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Message-ID: <2564b493-1c6d-813d-9b35-79f9047d535e@quicinc.com>
Date: Wed, 8 Jun 2022 19:59:39 +0530
From: Harsh Agarwal <quic_harshq@...cinc.com>
To: Andrew Halaney <ahalaney@...hat.com>
CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Rob Herring <robh+dt@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
Felipe Balbi <balbi@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
<linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <quic_pkondeti@...cinc.com>,
<quic_ppratap@...cinc.com>, <quic_jackp@...cinc.com>
Subject: Re: [PATCH 3/3] usb: dwc3: Refactor PHY logic to support Multiport
Controller
On 6/6/2022 6:34 PM, Andrew Halaney wrote:
> On Sun, Jun 05, 2022 at 11:51:38PM +0530, Harsh Agarwal wrote:
>> On 6/2/2022 1:23 AM, Andrew Halaney wrote:
>>> On Tue, May 31, 2022 at 01:50:17PM +0530, Harsh Agarwal wrote:
>>>> Currently the DWC3 driver supports only single port controller
>>>> which requires at most 2 PHYs ie HS and SS PHYs.
>>>>
>>>> But some SOCs have a "multiport" USB DWC3 controller where a
>>>> single controller supports multiple ports and each port have
>>>> their own PHYs. Refactor PHY logic to support the same.
>>>>
>>>> Signed-off-by: Harsh Agarwal <quic_harshq@...cinc.com>
>>>> ---
>>>> drivers/usb/dwc3/core.c | 400 +++++++++++++++++++++++++++++++++-------------
>>>> drivers/usb/dwc3/core.h | 12 +-
>>>> drivers/usb/dwc3/drd.c | 16 +-
>>>> drivers/usb/dwc3/gadget.c | 4 +-
>>>> 4 files changed, 305 insertions(+), 127 deletions(-)
>>>>
>>>> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
>>>> index 5734219..5cc799e 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_usb2_phy; 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_usb3_phy; 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)
>>>> @@ -656,6 +659,7 @@ 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;
>>>> @@ -716,7 +720,8 @@ 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_usb3_phy; i++)
>>>> + dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(i), reg);
>>>> reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
>>>> @@ -730,7 +735,8 @@ 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_usb2_phy; i++)
>>>> + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
>>>> } else {
>>>> /* Relying on default value. */
>>>> if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
>>>> @@ -787,7 +793,8 @@ 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_usb2_phy; i++)
>>>> + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
>>>> return 0;
>>>> }
>>>> @@ -826,17 +833,23 @@ 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_usb2_phy; i++) {
>>>> + usb_phy_shutdown(dwc->usb2_phy[i]);
>>>> + usb_phy_set_suspend(dwc->usb2_phy[i], 1);
>>>> + phy_exit(dwc->usb2_generic_phy[i]);
>>>> + phy_power_off(dwc->usb2_generic_phy[i]);
>>>> + }
>>>> +
>>>> + for (i = 0; i < dwc->num_usb3_phy; i++) {
>>>> + usb_phy_shutdown(dwc->usb3_phy[i]);
>>>> + usb_phy_set_suspend(dwc->usb3_phy[i], 1);
>>>> + phy_exit(dwc->usb3_generic_phy[i]);
>>>> + phy_power_off(dwc->usb3_generic_phy[i]);
>>>> + }
>>>> - 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);
>>>> }
>>>> @@ -1039,7 +1052,7 @@ 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);
>>>> @@ -1067,16 +1080,24 @@ 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_usb2_phy; i++)
>>>> + usb_phy_init(dwc->usb2_phy[i]);
>>>> + for (i = 0; i < dwc->num_usb3_phy; 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_usb2_phy; i++) {
>>>> + ret = phy_init(dwc->usb2_generic_phy[i]);
>>>> + if (ret < 0)
>>>> + goto err0a;
>>> Should we clean up the prior phys that did not fail? There's a couple
>>> loops where that question stands in this patch.
>> I am just keeping the Generic PHY implementation as is.
>> Earlier also we were cleaning up the HS PHY incase
>> SS PHY fails, so keeping the same for Multiport.
