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openwrt-xburst/target/linux/brcm63xx/patches-2.6.33/210-init_gpio_out_low_high_current_value_at_boot.patch
florian 4d9258acb3 [brcm63xx] add support for 2.6.33
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19921 3c298f89-4303-0410-b956-a3cf2f4a3e73
2010-02-28 21:24:34 +00:00

20 lines
620 B
Diff

To avoid glitch during gpio initialisation, fetch gpio output
registers values left by bootloader.
Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
---
arch/mips/bcm63xx/gpio.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
--- a/arch/mips/bcm63xx/gpio.c
+++ b/arch/mips/bcm63xx/gpio.c
@@ -125,6 +125,8 @@ static struct gpio_chip bcm63xx_gpio_chi
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);