Message-ID: <4a041b5e-d43b-6eb9-81bb-2da4806146e5@quicinc.com>
Date:   Tue, 31 May 2022 13:55:53 +0530
From:   Harsh Agarwal <quic_harshq@...cinc.com>
To:     Pavan Kondeti <quic_pkondeti@...cinc.com>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Felipe Balbi <balbi@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <quic_ppratap@...cinc.com>
Subject: Re: [RFC v2 2/2] usb: dwc3: Refactor PHY logic to support Multiport
 Controller


On 5/27/2022 8:01 AM, Pavan Kondeti wrote:
> Hi Harsh,
>
> On Thu, May 26, 2022 at 03:43:49PM +0530, Harsh Agarwal wrote:
>> Currently the USB driver supports only single port controller
>> which works with 2 PHYs at max ie HS and SS.
>>
>> But some devices have "multiport" controller where a single
>> controller supports multiple ports and each port have their own
>> PHYs. Refactor PHY logic to support the same.
>>
>> This implementation is compatible with existing glue drivers.
>>
>> Signed-off-by: Harsh Agarwal <quic_harshq@...cinc.com>
>> ---
>>   drivers/usb/dwc3/core.c   | 420 +++++++++++++++++++++++++++++++++-------------
>>   drivers/usb/dwc3/core.h   |  12 +-
>>   drivers/usb/dwc3/drd.c    |  16 +-
>>   drivers/usb/dwc3/gadget.c |   4 +-
>>   4 files changed, 326 insertions(+), 126 deletions(-)
>>
>> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
>> index 2682469..def08ac 100644
>> --- a/drivers/usb/dwc3/core.c
>> +++ b/drivers/usb/dwc3/core.c
>> @@ -120,7 +120,7 @@ static void __dwc3_set_mode(struct work_struct *work)
>>   {
>>   	struct dwc3 *dwc = work_to_dwc(work);
>>   	unsigned long flags;
>> -	int ret;
>> +	int i, ret;
>>   	u32 reg;
>>   
>>   	mutex_lock(&dwc->mutex);
>> @@ -189,10 +189,13 @@ static void __dwc3_set_mode(struct work_struct *work)
>>   		if (ret) {
>>   			dev_err(dwc->dev, "failed to initialize host\n");
>>   		} else {
>> -			if (dwc->usb2_phy)
>> -				otg_set_vbus(dwc->usb2_phy->otg, true);
>> -			phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
>> -			phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
>> +			for (i = 0; i < dwc->num_hsphy; i++) {
>> +				if (dwc->usb2_phy[i])
>> +					otg_set_vbus(dwc->usb2_phy[i]->otg, true);
>> +				phy_set_mode(dwc->usb2_generic_phy[i], PHY_MODE_USB_HOST);
>> +			}
>> +			for (i = 0; i < dwc->num_ssphy; i++)
>> +				phy_set_mode(dwc->usb3_generic_phy[i], PHY_MODE_USB_HOST);
>>   			if (dwc->dis_split_quirk) {
>>   				reg = dwc3_readl(dwc->regs, DWC3_GUCTL3);
>>   				reg |= DWC3_GUCTL3_SPLITDISABLE;
>> @@ -205,10 +208,10 @@ static void __dwc3_set_mode(struct work_struct *work)
>>   
>>   		dwc3_event_buffers_setup(dwc);
>>   
>> -		if (dwc->usb2_phy)
>> -			otg_set_vbus(dwc->usb2_phy->otg, false);
>> -		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
>> -		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
>> +		if (dwc->usb2_phy[0])
>> +			otg_set_vbus(dwc->usb2_phy[0]->otg, false);
>> +		phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
>> +		phy_set_mode(dwc->usb3_generic_phy[0], PHY_MODE_USB_DEVICE);
>>   
>>   		ret = dwc3_gadget_init(dwc);
>>   		if (ret)
>> @@ -655,12 +658,18 @@ static int dwc3_core_ulpi_init(struct dwc3 *dwc)
>>    */
>>   static int dwc3_phy_setup(struct dwc3 *dwc)
>>   {
>> +	int i;
>>   	unsigned int hw_mode;
>>   	u32 reg;
>>   
>>   	hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
>>   
>>   	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
>> +	for (i = 1; i < dwc->num_ssphy; i++) {
>> +		if (reg != dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(i)))
>> +			dev_warn(dwc->dev,
>> +				"Reset values of pipectl registers 0 and %d are different!\n", i);
>> +	}
> Can you please elaborate on this? What is the purpose of checking POR reset
> values of other ports against first port? If this is some debug code, please
> remove it.
