On 28 May 2012 16:33, Subhash Jadavani <subhashj@xxxxxxxxxxxxxx> wrote: > Hi Girish, Saugata, > > There is an issue with this patch during resume. Please find comments inline > below: > >> -----Original Message----- >> From: Girish K S [mailto:girish.shivananjappa@xxxxxxxxxx] >> Sent: Tuesday, May 22, 2012 5:15 PM >> To: linux-mmc@xxxxxxxxxxxxxxx >> Cc: cjb@xxxxxxxxxx; patches@xxxxxxxxxx; ulf.hansson@xxxxxxxxxxxxxx; >> saugata.das@xxxxxxxxxx; subhashj@xxxxxxxxxxxxxx; Girish K S >> Subject: [PATCH v5] MMC-4.5 Power OFF Notify Rework >> >> From: Saugata Das <saugata.das@xxxxxxxxxx> >> >> This is a rework of the existing POWER OFF NOTIFY patch. The current > problem >> with the patch comes from the ambiguity on the usage of POWER OFF NOTIFY >> together with SLEEP and misunderstanding on the usage of MMC_POWER_OFF >> power_mode from mmc_set_ios in different host controller drivers. >> >> This new patch works around this problem by adding a new host CAP, >> MMC_CAP2_POWER_OFF_VCCQ_DURING_SUSPEND, which when set sends a >> POWER OFF NOTIFY from mmc_suspend instead of SLEEP. It is expected that >> host controller drivers will set this CAP, if they switch off both Vcc and > Vccq >> from MMC_POWER_OFF condition within mmc_set_ios. However, note that >> there is no harm in sending MMC_POWER_NOTIFY even if Vccq is not switched >> off. >> >> This patch also sends POWER OFF NOTIFY from power management routines >> (e.g. >> mmc_power_save_host, mmc_pm_notify/PM_SUSPEND_PREPARE, >> mmc_stop_host), which does reinitialization of the eMMC on the return path > of >> the power management routines (e.g. mmc_power_restore_host, >> mmc_pm_notify/PM_POST_RESTORE, mmc_start_host). >> >> This patch sets POWER_OFF_NOTIFICATION to POWER_OFF_SHORT if it is sent >> from the suspend sequence. If it is sent from shutdown sequence then it is > set >> to POWER_OFF_LONG. >> >> Earlier implementation of PowerOff Notify as a core function is replaced > as a >> device's bus operation. >> >> Signed-off-by: Saugata Das <saugata.das@xxxxxxxxxx> >> Signed-off-by: Girish K S <girish.shivananjappa@xxxxxxxxxx> >> >> changes in v5: >> modified the the handling of return value in mmc_poweroff_notify. >> changes in v4: >> As suggested in review, >> - Moved mmc_can_poweroff_notify to core.c >> - Moved mmc_claim_host, mmc_release_host outside >> mmc_poweroff_notify >> - Added check for wrong initialization for poweroff_notify_type >> - mmc_poweroff_notify is modified to take as 2nd parameter changes >> in v3: >> This version addresses the review comments given by Subhash and Ulf >> changes in v2: >> This version addresses the changes suggested by Ulf >> --- >> drivers/mmc/core/core.c | 108 > ++++++++++++++++++-------------------------- >> drivers/mmc/core/core.h | 1 + >> drivers/mmc/core/mmc.c | 56 ++++++++++++++++++++--- >> drivers/mmc/host/dw_mmc.c | 5 -- >> drivers/mmc/host/sdhci.c | 9 ---- >> include/linux/mmc/card.h | 5 +- >> include/linux/mmc/core.h | 1 + >> include/linux/mmc/host.h | 5 +-- >> include/linux/mmc/mmc.h | 7 +++ >> 9 files changed, 104 insertions(+), 93 deletions(-) >> >> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index >> 0b6141d..fe616b9 100644 >> --- a/drivers/mmc/core/core.c >> +++ b/drivers/mmc/core/core.c >> @@ -1101,48 +1101,6 @@ void mmc_set_driver_type(struct mmc_host *host, >> unsigned int