From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Hunter Subject: [PATCH V3 10/30] ARM: OMAP: mmc-twl4030: add context loss counter support Date: Wed, 09 Sep 2009 14:57:47 +0300 Message-ID: <20090909115747.12833.12983.sendpatchset@ahunter-laptop> References: <20090909115633.12833.39619.sendpatchset@ahunter-laptop> Return-path: Received: from smtp.nokia.com ([192.100.122.233]:42843 "EHLO mgw-mx06.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752249AbZIIL5o (ORCPT ); Wed, 9 Sep 2009 07:57:44 -0400 In-Reply-To: <20090909115633.12833.39619.sendpatchset@ahunter-laptop> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Andrew Morton Cc: Jarkko Lavinen , Adrian Hunter , Madhusudhan Chikkature , linux-mmc Mailing List , linux-omap Mailing List , Pierre Ossman , Matt Fleming >>From 027d57463031f291c704f3048c49765c02e661b1 Mon Sep 17 00:00:00 2001 From: Denis Karpov Date: Tue, 7 Jul 2009 15:54:44 +0300 Subject: [PATCH] ARM: OMAP: mmc-twl4030: add context loss counter support PM dynamic OFF state results in context loss. That is, the host controller has been powered off at some point, which means the registers have been reset. The driver must detect when this happens, and restore the context. This patch adds the means to detect context loss. Note, the PM side is not yet implemented. Signed-off-by: Denis Karpov Signed-off-by: Adrian Hunter --- arch/arm/mach-omap2/mmc-twl4030.c | 15 +++++++++++++++ arch/arm/plat-omap/include/mach/mmc.h | 3 +++ 2 files changed, 18 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-omap2/mmc-twl4030.c b/arch/arm/mach-omap2/mmc-twl4030.c index 3c04c2f..30d0286 100644 --- a/arch/arm/mach-omap2/mmc-twl4030.c +++ b/arch/arm/mach-omap2/mmc-twl4030.c @@ -198,6 +198,18 @@ static int twl_mmc_resume(struct device *dev, int slot) #define twl_mmc_resume NULL #endif +#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM) + +static int twl4030_mmc_get_context_loss(struct device *dev) +{ + /* FIXME: PM DPS not implemented yet */ + return 0; +} + +#else +#define twl4030_mmc_get_context_loss NULL +#endif + static int twl_mmc1_set_power(struct device *dev, int slot, int power_on, int vdd) { @@ -390,6 +402,9 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers) } else mmc->slots[0].switch_pin = -EINVAL; + mmc->get_context_loss_count = + twl4030_mmc_get_context_loss; + /* write protect normally uses an OMAP gpio */ if (gpio_is_valid(c->gpio_wp)) { gpio_request(c->gpio_wp, "mmc_wp"); diff --git a/arch/arm/plat-omap/include/mach/mmc.h b/arch/arm/plat-omap/include/mach/mmc.h index 81d5b36..2f7cf31 100644 --- a/arch/arm/plat-omap/include/mach/mmc.h +++ b/arch/arm/plat-omap/include/mach/mmc.h @@ -59,6 +59,9 @@ struct omap_mmc_platform_data { int (*suspend)(struct device *dev, int slot); int (*resume)(struct device *dev, int slot); + /* Return context loss count due to PM states changing */ + int (*get_context_loss_count)(struct device *dev); + u64 dma_mask; struct omap_mmc_slot_data { -- 1.5.6.3