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ARM: 6353/1: nomadik-gpio: add SLPM register handing for DB8500v2

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The SLPM register enables/disables wakeup detection on DB8500v2.

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Rabin Vincent 2010-09-02 11:28:05 +01:00 committed by Russell King
parent e3726fcf26
commit 7e3f7e59cc
3 changed files with 33 additions and 4 deletions
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30
arch/arm/plat-nomadik/gpio.c
View file

@ -118,8 +118,8 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
[3] /* illegal */ = "??"
};
static const char *slpmnames[] = {
[NMK_GPIO_SLPM_INPUT] = "input",
[NMK_GPIO_SLPM_NOCHANGE] = "no-change",
[NMK_GPIO_SLPM_INPUT] = "input/wakeup",
[NMK_GPIO_SLPM_NOCHANGE] = "no-change/no-wakeup",
};
int pin = PIN_NUM(cfg);
@ -200,6 +200,10 @@ EXPORT_SYMBOL(nmk_config_pins);
* changed to an input (with pullup/down enabled) in sleep and deep sleep. If
* @mode is NMK_GPIO_SLPM_NOCHANGE, the pin remains in the state it was
* configured even when in sleep and deep sleep.
*
* On DB8500v2 onwards, this setting loses the previous meaning and instead
* indicates if wakeup detection is enabled on the pin. Note that
* enable_irq_wake() will automatically enable wakeup detection.
*/
int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode)
{
@ -367,7 +371,27 @@ static void nmk_gpio_irq_unmask(unsigned int irq)
static int nmk_gpio_irq_set_wake(unsigned int irq, unsigned int on)
{
return nmk_gpio_irq_modify(irq, WAKE, on);
struct nmk_gpio_chip *nmk_chip;
unsigned long flags;
int gpio;
gpio = NOMADIK_IRQ_TO_GPIO(irq);
nmk_chip = get_irq_chip_data(irq);
if (!nmk_chip)
return -EINVAL;
spin_lock_irqsave(&nmk_chip->lock, flags);
#ifdef CONFIG_ARCH_U8500
if (cpu_is_u8500v2()) {
__nmk_gpio_set_slpm(nmk_chip, gpio,
on ? NMK_GPIO_SLPM_WAKEUP_ENABLE
: NMK_GPIO_SLPM_WAKEUP_DISABLE);
}
#endif
__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on);
spin_unlock_irqrestore(&nmk_chip->lock, flags);
return 0;
}
static int nmk_gpio_irq_set_type(unsigned int irq, unsigned int type)

2
arch/arm/plat-nomadik/include/plat/gpio.h
View file

@ -65,7 +65,9 @@ enum nmk_gpio_pull {
/* Sleep mode */
enum nmk_gpio_slpm {
NMK_GPIO_SLPM_INPUT,
NMK_GPIO_SLPM_WAKEUP_ENABLE = NMK_GPIO_SLPM_INPUT,
NMK_GPIO_SLPM_NOCHANGE,
NMK_GPIO_SLPM_WAKEUP_DISABLE = NMK_GPIO_SLPM_NOCHANGE,
};
extern int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode);

5
arch/arm/plat-nomadik/include/plat/pincfg.h
View file

@ -24,7 +24,7 @@
*
* PIN_CFG_DEFAULT - default config (0):
* pull up/down = disabled
* sleep mode = input
* sleep mode = input/wakeup
*
* PIN_CFG - default config with alternate function
* PIN_CFG_PULL - default config with alternate function and pull up/down
@ -55,6 +55,9 @@ typedef unsigned long pin_cfg_t;
#define PIN_SLPM(x) (((x) & PIN_SLPM_MASK) >> PIN_SLPM_SHIFT)
#define PIN_SLPM_INPUT (NMK_GPIO_SLPM_INPUT << PIN_SLPM_SHIFT)
#define PIN_SLPM_NOCHANGE (NMK_GPIO_SLPM_NOCHANGE << PIN_SLPM_SHIFT)
/* These two replace the above in DB8500v2+ */
#define PIN_SLPM_WAKEUP_ENABLE (NMK_GPIO_SLPM_WAKEUP_ENABLE << PIN_SLPM_SHIFT)
#define PIN_SLPM_WAKEUP_DISABLE (NMK_GPIO_SLPM_WAKEUP_DISABLE << PIN_SLPM_SHIFT)
#define PIN_CFG_DEFAULT (PIN_PULL_NONE | PIN_SLPM_INPUT)