diff options
Diffstat (limited to 'arch/arm/plat-omap')
-rw-r--r-- | arch/arm/plat-omap/gpio.c | 177 | ||||
-rw-r--r-- | arch/arm/plat-omap/include/plat/gpio.h | 4 |
2 files changed, 49 insertions, 132 deletions
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c index 45a225d..955597f 100644 --- a/arch/arm/plat-omap/gpio.c +++ b/arch/arm/plat-omap/gpio.c @@ -27,6 +27,7 @@ #include <mach/irqs.h> #include <mach/gpio.h> #include <asm/mach/irq.h> +#include <plat/powerdomain.h> /* * OMAP1510 GPIO registers @@ -195,6 +196,7 @@ struct gpio_bank { struct gpio_chip chip; struct clk *dbck; u32 mod_usage; + u32 dbck_enable_mask; }; #define METHOD_MPUIO 0 @@ -303,8 +305,6 @@ struct omap3_gpio_regs { u32 risingdetect; u32 fallingdetect; u32 dataout; - u32 setwkuena; - u32 setdataout; }; static struct omap3_gpio_regs gpio_context[OMAP34XX_NR_GPIOS]; @@ -646,6 +646,7 @@ void omap_set_gpio_debounce(int gpio, int enable) goto done; if (cpu_is_omap34xx() || cpu_is_omap44xx()) { + bank->dbck_enable_mask = val; if (enable) clk_enable(bank->dbck); else @@ -724,15 +725,27 @@ static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio, OMAP4_GPIO_IRQWAKEN0); } } else { - if (trigger != 0) + /* + * GPIO wakeup request can only be generated on edge + * transitions + */ + if (trigger & IRQ_TYPE_EDGE_BOTH) __raw_writel(1 << gpio, bank->base + OMAP24XX_GPIO_SETWKUENA); else __raw_writel(1 << gpio, bank->base + OMAP24XX_GPIO_CLEARWKUENA); } - } else { - if (trigger != 0) + } + /* This part needs to be executed always for OMAP34xx */ + if (cpu_is_omap34xx() || (bank->non_wakeup_gpios & gpio_bit)) { + /* + * Log the edge gpio and manually trigger the IRQ + * after resume if the input level changes + * to avoid irq lost during PER RET/OFF mode + * Applies for omap2 non-wakeup gpio and all omap3 gpios + */ + if (trigger & IRQ_TYPE_EDGE_BOTH) bank->enabled_non_wakeup_gpios |= gpio_bit; else bank->enabled_non_wakeup_gpios &= ~gpio_bit; @@ -1845,7 +1858,8 @@ 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; } @@ -2028,16 +2042,27 @@ static struct sys_device omap_gpio_device = { static int workaround_enabled; -void omap2_gpio_prepare_for_retention(void) +void omap2_gpio_prepare_for_idle(int power_state) { int i, c = 0; + int min = 0; - /* 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++) { + if (cpu_is_omap34xx()) + min = 1; + + for (i = min; i < gpio_bank_count; i++) { struct gpio_bank *bank = &gpio_bank[i]; u32 l1, l2; + if (bank->dbck_enable_mask) + clk_disable(bank->dbck); + + if (power_state > PWRDM_POWER_OFF) + continue; + + /* If going to OFF, remove triggering for all + * non-wakeup GPIOs. Otherwise spurious IRQs will be + * generated. See OMAP2420 Errata item 1.101. */ if (!(bank->enabled_non_wakeup_gpios)) continue; @@ -2085,16 +2110,23 @@ void omap2_gpio_prepare_for_retention(void) workaround_enabled = 1; } -void omap2_gpio_resume_after_retention(void) +void omap2_gpio_resume_after_idle(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; + if (bank->dbck_enable_mask) + clk_enable(bank->dbck); + + if (!workaround_enabled) + continue; + if (!