Fwd: [PATCH 3/23] Alternative mmc structure to support pxa168, pxa910, mmp2 family SD

From: Philip Rakity <redacted>
Date: December 21, 2010 11:07:46 PM PST
To: "linux-mtd@lists.infradead.org" <redacted>, "linux-arm-kernel@lists.infradead.org" <redacted>
Cc: Mark Brown <redacted>
Subject: [PATCH 3/23] Alternative mmc structure to support pxa168, pxa910, mmp2 family SD


From 53c28d8058538f0b731982aa6f0b4ee38bf52e44 Mon Sep 17 00:00:00 2001
From: Philip Rakity <redacted>
Date: Sun, 19 Dec 2010 19:08:31 -0800
Subject: [PATCH] sdhci: delete clk gating code since not correct

clock gating is using wrong registers for mmp2.
remove code -- future patch will add back support

Signed-off-by: Philip Rakity <redacted>
Signed-off-by: Mark F. Brown <redacted>
---
arch/arm/plat-pxa/include/plat/sdhci.h |    1 -
drivers/mmc/host/sdhci-pxa.c           |    9 ---------
2 files changed, 0 insertions(+), 10 deletions(-)

diff --git a/arch/arm/plat-pxa/include/plat/sdhci.h b/arch/arm/plat-pxa/include/plat/sdhci.h
index 1ab332e..270fb2b 100644
--- a/arch/arm/plat-pxa/include/plat/sdhci.h
+++ b/arch/arm/plat-pxa/include/plat/sdhci.h

@@ -15,7 +15,6 @@

/* pxa specific flag */
/* Require clock free running */
-#define PXA_FLAG_DISABLE_CLOCK_GATING (1<<0)

/* Board design supports 8-bit data on SD/SDIO BUS */
#define PXA_FLAG_SD_8_BIT_CAPABLE_SLOT (1<<2)

diff --git a/drivers/mmc/host/sdhci-pxa.c b/drivers/mmc/host/sdhci-pxa.c
index 5a61208..4713238 100644
--- a/drivers/mmc/host/sdhci-pxa.c
+++ b/drivers/mmc/host/sdhci-pxa.c

@@ -29,9 +29,6 @@

#define DRIVER_NAME	"sdhci-pxa"

-#define SD_FIFO_PARAM		0x104
-#define DIS_PAD_SD_CLK_GATE	0x400
-
struct sdhci_pxa {
	struct sdhci_host		*host;
	struct sdhci_pxa_platdata	*pdata;

@@ -49,7 +46,6 @@ struct sdhci_pxa {

static void set_clock(struct sdhci_host *host, unsigned int clock)
{
	struct sdhci_pxa *pxa = sdhci_priv(host);
-	u32 tmp = 0;

	if (clock == 0) {
		if (pxa->clk_enable) {

@@ -58,11 +54,6 @@ static void set_clock(struct sdhci_host *host, unsigned int clock)

		}
	} else {
		if (0 == pxa->clk_enable) {
-			if (pxa->pdata->flags & PXA_FLAG_DISABLE_CLOCK_GATING) {
-				tmp = readl(host->ioaddr + SD_FIFO_PARAM);
-				tmp |= DIS_PAD_SD_CLK_GATE;
-				writel(tmp, host->ioaddr + SD_FIFO_PARAM);
-			}
			clk_enable(pxa->clk);
			pxa->clk_enable = 1;
		}
-- 
1.6.0.4