 0) = 99840000Hz (slot req 400000Hz, actual 399360HZ div = 125)
> mmc0: error -110 whilst initialising SD card
> mmc_host mmc0: Bus speed (slot 0) = 99840000Hz (slot req 300000Hz, actual 298922HZ div = 167)
>
> Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
> Cc: Seungwon Jeon <tgih.jun@xxxxxxxxxxx>
> Cc: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
> Cc: Chris Ball <cjb@xxxxxxxxxx>
> ---
> drivers/mmc/host/dw_mmc.c | 16 ++++++++--------
> 1 file changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index 60063cc..1a42c7c 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -818,6 +818,14 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
> switch (ios->power_mode) {
> case MMC_POWER_UP:
> set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags);
> + /* Power up slot */
> + if (slot->host->pdata->setpower)
> + slot->host->pdata->setpower(slot->id, mmc->ocr_avail);
> + break;
> + case MMC_POWER_OFF:
> + /* Power down slot */
> + if (slot->host->pdata->setpower)
> + slot->host->pdata->setpower(slot->id, 0);
> break;
> default:
> break;
> @@ -1674,10 +1682,6 @@ static void dw_mci_work_routine_card(struct work_struct *work)
> dev_dbg(&slot->mmc->class_dev, "card %s\n",
> present ? "inserted" : "removed");
>
> - /* Power up slot (before spin_lock, may sleep) */
> - if (present != 0 && host->pdata->setpower)
> - host->pdata->setpower(slot->id, mmc->ocr_avail);
> -
> spin_lock_bh(&host->lock);
>
> /* Card change detected */
> @@ -1760,10 +1764,6 @@ static void dw_mci_work_routine_card(struct work_struct *work)
>
> spin_unlock_bh(&host->lock);
>
> - /* Power down slot (after spin_unlock, may sleep) */
> - if (present == 0 && host->pdata->setpower)
> - host->pdata->setpower(slot->id, 0);
> -
> present = dw_mci_get_cd(mmc);
> }
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
