From 4f592e6d1a6711b2ef140b5c76342dbe2506c8cb Mon Sep 17 00:00:00 2001 From: Russell King Date: Tue, 24 Jan 2012 09:23:19 +0000 Subject: [PATCH] ARM: sa11x0: assabet: avoid glitching GPIOs when setting outputs Avoid glitching the GPIO signals during initialization, which can have undesirable effects. Ensure that the desired pin state is set before we change the GPIO pin direction to be an output. Signed-off-by: Russell King --- arch/arm/mach-sa1100/assabet.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c index 3a3282e..6356896 100644 --- a/arch/arm/mach-sa1100/assabet.c +++ b/arch/arm/mach-sa1100/assabet.c @@ -202,8 +202,8 @@ static void __init assabet_init(void) /* * Ensure that the power supply is in "high power" mode. */ - GPDR |= GPIO_GPIO16; GPSR = GPIO_GPIO16; + GPDR |= GPIO_GPIO16; /* * Ensure that these pins are set as outputs and are driving @@ -211,8 +211,8 @@ static void __init assabet_init(void) * the WS latch in the CPLD, and we don't float causing * excessive power drain. --rmk */ - GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM; GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM; + GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM; /* * Set up registers for sleep mode. -- 2.7.4