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From 674d82a3db9b47a7772ac732a560979ea22d5c3d Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Wed, 3 Oct 2012 21:31:48 +0100
Subject: [PATCH 037/196] Allow the number of cycles delay between sdcard
peripheral writes to be specified on command line with
sdhci-bcm2708.cycle_delay
---
drivers/mmc/host/sdhci-bcm2708.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci-bcm2708.c b/drivers/mmc/host/sdhci-bcm2708.c
index 7ce2829..ffd7310 100644
--- a/drivers/mmc/host/sdhci-bcm2708.c
+++ b/drivers/mmc/host/sdhci-bcm2708.c
@@ -77,6 +77,8 @@
#define REG_EXRDFIFO_EN 0x80
#define REG_EXRDFIFO_CFG 0x84
+int cycle_delay=2;
+
/*****************************************************************************\
* *
* Debug *
@@ -249,7 +251,7 @@ static void sdhci_bcm2708_raw_writel(struct sdhci_host *host, u32 val, int reg)
/* host->clock is the clock freq in Hz */
static hptime_t last_write_hpt;
hptime_t now = hptime();
- ns_2clk = 2000000000/host->clock;
+ ns_2clk = cycle_delay*1000000/(host->clock/1000);
if (now == last_write_hpt || now == last_write_hpt+1) {
/* we can't guarantee any significant time has
@@ -1388,6 +1390,7 @@ module_param(emmc_clock_freq, int, 0444);
module_param(sync_after_dma, bool, 0444);
module_param(missing_status, bool, 0444);
module_param(enable_llm, bool, 0444);
+module_param(cycle_delay, int, 0444);
MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver");
MODULE_AUTHOR("Broadcom <info@broadcom.com>");
--
1.9.1
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