(bank->enabled_non_wakeup_gpios)) continue; @@ -2119,7 +2151,7 @@ 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 @@ -2207,10 +2239,6 @@ void omap_gpio_save_context(void) __raw_readl(bank->base + OMAP24XX_GPIO_FALLINGDETECT); gpio_context[i].dataout = __raw_readl(bank->base + OMAP24XX_GPIO_DATAOUT); - gpio_context[i].setwkuena = - __raw_readl(bank->base + OMAP24XX_GPIO_SETWKUENA); - gpio_context[i].setdataout = - __raw_readl(bank->base + OMAP24XX_GPIO_SETDATAOUT); } } @@ -2243,10 +2271,6 @@ void omap_gpio_restore_context(void) bank->base + OMAP24XX_GPIO_FALLINGDETECT); __raw_writel(gpio_context[i].dataout, bank->base + OMAP24XX_GPIO_DATAOUT); - __raw_writel(gpio_context[i].setwkuena, - bank->base + OMAP24XX_GPIO_SETWKUENA); - __raw_writel(gpio_context[i].setdataout, - bank->base + OMAP24XX_GPIO_SETDATAOUT); } } #endif @@ -2286,110 +2310,3 @@ static int __init omap_gpio_sysinit(void) } arch_initcall(omap_gpio_sysinit); - - -#ifdef CONFIG_DEBUG_FS - -#include <linux/debugfs.h> -#include <linux/seq_file.h> - -static int dbg_gpio_show(struct seq_file *s, void *unused) -{ - unsigned i, j, gpio; - - for (i = 0, gpio = 0; i < gpio_bank_count; i++) { - struct gpio_bank *bank = gpio_bank + i; - unsigned bankwidth = 16; - u32 mask = 1; - - if (bank_is_mpuio(bank)) - gpio = OMAP_MPUIO(0); - else if (cpu_class_is_omap2() || cpu_is_omap7xx()) - bankwidth = 32; - - for (j = 0; j < bankwidth; j++, gpio++, mask <<= 1) { - unsigned irq, value, is_in, irqstat; - const char *label; - - label = gpiochip_is_requested(&bank->chip, j); - if (!label) - continue; - - irq = bank->virtual_irq_start + j; - value = gpio_get_value(gpio); - is_in = gpio_is_input(bank, mask); - - if (bank_is_mpuio(bank)) - seq_printf(s, "MPUIO %2d ", j); - else - seq_printf(s, "GPIO %3d ", gpio); - seq_printf(s, "(%-20.20s): %s %s", - label, - is_in ? "in " : "out", - value ? "hi" : "lo"); - -/* FIXME for at least omap2, show pullup/pulldown state */ - - irqstat = irq_desc[irq].status; -#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS) - if (is_in && ((bank->suspend_wakeup & mask) - || irqstat & IRQ_TYPE_SENSE_MASK)) { - char *trigger = NULL; - - switch (irqstat & IRQ_TYPE_SENSE_MASK) { - case IRQ_TYPE_EDGE_FALLING: - trigger = "falling"; - break; - case IRQ_TYPE_EDGE_RISING: - trigger = "rising"; - break; - case IRQ_TYPE_EDGE_BOTH: - trigger = "bothedge"; - break; - case IRQ_TYPE_LEVEL_LOW: - trigger = "low"; - break; - case IRQ_TYPE_LEVEL_HIGH: - trigger = "high"; - break; - case IRQ_TYPE_NONE: - trigger = "(?)"; - break; - } - seq_printf(s, ", irq-%d %-8s%s", - irq, trigger, - (bank->suspend_wakeup & mask) - ? " wakeup" : ""); - } -#endif - seq_printf(s, "\n"); - } - - if (bank_is_mpuio(bank)) { - seq_printf(s, "\n"); - gpio = 0; - } - } - return 0; -} - -static int dbg_gpio_open(struct inode *inode, struct file *file) -{ - return single_open(file, dbg_gpio_show, &inode->i_private); -} - -static const struct file_operations debug_fops = { - .open = dbg_gpio_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int __init omap_gpio_debuginit(void) -{ - (void) debugfs_create_file("omap_gpio", S_IRUGO, - NULL, NULL, &debug_fops); - return 0; -} -late_initcall(omap_gpio_debuginit); -#endif diff --git a/arch/arm/plat-omap/include/plat/gpio.h b/arch/arm/plat-omap/include/plat/gpio.h index de7c547..de1c604 100644 --- a/arch/arm/plat-omap/include/plat/gpio.h +++ b/arch/arm/plat-omap/include/plat/gpio.h @@ -72,8 +72,8 @@ IH_GPIO_BASE + (nr)) extern int omap_gpio_init(void); /* Call from board init only */ -extern void omap2_gpio_prepare_for_retention(void); -extern void omap2_gpio_resume_after_retention(void); +extern void omap2_gpio_prepare_for_idle(int power_state); +extern void omap2_gpio_resume_after_idle(void); extern void omap_set_gpio_debounce(int gpio, int enable); extern void omap_set_gpio_debounce_time(int gpio, int enable); extern void omap_gpio_save_context(void); |