diff options
Diffstat (limited to 'target/linux/brcm2708/patches-3.10/0037-Allow-the-number-of-cycles-delay-between-sdcard-peri.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-3.10/0037-Allow-the-number-of-cycles-delay-between-sdcard-peri.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-3.10/0037-Allow-the-number-of-cycles-delay-between-sdcard-peri.patch b/target/linux/brcm2708/patches-3.10/0037-Allow-the-number-of-cycles-delay-between-sdcard-peri.patch new file mode 100644 index 0000000000..8961a23083 --- /dev/null +++ b/target/linux/brcm2708/patches-3.10/0037-Allow-the-number-of-cycles-delay-between-sdcard-peri.patch @@ -0,0 +1,39 @@ +From addefb978a42b1699979ef8ecef08a01977dfd7d Mon Sep 17 00:00:00 2001 +From: popcornmix <popcornmix@gmail.com> +Date: Wed, 3 Oct 2012 21:31:48 +0100 +Subject: [PATCH 037/174] 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(-) + +--- 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(str + /* 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>"); |