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Date:   Sat, 20 Feb 2021 15:34:52 +0900
From:   Chanwoo Choi <cwchoi00@...il.com>
To:     Guru Das Srinagesh <gurus@...eaurora.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-arm-msm@...r.kernel.org, Rob Herring <robh+dt@...nel.org>
Cc:     Subbaraman Narayanamurthy <subbaram@...eaurora.org>,
        David Collins <collinsd@...eaurora.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Stephen Boyd <sboyd@...nel.org>,
        Anirudh Ghayal <aghayal@...eaurora.org>,
        Kavya Nunna <knunna@...eaurora.org>
Subject: Re: [RESEND PATCH v6 3/3] extcon: qcom-spmi: Add support for VBUS
 detection

Hi,

Please use get_maintainer.pl script when you send the patches.
I didn't receive the patches.  I'll review.

Thanks,
Chanwoo Choi

On 21. 1. 26. 오전 9:38, Guru Das Srinagesh wrote:
> From: Anirudh Ghayal <aghayal@...eaurora.org>
> 
> VBUS can be detected via a dedicated PMIC pin. Add support
> for reporting the VBUS status.
> 
> Signed-off-by: Anirudh Ghayal <aghayal@...eaurora.org>
> Signed-off-by: Kavya Nunna <knunna@...eaurora.org>
> Signed-off-by: Guru Das Srinagesh <gurus@...eaurora.org>
> ---
>   drivers/extcon/extcon-qcom-spmi-misc.c | 99 +++++++++++++++++++++++++++-------
>   1 file changed, 80 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/extcon/extcon-qcom-spmi-misc.c b/drivers/extcon/extcon-qcom-spmi-misc.c
> index 6b836ae..9e8ccfb 100644
> --- a/drivers/extcon/extcon-qcom-spmi-misc.c
> +++ b/drivers/extcon/extcon-qcom-spmi-misc.c
> @@ -1,7 +1,7 @@
>   // SPDX-License-Identifier: GPL-2.0-only
>   /**
>    * extcon-qcom-spmi-misc.c - Qualcomm USB extcon driver to support USB ID
> - *				detection based on extcon-usb-gpio.c.
> + *			and VBUS detection based on extcon-usb-gpio.c.
>    *
>    * Copyright (C) 2016 Linaro, Ltd.
>    * Stephen Boyd <stephen.boyd@...aro.org>
> @@ -21,30 +21,56 @@
>   
>   struct qcom_usb_extcon_info {
>   	struct extcon_dev *edev;
> -	int irq;
> +	int id_irq;
> +	int vbus_irq;
>   	struct delayed_work wq_detcable;
>   	unsigned long debounce_jiffies;
>   };
>   
>   static const unsigned int qcom_usb_extcon_cable[] = {
> +	EXTCON_USB,
>   	EXTCON_USB_HOST,
>   	EXTCON_NONE,
>   };
>   
>   static void qcom_usb_extcon_detect_cable(struct work_struct *work)
>   {
> -	bool id;
> +	bool state = false;
>   	int ret;
> +	union extcon_property_value val;
>   	struct qcom_usb_extcon_info *info = container_of(to_delayed_work(work),
>   						    struct qcom_usb_extcon_info,
>   						    wq_detcable);
>   
> -	/* check ID and update cable state */
> -	ret = irq_get_irqchip_state(info->irq, IRQCHIP_STATE_LINE_LEVEL, &id);
> -	if (ret)
> -		return;
> +	if (info->id_irq > 0) {
> +		/* check ID and update cable state */
> +		ret = irq_get_irqchip_state(info->id_irq,
> +				IRQCHIP_STATE_LINE_LEVEL, &state);
> +		if (ret)
> +			return;
> +
> +		if (!state) {
> +			val.intval = true;
> +			extcon_set_property(info->edev, EXTCON_USB_HOST,
> +						EXTCON_PROP_USB_SS, val);
> +		}
> +		extcon_set_state_sync(info->edev, EXTCON_USB_HOST, !state);
> +	}
>   
> -	extcon_set_state_sync(info->edev, EXTCON_USB_HOST, !id);
> +	if (info->vbus_irq > 0) {
> +		/* check VBUS and update cable state */
