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authorTero Kristo <tero.kristo@nokia.com>2008-12-22 13:27:12 +0100
committerKevin Hilman <khilman@deeprootsystems.com>2010-05-12 18:39:16 +0200
commita118b5f3391fc60e1619a79f8ceb070bb7b39b2d (patch)
treed8c7b3aadf2e6b92cabd3651f181b2196a76669e /arch/arm/plat-omap/gpio.c
parentLinux 2.6.34-rc7 (diff)
downloadlinux-a118b5f3391fc60e1619a79f8ceb070bb7b39b2d.tar.xz
linux-a118b5f3391fc60e1619a79f8ceb070bb7b39b2d.zip
OMAP3: GPIO fixes for off-mode
Off mode is now using the omap2 retention fix code for scanning GPIOs during off-mode transitions. All the *non_wakeup_gpios variables are now used for off-mode transition tracking on OMAP3. This patch fixes cases where GPIO state changes are missed during off-mode. Signed-off-by: Tero Kristo <tero.kristo@nokia.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/plat-omap/gpio.c')
-rw-r--r--arch/arm/plat-omap/gpio.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 45a225d09125..6216f4f09e82 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -731,7 +731,9 @@ static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
__raw_writel(1 << gpio, bank->base
+ OMAP24XX_GPIO_CLEARWKUENA);
}
- } else {
+ }
+ /* This part needs to be executed always for OMAP34xx */
+ if (cpu_is_omap34xx() || (bank->non_wakeup_gpios & gpio_bit)) {
if (trigger != 0)
bank->enabled_non_wakeup_gpios |= gpio_bit;
else
@@ -1845,7 +1847,8 @@ static int __init _omap_gpio_init(void)
__raw_writel(0, bank->base +
OMAP24XX_GPIO_CTRL);
}
- if (i < ARRAY_SIZE(non_wakeup_gpios))
+ if (cpu_is_omap24xx() &&
+ i < ARRAY_SIZE(non_wakeup_gpios))
bank->non_wakeup_gpios = non_wakeup_gpios[i];
gpio_count = 32;
}
@@ -2031,10 +2034,13 @@ static int workaround_enabled;
void omap2_gpio_prepare_for_retention(void)
{
int i, c = 0;
+ int min = 0;
+ if (cpu_is_omap34xx())
+ min = 1;
/* Remove triggering for all non-wakeup GPIOs. Otherwise spurious
* IRQs will be generated. See OMAP2420 Errata item 1.101. */
- for (i = 0; i < gpio_bank_count; i++) {
+ for (i = min; i < gpio_bank_count; i++) {
struct gpio_bank *bank = &gpio_bank[i];
u32 l1, l2;
@@ -2088,10 +2094,13 @@ void omap2_gpio_prepare_for_retention(void)
void omap2_gpio_resume_after_retention(void)
{
int i;
+ int min = 0;
if (!workaround_enabled)
return;
- for (i = 0; i < gpio_bank_count; i++) {
+ if (cpu_is_omap34xx())
+ min = 1;
+ for (i = min; i < gpio_bank_count; i++) {
struct gpio_bank *bank = &gpio_bank[i];
u32 l, gen, gen0, gen1;
@@ -2119,7 +2128,7 @@ void omap2_gpio_resume_after_retention(void)
* horribly racy, but it's the best we can do to work around
* this silicon bug. */
l ^= bank->saved_datain;
- l &= bank->non_wakeup_gpios;
+ l &= bank->enabled_non_wakeup_gpios;
/*
* No need to generate IRQs for the rising edge for gpio IRQs