From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Fri, 25 Feb 2011 15:58:38 +0000 (+0100)
Subject: mmc: sh_mmcif: support aggressive clock gating
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f5e0cec4495398b259b3ede7cbc3ce4bd0e1cef0;p=linux-beck.git

mmc: sh_mmcif: support aggressive clock gating

To support MMC aggressive clock gating the driver has to stop the
interface clock when the .set_ios() method is called with .clock == 0.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---

diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index aea86262ed66..af97015a2fc7 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -844,15 +844,15 @@ static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	struct sh_mmcif_host *host = mmc_priv(mmc);
 	struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
 
-	if (ios->power_mode == MMC_POWER_OFF) {
+	if (ios->power_mode == MMC_POWER_UP) {
+		if (p->set_pwr)
+			p->set_pwr(host->pd, ios->power_mode);
+	} else if (ios->power_mode == MMC_POWER_OFF || !ios->clock) {
 		/* clock stop */
 		sh_mmcif_clock_control(host, 0);
-		if (p->down_pwr)
+		if (ios->power_mode == MMC_POWER_OFF && p->down_pwr)
 			p->down_pwr(host->pd);
 		return;
-	} else if (ios->power_mode == MMC_POWER_UP) {
-		if (p->set_pwr)
-			p->set_pwr(host->pd, ios->power_mode);
 	}
 
 	if (ios->clock)