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Allow emmc clock to be specified as command line parameter

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commit 819cbdd1d18f150070257737b0b20de6536eac48 1 parent 4144c02
@popcornmix popcornmix authored
Showing with 5 additions and 1 deletion.
  1. +5 −1 drivers/mmc/host/sdhci-bcm2708.c
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6 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");
+
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