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 <charu@xxxxxx>
Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@xxxxxx>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
---
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 6e7399c..f36931a 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)
@@ -476,6 +478,19 @@ 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().
*/
@@ -530,6 +545,19 @@ 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);
}
@@ -556,6 +584,7 @@ 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;
@@ -617,6 +646,7 @@ 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)
@@ -1018,7 +1048,13 @@ 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)
mpuio_init(bank);
@@ -1027,6 +1063,13 @@ 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;
@@ -1037,7 +1080,7 @@ err_exit:
return ret;
}
-static int omap_gpio_suspend(void)
+static int omap_gpio_suspend(struct device *dev)
{
struct gpio_bank *bank;
@@ -1055,12 +1098,13 @@ static int omap_gpio_suspend(void)
bank->saved_wakeup = __raw_readl(wake_status);
MOD_REG_BIT(bank->regs->wkup_en, 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;
@@ -1069,18 +1113,16 @@ static void omap_gpio_resume(void)
unsigned long flags;
if (!bank->regs->wkup_en)
- return;
+ return 0;
+ pm_runtime_get_sync(dev);
spin_lock_irqsave(&bank->lock, flags);
MOD_REG_BIT(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,
-};
+ return 0;
+}
#ifdef CONFIG_ARCH_OMAP2PLUS
@@ -1104,6 +1146,11 @@ void omap2_gpio_prepare_for_idle(int off_mode)
if (!off_mode)
continue;
+ if (IS_ERR_VALUE(pm_runtime_put_sync_suspend(bank->dev) < 0))
+ dev_err(bank->dev, "%s: GPIO bank %d "
+ "pm_runtime_put_sync_suspend 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. */
@@ -1144,6 +1191,11 @@ 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);
@@ -1258,10 +1310,16 @@ static void omap_gpio_restore_context(struct gpio_bank *bank)
}
#endif
+static const struct dev_pm_ops gpio_pm_ops = {
+ .suspend = omap_gpio_suspend,
+ .resume = omap_gpio_resume,
+};
+
static struct platform_driver omap_gpio_driver = {
.probe = omap_gpio_probe,
.driver = {
.name = "omap_gpio",
+ .pm = &gpio_pm_ops,
},
};
@@ -1275,16 +1333,3 @@ 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);
--
1.7.0.4
--
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