linux-kernel - [PATCH 1/2] mmc: sdhci-spear: Initialize sdhci clk to 50 MHz

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Message-Id: <fd576f198e6f3dc4031bb905247ed9c0a0b66a20.1352387305.git.viresh.kumar@linaro.org>
Date:	Thu,  8 Nov 2012 20:39:09 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	cjb@...top.org
Cc:	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	spear-devel@...t.st.com,
	Vipul Kumar Samar <vipulkumar.samar@...com>,
	Viresh Kumar <viresh.kumar@...aro.org>
Subject: [PATCH 1/2] mmc: sdhci-spear: Initialize sdhci clk to 50 MHz

From: Vipul Kumar Samar <vipulkumar.samar@...com>

SPEAr sdhci driver expects the clock to be set to 50 MHz for proper functioning.
This patch sets clk to 50 MHz in probe.

Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@...com>
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 drivers/mmc/host/sdhci-spear.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mmc/host/sdhci-spear.c b/drivers/mmc/host/sdhci-spear.c
index 6be89c0..fea8bf9 100644
--- a/drivers/mmc/host/sdhci-spear.c
+++ b/drivers/mmc/host/sdhci-spear.c
@@ -146,6 +146,11 @@ static int __devinit sdhci_probe(struct platform_device *pdev)
 		goto put_clk;
 	}
 
+	ret = clk_set_rate(sdhci->clk, 50000000);
+	if (ret)
+		dev_dbg(&pdev->dev, "Error setting desired clk, clk=%lu\n",
+				clk_get_rate(sdhci->clk));
+
 	if (np) {
 		sdhci->data = sdhci_probe_config_dt(pdev);
 		if (IS_ERR(sdhci->data)) {
-- 
1.7.12.rc2.18.g61b472e

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