Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753085AbZG1Kjo (ORCPT ); Tue, 28 Jul 2009 06:39:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753019AbZG1Kjm (ORCPT ); Tue, 28 Jul 2009 06:39:42 -0400 Received: from smtp.nokia.com ([192.100.105.134]:16481 "EHLO mgw-mx09.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753026AbZG1Kjk (ORCPT ); Tue, 28 Jul 2009 06:39:40 -0400 From: Adrian Hunter To: Andrew Morton Cc: Jarkko Lavinen , Adrian Hunter , linux-omap Mailing List , Pierre Ossman , Denis Karpov , Matt Fleming , lkml Date: Tue, 28 Jul 2009 13:39:57 +0300 Message-Id: <20090728103957.2371.82161.sendpatchset@ahunter-laptop> In-Reply-To: <20090728103834.2371.65809.sendpatchset@ahunter-laptop> References: <20090728103834.2371.65809.sendpatchset@ahunter-laptop> Subject: [PATCH V2 11/32] ARM: OMAP: mmc-twl4030: add context loss counter support X-OriginalArrivalTime: 28 Jul 2009 10:39:25.0327 (UTC) FILETIME=[AD1791F0:01CA0F6F] X-Nokia-AV: Clean Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2588 Lines: 75 >From 53270a4f00a21cdf90bc6d93fa4cfc229096cc15 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 1541fd4..5be3111 100644 --- a/arch/arm/mach-omap2/mmc-twl4030.c +++ b/arch/arm/mach-omap2/mmc-twl4030.c @@ -192,6 +192,18 @@ 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) { @@ -384,6 +396,9 @@ 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/