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List:       linux-mips
Subject:    [PATCH 7/7] MIPS: bcm63xx: initialize gpio_out_low & out_high to current value at boot.
From:       Maxime Bizon <mbizon () freebox ! fr>
Date:       2010-01-30 17:34:58
Message-ID: 1264872898-28149-8-git-send-email-mbizon () freebox ! fr
[Download RAW message or body]

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(-)

diff --git a/arch/mips/bcm63xx/gpio.c b/arch/mips/bcm63xx/gpio.c
index 3725345..315bc7f 100644
--- a/arch/mips/bcm63xx/gpio.c
+++ b/arch/mips/bcm63xx/gpio.c
@@ -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);
 
-- 
1.6.3.3


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