From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753933AbaAGE4v (ORCPT ); Mon, 6 Jan 2014 23:56:51 -0500 Received: from mail-pd0-f174.google.com ([209.85.192.174]:55562 "EHLO mail-pd0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751262AbaAGE4u (ORCPT ); Mon, 6 Jan 2014 23:56:50 -0500 From: RongJun Ying To: MyungJoo Ham , Chanwoo Choi , Barry Song Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Workgroup.linux@csr.com, Rongjun Ying Subject: [PATCH v3] extcon: gpio: Add power resume support Date: Tue, 7 Jan 2014 12:56:30 +0800 Message-Id: <1389070590-3139-1-git-send-email-rongjun.ying@csr.com> X-Mailer: git-send-email 1.7.5.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rongjun Ying When system on the suspend state, Some SoC can't get gpio interrupt. After system resume, need send extcon uevent to userspace. Signed-off-by: Rongjun Ying Reviewed-by: Barry Song --- -v3: 'check_on_resume' instead of 'load_sleep_irq' as Chanwoo Choi's proposal. drivers/extcon/extcon-gpio.c | 20 ++++++++++++++++++++ include/linux/extcon/extcon-gpio.h | 1 + 2 files changed, 21 insertions(+), 0 deletions(-) diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c index 7e0dff5..fde52c1 100644 --- a/drivers/extcon/extcon-gpio.c +++ b/drivers/extcon/extcon-gpio.c @@ -40,6 +40,7 @@ struct gpio_extcon_data { int irq; struct delayed_work work; unsigned long debounce_jiffies; + bool check_on_resume; }; static void gpio_extcon_work(struct work_struct *work) @@ -103,6 +104,7 @@ static int gpio_extcon_probe(struct platform_device *pdev) extcon_data->gpio_active_low = pdata->gpio_active_low; extcon_data->state_on = pdata->state_on; extcon_data->state_off = pdata->state_off; + extcon_data->check_on_resume = pdata->check_on_resume; if (pdata->state_on && pdata->state_off) extcon_data->edev.print_state = extcon_gpio_print_state; if (pdata->debounce) { @@ -159,12 +161,30 @@ static int gpio_extcon_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int gpio_extcon_resume(struct device *dev) +{ + struct gpio_extcon_data *extcon_data; + + extcon_data = dev_get_drvdata(dev); + if (extcon_data->check_on_resume) + queue_delayed_work(system_power_efficient_wq, + &extcon_data->work, extcon_data->debounce_jiffies); + return 0; +} +#endif + +static const struct dev_pm_ops gpio_extcon_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(NULL, gpio_extcon_resume) +}; + static struct platform_driver gpio_extcon_driver = { .probe = gpio_extcon_probe, .remove = gpio_extcon_remove, .driver = { .name = "extcon-gpio", .owner = THIS_MODULE, + .pm = &gpio_extcon_pm_ops, }, }; diff --git a/include/linux/extcon/extcon-gpio.h b/include/linux/extcon/extcon-gpio.h index 4195810..c7f0c3e 100644 --- a/include/linux/extcon/extcon-gpio.h +++ b/include/linux/extcon/extcon-gpio.h @@ -51,6 +51,7 @@ struct gpio_extcon_platform_data { /* if NULL, "0" or "1" will be printed */ const char *state_on; const char *state_off; + bool check_on_resume; }; #endif /* __EXTCON_GPIO_H__ */ -- 1.7.5.4