From: Viresh Kumar <viresh.kumar@st.com>
Date: Mon, 12 Mar 2012 04:22:17 +0000 (+0530)
Subject: watchdog: sp805_wdt: Add clk_{un}prepare support
X-Git-Tag: v3.5-rc1~39^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d9df0ef1eb9e1048f0ab4a6e93c85f60c5594c2f;p=platform%2Fupstream%2Fkernel-adaptation-pc.git

watchdog: sp805_wdt: Add clk_{un}prepare support

clk_{un}prepare() routines are required for required on some platforms to run
part of clk enable/disable() routines from contexts that can schedule.

This patch adds support for these routines in sp805 driver.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
---

diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
index 18d4bcf..afcd136 100644
--- a/drivers/watchdog/sp805_wdt.c
+++ b/drivers/watchdog/sp805_wdt.c
@@ -130,9 +130,16 @@ static int wdt_config(struct watchdog_device *wdd, bool ping)
 	int ret;
 
 	if (!ping) {
+		ret = clk_prepare(wdt->clk);
+		if (ret) {
+			dev_err(&wdt->adev->dev, "clock prepare fail");
+			return ret;
+		}
+
 		ret = clk_enable(wdt->clk);
 		if (ret) {
 			dev_err(&wdt->adev->dev, "clock enable fail");
+			clk_unprepare(wdt->clk);
 			return ret;
 		}
 	}
@@ -184,6 +191,7 @@ static int wdt_disable(struct watchdog_device *wdd)
 	spin_unlock(&wdt->lock);
 
 	clk_disable(wdt->clk);
+	clk_unprepare(wdt->clk);
 
 	return 0;
 }