>> For you please point out if you find any major concern here?
> Earlier, there was only one usb2_generic_phy/usb3_generic_phy, so if
> phy_init(usb2_generic_phy) returned an error, it wasn't initialized, and
> it did not need a matching call to phy_exit(usb2_generic_phy).
>
> That is being called though ifthe superspeed phy fails since the
> highspeed one did successfully init, so things are cleaned up in the
> old cases.
>
> My point now is that, say with 4 highspeed phys, the 3rd one fails.
> i.e. phy_init(usb2_generic_phy[i]) where i == 2. In that case we don't
> ever call phy_exit() on the first two phys. I wouldn't say it is a
> major concern, but cleanup here is not fully done.
>
> You could do something like this to do clean it all up, kind of annoying
> though:
>
> for (i = 0; i < dwc->num_usb2_phy; i++) {
> ret = phy_init(dwc->usb2_generic_phy[i]);
> if (ret < 0) {
> /* clean up prior phys we initialized */
> for (j = 0; j < i; j++)
> phy_exit(usb2_generic_phy[j]);
> goto err0a;
> }
> }
>
> Thanks,
> Andrew
yes agree with your analysis.
Also, if any SSPHY init fails, then clear already initialized SSPHYs and
HSPHYs.
I am thinking instead of adding all this logic, we can just do "goto err1"
instead of "goto err0a".
Similar approach if usb_phy_init fails ( Non-Generic phys)
>
>>>> + }
>>>> +
>>>> + for (i = 0; i < dwc->num_usb3_phy; i++) {
>>>> + ret = phy_init(dwc->usb3_generic_phy[i]);
>>>> + if (ret < 0) {
>>>> + for (i = 0; i < dwc->num_usb2_phy; i++)
>>>> + phy_exit(dwc->usb2_generic_phy[i]);
>>>> + goto err0a;
>>>> + }
>>>> }
>>>> ret = dwc3_core_soft_reset(dwc);
>>>> @@ -1086,15 +1107,19 @@ 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_usb3_phy; 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_usb2_phy; i++) {
>>>> + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
>>>> + reg |= DWC3_GUSB2PHYCFG_SUSPHY;
>>>> + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
>>>> + }
>>>> }
>>>> }
>>>> @@ -1113,15 +1138,19 @@ 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_usb2_phy; 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_usb3_phy; 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) {
>>>> @@ -1229,20 +1258,29 @@ static int dwc3_core_init(struct dwc3 *dwc)
>>>> return 0;
>>>> err4:
>>>> - phy_power_off(dwc->usb3_generic_phy);
>>>> + for (i = 0; i < dwc->num_usb3_phy; i++)
>>>> + phy_power_off(dwc->usb3_generic_phy[i]);
>>>> err3:
>>>> - phy_power_off(dwc->usb2_generic_phy);
>>>> + for (i = 0; i < dwc->num_usb2_phy; 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_usb2_phy; i++)
>>>> + usb_phy_set_suspend(dwc->usb2_phy[i], 1);
>>>> + for (i = 0; i < dwc->num_usb3_phy; 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_usb2_phy; i++) {
>>>> + usb_phy_shutdown(dwc->usb2_phy[i]);
>>>> + phy_exit(dwc->usb2_generic_phy[i]);
>>>> + }
>>>> +
>>>> + for (i = 0; i < dwc->num_usb3_phy; i++) {
>>>> + usb_phy_shutdown(dwc->usb3_phy[i]);
>>>> + phy_exit(dwc->usb3_generic_phy[i]);
>>>> + }
>>>> err0a:
>>>> dwc3_ulpi_exit(dwc);
>>>> @@ -1251,53 +1289,172 @@ 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;
>>>> +}
>>>> +
>>>> +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_usb2_phy++;
>>>> + } else if (count == 2) {
>>>> + dwc->num_usb2_phy++;
>>>> + dwc->num_usb3_phy++;
>>>> + } 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*/
>>> Nit, space after DWC3
