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MIPS: BCM63xx: Initialize gpio_out_low & out_high to current value at boot. 

To avoid a glitch during GPIO initialisation read GPIO output register
values left by the firmware.

Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/903/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Maxime Bizon 2010-01-30 18:34:58 +01:00 committed by Ralf Baechle
parent e23a90eb73
commit 9538ca636f
1 changed files with 2 additions and 0 deletions
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2
arch/mips/bcm63xx/gpio.c
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@ -125,6 +125,8 @@ static struct gpio_chip bcm63xx_gpio_chip = {
int __init bcm63xx_gpio_init(void)
{
gpio_out_low = bcm_gpio_readl(GPIO_DATA_LO_REG);
gpio_out_high = bcm_gpio_readl(GPIO_DATA_HI_REG);
bcm63xx_gpio_chip.ngpio = bcm63xx_gpio_count();
pr_info("registering %d GPIOs\n", bcm63xx_gpio_chip.ngpio);