diff options
author | Denys Drozdov <denys.drozdov@toradex.com> | 2021-07-15 13:56:30 +0300 |
---|---|---|
committer | Denys Drozdov <denys.drozdov@toradex.com> | 2021-07-15 13:56:30 +0300 |
commit | a9729c9288e7f599d96b298d24fe038eb44bd4eb (patch) | |
tree | 85ee26335ce85a05dcb5906b8e8e879ea0562a5e | |
parent | 7e70ac3f06a59f9ef58810675082da53e9d9dc3c (diff) | |
parent | 909767eaf44d67f51a0eba5dc9260ca43851363c (diff) |
Merge branch '5.4-2.3.x-imx' of https://github.com/Freescale/linux-fslc into 5.4-2.3.x-imx
-rw-r--r-- | drivers/mmc/core/core.c | 74 | ||||
-rw-r--r-- | drivers/mmc/core/core.h | 8 | ||||
-rw-r--r-- | drivers/mmc/core/host.c | 44 | ||||
-rw-r--r-- | drivers/mmc/core/sdio.c | 28 | ||||
-rw-r--r-- | include/linux/mmc/host.h | 3 |
5 files changed, 59 insertions, 98 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 833b6eecc426..986fc225f19a 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2394,80 +2394,6 @@ void mmc_stop_host(struct mmc_host *host) mmc_release_host(host); } -#ifdef CONFIG_PM_SLEEP -/* Do the card removal on suspend if card is assumed removeable - * Do that in pm notifier while userspace isn't yet frozen, so we will be able - to sync the card. -*/ -static int mmc_pm_notify(struct notifier_block *notify_block, - unsigned long mode, void *unused) -{ - struct mmc_host *host = container_of( - notify_block, struct mmc_host, pm_notify); - unsigned long flags; - int err = 0; - - switch (mode) { - case PM_HIBERNATION_PREPARE: - case PM_SUSPEND_PREPARE: - case PM_RESTORE_PREPARE: - spin_lock_irqsave(&host->lock, flags); - host->rescan_disable = 1; - spin_unlock_irqrestore(&host->lock, flags); - cancel_delayed_work_sync(&host->detect); - - if (!host->bus_ops) - break; - - /* Validate prerequisites for suspend */ - if (host->bus_ops->pre_suspend) - err = host->bus_ops->pre_suspend(host); - if (!err) - break; - - if (!mmc_card_is_removable(host)) { - dev_warn(mmc_dev(host), - "pre_suspend failed for non-removable host: " - "%d\n", err); - /* Avoid removing non-removable hosts */ - break; - } - - /* Calling bus_ops->remove() with a claimed host can deadlock */ - host->bus_ops->remove(host); - mmc_claim_host(host); - mmc_detach_bus(host); - mmc_power_off(host); - mmc_release_host(host); - host->pm_flags = 0; - break; - - case PM_POST_SUSPEND: - case PM_POST_HIBERNATION: - case PM_POST_RESTORE: - - spin_lock_irqsave(&host->lock, flags); - host->rescan_disable = 0; - spin_unlock_irqrestore(&host->lock, flags); - _mmc_detect_change(host, 0, false); - - } - - return 0; -} - -void mmc_register_pm_notifier(struct mmc_host *host) -{ - host->pm_notify.notifier_call = mmc_pm_notify; - register_pm_notifier(&host->pm_notify); -} - -void mmc_unregister_pm_notifier(struct mmc_host *host) -{ - unregister_pm_notifier(&host->pm_notify); -} -#endif - /* * mmc_first_nonreserved_index() - get the first index that * is not reserved diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index 21ffc7ecbe78..09a11032d635 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -95,14 +95,6 @@ int mmc_execute_tuning(struct mmc_card *card); int mmc_hs200_to_hs400(struct mmc_card *card); int mmc_hs400_to_hs200(struct mmc_card *card); -#ifdef CONFIG_PM_SLEEP -void mmc_register_pm_notifier(struct mmc_host *host); -void mmc_unregister_pm_notifier(struct mmc_host *host); -#else -static inline void mmc_register_pm_notifier(struct mmc_host *host) { } -static inline void mmc_unregister_pm_notifier(struct mmc_host *host) { } -#endif - void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq); bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq); diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 6a3fe88033bd..b077e071505a 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -33,6 +33,42 @@ static DEFINE_IDA(mmc_host_ida); +#ifdef CONFIG_PM_SLEEP +static int mmc_host_class_prepare(struct device *dev) +{ + struct mmc_host *host = cls_dev_to_mmc_host(dev); + + /* + * It's safe to access the bus_ops pointer, as both userspace and the + * workqueue for detecting cards are frozen at this point. + */ + if (!host->bus_ops) + return 0; + + /* Validate conditions for system suspend. */ + if (host->bus_ops->pre_suspend) + return host->bus_ops->pre_suspend(host); + + return 0; +} + +static void mmc_host_class_complete(struct device *dev) +{ + struct mmc_host *host = cls_dev_to_mmc_host(dev); + + _mmc_detect_change(host, 0, false); +} + +static const struct dev_pm_ops mmc_host_class_dev_pm_ops = { + .prepare = mmc_host_class_prepare, + .complete = mmc_host_class_complete, +}; + +#define MMC_HOST_CLASS_DEV_PM_OPS (&mmc_host_class_dev_pm_ops) +#else +#define MMC_HOST_CLASS_DEV_PM_OPS NULL +#endif + static void mmc_host_classdev_release(struct device *dev) { struct mmc_host *host = cls_dev_to_mmc_host(dev); @@ -43,6 +79,7 @@ static void mmc_host_classdev_release(struct device *dev) static struct class mmc_host_class = { .name = "mmc_host", .dev_release = mmc_host_classdev_release, + .pm = MMC_HOST_CLASS_DEV_PM_OPS, }; int mmc_register_host_class(void) @@ -294,8 +331,6 @@ int mmc_of_parse(struct mmc_host *host) if (device_property_read_bool(dev, "wakeup-source") || device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */ host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ; - if (device_property_read_bool(dev, "pm-ignore-notify")) - host->pm_caps |= MMC_PM_IGNORE_PM_NOTIFY; if (device_property_read_bool(dev, "mmc-ddr-3_3v")) host->caps |= MMC_CAP_3_3V_DDR; if (device_property_read_bool(dev, "mmc-ddr-1_8v")) @@ -487,9 +522,6 @@ int mmc_add_host(struct mmc_host *host) #endif mmc_start_host(host); - if (!(host->pm_caps& MMC_PM_IGNORE_PM_NOTIFY)) - mmc_register_pm_notifier(host); - return 0; } @@ -505,8 +537,6 @@ EXPORT_SYMBOL(mmc_add_host); */ void mmc_remove_host(struct mmc_host *host) { - if (!(host->pm_caps& MMC_PM_IGNORE_PM_NOTIFY)) - mmc_unregister_pm_notifier(host); mmc_stop_host(host); #ifdef CONFIG_DEBUG_FS diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 8d36f7bd780b..3627c9d6452e 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -925,21 +925,37 @@ out: */ static int mmc_sdio_pre_suspend(struct mmc_host *host) { - int i, err = 0; + int i; for (i = 0; i < host->card->sdio_funcs; i++) { struct sdio_func *func = host->card->sdio_func[i]; if (func && sdio_func_present(func) && func->dev.driver) { const struct dev_pm_ops *pmops = func->dev.driver->pm; - if (!pmops || !pmops->suspend || !pmops->resume) { + if (!pmops || !pmops->suspend || !pmops->resume) /* force removal of entire card in that case */ - err = -ENOSYS; - break; - } + goto remove; } } - return err; + return 0; + +remove: + if (!mmc_card_is_removable(host)) { + dev_warn(mmc_dev(host), + "missing suspend/resume ops for non-removable SDIO card\n"); + /* Don't remove a non-removable card - we can't re-detect it. */ + return 0; + } + + /* Remove the SDIO card and let it be re-detected later on. */ + mmc_sdio_remove(host); + mmc_claim_host(host); + mmc_detach_bus(host); + mmc_power_off(host); + mmc_release_host(host); + host->pm_flags = 0; + + return 0; } /* diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 4c5eb3aa8e72..a0e1cf1bef4e 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -281,9 +281,6 @@ struct mmc_host { u32 ocr_avail_sdio; /* SDIO-specific OCR */ u32 ocr_avail_sd; /* SD-specific OCR */ u32 ocr_avail_mmc; /* MMC-specific OCR */ -#ifdef CONFIG_PM_SLEEP - struct notifier_block pm_notify; -#endif u32 max_current_330; u32 max_current_300; u32 max_current_180; |