From: Chao Xie <chao.xie@marvell.com>
Date: Fri, 22 Feb 2013 00:45:17 +0000 (-0800)
Subject: drivers/rtc/rtc-sa1100.c: move clock enable/disable to probe/remove
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0cc0c38e91392d2da769c9831739df43787d99e3;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

drivers/rtc/rtc-sa1100.c: move clock enable/disable to probe/remove

The original sa1100_rtc_open/sa1100_rtc_release will be called when the
/dev/rtc0 is opened or closed.  In fact, these two functions will
enable/disable the clock.  Disabling clock will make rtc not work.  So
only enable/disable clock when probe/remove the device.

Signed-off-by: Chao Xie <chao.xie@marvell.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Leo Song <liangs@marvell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index df9180e80e3a..5ec5036df0bc 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -108,9 +108,6 @@ static int sa1100_rtc_open(struct device *dev)
 	struct rtc_device *rtc = info->rtc;
 	int ret;
 
-	ret = clk_prepare_enable(info->clk);
-	if (ret)
-		goto fail_clk;
 	ret = request_irq(info->irq_1hz, sa1100_rtc_interrupt, 0, "rtc 1Hz", dev);
 	if (ret) {
 		dev_err(dev, "IRQ %d already in use.\n", info->irq_1hz);
@@ -130,7 +127,6 @@ static int sa1100_rtc_open(struct device *dev)
 	free_irq(info->irq_1hz, dev);
  fail_ui:
 	clk_disable_unprepare(info->clk);
- fail_clk:
 	return ret;
 }
 
@@ -144,7 +140,6 @@ static void sa1100_rtc_release(struct device *dev)
 
 	free_irq(info->irq_alarm, dev);
 	free_irq(info->irq_1hz, dev);
-	clk_disable_unprepare(info->clk);
 }
 
 static int sa1100_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
@@ -253,6 +248,9 @@ static int sa1100_rtc_probe(struct platform_device *pdev)
 	spin_lock_init(&info->lock);
 	platform_set_drvdata(pdev, info);
 
+	ret = clk_prepare_enable(info->clk);
+	if (ret)
+		goto err_enable_clk;
 	/*
 	 * According to the manual we should be able to let RTTR be zero
 	 * and then a default diviser for a 32.768KHz clock is used.
@@ -305,6 +303,8 @@ static int sa1100_rtc_probe(struct platform_device *pdev)
 
 	return 0;
 err_dev:
+	clk_disable_unprepare(info->clk);
+err_enable_clk:
 	platform_set_drvdata(pdev, NULL);
 	clk_put(info->clk);
 err_clk:
@@ -318,6 +318,7 @@ static int sa1100_rtc_remove(struct platform_device *pdev)
 
 	if (info) {
 		rtc_device_unregister(info->rtc);
+		clk_disable_unprepare(info->clk);
 		clk_put(info->clk);
 		platform_set_drvdata(pdev, NULL);
 		kfree(info);