openwrt-xburst/target/linux/s3c24xx/patches-2.6.24/1238-fix-scard-stop-on-resume.patch.patch

From 6ec7d69f08cfb772fdf5d7c55ed9da2273677a4d Mon Sep 17 00:00:00 2001
From: Andy Green <andy@openmoko.com>
Date: Sun, 20 Jul 2008 18:43:15 +0100
Subject: [PATCH] fix-scard-stop-on-resume.patch
 Reported-by: Ville-Pekka Vainio <vpivaini@cs.helsinki.fi>

The reporter noticed SD Card clock is running again after resume.  After
looking at the code I saw I missed two tricks, this will force it off
after resume and will do better generally depending on what the last SD Card
packet was.

Since bulk read packet is normally last action (which set the clock off even
without this) the old patch worked for normal cases.  But after resume, the last
packet on the wire was not a bulk transfer and we didn't take care about the
clock then.

Signed-off-by: Andy Green <andy@openmoko.com>
---
 drivers/mfd/glamo/glamo-mci.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/glamo/glamo-mci.c b/drivers/mfd/glamo/glamo-mci.c
index 6729244..2318e6f 100644
--- a/drivers/mfd/glamo/glamo-mci.c
+++ b/drivers/mfd/glamo/glamo-mci.c
@@ -619,12 +619,9 @@ done:
 	host->complete_what = COMPLETION_NONE;
 	host->mrq = NULL;
 	mmc_request_done(host->mmc, cmd->mrq);
-	return;
-
 bail:
 	/* stop the clock to card */
 	__glamo_mci_fix_card_div(host, -1);
-	return;
 }
 
 static void glamo_mci_request(struct mmc_host *mmc, struct mmc_request *mrq)
@@ -690,6 +687,9 @@ static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	host->real_rate = __glamo_mci_set_card_clock(host, ios->clock, &div);
 	host->clk_div = div;
 
+	/* stop the clock to card, because we are idle until transfer */
+	__glamo_mci_fix_card_div(host, -1);
+
 	if ((ios->power_mode == MMC_POWER_ON) ||
 	    (ios->power_mode == MMC_POWER_UP)) {
 		dev_info(&host->pdev->dev,
-- 
1.5.6.5