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ARM: sa11x0: assabet: ensure that GPIO27 is driven

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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>
This commit is contained in:
Russell King 2012-01-24 09:25:57 +00:00
parent 4f592e6d1a
commit 49e01e3fb6
1 changed files with 8 additions and 0 deletions
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8
arch/arm/mach-sa1100/assabet.c
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@ -214,6 +214,14 @@ static void __init assabet_init(void)
GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
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.
*/