drv_type) >> mmc_host_clk_release(host); >> } >> >> -static void mmc_poweroff_notify(struct mmc_host *host) -{ >> - struct mmc_card *card; >> - unsigned int timeout; >> - unsigned int notify_type = EXT_CSD_NO_POWER_NOTIFICATION; >> - int err = 0; >> - >> - card = host->card; >> - mmc_claim_host(host); >> - >> - /* >> - * Send power notify command only if card >> - * is mmc and notify state is 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; >> - timeout = card->ext_csd.generic_cmd6_time; >> - card->poweroff_notify_state = >> MMC_POWEROFF_SHORT; >> - } else { >> - notify_type = EXT_CSD_POWER_OFF_LONG; >> - timeout = card->ext_csd.power_off_longtime; >> - card->poweroff_notify_state = >> MMC_POWEROFF_LONG; >> - } >> - >> - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, >> - EXT_CSD_POWER_OFF_NOTIFICATION, >> - notify_type, timeout); >> - >> - if (err && err != -EBADMSG) >> - pr_err("Device failed to respond within %d poweroff > " >> - "time. Forcefully powering down the > device\n", >> - timeout); >> - >> - /* Set the card state to no notification after the poweroff > */ >> - card->poweroff_notify_state = >> MMC_NO_POWER_NOTIFICATION; >> - } >> - mmc_release_host(host); >> -} >> - >> /* >> * Apply power to the MMC stack. This is a two-stage process. >> * First, we enable power to the card without the clock running. >> @@ -1202,8 +1160,6 @@ static void mmc_power_up(struct mmc_host *host) >> >> void mmc_power_off(struct mmc_host *host) { >> - int err = 0; >> - >> if (host->ios.power_mode == MMC_POWER_OFF) >> return; >> >> @@ -1212,22 +1168,6 @@ void mmc_power_off(struct mmc_host *host) >> host->ios.clock = 0; >> host->ios.vdd = 0; >> >> - /* >> - * For eMMC 4.5 device send AWAKE command before >> - * POWER_OFF_NOTIFY command, because in sleep state >> - * eMMC 4.5 devices respond to only RESET and AWAKE cmd >> - */ >> - if (host->card && mmc_card_is_sleep(host->card) && >> - host->bus_ops->resume) { >> - err = host->bus_ops->resume(host); >> - >> - if (!err) >> - mmc_poweroff_notify(host); >> - else >> - pr_warning("%s: error %d during resume " >> - "(continue with poweroff sequence)\n", >> - mmc_hostname(host), err); >> - } >> >> /* >> * Reset ocr mask to be the highest possible voltage supported for > @@ >> -1726,6 +1666,15 @@ int mmc_can_secure_erase_trim(struct mmc_card >> *card) } EXPORT_SYMBOL(mmc_can_secure_erase_trim); >> >> +int mmc_can_poweroff_notify(const struct mmc_card *card) { >> + return card && >> + mmc_card_mmc(card) && >> + card->host->bus_ops->poweroff_notify && >> + (card->poweroff_notify_state == MMC_POWERED_ON); } >> +EXPORT_SYMBOL(mmc_can_poweroff_notify); >> + >> int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, >> unsigned int nr) >> { >> @@ -2096,6 +2045,15 @@ void mmc_stop_host(struct mmc_host *host) >> >> mmc_bus_get(host); >> if (host->bus_ops && !host->bus_dead) { >> + mmc_claim_host(host); >> + if (mmc_can_poweroff_notify(host->card)) { >> + int err = host->bus_ops->poweroff_notify(host, >> + >> MMC_PW_OFF_NOTIFY_LONG); >> + if (err) >> + pr_info("%s: error [%d] in poweroff > notify\n", >> + mmc_hostname(host), err); >> + } >> + mmc_release_host(host); >> /* Calling bus_ops->remove() with a claimed host can > deadlock >> */ >> if (host->bus_ops->remove) >> host->bus_ops->remove(host); >> @@ -2131,6 +2089,15 @@ int mmc_power_save_host(struct mmc_host *host) >> >> if (host->bus_ops->power_save) >> ret = host->bus_ops->power_save(host); >> + mmc_claim_host(host); >> + if (mmc_can_poweroff_notify(host->card)) { >> + int err = host->bus_ops->poweroff_notify(host, >> + MMC_PW_OFF_NOTIFY_SHORT); >> + if (err) >> + pr_info("%s: error [%d] in poweroff notify\n", >> + mmc_hostname(host), err); >> + } >> + mmc_release_host(host); >> >> mmc_bus_put(host); >> >> @@ -2173,8 +2140,11 @@ int mmc_card_awake(struct mmc_host *host) >> >> mmc_bus_get(host); >> >> - if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) >> + if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) { >> err = host->bus_ops->awake(host); >> + if (!err) >> + mmc_card_clr_sleep(host->card); >> + } >> >> mmc_bus_put(host); >> >> @@ -2191,8 +2161,11 @@ int mmc_card_sleep(struct mmc_host *host) >> >> mmc_bus_get(host); >> >> - if (host->bus_ops && !host->bus_dead && host->bus_ops->sleep) >> + if (host->bus_ops && !host->bus_dead && host->bus_ops->sleep) { >> err = host->bus_ops->sleep(host); >> + if (!err) >> + mmc_card_set_sleep(host->card); >> + } >> >> mmc_bus_put(host); >> >> @@ -2385,12 +2358,20 @@ int mmc_pm_notify(struct notifier_block >> *notify_block, >> >> spin_lock_irqsave(&host->lock, flags); >> host->rescan_disable = 1; >> - host->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT; >> spin_unlock_irqrestore(&host->lock, flags); >> cancel_delayed_work_sync(&host->detect); >> >> if (!host->bus_ops || host->bus_ops->suspend) >> break; >> + mmc_claim_host(host); >> + if (mmc_can_poweroff_notify(host->card)) { >> + int err = host->bus_ops->poweroff_notify(host, >> + >> MMC_PW_OFF_NOTIFY_SHORT); >> + if (err) >> + pr_info("%s: error [%d] in poweroff > notify\n", >> + mmc_hostname(host), err); >> + } >> + mmc_release_host(host); >> >> /* Calling bus_ops->remove() with a claimed host can > deadlock >> */ >> if (host->bus_ops->remove) >> @@ -2409,7 +2390,6 @@ int mmc_pm_notify(struct notifier_block >> *notify_block, >> >> spin_lock_irqsave(&host->lock, flags); >> host->rescan_disable = 0; >> - host->power_notify_type = MMC_HOST_PW_NOTIFY_LONG; >> spin_unlock_irqrestore(&host->lock, flags); >> mmc_detect_change(host, 0); >> >> diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index >> 3bdafbc..15b918d 100644 >> --- a/drivers/mmc/core/core.h >> +++ b/drivers/mmc/core/core.h >> @@ -25,6 +25,7 @@ struct mmc_bus_ops { >> int (*power_save)(struct mmc_host *); >> int (*power_restore)(struct mmc_host *); >> int (*alive)(struct mmc_host *); >> + int (*poweroff_notify)(struct mmc_host *, int notify); >> }; >> >> void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops >> *ops); diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index >> 2f0e11c..042dbdc 100644 >> --- a/drivers/mmc/core/mmc.c >> +++ b/drivers/mmc/core/mmc.c >> @@ -1259,6 +1259,40 @@ err: >> return err; >> } >> >> +static int mmc_poweroff_notify(struct mmc_host *host, int notify) { >> + struct mmc_card *card; >> + unsigned int timeout; >> + unsigned int notify_type = EXT_CSD_NO_POWER_NOTIFICATION; >> + int err; >> + >> + card = host->card; >> + >> + if (notify == MMC_PW_OFF_NOTIFY_SHORT) { >> + notify_type = EXT_CSD_POWER_OFF_SHORT; >> + timeout = card->ext_csd.generic_cmd6_time; >> + } else if (notify == MMC_PW_OFF_NOTIFY_LONG) { >> + notify_type = EXT_CSD_POWER_OFF_LONG; >> + timeout = card->ext_csd.power_off_longtime; >> + } else { >> + pr_info("%s: mmc_poweroff_notify called " >> + "with notify type %d\n", mmc_hostname(host), > notify); >> + return -EINVAL; >> + } >> + >> + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, >> + EXT_CSD_POWER_OFF_NOTIFICATION, >> + notify_type, timeout); >> + >> + if (err) >> + pr_err("%s: Device failed to respond within %d " >> + "poweroff timeout.