From: Tarun Kanti DebBarma Date: Thu, 29 Sep 2011 01:53:22 +0000 (+0530) Subject: gpio/omap: use pm-runtime framework X-Git-Tag: firefly_0821_release~3680^2~3226^2~24^2~9 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=55b93c32520dc7ff0097db81db9b1e6b735951a9;p=firefly-linux-kernel-4.4.55.git gpio/omap: use pm-runtime framework Call runtime pm APIs pm_runtime_get_sync() and pm_runtime_put() for enabling/disabling clocks appropriately. Remove syscore_ops and instead use SET_RUNTIME_PM_OPS macro. There is no more need to call omap_device_disable_idle_on_suspend since driver is PM runtime adapted now. Signed-off-by: Charulatha V Signed-off-by: Tarun Kanti DebBarma Reviewed-by: Santosh Shilimkar Reviewed-by: Kevin Hilman Signed-off-by: Kevin Hilman --- diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c index dfda6b3478b2..1e0b750afcaa 100644 --- a/arch/arm/mach-omap2/gpio.c +++ b/arch/arm/mach-omap2/gpio.c @@ -136,8 +136,6 @@ static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused) return PTR_ERR(pdev); } - omap_device_disable_idle_on_suspend(pdev); - return 0; } diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 951d78435812..7e1e50c23f93 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include @@ -483,8 +484,14 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip); unsigned long flags; - spin_lock_irqsave(&bank->lock, flags); + /* + * If this is the first gpio_request for the bank, + * enable the bank module. + */ + if (!bank->mod_usage) + pm_runtime_get_sync(bank->dev); + spin_lock_irqsave(&bank->lock, flags); /* Set trigger to none. You need to enable the desired trigger with * request_irq() or set_irq_type(). */ @@ -540,6 +547,13 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) _reset_gpio(bank, bank->chip.base + offset); spin_unlock_irqrestore(&bank->lock, flags); + + /* + * If this is the last gpio to be freed in the bank, + * disable the bank module. + */ + if (!bank->mod_usage) + pm_runtime_put(bank->dev); } /* @@ -565,6 +579,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) bank = irq_get_handler_data(irq); isr_reg = bank->base + bank->regs->irqstatus; + pm_runtime_get_sync(bank->dev); if (WARN_ON(!isr_reg)) goto exit; @@ -625,6 +640,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) exit: if (!unmasked) chained_irq_exit(chip, desc); + pm_runtime_put(bank->dev); } static void gpio_irq_shutdown(struct irq_data *d) @@ -1037,6 +1053,7 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev) } pm_runtime_enable(bank->dev); + pm_runtime_irq_safe(bank->dev); pm_runtime_get_sync(bank->dev); if (bank->is_mpuio) @@ -1046,6 +1063,8 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev) omap_gpio_chip_init(bank); omap_gpio_show_rev(bank); + pm_runtime_put(bank->dev); + list_add_tail(&bank->node, &omap_gpio_list); return ret; @@ -1056,7 +1075,10 @@ err_exit: return ret; } -static int omap_gpio_suspend(void) +#ifdef CONFIG_ARCH_OMAP2PLUS + +#if defined(CONFIG_PM_SLEEP) +static int omap_gpio_suspend(struct device *dev) { struct gpio_bank *bank; @@ -1080,7 +1102,7 @@ static int omap_gpio_suspend(void) return 0; } -static void omap_gpio_resume(void) +static int omap_gpio_resume(struct device *dev) { struct gpio_bank *bank; @@ -1089,21 +1111,17 @@ static void omap_gpio_resume(void) unsigned long flags; if (!bank->regs->wkup_en) - return; + return 0; spin_lock_irqsave(&bank->lock, flags); _gpio_rmw(base, bank->regs->wkup_en, 0xffffffff, 0); _gpio_rmw(base, bank->regs->wkup_en, bank->saved_wakeup, 1); spin_unlock_irqrestore(&bank->lock, flags); } -} - -static struct syscore_ops omap_gpio_syscore_ops = { - .suspend = omap_gpio_suspend, - .resume = omap_gpio_resume, -}; -#ifdef CONFIG_ARCH_OMAP2PLUS + return 0; +} +#endif /* CONFIG_PM_SLEEP */ static void omap_gpio_save_context(struct gpio_bank *bank); static void omap_gpio_restore_context(struct gpio_bank *bank); @@ -1145,11 +1163,15 @@ void omap2_gpio_prepare_for_idle(int off_mode) __raw_writel(l2, bank->base + bank->regs->risingdetect); save_gpio_context: + if (bank->get_context_loss_count) bank->context_loss_count = bank->get_context_loss_count(bank->dev); omap_gpio_save_context(bank); + + if (!pm_runtime_suspended(bank->dev)) + pm_runtime_put(bank->dev); } } @@ -1168,6 +1190,9 @@ void omap2_gpio_resume_after_idle(void) for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++) clk_enable(bank->dbck); + if (pm_runtime_suspended(bank->dev)) + pm_runtime_get_sync(bank->dev); + if (bank->get_context_loss_count) { context_lost_cnt_after = bank->get_context_loss_count(bank->dev); @@ -1274,12 +1299,20 @@ static void omap_gpio_restore_context(struct gpio_bank *bank) bank->base + bank->regs->fallingdetect); __raw_writel(bank->context.dataout, bank->base + bank->regs->dataout); } +#else +#define omap_gpio_suspend NULL +#define omap_gpio_resume NULL #endif +static const struct dev_pm_ops gpio_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(omap_gpio_suspend, omap_gpio_resume) +}; + static struct platform_driver omap_gpio_driver = { .probe = omap_gpio_probe, .driver = { .name = "omap_gpio", + .pm = &gpio_pm_ops, }, }; @@ -1293,16 +1326,3 @@ static int __init omap_gpio_drv_reg(void) return platform_driver_register(&omap_gpio_driver); } postcore_initcall(omap_gpio_drv_reg); - -static int __init omap_gpio_sysinit(void) -{ - -#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS) - if (cpu_is_omap16xx() || cpu_class_is_omap2()) - register_syscore_ops(&omap_gpio_syscore_ops); -#endif - - return 0; -} - -arch_initcall(omap_gpio_sysinit);