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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-24 10:23:19 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-02-09 16:34:12 +0100 |
| commit | 4f592e6d1a6711b2ef140b5c76342dbe2506c8cb (patch) | |
| tree | 5e650d8f630797d4740383e72ac0c119612334de /arch/arm/mach-sa1100 | |
| parent | ARM: sa11x0: assabet: deassert QMUTE to codec while codec is unpowered (diff) | |
| download | linux-4f592e6d1a6711b2ef140b5c76342dbe2506c8cb.tar.xz linux-4f592e6d1a6711b2ef140b5c76342dbe2506c8cb.zip | |
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 <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-sa1100')
| -rw-r--r-- | arch/arm/mach-sa1100/assabet.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c index 3a3282e08a70..6356896587bf 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. |