diff options
Diffstat (limited to 'drivers/input/keyboard/samsung-keypad.c')
| -rw-r--r-- | drivers/input/keyboard/samsung-keypad.c | 108 |
1 files changed, 82 insertions, 26 deletions
diff --git a/drivers/input/keyboard/samsung-keypad.c b/drivers/input/keyboard/samsung-keypad.c index 8a0060cd3982..17ba7f9f80f3 100644 --- a/drivers/input/keyboard/samsung-keypad.c +++ b/drivers/input/keyboard/samsung-keypad.c @@ -20,11 +20,13 @@ #include <linux/io.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> #include <linux/slab.h> #include <linux/of.h> #include <linux/of_gpio.h> #include <linux/sched.h> -#include <plat/keypad.h> +#include <linux/input/samsung-keypad.h> #define SAMSUNG_KEYIFCON 0x00 #define SAMSUNG_KEYIFSTSCLR 0x04 @@ -65,10 +67,12 @@ enum samsung_keypad_type { struct samsung_keypad { struct input_dev *input_dev; + struct platform_device *pdev; struct clk *clk; void __iomem *base; wait_queue_head_t wait; bool stopped; + bool wake_enabled; int irq; enum samsung_keypad_type type; unsigned int row_shift; @@ -155,6 +159,8 @@ static irqreturn_t samsung_keypad_irq(int irq, void *dev_id) unsigned int val; bool key_down; + pm_runtime_get_sync(&keypad->pdev->dev); + do { val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR); /* Clear interrupt. */ @@ -169,6 +175,8 @@ static irqreturn_t samsung_keypad_irq(int irq, void *dev_id) } while (key_down && !keypad->stopped); + pm_runtime_put_sync(&keypad->pdev->dev); + return IRQ_HANDLED; } @@ -176,6 +184,8 @@ static void samsung_keypad_start(struct samsung_keypad *keypad) { unsigned int val; + pm_runtime_get_sync(&keypad->pdev->dev); + /* Tell IRQ thread that it may poll the device. */ keypad->stopped = false; @@ -188,12 +198,16 @@ static void samsung_keypad_start(struct samsung_keypad *keypad) /* KEYIFCOL reg clear. */ writel(0, keypad->base + SAMSUNG_KEYIFCOL); + + pm_runtime_put_sync(&keypad->pdev->dev); } static void samsung_keypad_stop(struct samsung_keypad *keypad) { unsigned int val; + pm_runtime_get_sync(&keypad->pdev->dev); + /* Signal IRQ thread to stop polling and disable the handler. */ keypad->stopped = true; wake_up(&keypad->wait); @@ -214,6 +228,8 @@ static void samsung_keypad_stop(struct samsung_keypad *keypad) * re-enable the handler. */ enable_irq(keypad->irq); + + pm_runtime_put_sync(&keypad->pdev->dev); } static int samsung_keypad_open(struct input_dev *input_dev) @@ -418,9 +434,11 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev) } keypad->input_dev = input_dev; + keypad->pdev = pdev; keypad->row_shift = row_shift; keypad->rows = pdata->rows; keypad->cols = pdata->cols; + keypad->stopped = true; init_waitqueue_head(&keypad->wait); if (pdev->dev.of_node) { @@ -467,13 +485,14 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev) goto err_put_clk; } + device_init_wakeup(&pdev->dev, pdata->wakeup); + platform_set_drvdata(pdev, keypad); + pm_runtime_enable(&pdev->dev); + error = input_register_device(keypad->input_dev); if (error) goto err_free_irq; - device_init_wakeup(&pdev->dev, pdata->wakeup); - platform_set_drvdata(pdev, keypad); - if (pdev->dev.of_node) { devm_kfree(&pdev->dev, (void *)pdata->keymap_data->keymap); devm_kfree(&pdev->dev, (void *)pdata->keymap_data); @@ -483,6 +502,9 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev) err_free_irq: free_irq(keypad->irq, keypad); + pm_runtime_disable(&pdev->dev); + device_init_wakeup(&pdev->dev, 0); + platform_set_drvdata(pdev, NULL); err_put_clk: