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[adm5120] use a shadow value for the write-only GPIO_CONF2 register 

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9715 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Gabor Juhos 2007-12-12 12:42:40 +00:00
parent c4f8cd6b69
commit 94b114314e
1 changed files with 10 additions and 16 deletions
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26
target/linux/adm5120/files/arch/mips/adm5120/gpio.c
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@ -74,6 +74,8 @@ static struct led_desc led_table[15] = {
static struct adm5120_gpio_line adm5120_gpio_map[ADM5120_GPIO_COUNT];
static u32 gpio_conf2;
/*-------------------------------------------------------------------------*/
static inline int gpio_is_invalid(unsigned gpio)
@ -340,11 +342,8 @@ EXPORT_SYMBOL(adm5120_irq_to_gpio);
void __init adm5120_gpio_csx0_enable(void)
{
u32 t;
t = SW_READ_REG(GPIO_CONF2);
t |= GPIO_CONF2_CSX0;
SW_WRITE_REG(GPIO_CONF2, t);
gpio_conf2 |= GPIO_CONF2_CSX0;
SW_WRITE_REG(GPIO_CONF2, gpio_conf2);
adm5120_gpio_map[ADM5120_GPIO_PIN1].flags &= ~GPIO_FLAG_VALID;
adm5120_gpio_map[ADM5120_GPIO_PIN2].irq = ADM5120_IRQ_GPIO2;
@ -352,11 +351,8 @@ void __init adm5120_gpio_csx0_enable(void)
void __init adm5120_gpio_csx1_enable(void)
{
u32 t;
t = SW_READ_REG(GPIO_CONF2);
t |= GPIO_CONF2_CSX1;
SW_WRITE_REG(GPIO_CONF2, t);
gpio_conf2 |= GPIO_CONF2_CSX1;
SW_WRITE_REG(GPIO_CONF2, gpio_conf2);
adm5120_gpio_map[ADM5120_GPIO_PIN3].flags &= ~GPIO_FLAG_VALID;
if (adm5120_package_bga())
@ -365,11 +361,8 @@ void __init adm5120_gpio_csx1_enable(void)
void __init adm5120_gpio_ew_enable(void)
{
u32 t;
t = SW_READ_REG(GPIO_CONF2);
t |= GPIO_CONF2_EW;
SW_WRITE_REG(GPIO_CONF2, t);
gpio_conf2 |= GPIO_CONF2_EW;
SW_WRITE_REG(GPIO_CONF2, gpio_conf2);
adm5120_gpio_map[ADM5120_GPIO_PIN0].flags &= ~GPIO_FLAG_VALID;
}
@ -378,7 +371,8 @@ void __init adm5120_gpio_init(void)
{
int i;
SW_WRITE_REG(GPIO_CONF2, 0);
gpio_conf2 = 0;
SW_WRITE_REG(GPIO_CONF2, gpio_conf2);
for (i = 0; i < ADM5120_GPIO_COUNT; i++)
adm5120_gpio_map[i].flags = GPIO_FLAG_VALID;