>> Done
>>>> + for_each_available_child_of_node(dwc->dev->of_node, ports) {
>>>> + if (!strcmp(ports->name, "multiport"))
>>>> + break;
>>>> + }
>>>> + if (!ports) {
>>>> + dwc->num_usb2_phy = 1;
>>>> + dwc->num_usb3_phy = 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_usb2_phy,
>>>> + dwc->num_usb3_phy);
>>>> +
>>>> + dwc->usb2_phy = devm_kzalloc(dwc->dev,
>>>> + sizeof(*dwc->usb2_phy) * dwc->num_usb2_phy, GFP_KERNEL);
>>>> + if (!dwc->usb2_phy)
>>>> + return -ENOMEM;
>>>> +
>>>> + dwc->usb3_phy = devm_kzalloc(dwc->dev,
>>>> + sizeof(*dwc->usb3_phy) * dwc->num_usb3_phy, GFP_KERNEL);
>>>> + if (!dwc->usb3_phy)
>>>> + return -ENOMEM;
>>>> +
>>>> + dwc->usb2_generic_phy = devm_kzalloc(dwc->dev,
>>>> + sizeof(*dwc->usb2_generic_phy) * dwc->num_usb2_phy, GFP_KERNEL);
>>>> + if (!dwc->usb2_generic_phy)
>>>> + return -ENOMEM;
>>>> +
>>>> + dwc->usb3_generic_phy = devm_kzalloc(dwc->dev,
>>>> + sizeof(*dwc->usb3_generic_phy) * dwc->num_usb3_phy, GFP_KERNEL);
>>>> + if (!dwc->usb3_generic_phy)
>>>> + return -ENOMEM;
>>>> +
>>>> + return 0;
>>>> +}
>>>> +
>>>> +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] = devm_of_usb_get_phy_by_phandle(dev,
>>>> + "usb-phy", 0, lookup_node);
>>>> + dwc->usb3_phy[i] = devm_of_usb_get_phy_by_phandle(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)
>>> I think this can be -ENOSYS if !CONFIG_GENERIC_PHY
>> For now, I have added it back
>>>> + 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;
>>>> +
>>>> + 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*/
>>> Nit, space after DWC3
>> Done
>>>> + 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++;
>>>> + }
>>>> + }
>>>> return 0;
>>>> }
>>>> @@ -1305,16 +1462,16 @@ static int dwc3_core_get_phy(struct dwc3 *dwc)
>>>> static int dwc3_core_init_mode(struct dwc3 *dwc)
>>>> {
>>>> struct device *dev = dwc->dev;
>>>> - int ret;
>>>> + int i, ret;
>>>> switch (dwc->dr_mode) {
>>>> case USB_DR_MODE_PERIPHERAL:
>>>> dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
>>>> - 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)
>>>> @@ -1323,10 +1480,15 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
>>>> case USB_DR_MODE_HOST:
>>>> dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
>>>> - 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_usb3_phy; 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_usb3_phy; i++)
>>>> + phy_set_mode(dwc->usb3_generic_phy[i], PHY_MODE_USB_HOST);
>>>> ret = dwc3_host_init(dwc);
>>>> if (ret)
>>>> @@ -1674,7 +1836,7 @@ static int dwc3_probe(struct platform_device *pdev)
>>>> struct resource *res, dwc_res;
>>>> struct dwc3 *dwc;
>>>> - int ret;
>>>> + int ret, i;
>>>> void __iomem *regs;
>>>> @@ -1839,15 +2001,18 @@ static int dwc3_probe(struct platform_device *pdev)
>>>> dwc3_debugfs_exit(dwc);
>>>> 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);
>>>> -
>>>> - 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);
>>>> + for (i = 0; i < dwc->num_usb2_phy; i++) {
>>>> + usb_phy_shutdown(dwc->usb2_phy[i]);
>>>> + usb_phy_set_suspend(dwc->usb2_phy[i], 1);
>>>> + phy_exit(dwc->usb2_generic_phy[i]);
>>>> + phy_power_off(dwc->usb2_generic_phy[i]);
>>>> + }
>>>> + for (i = 0; i < dwc->num_usb3_phy; i++) {
>>>> + usb_phy_shutdown(dwc->usb3_phy[i]);
>>>> + usb_phy_set_suspend(dwc->usb3_phy[i], 1);
>>>> + phy_exit(dwc->usb3_generic_phy[i]);
