target/linux/brcm63xx/patches-2.6.32/210-init_gpio_out_low_high_current_value_at_boot.patch

   1 To avoid glitch during gpio initialisation, fetch gpio output
   2 registers values left by bootloader.
   3
   4 Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
   5 ---
   6  arch/mips/bcm63xx/gpio.c |    2 ++
   7  1 files changed, 2 insertions(+), 0 deletions(-)
   8
   9 diff --git a/arch/mips/bcm63xx/gpio.c b/arch/mips/bcm63xx/gpio.c
  10 index 3725345..315bc7f 100644
  11 --- a/arch/mips/bcm63xx/gpio.c
  12 +++ b/arch/mips/bcm63xx/gpio.c
  13 @@ -125,6 +125,8 @@ static struct gpio_chip bcm63xx_gpio_chip = {
  14
  15  int __init bcm63xx_gpio_init(void)
  16  {
  17 +       gpio_out_low = bcm_gpio_readl(GPIO_DATA_LO_REG);
  18 +       gpio_out_high = bcm_gpio_readl(GPIO_DATA_HI_REG);
  19         bcm63xx_gpio_chip.ngpio = bcm63xx_gpio_count();
  20         pr_info("registering %d GPIOs\n", bcm63xx_gpio_chip.ngpio);
  21
  22 --
  23 1.6.3.3
  24
  25