I was just keeping a safe check incase all the SS PORTs of a multiport 
controller has same
PIPECTL registers. I have removed it for now.
>
>>   
>>   	/*
>>   	 * Make sure UX_EXIT_PX is cleared as that causes issues with some
>> @@ -715,9 +724,15 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
>>   	if (dwc->dis_del_phy_power_chg_quirk)
>>   		reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE;
>>   
>> -	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
>> +	for (i = 0; i < dwc->num_ssphy; i++)
>> +		dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(i), reg);
>>   
>>   	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
>> +	for (i = 1; i < dwc->num_hsphy; i++) {
>> +		if (reg != dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i)))
>> +			dev_warn(dwc->dev,
>> +				"Reset values of usb2phycfg register 0 and %d are different!\n", i);
>> +	}
> ditto
same
>
>>   
>>   	/* Select the HS PHY interface */
>>   	switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) {
>> @@ -729,7 +744,8 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
>>   		} else if (dwc->hsphy_interface &&
>>   				!strncmp(dwc->hsphy_interface, "ulpi", 4)) {
>>   			reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
>> -			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
>> +			for (i = 0; i < dwc->num_hsphy; i++)
>> +				dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
>>   		} else {
>>   			/* Relying on default value. */
>>   			if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
>> @@ -786,7 +802,8 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
>>   	if (dwc->dis_u2_freeclk_exists_quirk)
>>   		reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
>>   
>> -	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
>> +	for (i = 0; i < dwc->num_hsphy; i++)
>> +		dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
>>   
>>   	return 0;
>>   }
>> @@ -825,17 +842,29 @@ static void dwc3_clk_disable(struct dwc3 *dwc)
>>   
>>   static void dwc3_core_exit(struct dwc3 *dwc)
>>   {
>> +	int i;
>>   	dwc3_event_buffers_cleanup(dwc);
>>   
>> -	usb_phy_shutdown(dwc->usb2_phy);
>> -	usb_phy_shutdown(dwc->usb3_phy);
>> -	phy_exit(dwc->usb2_generic_phy);
>> -	phy_exit(dwc->usb3_generic_phy);
>> +	for (i = 0; i < dwc->num_hsphy; i++) {
>> +		usb_phy_shutdown(dwc->usb2_phy[i]);
>> +		phy_exit(dwc->usb2_generic_phy[i]);
>> +	}
>> +
>> +	for (i = 0; i < dwc->num_ssphy; i++) {
>> +		usb_phy_shutdown(dwc->usb3_phy[i]);
>> +		phy_exit(dwc->usb3_generic_phy[i]);
>> +	}
>> +
>> +	for (i = 0; i < dwc->num_hsphy; i++) {
>> +		usb_phy_set_suspend(dwc->usb2_phy[i], 1);
>> +		phy_power_off(dwc->usb2_generic_phy[i]);
>> +	}
> can you club this block with the first for loop around num_hsphy?
Done. Please check the new PS which is without RFC.
>
>> +
>> +	for (i = 0; i < dwc->num_ssphy; i++) {
>> +		usb_phy_set_suspend(dwc->usb3_phy[i], 1);
>> +		phy_power_off(dwc->usb3_generic_phy[i]);
>> +	}
> can you club this block with the first for loop around num_ssphy?