> +		ret = irq_get_irqchip_state(info->vbus_irq,
> +				IRQCHIP_STATE_LINE_LEVEL, &state);
> +		if (ret)
> +			return;
> +
> +		if (state) {
> +			val.intval = true;
> +			extcon_set_property(info->edev, EXTCON_USB,
> +						EXTCON_PROP_USB_SS, val);
> +		}
> +		extcon_set_state_sync(info->edev, EXTCON_USB, state);
> +	}
>   }
>   
>   static irqreturn_t qcom_usb_irq_handler(int irq, void *dev_id)
> @@ -79,21 +105,48 @@ static int qcom_usb_extcon_probe(struct platform_device *pdev)
>   		return ret;
>   	}
>   
> +	ret = extcon_set_property_capability(info->edev,
> +			EXTCON_USB, EXTCON_PROP_USB_SS);
> +	ret |= extcon_set_property_capability(info->edev,
> +			EXTCON_USB_HOST, EXTCON_PROP_USB_SS);
> +	if (ret) {
> +		dev_err(dev, "failed to register extcon props rc=%d\n",
> +						ret);
> +		return ret;
> +	}
> +
>   	info->debounce_jiffies = msecs_to_jiffies(USB_ID_DEBOUNCE_MS);
>   	INIT_DELAYED_WORK(&info->wq_detcable, qcom_usb_extcon_detect_cable);
>   
> -	info->irq = platform_get_irq_byname(pdev, "usb_id");
> -	if (info->irq < 0)
> -		return info->irq;
> +	info->id_irq = platform_get_irq_byname(pdev, "usb_id");
> +	if (info->id_irq > 0) {
> +		ret = devm_request_threaded_irq(dev, info->id_irq, NULL,
> +					qcom_usb_irq_handler,
> +					IRQF_TRIGGER_RISING |
> +					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
> +					pdev->name, info);
> +		if (ret < 0) {
> +			dev_err(dev, "failed to request handler for ID IRQ\n");
> +			return ret;
> +		}
> +	}
>   
> -	ret = devm_request_threaded_irq(dev, info->irq, NULL,
> +	info->vbus_irq = platform_get_irq_byname(pdev, "usb_vbus");
> +	if (info->vbus_irq > 0) {
> +		ret = devm_request_threaded_irq(dev, info->vbus_irq, NULL,
>   					qcom_usb_irq_handler,
>   					IRQF_TRIGGER_RISING |
>   					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
>   					pdev->name, info);
> -	if (ret < 0) {
> -		dev_err(dev, "failed to request handler for ID IRQ\n");
> -		return ret;
> +		if (ret < 0) {
> +			dev_err(dev, "failed to request handler for VBUS IRQ\n");
> +			return ret;
> +		}
> +	}
> +
> +	if (info->id_irq < 0 && info->vbus_irq < 0) {
> +		dev_err(dev, "ID and VBUS IRQ not found\n");
> +		return -EINVAL;
>   	}
>   
>   	platform_set_drvdata(pdev, info);
> @@ -120,8 +173,12 @@ static int qcom_usb_extcon_suspend(struct device *dev)
>   	struct qcom_usb_extcon_info *info = dev_get_drvdata(dev);
>   	int ret = 0;
>   
> -	if (device_may_wakeup(dev))
> -		ret = enable_irq_wake(info->irq);
> +	if (device_may_wakeup(dev)) {
> +		if (info->id_irq > 0)
> +			ret = enable_irq_wake(info->id_irq);
> +		if (info->vbus_irq > 0)
> +			ret = enable_irq_wake(info->vbus_irq);
> +	}
>   
>   	return ret;
>   }
> @@ -131,8 +188,12 @@ static int qcom_usb_extcon_resume(struct device *dev)
>   	struct qcom_usb_extcon_info *info = dev_get_drvdata(dev);
>   	int ret = 0;
>   
> -	if (device_may_wakeup(dev))
> -		ret = disable_irq_wake(info->irq);
> +	if (device_may_wakeup(dev)) {
> +		if (info->id_irq > 0)
> +			ret = disable_irq_wake(info->id_irq);
> +		if (info->vbus_irq > 0)
> +			ret = disable_irq_wake(info->vbus_irq);
> +	}
>   
>   	return ret;
>   }
> 

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