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