diff options
| author | Gabor Juhos <juhosg@openwrt.org> | 2007-12-12 12:42:40 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2007-12-12 12:42:40 +0000 |
| commit | fa107286856fbe93a8cf1a5bcfd32667fbd27089 (patch) | |
| tree | b942a0d4c53b8c07e90a4579329fedcba1ad3646 | |
| parent | ed7a8ab03690da1a5e8f4bc0a37b47791636a352 (diff) | |
| download | upstream-fa107286856fbe93a8cf1a5bcfd32667fbd27089.tar.gz upstream-fa107286856fbe93a8cf1a5bcfd32667fbd27089.tar.bz2 upstream-fa107286856fbe93a8cf1a5bcfd32667fbd27089.zip | |
use a shadow value for the write-only GPIO_CONF2 register
SVN-Revision: 9715
| -rw-r--r-- | target/linux/adm5120/files/arch/mips/adm5120/gpio.c | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/target/linux/adm5120/files/arch/mips/adm5120/gpio.c b/target/linux/adm5120/files/arch/mips/adm5120/gpio.c index a9e6e6bdfb..01d5a87c4e 100644 --- a/target/linux/adm5120/files/arch/mips/adm5120/gpio.c +++ b/target/linux/adm5120/files/arch/mips/adm5120/gpio.c @@ -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; |