[PATCH 2/6] n35: Update GPIO documentation for Acer n35

[Jiri.Pinkava at vscht.cz]

More precise and detailed information about GPA12 on Acer n35.


Signed-off-by: Jiri Pinkava <jiri.pinkava at vscht.cz>
---
 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