>>>> + phy_power_off(dwc->usb3_generic_phy[i]);
>>>> + }
>>>> dwc3_ulpi_exit(dwc);
>>>> @@ -1929,6 +2094,7 @@ static int dwc3_core_init_for_resume(struct dwc3 *dwc)
>>>> static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
>>>> {
>>>> + int i;
>>>> unsigned long flags;
>>>> u32 reg;
>>>> @@ -1951,17 +2117,21 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
>>>> /* Let controller to suspend HSPHY before PHY driver suspends */
>>>> if (dwc->dis_u2_susphy_quirk ||
>>>> dwc->dis_enblslpm_quirk) {
>>>> - reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
>>>> - reg |= DWC3_GUSB2PHYCFG_ENBLSLPM |
>>>> - DWC3_GUSB2PHYCFG_SUSPHY;
>>>> - dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
>>>> -
>>>> - /* Give some time for USB2 PHY to suspend */
>>>> - usleep_range(5000, 6000);
>>>> + for (i = 0; i < dwc->num_usb2_phy; i++) {
>>>> + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
>>>> + reg |= DWC3_GUSB2PHYCFG_ENBLSLPM |
>>>> + DWC3_GUSB2PHYCFG_SUSPHY;
>>>> + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
>>>> +
>>>> + /* Give some time for USB2 PHY to suspend */
>>>> + usleep_range(5000, 6000);
>>>> + }
>>>> }
>>>> - phy_pm_runtime_put_sync(dwc->usb2_generic_phy);
>>>> - phy_pm_runtime_put_sync(dwc->usb3_generic_phy);
>>>> + for (i = 0; i < dwc->num_usb2_phy; i++)
>>>> + phy_pm_runtime_put_sync(dwc->usb2_generic_phy[i]);
>>>> + for (i = 0; i < dwc->num_usb3_phy; i++)
>>>> + phy_pm_runtime_put_sync(dwc->usb3_generic_phy[i]);
>>>> break;
>>>> case DWC3_GCTL_PRTCAP_OTG:
>>>> /* do nothing during runtime_suspend */
>>>> @@ -1989,7 +2159,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
>>>> static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
>>>> {
>>>> unsigned long flags;
>>>> - int ret;
>>>> + int i, ret;
>>>> u32 reg;
>>>> switch (dwc->current_dr_role) {
>>>> @@ -2012,17 +2182,21 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
>>>> break;
>>>> }
>>>> /* Restore GUSB2PHYCFG bits that were modified in suspend */
>>>> - reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
>>>> - if (dwc->dis_u2_susphy_quirk)
>>>> - reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
>>>> + for (i = 0; i < dwc->num_usb2_phy; i++) {
>>>> + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
>>>> + if (dwc->dis_u2_susphy_quirk)
>>>> + reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
>>>> - if (dwc->dis_enblslpm_quirk)
>>>> - reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
>>>> + if (dwc->dis_enblslpm_quirk)
>>>> + reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
>>>> - dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
>>>> + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
>>>> + }
>>>> - phy_pm_runtime_get_sync(dwc->usb2_generic_phy);
>>>> - phy_pm_runtime_get_sync(dwc->usb3_generic_phy);
>>>> + for (i = 0; i < dwc->num_usb2_phy; i++)
>>>> + phy_pm_runtime_get_sync(dwc->usb2_generic_phy[i]);
>>>> + for (i = 0; i < dwc->num_usb3_phy; i++)
>>>> + phy_pm_runtime_get_sync(dwc->usb3_generic_phy[i]);
>>>> break;
>>>> case DWC3_GCTL_PRTCAP_OTG:
>>>> /* nothing to do on runtime_resume */
>>>> diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
>>>> index 81c486b..c169bf1 100644
>>>> --- a/drivers/usb/dwc3/core.h
>>>> +++ b/drivers/usb/dwc3/core.h
>>>> @@ -1020,6 +1020,8 @@ struct dwc3_scratchpad_array {
>>>> * @usb_psy: pointer to power supply interface.
