From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Hunter Subject: [PATCH V2 7/10] omap_hsmmc: Allow for power saving without going off Date: Sun, 17 Jan 2010 03:33:43 +0200 Message-ID: <20100117013343.17308.97040.sendpatchset@ahunter-work.research.nokia.com> References: <20100117013250.17308.17861.sendpatchset@ahunter-work.research.nokia.com> Return-path: Received: from smtp.nokia.com ([192.100.105.134]:37161 "EHLO mgw-mx09.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753261Ab0AQBeR (ORCPT ); Sat, 16 Jan 2010 20:34:17 -0500 In-Reply-To: <20100117013250.17308.17861.sendpatchset@ahunter-work.research.nokia.com> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Tony Lindgren Cc: Adrian Hunter , Madhusudhan Chikkature , Paul Walmsley , linux-omap Mailing List , linux-mmc Mailing List , Andrew Morton >>From 9906604c602bff545e09cd78070c1c26b4ee8855 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Tue, 5 Jan 2010 14:14:07 +0200 Subject: [PATCH] omap_hsmmc: Allow for power saving without going off An eMMC may be always powered on, so that the lowest power saving state possible is sleeping. Add a field to the platform data to indicate that. Signed-off-by: Adrian Hunter --- arch/arm/mach-omap2/hsmmc.c | 3 +++ arch/arm/mach-omap2/hsmmc.h | 1 + arch/arm/plat-omap/include/plat/mmc.h | 3 +++ drivers/mmc/host/omap_hsmmc.c | 6 ++++++ 4 files changed, 13 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c index 0ac5e4e..7e63296 100644 --- a/arch/arm/mach-omap2/hsmmc.c +++ b/arch/arm/mach-omap2/hsmmc.c @@ -201,6 +201,9 @@ void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers) if (c->power_saving) mmc->slots[0].power_saving = 1; + if (c->no_off) + mmc->slots[0].no_off = 1; + /* NOTE: MMC slots should have a Vcc regulator set up. * This may be from a TWL4030-family chip, another * controllable regulator, or a fixed supply. diff --git a/arch/arm/mach-omap2/hsmmc.h b/arch/arm/mach-omap2/hsmmc.h index f641f59..2453a7a 100644 --- a/arch/arm/mach-omap2/hsmmc.h +++ b/arch/arm/mach-omap2/hsmmc.h @@ -14,6 +14,7 @@ struct omap2_hsmmc_info { bool cover_only; /* No card detect - just cover switch */ bool nonremovable; /* Nonremovable e.g. eMMC */ bool power_saving; /* Try to sleep or power off when possible */ + bool no_off; /* power_saving and power is not to go off */ int gpio_cd; /* or -EINVAL */ int gpio_wp; /* or -EINVAL */ char *name; /* or NULL for default */ diff --git a/arch/arm/plat-omap/include/plat/mmc.h b/arch/arm/plat-omap/include/plat/mmc.h index 8b23d32..b463949 100644 --- a/arch/arm/plat-omap/include/plat/mmc.h +++ b/arch/arm/plat-omap/include/plat/mmc.h @@ -96,6 +96,9 @@ struct omap_mmc_platform_data { /* Try to sleep or power off when possible */ unsigned power_saving:1; + /* If using power_saving and the MMC power is not to go off */ + unsigned no_off:1; + int switch_pin; /* gpio (card detect) */ int gpio_wp; /* gpio (write protect) */ diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 2c5e15d..e15d0f4 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -1656,6 +1656,9 @@ static int omap_hsmmc_disabled_to_sleep(struct omap_hsmmc_host *host) dev_dbg(mmc_dev(host->mmc), "DISABLED -> %s\n", host->dpm_state == CARDSLEEP ? "CARDSLEEP" : "REGSLEEP"); + if (mmc_slot(host).no_off) + return 0; + if ((host->mmc->caps & MMC_CAP_NONREMOVABLE) || mmc_slot(host).card_detect || (mmc_slot(host).get_cover_state && @@ -1671,6 +1674,9 @@ static int omap_hsmmc_sleep_to_off(struct omap_hsmmc_host *host) if (!mmc_try_claim_host(host->mmc)) return 0; + if (mmc_slot(host).no_off) + return 0; + if (!((host->mmc->caps & MMC_CAP_NONREMOVABLE) || mmc_slot(host).card_detect || (mmc_slot(host).get_cover_state && -- 1.6.0.4