+ Rajendra and Benoit to comment on optional clock handling.
On Thursday 04 August 2011 04:34 PM, Tarun Kanti DebBarma wrote:
Call runtime pm APIs pm_runtime_get_sync() and pm_runtime_put_sync() for enabling/disabling clocks appropriately. Remove syscore_ops and instead use dev_pm_ops now. Signed-off-by: Charulatha V<ch...@ti.com> Signed-off-by: Tarun Kanti DebBarma<tarun.ka...@ti.com> --- drivers/gpio/gpio-omap.c | 89 ++++++++++++++++++++++++++++++++++----------- 1 files changed, 67 insertions(+), 22 deletions(-) diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 0545d8f..bca6dcd 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -79,6 +79,8 @@ struct gpio_bank { struct omap_gpio_reg_offs *regs; }; +static void omap_gpio_mod_init(struct gpio_bank *bank); + #define GPIO_INDEX(bank, gpio) (gpio % bank->width) #define GPIO_BIT(bank, gpio) (1<< GPIO_INDEX(bank, gpio)) #define GPIO_MOD_CTRL_BIT BIT(0) @@ -481,6 +483,19 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) spin_lock_irqsave(&bank->lock, flags); + /* + * If this is the first gpio_request for the bank, + * enable the bank module. + */ + if (!bank->mod_usage) + if (IS_ERR_VALUE(pm_runtime_get_sync(bank->dev)< 0)) { + dev_err(bank->dev, "%s: GPIO bank %d " + "pm_runtime_get_sync failed\n", + __func__, bank->id); + spin_unlock_irqrestore(&bank->lock, flags); + return -EINVAL; + } + /* Set trigger to none. You need to enable the desired trigger with * request_irq() or set_irq_type(). */ @@ -535,6 +550,19 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) } _reset_gpio(bank, bank->chip.base + offset); + + /* + * If this is the last gpio to be freed in the bank, + * disable the bank module. + */ + if (!bank->mod_usage) { + if (IS_ERR_VALUE(pm_runtime_put_sync(bank->dev)< 0)) { + dev_err(bank->dev, "%s: GPIO bank %d " + "pm_runtime_put_sync failed\n", + __func__, bank->id); + } + } + spin_unlock_irqrestore(&bank->lock, flags); } @@ -561,6 +589,7 @@ 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; @@ -622,6 +651,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) exit: if (!unmasked) chained_irq_exit(chip, desc); + pm_runtime_put_sync_suspend(bank->dev); } static void gpio_irq_shutdown(struct irq_data *d) @@ -1023,7 +1053,13 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev) } pm_runtime_enable(bank->dev); - pm_runtime_get_sync(bank->dev); + pm_runtime_irq_safe(bank->dev); + if (IS_ERR_VALUE(pm_runtime_get_sync(bank->dev)< 0)) { + dev_err(bank->dev, "%s: GPIO bank %d pm_runtime_get_sync " + "failed\n", __func__, bank->id); + iounmap(bank->base); + return -EINVAL; + } if (bank->is_mpuio) { if (bank->regs->wkup_status) @@ -1034,6 +1070,13 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev) omap_gpio_chip_init(bank); omap_gpio_show_rev(bank); + if (IS_ERR_VALUE(pm_runtime_put_sync(bank->dev)< 0)) { + dev_err(bank->dev, "%s: GPIO bank %d pm_runtime_put_sync " + "failed\n", __func__, bank->id); + iounmap(bank->base); + return -EINVAL; + } + list_add_tail(&bank->node,&omap_gpio_list); return ret; @@ -1044,7 +1087,7 @@ err_exit: return ret; } -static int omap_gpio_suspend(void) +static int omap_gpio_suspend(struct device *dev) { struct gpio_bank *bank; @@ -1063,12 +1106,13 @@ static int omap_gpio_suspend(void) _gpio_rmw(base, bank->regs->wkup_status, bank->suspend_wakeup, 1); spin_unlock_irqrestore(&bank->lock, flags); + pm_runtime_put_sync(dev); } return 0; } -static void omap_gpio_resume(void) +static int omap_gpio_resume(struct device *dev) { struct gpio_bank *bank; @@ -1077,18 +1121,16 @@ static void omap_gpio_resume(void) unsigned long flags; if (!bank->regs->wkup_status) - return; + return 0; + pm_runtime_get_sync(dev); spin_lock_irqsave(&bank->lock, flags); _gpio_rmw(base, bank->regs->wkup_status, 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, -}; + return 0; +} #ifdef CONFIG_ARCH_OMAP2PLUS @@ -1112,6 +1154,11 @@ void omap2_gpio_prepare_for_idle(int off_mode) if (!off_mode) continue; + if (IS_ERR_VALUE(pm_runtime_put_sync(bank->dev)< 0)) + dev_err(bank->dev, "%s: GPIO bank %d " + "pm_runtime_put_sync failed\n", + __func__, bank->id); + /* If going to OFF, remove triggering for all * non-wakeup GPIOs. Otherwise spurious IRQs will be * generated. See OMAP2420 Errata item 1.101. */ @@ -1152,6 +1199,11 @@ void omap2_gpio_resume_after_idle(void) if (!bank->loses_context) continue; + if (IS_ERR_VALUE(pm_runtime_get_sync(bank->dev)< 0)) + dev_err(bank->dev, "%s: GPIO bank %d " + "pm_runtime_get_sync failed\n", + __func__, bank->id); + for (j = 0; j< hweight_long(bank->dbck_enable_mask); j++) clk_enable(bank->dbck);
Optional clock handling also should been addressed using runtime hooks, isn't it ? We still seems to use clock framework here? Regards Santosh -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html