>From 30b712a99e25cb4e90807d20d2524fb74963e25e Mon Sep 17 00:00:00 2001
From: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx>
Date: Thu, 11 Nov 2010 15:49:11 +0800
Subject: [PATCH 3/3] mmc: implemented get_tmclk callback for sdhci host
get_tmclk callback will be used for calculating a suitable
max_discard_sectors value
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 79fcca2..1575bfa 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1311,11 +1311,28 @@ out:
spin_unlock_irqrestore(&host->lock, flags);
}
+/*
+ * get the host controller timeout clock which will
+ * be used to calculate a suitable max_discard_sectors
+ * value for mmc queue
+ * */
+static unsigned int sdhci_get_tmclk(struct mmc_host *mmc)
+{
+ struct sdhci_host *host;
+ host = mmc_priv(mmc);
+
+ if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)
+ host->timeout_clk = host->clock / 1000;
+
+ return host->timeout_clk;
+}
+
static const struct mmc_host_ops sdhci_ops = {
.request = sdhci_request,
.set_ios = sdhci_set_ios,
.get_ro = sdhci_get_ro,
.enable_sdio_irq = sdhci_enable_sdio_irq,
+ .get_tmclk = sdhci_get_tmclk,
};
/*****************************************************************************\
--
1.6.6.1
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