>>>> * @usb2_phy: pointer to USB2 PHY
>>>> * @usb3_phy: pointer to USB3 PHY
>>>> + * @num_usb2_phy: Number of HS ports controlled by the core
>>>> + * @num_dsphy: Number of SS ports controlled by the core
>>> s/num_dsphy/num_usb3_phy/
>> Done
>>>> * @usb2_generic_phy: pointer to USB2 PHY
>>>> * @usb3_generic_phy: pointer to USB3 PHY
>>>> * @phys_ready: flag to indicate that PHYs are ready
>>>> @@ -1147,11 +1149,13 @@ struct dwc3 {
>>>> struct reset_control *reset;
>>>> - struct usb_phy *usb2_phy;
>>>> - struct usb_phy *usb3_phy;
>>>> + struct usb_phy **usb2_phy;
>>>> + struct usb_phy **usb3_phy;
>>>> + u32 num_usb2_phy;
>>>> + u32 num_usb3_phy;
>>>> - struct phy *usb2_generic_phy;
>>>> - struct phy *usb3_generic_phy;
>>>> + struct phy **usb2_generic_phy;
>>>> + struct phy **usb3_generic_phy;
>>>> bool phys_ready;
>>>> diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
>>>> index 039bf24..404643f 100644
>>>> --- a/drivers/usb/dwc3/drd.c
>>>> +++ b/drivers/usb/dwc3/drd.c
>>>> @@ -384,10 +384,10 @@ void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
>>>> if (ret) {
>>>> dev_err(dwc->dev, "failed to initialize host\n");
>>>> } else {
>>>> - if (dwc->usb2_phy)
>>>> - otg_set_vbus(dwc->usb2_phy->otg, true);
>>>> - if (dwc->usb2_generic_phy)
>>>> - phy_set_mode(dwc->usb2_generic_phy,
>>>> + if (dwc->usb2_phy[0])
>>>> + otg_set_vbus(dwc->usb2_phy[0]->otg, true);
>>>> + if (dwc->usb2_generic_phy[0])
>>>> + phy_set_mode(dwc->usb2_generic_phy[0],
>>>> PHY_MODE_USB_HOST);
>>>> }
>>>> break;
>>>> @@ -398,10 +398,10 @@ void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
>>>> dwc3_event_buffers_setup(dwc);
>>>> spin_unlock_irqrestore(&dwc->lock, flags);
>>>> - if (dwc->usb2_phy)
>>>> - otg_set_vbus(dwc->usb2_phy->otg, false);
>>>> - if (dwc->usb2_generic_phy)
>>>> - phy_set_mode(dwc->usb2_generic_phy,
>>>> + if (dwc->usb2_phy[0])
>>>> + otg_set_vbus(dwc->usb2_phy[0]->otg, false);
>>>> + if (dwc->usb2_generic_phy[0])
>>>> + phy_set_mode(dwc->usb2_generic_phy[0],
>>>> PHY_MODE_USB_DEVICE);
>>>> ret = dwc3_gadget_init(dwc);
>>>> if (ret)
>>>> diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
>>>> index 00427d1..e3b2a17 100644
>>>> --- a/drivers/usb/dwc3/gadget.c
>>>> +++ b/drivers/usb/dwc3/gadget.c
>>>> @@ -2872,8 +2872,8 @@ static int dwc3_gadget_vbus_draw(struct usb_gadget *g, unsigned int mA)
>>>> union power_supply_propval val = {0};
>>>> int ret;
>>>> - if (dwc->usb2_phy)
>>>> - return usb_phy_set_power(dwc->usb2_phy, mA);
>>>> + if (dwc->usb2_phy[0])
>>>> + return usb_phy_set_power(dwc->usb2_phy[0], mA);
>>>> if (!dwc->usb_psy)
>>>> return -EOPNOTSUPP;
>>>> --
>>>> 2.7.4
>>>>
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