openwrtv4/target/linux/brcm2708/patches-3.10/0016-Allow-emmc-clock-to-be-specified-as-command-line-par.patch

From f3cbdb41b8e7194b03523eceed5dd8b488f93909 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Sat, 16 Jun 2012 22:31:55 +0100
Subject: [PATCH 016/196] Allow emmc clock to be specified as command line
 parameter

---
 drivers/mmc/host/sdhci-bcm2708.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-bcm2708.c b/drivers/mmc/host/sdhci-bcm2708.c
index d174938..0ee983c 100644
--- a/drivers/mmc/host/sdhci-bcm2708.c
+++ b/drivers/mmc/host/sdhci-bcm2708.c
@@ -130,6 +130,7 @@ static inline unsigned long int since_ns(hptime_t t)
 }
 
 static bool allow_highspeed = 1;
+static int emmc_clock_freq = BCM2708_EMMC_CLOCK_FREQ;
 
 #if 0
 static void hptime_test(void)
@@ -355,7 +356,7 @@ void sdhci_bcm2708_writeb(struct sdhci_host *host, u8 val, int reg)
 
 static unsigned int sdhci_bcm2708_get_max_clock(struct sdhci_host *host)
 {
-	return BCM2708_EMMC_CLOCK_FREQ;
+	return emmc_clock_freq;
 }
 
 /*****************************************************************************\
@@ -1361,6 +1362,7 @@ module_init(sdhci_drv_init);
 module_exit(sdhci_drv_exit);
 
 module_param(allow_highspeed, bool, 0444);
+module_param(emmc_clock_freq, int, 0444);
 
 MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver");
 MODULE_AUTHOR("Broadcom <info@broadcom.com>");
@@ -1368,4 +1370,6 @@ MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("platform:"DRIVER_NAME);
 
 MODULE_PARM_DESC(allow_highspeed, "Allow high speed transfers modes");
+MODULE_PARM_DESC(emmc_clock_freq, "Specify the speed of emmc clock");
+
 
-- 
1.9.1