From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johan Rudholm Subject: [PATCH v6 2/2] mmc: sd: add hw_reset callback Date: Fri, 9 Jan 2015 12:08:19 +0100 Message-ID: <1420801699-6274-3-git-send-email-johanru@axis.com> References: <1420801699-6274-1-git-send-email-johanru@axis.com> Return-path: Received: from bes.se.axis.com ([195.60.68.10]:34757 "EHLO bes.se.axis.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756394AbbAILIp (ORCPT ); Fri, 9 Jan 2015 06:08:45 -0500 In-Reply-To: <1420801699-6274-1-git-send-email-johanru@axis.com> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: linux-mmc@vger.kernel.org, Chris Ball , Ulf Hansson Cc: Adrian Hunter , Guennadi Liakhovetski , =?UTF-8?q?David=20Lanzend=C3=B6rfer?= , Jesper Nilsson , Johan Rudholm Enable power cycle and re-initialization of SD cards via the hw_reset bus_ops. Power cycling a buggy SD card sometimes helps it get back on track. Signed-off-by: Johan Rudholm --- drivers/mmc/core/sd.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index 29fccdc..1228ef7 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -1197,6 +1197,12 @@ static int mmc_sd_power_restore(struct mmc_host *host) return ret; } +static int mmc_sd_hw_reset(struct mmc_host *host) +{ + mmc_power_cycle(host, host->card->ocr); + return 0; +} + static const struct mmc_bus_ops mmc_sd_ops = { .remove = mmc_sd_remove, .detect = mmc_sd_detect, @@ -1207,6 +1213,7 @@ static const struct mmc_bus_ops mmc_sd_ops = { .power_restore = mmc_sd_power_restore, .alive = mmc_sd_alive, .shutdown = mmc_sd_suspend, + .hw_reset = mmc_sd_hw_reset, }; /* -- 1.7.2.5