From mboxrd@z Thu Jan 1 00:00:00 1970 From: anarsoul@gmail.com (Vasily Khoruzhick) Date: Sat, 20 Mar 2010 20:20:08 +0200 Subject: [PATCH 3/4] s3c244x: configure GPG13-15 as input before suspend In-Reply-To: <1269109209-26237-1-git-send-email-anarsoul@gmail.com> References: <1269109209-26237-1-git-send-email-anarsoul@gmail.com> Message-ID: <1269109209-26237-4-git-send-email-anarsoul@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- arch/arm/mach-s3c2440/s3c244x.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-s3c2440/s3c244x.c b/arch/arm/mach-s3c2440/s3c244x.c index 5e4a97e..b100e92 100644 --- a/arch/arm/mach-s3c2440/s3c244x.c +++ b/arch/arm/mach-s3c2440/s3c244x.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include @@ -146,6 +147,17 @@ static struct sleep_save s3c244x_sleep[] = { static int s3c244x_suspend(struct sys_device *dev, pm_message_t state) { s3c_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep)); +#ifdef CONFIG_S3C_DEV_NAND + /* 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 + */ + s3c2410_gpio_cfgpin(S3C2410_GPG(15), S3C2410_GPIO_INPUT); + s3c2410_gpio_cfgpin(S3C2410_GPG(14), S3C2410_GPIO_INPUT); + s3c2410_gpio_cfgpin(S3C2410_GPG(13), S3C2410_GPIO_INPUT); +#endif return 0; } -- 1.7.0.2