From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiri.Pinkava@vscht.cz (=?ISO-8859-2?Q?Ji=F8=ED_Pinkava?=) Date: Mon, 4 Oct 2010 02:25:41 +0200 Subject: [PATCH 2/6] n35: Update GPIO documentation for Acer n35 In-Reply-To: <4CA91EDA.80009@vscht.cz> References: <4CA91E6F.3010704@vscht.cz> <4CA91EDA.80009@vscht.cz> Message-ID: <4CA91F05.3040602@vscht.cz> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Signed-off-by: Jiri Pinkava --- arch/arm/mach-s3c2410/mach-n30.c | 12 +++++------- 1 files changed, 5 insertions(+), 7 deletions(-) diff --git a/arch/arm/mach-s3c2410/mach-n30.c b/arch/arm/mach-s3c2410/mach-n30.c index e732619..abbb9b5 100644 --- a/arch/arm/mach-s3c2410/mach-n30.c +++ b/arch/arm/mach-s3c2410/mach-n30.c @@ -410,13 +410,11 @@ static struct s3c2410_platform_i2c __initdata n30_i2ccfg = { static void __init n30_hwinit(void) { /* GPA0-11 special functions -- unknown what they do - * GPA12 N30 special function -- unknown what it does - * N35/PiN output -- unknown what it does - * - * A12 is nGCS1 on the N30 and an output on the N35/PiN. I - * don't think it does anything useful on the N30, so I ought - * to make it an output there too since it always driven to 0 - * as far as I can tell. */ + * GPA12 N30 special function (nGCS1) -- unknown what it does + * PiN output -- unknown function + * N35 output -- turn on/off red led, 0 = normal operation, + * 1 = turn off red led at all. Note: GPD9 must be input or + * output with value set to 1 before setting GPA12 to 0. */ if (machine_is_n30()) __raw_writel(0x007fffff, S3C2410_GPACON); if (machine_is_n35()) -- 1.7.3.1