Done
>>   
>> -	usb_phy_set_suspend(dwc->usb2_phy, 1);
>> -	usb_phy_set_suspend(dwc->usb3_phy, 1);
>> -	phy_power_off(dwc->usb2_generic_phy);
>> -	phy_power_off(dwc->usb3_generic_phy);
>>   	dwc3_clk_disable(dwc);
>>   	reset_control_assert(dwc->reset);
>>   }
>> @@ -1038,7 +1067,7 @@ static int dwc3_core_init(struct dwc3 *dwc)
>>   {
>>   	unsigned int		hw_mode;
>>   	u32			reg;
>> -	int			ret;
>> +	int			ret, i;
>>   
>>   	hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
>>   
>> @@ -1066,16 +1095,24 @@ static int dwc3_core_init(struct dwc3 *dwc)
>>   		dwc->phys_ready = true;
>>   	}
>>   
>> -	usb_phy_init(dwc->usb2_phy);
>> -	usb_phy_init(dwc->usb3_phy);
>> -	ret = phy_init(dwc->usb2_generic_phy);
>> -	if (ret < 0)
>> -		goto err0a;
>> +	for (i = 0; i < dwc->num_hsphy; i++)
>> +		usb_phy_init(dwc->usb2_phy[i]);
>> +	for (i = 0; i < dwc->num_ssphy; i++)
>> +		usb_phy_init(dwc->usb3_phy[i]);
>>   
>> -	ret = phy_init(dwc->usb3_generic_phy);
>> -	if (ret < 0) {
>> -		phy_exit(dwc->usb2_generic_phy);
>> -		goto err0a;
>> +	for (i = 0; i < dwc->num_hsphy; i++) {
>> +		ret = phy_init(dwc->usb2_generic_phy[i]);
>> +		if (ret < 0)
>> +			goto err0a;
>> +	}
>> +
>> +	for (i = 0; i < dwc->num_ssphy; i++) {
>> +		ret = phy_init(dwc->usb3_generic_phy[i]);
>> +		if (ret < 0) {
>> +			for (i = 0; i < dwc->num_hsphy; i++)
>> +				phy_exit(dwc->usb2_generic_phy[i]);
>> +			goto err0a;
>> +		}
>>   	}
>>   
>>   	ret = dwc3_core_soft_reset(dwc);
>> @@ -1085,15 +1122,19 @@ static int dwc3_core_init(struct dwc3 *dwc)
>>   	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD &&
>>   	    !DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) {
>>   		if (!dwc->dis_u3_susphy_quirk) {
>> -			reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
>> -			reg |= DWC3_GUSB3PIPECTL_SUSPHY;
>> -			dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
>> +			for (i = 0; i < dwc->num_ssphy; i++) {
>> +				reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(i));
>> +				reg |= DWC3_GUSB3PIPECTL_SUSPHY;
>> +				dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(i), reg);
>> +			}
>>   		}
>>   
>>   		if (!dwc->dis_u2_susphy_quirk) {
>> -			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
>> -			reg |= DWC3_GUSB2PHYCFG_SUSPHY;
>> -			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
>> +			for (i = 0; i < dwc->num_hsphy; i++) {
>> +				reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
>> +				reg |= DWC3_GUSB2PHYCFG_SUSPHY;
>> +				dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
>> +			}
>>   		}
>>   	}
>>   
>> @@ -1112,15 +1153,19 @@ static int dwc3_core_init(struct dwc3 *dwc)
>>   
>>   	dwc3_set_incr_burst_type(dwc);
>>   
>> -	usb_phy_set_suspend(dwc->usb2_phy, 0);
