Return-path: Received: from mail-fx0-f46.google.com ([209.85.161.46]:49491 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756511Ab0IGL3o (ORCPT ); Tue, 7 Sep 2010 07:29:44 -0400 From: Ohad Ben-Cohen To: , Cc: Luciano Coelho , , San Mehat , Roger Quadros , Nicolas Pitre , Gao Yunpeng , Ohad Ben-Cohen Subject: [PATCH v1 4/8] mmc: add general Runtime PM support Date: Tue, 7 Sep 2010 14:29:05 +0300 Message-Id: <1283858949-11073-5-git-send-email-ohad@wizery.com> In-Reply-To: <1283858949-11073-1-git-send-email-ohad@wizery.com> References: <1283858949-11073-1-git-send-email-ohad@wizery.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: Add runtime PM handlers to mmc, which call mmc_power_save_host and mmc_power_restore_host in response to runtime_suspend and runtime_resume events. Runtime PM is still disabled by default, so this patch alone has no immediate effect. Signed-off-by: Ohad Ben-Cohen --- drivers/mmc/core/bus.c | 37 +++++++++++++++++++++++++++++++++++++ 1 files changed, 37 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index 7cd9749..a302e57 100644 --- a/drivers/mmc/core/bus.c +++ b/drivers/mmc/core/bus.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -142,6 +143,41 @@ static int mmc_bus_resume(struct device *dev) return ret; } +#ifdef CONFIG_PM_RUNTIME + +static int mmc_runtime_suspend(struct device *dev) +{ + struct mmc_card *card = dev_to_mmc_card(dev); + + return mmc_power_save_host(card->host); +} + +static int mmc_runtime_resume(struct device *dev) +{ + struct mmc_card *card = dev_to_mmc_card(dev); + + return mmc_power_restore_host(card->host); +} + +static int mmc_runtime_idle(struct device *dev) +{ + return pm_runtime_suspend(dev); +} + +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, +}; + +#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, @@ -151,6 +187,7 @@ static struct bus_type mmc_bus_type = { .remove = mmc_bus_remove, .suspend = mmc_bus_suspend, .resume = mmc_bus_resume, + .pm = MMC_PM_OPS_PTR, }; int mmc_register_bus(void) -- 1.7.0.4