X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=arch%2Farm%2Fplat-samsung%2Fpwm.c;h=2eeb49fa056d6413c1963abc6113fa0eff76caf8;hp=ef019f27b67d5822afc8c3e4fbdac17220eebbd6;hb=5a0e3ad6af8660be21ca98a971cd00f331318c05;hpb=722874465e3cd3268387b96e02220f84b35a8d98

diff --git a/arch/arm/plat-samsung/pwm.c b/arch/arm/plat-samsung/pwm.c
index ef019f27b67d..2eeb49fa056d 100644
--- a/arch/arm/plat-samsung/pwm.c
+++ b/arch/arm/plat-samsung/pwm.c
@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/clk.h>
 #include <linux/io.h>
@@ -379,6 +380,39 @@ static int __devexit s3c_pwm_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int s3c_pwm_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct pwm_device *pwm = platform_get_drvdata(pdev);
+
+	/* No one preserve these values during suspend so reset them
+	 * Otherwise driver leaves PWM unconfigured if same values
+	 * passed to pwm_config
+	 */
+	pwm->period_ns = 0;
+	pwm->duty_ns = 0;
+
+	return 0;
+}
+
+static int s3c_pwm_resume(struct platform_device *pdev)
+{
+	struct pwm_device *pwm = platform_get_drvdata(pdev);
+	unsigned long tcon;
+
+	/* Restore invertion */
+	tcon = __raw_readl(S3C2410_TCON);
+	tcon |= pwm_tcon_invert(pwm);
+	__raw_writel(tcon, S3C2410_TCON);
+
+	return 0;
+}
+
+#else
+#define s3c_pwm_suspend NULL
+#define s3c_pwm_resume NULL
+#endif
+
 static struct platform_driver s3c_pwm_driver = {
 	.driver		= {
 		.name	= "s3c24xx-pwm",
@@ -386,6 +420,8 @@ static struct platform_driver s3c_pwm_driver = {
 	},
 	.probe		= s3c_pwm_probe,
 	.remove		= __devexit_p(s3c_pwm_remove),
+	.suspend	= s3c_pwm_suspend,
+	.resume		= s3c_pwm_resume,
 };
 
 static int __init pwm_init(void)