>> -	usb_phy_set_suspend(dwc->usb3_phy, 0);
>> -	ret = phy_power_on(dwc->usb2_generic_phy);
>> -	if (ret < 0)
>> -		goto err2;
>> +	for (i = 0; i < dwc->num_hsphy; i++) {
>> +		usb_phy_set_suspend(dwc->usb2_phy[i], 0);
>> +		ret = phy_power_on(dwc->usb2_generic_phy[i]);
>> +		if (ret < 0)
>> +			goto err2;
>> +	}
>>   
>> -	ret = phy_power_on(dwc->usb3_generic_phy);
>> -	if (ret < 0)
>> -		goto err3;
>> +	for (i = 0; i < dwc->num_ssphy; i++) {
>> +		usb_phy_set_suspend(dwc->usb3_phy[i], 0);
>> +		ret = phy_power_on(dwc->usb3_generic_phy[i]);
>> +		if (ret < 0)
>> +			goto err3;
>> +	}
>>   
>>   	ret = dwc3_event_buffers_setup(dwc);
>>   	if (ret) {
>> @@ -1228,20 +1273,29 @@ static int dwc3_core_init(struct dwc3 *dwc)
>>   	return 0;
>>   
>>   err4:
>> -	phy_power_off(dwc->usb3_generic_phy);
>> +	for (i = 0; i < dwc->num_ssphy; i++)
>> +		phy_power_off(dwc->usb3_generic_phy[i]);
>>   
>>   err3:
>> -	phy_power_off(dwc->usb2_generic_phy);
>> +	for (i = 0; i < dwc->num_hsphy; i++)
>> +		phy_power_off(dwc->usb2_generic_phy[i]);
>>   
>>   err2:
>> -	usb_phy_set_suspend(dwc->usb2_phy, 1);
>> -	usb_phy_set_suspend(dwc->usb3_phy, 1);
>> +	for (i = 0; i < dwc->num_hsphy; i++)
>> +		usb_phy_set_suspend(dwc->usb2_phy[i], 1);
>> +	for (i = 0; i < dwc->num_ssphy; i++)
>> +		usb_phy_set_suspend(dwc->usb3_phy[i], 1);
>>   
>>   err1:
>> -	usb_phy_shutdown(dwc->usb2_phy);
>> -	usb_phy_shutdown(dwc->usb3_phy);
>> -	phy_exit(dwc->usb2_generic_phy);
>> -	phy_exit(dwc->usb3_generic_phy);
>> +	for (i = 0; i < dwc->num_hsphy; i++) {
>> +		usb_phy_shutdown(dwc->usb2_phy[i]);
>> +		phy_exit(dwc->usb2_generic_phy[i]);
>> +	}
>> +
>> +	for (i = 0; i < dwc->num_ssphy; i++) {
>> +		usb_phy_shutdown(dwc->usb3_phy[i]);
>> +		phy_exit(dwc->usb3_generic_phy[i]);
>> +	}
>>   
>>   err0a:
>>   	dwc3_ulpi_exit(dwc);
>> @@ -1250,53 +1304,173 @@ static int dwc3_core_init(struct dwc3 *dwc)
>>   	return ret;
>>   }
>>   
>> -static int dwc3_core_get_phy(struct dwc3 *dwc)
>> +static struct usb_phy *dwc3_core_get_phy_by_handle_with_node(struct device *dev,
>> +	const char *phandle, u8 index, struct device_node *lookup_node)
>> +{
>> +	struct device_node *node;
>> +	struct usb_phy	*phy;
>> +
>> +	node = of_parse_phandle(lookup_node, phandle, index);
>> +	if (!node) {
>> +		dev_err(dev, "failed to get %s phandle in %pOF node\n", phandle,
>> +			dev->of_node);
>> +		return ERR_PTR(-ENODEV);
>> +	}
>> +	phy = devm_usb_get_phy_by_node(dev, node, NULL);
>> +	of_node_put(node);
>> +	return phy;
>> +}
> Can you call it devm_of_usb_get_phy_by_phandle() and add it to USB PHY library
> (include/linux/usb/phy.h and drivers/usb/phy/phy.c). A separate patch
> ofcourse.
Done. Please review the latest PS which is without RFC.