\n", mmc_hostname(host), timeout); >> + else >> + card->poweroff_notify_state = >> + MMC_NO_POWER_NOTIFICATION; >> + >> + return err; >> +} >> /* >> * Host is being removed. Free up the current card. >> */ >> @@ -1319,13 +1353,18 @@ static int mmc_suspend(struct mmc_host *host) >> BUG_ON(!host->card); >> >> mmc_claim_host(host); >> - if (mmc_card_can_sleep(host)) { >> - err = mmc_card_sleep(host); >> - if (!err) >> - mmc_card_set_sleep(host->card); >> - } else if (!mmc_host_is_spi(host)) >> - mmc_deselect_cards(host); >> - host->card->state &= ~(MMC_STATE_HIGHSPEED | >> MMC_STATE_HIGHSPEED_200); >> + if (mmc_can_poweroff_notify(host->card) && >> + (host->caps2 & >> MMC_CAP2_POWER_OFF_VCCQ_DURING_SUSPEND)) { >> + err = mmc_poweroff_notify(host, >> MMC_PW_OFF_NOTIFY_SHORT); >> + } else { >> + if (mmc_card_can_sleep(host)) >> + err = mmc_card_sleep(host); >> + else if (!mmc_host_is_spi(host)) >> + mmc_deselect_cards(host); >> + } >> + if (!err) >> + host->card->state &= >> + ~(MMC_STATE_HIGHSPEED | >> MMC_STATE_HIGHSPEED_200); >> mmc_release_host(host); >> >> return err; >> @@ -1347,7 +1386,6 @@ static int mmc_resume(struct mmc_host *host) >> mmc_claim_host(host); >> if (mmc_card_is_sleep(host->card)) { >> err = mmc_card_awake(host); >> - mmc_card_clr_sleep(host->card); > > Without this patch, this was the suspend sequence/resume sequence for MMC > cards: > mmc_suspend_host() > -> host->bus_ops->suspend() > -> mmc_suspend() > -> mmc_card_can_sleep() > -> mmc_card_sleep() > -> mmc_card_set_sleep() > -> mmc_power_off() > -> mmc_card_is_sleep(host->card) > -> host->bus_ops->resume() > -> mmc_resume() > -> mmc_card_is_sleep() > -> mmc_card_awake() > -> mmc_card_clr_sleep() > > > mmc_resume_host() > -> mmc_power_up() > -> This sets the buswidth=1, timing=legacy and clock=f_init > -> host->bus_ops->resume() > -> mmc_resume() > -> mmc_card_is_sleep() -> this would return false > because in mmc_suspend_host(), host->bus_ops->resume() call had cleared the > sleep flag. > -> mmc_init_card() -> As card sleep state is cleared, > init_card() will be done which sets up the card again. > > > But with this patch, you have removed the "host->bus_ops->resume()" call > from mmc_power_off() which would mean card sleep state would be set to > MMC_STATE_SLEEP during mmc_resume_host(). > Following is the sequence with this patch: > > mmc_suspend_host() > -> host->bus_ops->suspend() > -> mmc_suspend() > -> mmc_card_can_sleep() > -> mmc_card_sleep() > -> mmc_card_set_sleep() > -> mmc_power_off() > > mmc_resume_host() > -> mmc_power_up() > -> This sets the bus_width=1, timing=legacy and clock=f_init > -> host->bus_ops->resume() > -> mmc_resume() > -> mmc_card_is_sleep() -> this would return true > because card sleep flag is set. > -> mmc_card_awake() > > Block read/write operation: > -> mmc_blk_issue_rw_rq > -> send CMD25 > -> But at this point, bus_width=1, timing=legacy and > clock=f_init. Which is causing card not to respond back to data