File 0001-mmc-Adjust-timings-for-power-ramping-up.patch of Package kernel-adaptation-n900

From ceb13ae8156fd0b1fc6a27b352855fc02f651928 Mon Sep 17 00:00:00 2001
From: Dmitry Rozhkov <dmitry.rozhkov@jollamobile.com>
Date: Fri, 10 Aug 2012 15:07:19 +0300
Subject: [PATCH] mmc: Adjust timings for power ramping up

According to p6.4.1.1 of Physical Layer Simplified Specification
Ver3.01 the "host needs to keep power line level less than 0.5V and
more than 1ms before power ramp up". This patch adds a delay
of 10ms before powering up the host.
---
 drivers/mmc/core/core.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 57dcf8f..1c110f3 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -899,6 +899,13 @@ static void mmc_power_up(struct mmc_host *host)
 {
 	int bit;
 
+	/*
+	 * According to p6.4.1.1 of Physical Layer Simplified Specification
+	 * Ver3.01 the "host needs to keep power line level less than 0.5V and
+	 * more than 1ms before power ramp up".
+	 */
+	mmc_delay(10);
+
 	/* If ocr is set, we use it */
 	if (host->ocr)
 		bit = ffs(host->ocr) - 1;
-- 
1.7.9.5