>
>> +
>> +static int dwc3_count_phys(struct dwc3 *dwc, struct device_node *lookup_node)
>> +{
>> +	int count;
>> +
>> +	count = of_count_phandle_with_args(lookup_node, "phys", NULL);
>> +
>> +	if (count == -ENOENT)
>> +		count = of_count_phandle_with_args(lookup_node, "usb-phy", NULL);
>> +
>> +	if (count == 1) {
>> +		dwc->num_hsphy++;
>> +	} else if (count == 2) {
>> +		dwc->num_hsphy++;
>> +		dwc->num_ssphy++;
>> +	} else {
>> +		return count;
>> +	}
>> +	return 0;
>> +}
>> +
>> +static int dwc3_extract_num_phys(struct dwc3 *dwc)
>> +{
>> +	struct device_node	*ports, *port;
>> +	int			ret;
>> +
>> +	/* Find if any "multiport" child is present inside DWC3*/
>> +	for_each_available_child_of_node(dwc->dev->of_node, ports) {
>> +		if (!strcmp(ports->name, "multiports"))
>> +			break;
>> +	}
>> +	if (!ports) {
>> +		dwc->num_hsphy = 1;
>> +		dwc->num_ssphy = 1;
>> +	} else {
>> +		for_each_available_child_of_node(ports, port) {
>> +			ret  = dwc3_count_phys(dwc, port);
>> +			if (ret)
>> +				return ret;
>> +		}
>> +	}
>> +	dev_info(dwc->dev, "Num of HS and SS PHY are %u %u\n", dwc->num_hsphy, dwc->num_ssphy);
>> +
>> +	dwc->usb2_phy = devm_kzalloc(dwc->dev,
>> +		sizeof(*dwc->usb2_phy) * dwc->num_hsphy, GFP_KERNEL);
>> +	if (!dwc->usb2_phy)
>> +		return -ENOMEM;
>> +
>> +	dwc->usb3_phy = devm_kzalloc(dwc->dev,
>> +		sizeof(*dwc->usb3_phy) * dwc->num_ssphy, GFP_KERNEL);
>> +	if (!dwc->usb3_phy)
>> +		return -ENOMEM;
>> +
>> +	dwc->usb2_generic_phy = devm_kzalloc(dwc->dev,
>> +		sizeof(*dwc->usb2_generic_phy) * dwc->num_hsphy, GFP_KERNEL);
>> +	if (!dwc->usb2_generic_phy)
>> +		return -ENOMEM;
>> +
>> +	dwc->usb3_generic_phy = devm_kzalloc(dwc->dev,
>> +		sizeof(*dwc->usb3_generic_phy) * dwc->num_ssphy, GFP_KERNEL);
>> +	if (!dwc->usb3_generic_phy)
>> +		return -ENOMEM;
>> +
>> +	return 0;
>> +}
>> +
> The parsing scheme looks good to me.