blocks sent > from card and we are seeing the data timeout errors. > > So basically to fix this, in mmc_resume() either you have to call > mmc_init_card() instead of mmc_card_awake() or if we still want to just call > the mmc_card_awake() from resume, we need to save the state of host->ios > before the sleep command issue so during resume, before calling mmc_awake(), > we need to restore the saved host->ios state back and call mmc_set_ios() to > restore the original parameters. Since the idea was not to go through a costly mmc_init_card during resume, we will do the second approach, i.e. we will save "ios" into a new mmc_host member "saved_ios" in mmc_power_off and restore this "saved_ios" in mmc_power_up, if mmc_card_is_sleep is TRUE. > > Also, I couple of other concerns here: In mmc_suspend_host(), after we put > the card into suspend (host->bus_ops_suspend()), we call mmc_power_off() > which asks the host controller to switch off the eMMC power. Now assume that > a particular host controller driver turns off both VCC and VCCQ rails when > ios.power_mode = MMC_POWER_OFF. > Now in mmc_resume_host(), we call mmc_power_up() which would switch ON the > power back which would mean eMMC card have seen power down and power up > sequence and that means card is no longer in sleep state. And now after > mmc_power_up(), when we call the mmc_card_awake() from mmc_resume(), card > may not even respond to CMD5 awake. So in this scenario, we should actually > call mmc_init_card() to bring the card back to proper state. For this case, where host driver turns off both VCC and VCCQ, we added the cap MMC_CAP2_POWER_OFF_VCCQ_DURING_SUSPEND. This should handle the case you mentioned above, i.e. call mmc_init_card from mmc_resume > > Regards, > Subhash > >> } else >> err = mmc_init_card(host, host->ocr, host->card); >> mmc_release_host(host); >> @@ -1407,6 +1445,7 @@ static const struct mmc_bus_ops mmc_ops = { >> .resume = NULL, >> .power_restore = mmc_power_restore, >> .alive = mmc_alive, >> + .poweroff_notify = mmc_poweroff_notify, >> }; >> >> static const struct mmc_bus_ops mmc_ops_unsafe = { @@ -1418,6 +1457,7 >> @@ static const struct mmc_bus_ops mmc_ops_unsafe = { >> .resume = mmc_resume, >> .power_restore = mmc_power_restore, >> .alive = mmc_alive, >> + .poweroff_notify = mmc_poweroff_notify, >> }; >> >> static void mmc_attach_bus_ops(struct mmc_host *host) diff --git >> a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index >> 1532357..463130f 100644 >> --- a/drivers/mmc/host/dw_mmc.c >> +++ b/drivers/mmc/host/dw_mmc.c >> @@ -1788,11 +1788,6 @@ static int __init dw_mci_init_slot(struct dw_mci >> *host, unsigned int id) >> if (host->pdata->quirks & DW_MCI_QUIRK_HIGHSPEED) >> mmc->caps |= MMC_CAP_SD_HIGHSPEED | >> MMC_CAP_MMC_HIGHSPEED; >> >> - if (mmc->caps2 & MMC_CAP2_POWEROFF_NOTIFY) >> - mmc->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT; >> - else >> - mmc->power_notify_type = MMC_HOST_PW_NOTIFY_NONE; >> - >> if (host->pdata->blk_settings) { >> mmc->max_segs = host->pdata->blk_settings->max_segs; >> mmc->max_blk_size = host->pdata->blk_settings- >> >max_blk_size; >> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index >> e626732..c0a5a91 100644 >> --- a/drivers/mmc/host/sdhci.c >> +++ b/drivers/mmc/host/sdhci.c >> @@ -2812,15 +2812,6 @@ int sdhci_add_host(struct sdhci_host *host) >> if (caps[1] & SDHCI_DRIVER_TYPE_D) >> mmc->caps |= MMC_CAP_DRIVER_TYPE_D; >> >> - /* >> - * If Power Off Notify capability is enabled by the host, >> - * set notify to short power off notify timeout value. >> - */ >> - if (mmc->caps2 & MMC_CAP2_POWEROFF_NOTIFY) >> - mmc->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT; >> - else >> - mmc->power_notify_type = MMC_HOST_PW_NOTIFY_NONE; >> - >> /* Initial value for re-tuning timer count */ >> host->tuning_count = (caps[1] & >> SDHCI_RETUNING_TIMER_COUNT_MASK) >> >> SDHCI_RETUNING_TIMER_COUNT_SHIFT; diff --git >> a/include/linux/mmc/card.h b/include/linux/mmc/card.h index >> d76513b..040eec4 100644 >> --- a/include/linux/mmc/card.h >> +++ b/include/linux/mmc/card.h >> @@ -239,11 +239,10 @@ struct mmc_card { >> #define MMC_QUIRK_BROKEN_BYTE_MODE_512 (1<<8) /* Avoid >> sending 512 bytes in */ >> #define MMC_QUIRK_LONG_READ_TIME (1<<9) /* Data read >> time > CSD says */ >> /* byte mode */ >> - unsigned int poweroff_notify_state; /* eMMC4.5 notify feature */ >> + unsigned int poweroff_notify_state; /* MMC-4.5 poweroff >> + notify feature */ >> #define MMC_NO_POWER_NOTIFICATION 0 >> #define MMC_POWERED_ON 1 >> -#define MMC_POWEROFF_SHORT 2 >> -#define MMC_POWEROFF_LONG 3 >> >> unsigned int erase_size; /* erase size in sectors */ >> unsigned int erase_shift; /* if erase unit is power 2 > */ >> diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index >> 1b431c7..54894d6 100644 >> --- a/include/linux/mmc/core.h >> +++ b/include/linux/mmc/core.h >> @@ -161,6 +161,7 @@ extern int mmc_can_trim(struct mmc_card *card); >> extern int mmc_can_discard(struct mmc_card *card); extern int >> mmc_can_sanitize(struct mmc_card *card); extern int >> mmc_can_secure_erase_trim(struct mmc_card *card); >> +extern int mmc_can_poweroff_notify(const struct mmc_card *card); >> extern int mmc_erase_group_aligned(struct mmc_card *card, unsigned int >> from, >> unsigned int nr); >> extern unsigned int mmc_calc_max_discard(struct mmc_card *card); diff > --git >> a/include/linux/mmc/host.h b/include/linux/mmc/host.h index >> 0707d22..0e9adac 100644 >> --- a/include/linux/mmc/host.h >> +++ b/include/linux/mmc/host.h >> @@ -238,12 +238,9 @@ struct mmc_host { >> #define MMC_CAP2_BROKEN_VOLTAGE (1 << 7) /* Use the broken >> voltage */ >> #define MMC_CAP2_DETECT_ON_ERR (1 << 8) /* On I/O err check > card >> removal */ >> #define MMC_CAP2_HC_ERASE_SZ (1 << 9) /* High-capacity erase size > */ >> +#define MMC_CAP2_POWER_OFF_VCCQ_DURING_SUSPEND (1 << 10) >> >> mmc_pm_flag_t pm_caps; /* supported pm >> features */ >> - 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 >> >> #ifdef CONFIG_MMC_CLKGATE >> int clk_requests; /* internal reference > counter >> */ >> diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index >> d425cab..b11876b 100644 >> --- a/include/linux/mmc/mmc.h >> +++ b/include/linux/mmc/mmc.h >> @@ -386,4 +386,11 @@ struct _mmc_csd { >> #define MMC_SWITCH_MODE_CLEAR_BITS 0x02 /* Clear bits which are >> 1 in value */ >> #define MMC_SWITCH_MODE_WRITE_BYTE 0x03 /* Set target to value >> */ >> >> +/* >> + * MMC Poweroff Notify types >> + */ >> +#define MMC_PW_OFF_NOTIFY_NONE 0 >> +#define MMC_PW_OFF_NOTIFY_SHORT 1 >> +#define MMC_PW_OFF_NOTIFY_LONG 2 >> + >> #endif /* LINUX_MMC_MMC_H */ >> -- >> 1.7.4.1 > > -- 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
