MMC: 2/2 Fix MMC_POWER_UP on some OMAP boards

MMC spec says that we must not enable clock prior to the power
stabilizing. But at least omap16xx needs clock divisor configured
during MMC_POWER_UP.

Signed-off-by: Tony Lindgren <[email protected]>

--- a/drivers/mmc/omap.c
+++ b/drivers/mmc/omap.c
@@ -899,9 +899,16 @@ static void mmc_omap_set_ios(struct mmc_
 	int dsor;
 	int realclock, i;
 
-	realclock = ios->clock;
+	/* According to the MMC spec we must not enable clock prior to
+	 * power stabilizing. But at least omap16xx needs clock dsor
+	 * configured during MMC_POWER_UP.
+	 */
+	if ((ios->power_mode == MMC_POWER_UP) && (ios->clock == 0))
+		realclock = mmc->f_min;
+	else
+		realclock = ios->clock;
 
-	if (ios->clock == 0)
+	if (realclock == 0)
 		dsor = 0;
 	else {
 		int func_clk_rate = clk_get_rate(host->fclk);

---

• Follow-Ups:
  • Re: MMC: 2/2 Fix MMC_POWER_UP on some OMAP boards
    • From: Russell King <[email protected]>

• References:
  • MMC: 1/2 Make OMAP MMC work
    • From: Tony Lindgren <[email protected]>

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