>
>> +static int dwc3_core_get_phy_by_node(struct dwc3 *dwc,
>> +		struct device_node *lookup_node, int i)
>>   {
>>   	struct device		*dev = dwc->dev;
>> -	struct device_node	*node = dev->of_node;
>> -	int ret;
>> +	int			ret;
>>   
>> -	if (node) {
>> -		dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
>> -		dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1);
>> +	if (lookup_node) {
>> +		dwc->usb2_phy[i] = dwc3_core_get_phy_by_handle_with_node(dev,
>> +								"usb-phy", 0, lookup_node);
>> +		dwc->usb3_phy[i] = dwc3_core_get_phy_by_handle_with_node(dev,
>> +								"usb-phy", 1, lookup_node);
>>   	} else {
>> -		dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
>> -		dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
>> +		dwc->usb2_phy[i] = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
>> +		dwc->usb3_phy[i] = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
>>   	}
>>   
>> -	if (IS_ERR(dwc->usb2_phy)) {
>> -		ret = PTR_ERR(dwc->usb2_phy);
>> +	if (IS_ERR(dwc->usb2_phy[i])) {
>> +		ret = PTR_ERR(dwc->usb2_phy[i]);
>>   		if (ret == -ENXIO || ret == -ENODEV)
>> -			dwc->usb2_phy = NULL;
>> +			dwc->usb2_phy[i] = NULL;
>>   		else
>>   			return dev_err_probe(dev, ret, "no usb2 phy configured\n");
>>   	}
>>   
>> -	if (IS_ERR(dwc->usb3_phy)) {
>> -		ret = PTR_ERR(dwc->usb3_phy);
>> +	if (IS_ERR(dwc->usb3_phy[i])) {
>> +		ret = PTR_ERR(dwc->usb3_phy[i]);
>>   		if (ret == -ENXIO || ret == -ENODEV)
>> -			dwc->usb3_phy = NULL;
>> +			dwc->usb3_phy[i] = NULL;
>>   		else
>>   			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
>>   	}
>>   
>> -	dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
>> -	if (IS_ERR(dwc->usb2_generic_phy)) {
>> -		ret = PTR_ERR(dwc->usb2_generic_phy);
>> -		if (ret == -ENOSYS || ret == -ENODEV)
>> -			dwc->usb2_generic_phy = NULL;
>> +	dwc->usb2_generic_phy[i] = devm_of_phy_get(dev, lookup_node, "usb2-phy");
>> +	if (IS_ERR(dwc->usb2_generic_phy[i])) {
>> +		ret = PTR_ERR(dwc->usb2_generic_phy[i]);
>> +		if (ret == -ENODEV)
>> +			dwc->usb2_generic_phy[i] = NULL;
>>   		else
>>   			return dev_err_probe(dev, ret, "no usb2 phy configured\n");
>>   	}
>>   
>> -	dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
>> -	if (IS_ERR(dwc->usb3_generic_phy)) {
>> -		ret = PTR_ERR(dwc->usb3_generic_phy);
>> -		if (ret == -ENOSYS || ret == -ENODEV)
>> -			dwc->usb3_generic_phy = NULL;
>> +	dwc->usb3_generic_phy[i] = devm_of_phy_get(dev, lookup_node, "usb3-phy");
>> +	if (IS_ERR(dwc->usb3_generic_phy[i])) {
>> +		ret = PTR_ERR(dwc->usb3_generic_phy[i]);
>> +		if (ret == -ENODEV)
>> +			dwc->usb3_generic_phy[i] = NULL;
>>   		else
>>   			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
>>   	}
>> +	return 0;
>> +}
>> +
>> +static int dwc3_core_get_phy(struct dwc3 *dwc)
>> +{
>> +	struct device		*dev = dwc->dev;
>> +	struct device_node	*node = dev->of_node;
>> +	struct device_node	*ports, *port;
>> +
>> +	int ret, i = 0;
> nit: remove the above empty line.
Done
>
>> +
>> +	ret = dwc3_extract_num_phys(dwc);
>> +	if (ret) {
>> +		dev_err(dwc->dev, "Unable to extract number of PHYs\n");
>> +		return ret;
>> +	}
>> +
>> +	/* Find if any "multiport" child is present inside DWC3*/
>> +	for_each_available_child_of_node(node, ports) {
>> +		if (!strcmp(ports->name, "multiport"))
>> +			break;
>> +	}
>> +
>> +	if (!ports) {
>> +		ret = dwc3_core_get_phy_by_node(dwc, node, 0);
>> +		if (ret)
>> +			return ret;
>> +	} else {
>> +		for_each_available_child_of_node(ports, port) {
>> +			ret = dwc3_core_get_phy_by_node(dwc, port, i);
>> +			if (ret)
>> +				return ret;
>> +			i++;
>> +		}
>> +	}
>> +	pr_info("USB phy all good\n");
> Remove this debug code. or make it dev_dbg with information.
Removed
>
> Thanks,
> Pavan

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