From 192ff91fc84e067a3babfddb96114a51c939548e Mon Sep 17 00:00:00 2001
From: Vasily Khoruzhick <anarsoul@gmail.com>
Date: Tue, 11 May 2010 09:55:11 +0300
Subject: [PATCH] ARM: RX1950: configure GPG13-15 as input before suspend
According to datasheet GPG13-15 must be configured as input in NAND
boot mode, otherwise device will not be able to wake up
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
---
arch/arm/mach-s3c2410/pm.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/arm/mach-s3c2410/pm.c b/arch/arm/mach-s3c2410/pm.c
index 6a61486ca755..725636fc4dc3 100644
--- a/arch/arm/mach-s3c2410/pm.c
+++ b/arch/arm/mach-s3c2410/pm.c
@@ -79,6 +79,17 @@ static void s3c2410_pm_prepare(void)
if ( machine_is_aml_m5900() )
s3c2410_gpio_setpin(S3C2410_GPF(2), 1);
+ if (machine_is_rx1950()) {
+ /* According to S3C2442 user's manual, page 7-17,
+ * when the system is operating in NAND boot mode,
+ * the hardware pin configuration - EINT[23:21] –
+ * must be set as input for starting up after
+ * wakeup from sleep mode
+ */
+ s3c_gpio_cfgpin(S3C2410_GPG(13), S3C2410_GPIO_INPUT);
+ s3c_gpio_cfgpin(S3C2410_GPG(14), S3C2410_GPIO_INPUT);
+ s3c_gpio_cfgpin(S3C2410_GPG(15), S3C2410_GPIO_INPUT);
+ }
}
static int s3c2410_pm_resume(struct sys_device *dev)