From 674d82a3db9b47a7772ac732a560979ea22d5c3d Mon Sep 17 00:00:00 2001 From: popcornmix 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 "); -- 1.9.1