Patchwork ata: pata_arasan: Initialize cf clock to 166MHz

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Submitter viresh kumar
Date Nov. 8, 2012, 3:09 p.m.
Message ID <382d2087350ff0955ba14f125294ace4ed28382b.1352387366.git.viresh.kumar@linaro.org>
Download mbox | patch
Permalink /patch/197848/
State Not Applicable
Delegated to: David Miller
Headers show

Comments

viresh kumar - Nov. 8, 2012, 3:09 p.m.
From: Vipul Kumar Samar <vipulkumar.samar@st.com>

PATA arasan driver expects the clock to be set to 166 MHz for proper functioning.
This patch sets clk to 166 MHz in probe.

Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@st.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/ata/pata_arasan_cf.c | 6 ++++++
 1 file changed, 6 insertions(+)
Jeff Garzik - Nov. 16, 2012, 4:40 a.m.
On 11/08/2012 10:09 AM, Viresh Kumar wrote:
> From: Vipul Kumar Samar <vipulkumar.samar@st.com>
>
> PATA arasan driver expects the clock to be set to 166 MHz for proper functioning.
> This patch sets clk to 166 MHz in probe.
>
> Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@st.com>
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
>   drivers/ata/pata_arasan_cf.c | 6 ++++++
>   1 file changed, 6 insertions(+)

applied



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Patch

diff --git a/drivers/ata/pata_arasan_cf.c b/drivers/ata/pata_arasan_cf.c
index 26201eb..71111f2 100644
--- a/drivers/ata/pata_arasan_cf.c
+++ b/drivers/ata/pata_arasan_cf.c
@@ -317,6 +317,12 @@  static int cf_init(struct arasan_cf_dev *acdev)
 		return ret;
 	}
 
+	ret = clk_set_rate(acdev->clk, 166000000);
+	if (ret) {
+		dev_warn(acdev->host->dev, "clock set rate failed");
+		return ret;
+	}
+
 	spin_lock_irqsave(&acdev->host->lock, flags);
 	/* configure CF interface clock */
 	writel((pdata->cf_if_clk <= CF_IF_CLK_200M) ? pdata->cf_if_clk :