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[ARM] tegra: gpio: Add suspend and wake support

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Includes checkpatch fixes and TEGRA_NR_GPIOS changes from
Mike Rapoport <mike@compulab.co.il>

Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross 2010-04-07 12:59:42 -07:00
parent c5f04b8d10
commit 2e47b8b3c2
2 changed files with 95 additions and 13 deletions
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104
arch/arm/mach-tegra/gpio.c
View File

@ -19,6 +19,7 @@
#include <linux/init.h> #include <linux/init.h>
#include <linux/irq.h> #include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/gpio.h> #include <linux/gpio.h>
@ -60,6 +61,13 @@ struct tegra_gpio_bank {
int bank; int bank;
int irq; int irq;
spinlock_t lvl_lock[4]; spinlock_t lvl_lock[4];
#ifdef CONFIG_PM
u32 cnf[4];
u32 out[4];
u32 oe[4];
u32 int_enb[4];
u32 int_lvl[4];
#endif
}; };
@ -131,7 +139,7 @@ static struct gpio_chip tegra_gpio_chip = {
.direction_output = tegra_gpio_direction_output, .direction_output = tegra_gpio_direction_output,
.set = tegra_gpio_set, .set = tegra_gpio_set,
.base = 0, .base = 0,
.ngpio = ARCH_NR_GPIOS, .ngpio = TEGRA_NR_GPIOS,
}; };
static void tegra_gpio_irq_ack(unsigned int irq) static void tegra_gpio_irq_ack(unsigned int irq)
@ -244,6 +252,76 @@ static void tegra_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
} }
#ifdef CONFIG_PM
void tegra_gpio_resume(void)
{
unsigned long flags;
int b, p, i;
local_irq_save(flags);
for (b = 0; b < ARRAY_SIZE(tegra_gpio_banks); b++) {
struct tegra_gpio_bank *bank = &tegra_gpio_banks[b];
for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
unsigned int gpio = (b<<5) | (p<<3);
__raw_writel(bank->cnf[p], GPIO_CNF(gpio));
__raw_writel(bank->out[p], GPIO_OUT(gpio));
__raw_writel(bank->oe[p], GPIO_OE(gpio));
__raw_writel(bank->int_lvl[p], GPIO_INT_LVL(gpio));
__raw_writel(bank->int_enb[p], GPIO_INT_ENB(gpio));
}
}
local_irq_restore(flags);
for (i = INT_GPIO_BASE; i < (INT_GPIO_BASE + TEGRA_NR_GPIOS); i++) {
struct irq_desc *desc = irq_to_desc(i);
if (!desc || (desc->status & IRQ_WAKEUP))
continue;
enable_irq(i);
}
}
void tegra_gpio_suspend(void)
{
unsigned long flags;
int b, p, i;
for (i = INT_GPIO_BASE; i < (INT_GPIO_BASE + TEGRA_NR_GPIOS); i++) {
struct irq_desc *desc = irq_to_desc(i);
if (!desc)
continue;
if (desc->status & IRQ_WAKEUP) {
int gpio = i - INT_GPIO_BASE;
pr_debug("gpio %d.%d is wakeup\n", gpio/8, gpio&7);
continue;
}
disable_irq(i);
}
local_irq_save(flags);
for (b = 0; b < ARRAY_SIZE(tegra_gpio_banks); b++) {
struct tegra_gpio_bank *bank = &tegra_gpio_banks[b];
for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
unsigned int gpio = (b<<5) | (p<<3);