clk_put(keypad->clk); samsung_keypad_dt_gpio_free(keypad); @@ -499,6 +521,7 @@ static int __devexit samsung_keypad_remove(struct platform_device *pdev) { struct samsung_keypad *keypad = platform_get_drvdata(pdev); + pm_runtime_disable(&pdev->dev); device_init_wakeup(&pdev->dev, 0); platform_set_drvdata(pdev, NULL); @@ -519,11 +542,57 @@ static int __devexit samsung_keypad_remove(struct platform_device *pdev) return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_RUNTIME +static int samsung_keypad_runtime_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct samsung_keypad *keypad = platform_get_drvdata(pdev); + unsigned int val; + int error; + + if (keypad->stopped) + return 0; + + /* This may fail on some SoCs due to lack of controller support */ + error = enable_irq_wake(keypad->irq); + if (!error) + keypad->wake_enabled = true; + + val = readl(keypad->base + SAMSUNG_KEYIFCON); + val |= SAMSUNG_KEYIFCON_WAKEUPEN; + writel(val, keypad->base + SAMSUNG_KEYIFCON); + + clk_disable(keypad->clk); + + return 0; +} + +static int samsung_keypad_runtime_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct samsung_keypad *keypad = platform_get_drvdata(pdev); + unsigned int val; + + if (keypad->stopped) + return 0; + + clk_enable(keypad->clk); + + val = readl(keypad->base + SAMSUNG_KEYIFCON); + val &= ~SAMSUNG_KEYIFCON_WAKEUPEN; + writel(val, keypad->base + SAMSUNG_KEYIFCON); + + if (keypad->wake_enabled) + disable_irq_wake(keypad->irq); + + return 0; +} +#endif + +#ifdef CONFIG_PM_SLEEP static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad, bool enable) { - struct device *dev = keypad->input_dev->dev.parent; unsigned int val; clk_enable(keypad->clk); @@ -531,11 +600,11 @@ static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad, val = readl(keypad->base + SAMSUNG_KEYIFCON); if (enable) { val |= SAMSUNG_KEYIFCON_WAKEUPEN; - if (device_may_wakeup(dev)) + if (device_may_wakeup(&keypad->pdev->dev)) enable_irq_wake(keypad->irq); } else { val &= ~SAMSUNG_KEYIFCON_WAKEUPEN; - if (device_may_wakeup(dev)) + if (device_may_wakeup(&keypad->pdev->dev)) disable_irq_wake(keypad->irq); } writel(val, keypad->base + SAMSUNG_KEYIFCON); @@ -578,12 +647,13 @@ static int samsung_keypad_resume(struct device *dev) return 0; } +#endif static const struct dev_pm_ops samsung_keypad_pm_ops = { - .suspend = samsung_keypad_suspend, - .resume = samsung_keypad_resume, + SET_SYSTEM_SLEEP_PM_OPS(samsung_keypad_suspend, samsung_keypad_resume) + SET_RUNTIME_PM_OPS(samsung_keypad_runtime_suspend, + samsung_keypad_runtime_resume, NULL) }; -#endif #ifdef CONFIG_OF static const struct of_device_id samsung_keypad_dt_match[] = { @@ -615,27 +685,13 @@ static struct platform_driver samsung_keypad_driver = { .name = "samsung-keypad", .owner = THIS_MODULE, .of_match_table = samsung_keypad_dt_match, -#ifdef CONFIG_PM .pm = &samsung_keypad_pm_ops, -#endif }, .id_table = samsung_keypad_driver_ids, }; - -static int __init samsung_keypad_init(void) -{ - return platform_driver_register(&samsung_keypad_driver); -} -module_init(samsung_keypad_init); - -static void __exit samsung_keypad_exit(void) -{ - platform_driver_unregister(&samsung_keypad_driver); -} -module_exit(samsung_keypad_exit); +module_platform_driver(samsung_keypad_driver); MODULE_DESCRIPTION("Samsung keypad driver"); MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>"); MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:samsung-keypad"); |