linux-kernel - [PATCH 3/3] MMC: OMAP: Clean up omap set_ios and make MMC_POWER

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Date:	Tue, 24 Apr 2007 16:38:19 -0400
From:	Carlos Aguiar <carlos.aguiar@...t.org.br>
To:	Pierre Ossman <drzeus-list@...eus.cx>,
	linux-kernel@...r.kernel.org,
	"Anderson F. Briglia" <anderson.briglia@...t.org.br>
Subject: [PATCH 3/3] MMC: OMAP: Clean up omap set_ios and make MMC_POWER_ON
 work



Move divisor calculation into a separate function and
re-arrange the init order to make MMC_POWER_ON work.

Signed-off-by: Tony Lindgren <tony@...mide.com>

Index: linux-2.6.20/drivers/mmc/omap.c
===================================================================
--- linux-2.6.20.orig/drivers/mmc/omap.c	2007-04-24 15:22:25.000000000 -0400
+++ linux-2.6.20/drivers/mmc/omap.c	2007-04-24 15:22:28.000000000 -0400
@@ -937,33 +937,41 @@ static void mmc_omap_power(struct mmc_om
 	}
 }
 
-static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+static int mmc_omap_calc_divisor(struct mmc_host *mmc, struct mmc_ios *ios)
 {
 	struct mmc_omap_host *host = mmc_priv(mmc);
+	int func_clk_rate = clk_get_rate(host->fclk);
 	int dsor;
-	int realclock, i;
-
-	realclock = ios->clock;
 
 	if (ios->clock == 0)
-		dsor = 0;
-	else {
-		int func_clk_rate = clk_get_rate(host->fclk);
-
-		dsor = func_clk_rate / realclock;
-		if (dsor < 1)
-			dsor = 1;
+		return 0;
 
-		if (func_clk_rate / dsor > realclock)
-			dsor++;
+	dsor = func_clk_rate / ios->clock;
+	if (dsor < 1)
+		dsor = 1;
 
-		if (dsor > 250)
-			dsor = 250;
+	if (func_clk_rate / dsor > ios->clock)
 		dsor++;
 
-		if (ios->bus_width == MMC_BUS_WIDTH_4)
-			dsor |= 1 << 15;
-	}
+	if (dsor > 250)
+		dsor = 250;
+	dsor++;
+
+	if (ios->bus_width == MMC_BUS_WIDTH_4)
+		dsor |= 1 << 15;
+
+	return dsor;
+}
+
+static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+	struct mmc_omap_host *host = mmc_priv(mmc);
+	int dsor;
+	int i;
+
+	dsor = mmc_omap_calc_divisor(mmc, ios);
+	host->bus_mode = ios->bus_mode;
+	host->hw_bus_mode = host->bus_mode;
 
 	switch (ios->power_mode) {
 	case MMC_POWER_OFF:
@@ -978,9 +986,6 @@ static void mmc_omap_set_ios(struct mmc_
 		break;
 	}
 
-	host->bus_mode = ios->bus_mode;
-	host->hw_bus_mode = host->bus_mode;
-
 	clk_enable(host->fclk);
 
 	/* On insanely high arm_per frequencies something sometimes