diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-24 10:25:57 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-02-09 16:34:13 +0100 |
| commit | 49e01e3fb6efe1b0abfa2d5675f88f07989d621f (patch) | |
| tree | 52baf603503e37727e58ae1a3e8178e09fd1a423 /arch/arm/mach-sa1100/assabet.c | |
| parent | ARM: sa11x0: assabet: avoid glitching GPIOs when setting outputs (diff) | |
| download | linux-49e01e3fb6efe1b0abfa2d5675f88f07989d621f.tar.xz linux-49e01e3fb6efe1b0abfa2d5675f88f07989d621f.zip | |
ARM: sa11x0: assabet: ensure that GPIO27 is driven
GPIO27 is just connected to a CPLD input without any pull-ups or pull-
downs. If GPIO27 is left as an input, it will float around mid-supply,
which for CMOS inputs is the worst place for a pin to be. Ensure that
this pin is driven.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-sa1100/assabet.c')
| -rw-r--r-- | arch/arm/mach-sa1100/assabet.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c index 6356896587bf..e3805d4c052a 100644 --- a/arch/arm/mach-sa1100/assabet.c +++ b/arch/arm/mach-sa1100/assabet.c @@ -215,6 +215,14 @@ static void __init assabet_init(void) GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM; /* + * Also set GPIO27 as an output; this is used to clock UART3 + * via the FPGA and as otherwise has no pullups or pulldowns, + * so stop it floating. + */ + GPCR = GPIO_GPIO27; + GPDR |= GPIO_GPIO27; + + /* * Set up registers for sleep mode. */ PWER = PWER_GPIO0; |