bank->cnf[p] = __raw_readl(GPIO_CNF(gpio));
bank->out[p] = __raw_readl(GPIO_OUT(gpio));
bank->oe[p] = __raw_readl(GPIO_OE(gpio));
bank->int_enb[p] = __raw_readl(GPIO_INT_ENB(gpio));
bank->int_lvl[p] = __raw_readl(GPIO_INT_LVL(gpio));
}
}
local_irq_restore(flags);
}
static int tegra_gpio_wake_enable(unsigned int irq, unsigned int enable)
{
struct tegra_gpio_bank *bank = get_irq_chip_data(irq);
return set_irq_wake(bank->irq, enable);
}
#endif
static struct irq_chip tegra_gpio_irq_chip = { static struct irq_chip tegra_gpio_irq_chip = {
.name = "GPIO", .name = "GPIO",
@ -251,6 +329,9 @@ static struct irq_chip tegra_gpio_irq_chip = {
.mask = tegra_gpio_irq_mask, .mask = tegra_gpio_irq_mask,
.unmask = tegra_gpio_irq_unmask, .unmask = tegra_gpio_irq_unmask,
.set_type = tegra_gpio_irq_set_type, .set_type = tegra_gpio_irq_set_type,
#ifdef CONFIG_PM
.set_wake = tegra_gpio_wake_enable,
#endif
}; };
@ -274,7 +355,7 @@ static int __init tegra_gpio_init(void)
gpiochip_add(&tegra_gpio_chip); gpiochip_add(&tegra_gpio_chip);
for (i = INT_GPIO_BASE; i < (INT_GPIO_BASE + ARCH_NR_GPIOS); i++) { for (i = INT_GPIO_BASE; i < (INT_GPIO_BASE + TEGRA_NR_GPIOS); i++) {
bank = &tegra_gpio_banks[GPIO_BANK(irq_to_gpio(i))]; bank = &tegra_gpio_banks[GPIO_BANK(irq_to_gpio(i))];
lockdep_set_class(&irq_desc[i].lock, &gpio_lock_class); lockdep_set_class(&irq_desc[i].lock, &gpio_lock_class);
@ -312,15 +393,16 @@ static int dbg_gpio_show(struct seq_file *s, void *unused)
for (i = 0; i < 7; i++) { for (i = 0; i < 7; i++) {
for (j = 0; j < 4; j++) { for (j = 0; j < 4; j++) {
int gpio = tegra_gpio_compose(i, j, 0); int gpio = tegra_gpio_compose(i, j, 0);
seq_printf(s, "%d:%d %02x %02x %02x %02x %02x %02x %06x\n", seq_printf(s,
i, j, "%d:%d %02x %02x %02x %02x %02x %02x %06x\n",
__raw_readl(GPIO_CNF(gpio)), i, j,
__raw_readl(GPIO_OE(gpio)), __raw_readl(GPIO_CNF(gpio)),
__raw_readl(GPIO_OUT(gpio)), __raw_readl(GPIO_OE(gpio)),
__raw_readl(GPIO_IN(gpio)), __raw_readl(GPIO_OUT(gpio)),
__raw_readl(GPIO_INT_STA(gpio)), __raw_readl(GPIO_IN(gpio)),
__raw_readl(GPIO_INT_ENB(gpio)), __raw_readl(GPIO_INT_STA(gpio)),
__raw_readl(GPIO_INT_LVL(gpio))); __raw_readl(GPIO_INT_ENB(gpio)),
__raw_readl(GPIO_INT_LVL(gpio)));
} }
} }
return 0; return 0;

4
arch/arm/mach-tegra/include/mach/gpio.h
View File

@ -22,7 +22,7 @@
#include <mach/irqs.h> #include <mach/irqs.h>
#define ARCH_NR_GPIOS INT_GPIO_NR #define TEGRA_NR_GPIOS INT_GPIO_NR
#include <asm-generic/gpio.h> #include <asm-generic/gpio.h>
@ -35,7 +35,7 @@
static inline int gpio_to_irq(unsigned int gpio) static inline int gpio_to_irq(unsigned int gpio)
{ {
if (gpio < ARCH_NR_GPIOS) if (gpio < TEGRA_NR_GPIOS)
return INT_GPIO_BASE + gpio; return INT_GPIO_BASE + gpio;
return -EINVAL; return -EINVAL;
} }