linux-kernel - [PATCH 1/1] pinctrl: add IRQF_EARLY_RESUME flags with gpio irq for elan touchpad.

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Message-Id: <20200424091201.568-1-caizhaopeng@uniontech.com>
Date:   Fri, 24 Apr 2020 17:12:01 +0800
From:   caizhaopeng@...ontech.com
To:     Linus Walleij <linus.walleij@...aro.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andy@...nel.org>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Zhangyueqian <zhangyueqian@...ontech.com>,
        Zhangshuang <zhangshuang@...ontech.com>,
        Hualet Wang <wangyaohua@...ontech.com>,
        Zhanglei <zhanglei@...ontech.com>,
        Caicai <caizhaopeng@...ontech.com>
Subject: [PATCH 1/1] pinctrl: add IRQF_EARLY_RESUME flags with gpio irq for elan touchpad.

From: Caicai <caizhaopeng@...ontech.com>

I had tested two Notebook machines, the Intel i5(or amd ryzen)
with elan touchpad, and there's a probability that the touchpad
won't work after going to the S3/S4 to wake up, that it would
appear no more than 15 times. I found that there's no interrupt
to check for /proc/interrupt. It was found that the gpio
interrupt of i2c was also not on top. By adding the gpio
interrupt flags with IRQF_EARLY_RESUME, now the touchpad tested
200 + times works well.

Signed-off-by: Caicai <caizhaopeng@...ontech.com>
---
 drivers/pinctrl/intel/pinctrl-intel.c | 2 +-
 drivers/pinctrl/pinctrl-amd.c         | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
index 8fb6c9668c37..a350dade6aa0 100644
--- a/drivers/pinctrl/intel/pinctrl-intel.c
+++ b/drivers/pinctrl/intel/pinctrl-intel.c
@@ -1189,7 +1189,7 @@ static int intel_gpio_probe(struct intel_pinctrl *pctrl, int irq)
 	 * controllers share the same interrupt line.
 	 */
 	ret = devm_request_irq(pctrl->dev, irq, intel_gpio_irq,
-			       IRQF_SHARED | IRQF_NO_THREAD,
+			       IRQF_SHARED | IRQF_NO_THREAD | IRQF_EARLY_RESUME,
 			       dev_name(pctrl->dev), pctrl);
 	if (ret) {
 		dev_err(pctrl->dev, "failed to request interrupt\n");
diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c
index 977792654e01..70c37f4da2b1 100644
--- a/drivers/pinctrl/pinctrl-amd.c
+++ b/drivers/pinctrl/pinctrl-amd.c
@@ -937,7 +937,7 @@ static int amd_gpio_probe(struct platform_device *pdev)
 	}
 
 	ret = devm_request_irq(&pdev->dev, irq_base, amd_gpio_irq_handler,
-			       IRQF_SHARED, KBUILD_MODNAME, gpio_dev);
+			       IRQF_SHARED | IRQF_EARLY_RESUME | IRQF_NO_THREAD, KBUILD_MODNAME, gpio_dev);
 	if (ret)
 		goto out2;
 
-- 
2.20.1