From: Tarun Kanti DebBarma <tarun.kanti@ti.com>
Date: Wed, 23 Nov 2011 20:18:52 +0000 (+0530)
Subject: gpio/omap: optimize suspend and resume functions
X-Git-Tag: firefly_0821_release~3680^2~3226^2~24^2~8
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=065cd795d2721f8d2d1f2967ee6ed0aec07a4202;p=firefly-linux-kernel-4.4.55.git

gpio/omap: optimize suspend and resume functions

There is no need to operate on all the banks every time the function is called.
Just operate on the current bank passed by the framework.

Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
---

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 7e1e50c23f93..e9a30fa8715b 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -1052,6 +1052,8 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev)
 		goto err_free;
 	}
 
+	platform_set_drvdata(pdev, bank);
+
 	pm_runtime_enable(bank->dev);
 	pm_runtime_irq_safe(bank->dev);
 	pm_runtime_get_sync(bank->dev);
@@ -1080,44 +1082,46 @@ err_exit:
 #if defined(CONFIG_PM_SLEEP)
 static int omap_gpio_suspend(struct device *dev)
 {
-	struct gpio_bank *bank;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct gpio_bank *bank = platform_get_drvdata(pdev);
+	void __iomem *base = bank->base;
+	void __iomem *wakeup_enable;
+	unsigned long flags;
 
-	list_for_each_entry(bank, &omap_gpio_list, node) {
-		void __iomem *base = bank->base;
-		void __iomem *wake_status;
-		unsigned long flags;
+	if (!bank->mod_usage || !bank->loses_context)
+		return 0;
 
-		if (!bank->regs->wkup_en)
-			return 0;
+	if (!bank->regs->wkup_en || !bank->suspend_wakeup)
+		return 0;
 
-		wake_status = bank->base + bank->regs->wkup_en;
+	wakeup_enable = bank->base + bank->regs->wkup_en;
 
-		spin_lock_irqsave(&bank->lock, flags);
-		bank->saved_wakeup = __raw_readl(wake_status);
-		_gpio_rmw(base, bank->regs->wkup_en, 0xffffffff, 0);
-		_gpio_rmw(base, bank->regs->wkup_en, bank->suspend_wakeup, 1);
-		spin_unlock_irqrestore(&bank->lock, flags);
-	}
+	spin_lock_irqsave(&bank->lock, flags);
+	bank->saved_wakeup = __raw_readl(wakeup_enable);
+	_gpio_rmw(base, bank->regs->wkup_en, 0xffffffff, 0);
+	_gpio_rmw(base, bank->regs->wkup_en, bank->suspend_wakeup, 1);
+	spin_unlock_irqrestore(&bank->lock, flags);
 
 	return 0;
 }
 
 static int omap_gpio_resume(struct device *dev)
 {
-	struct gpio_bank *bank;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct gpio_bank *bank = platform_get_drvdata(pdev);
+	void __iomem *base = bank->base;
+	unsigned long flags;
 
-	list_for_each_entry(bank, &omap_gpio_list, node) {
-		void __iomem *base = bank->base;
-		unsigned long flags;
+	if (!bank->mod_usage || !bank->loses_context)
+		return 0;
 
-		if (!bank->regs->wkup_en)
-			return 0;
+	if (!bank->regs->wkup_en || !bank->saved_wakeup)
+		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);
-	}
+	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);
 
 	return 0;
 }