Re: [PATCH 3/3] usb: phy: mxs: remove CONFIG_USB_OTG condition for mxs_phy_is_otg_host()

Re: [PATCH 3/3] usb: phy: mxs: remove CONFIG_USB_OTG condition for mxs_phy_is_otg_host()

[Fabio Estevam]

On Thu, Dec 14, 2023 at 8:20 AM Xu Yang <xu.yang_2@nxp.com> wrote:
>
> When CONFIG_USB_OTG is not set, mxs_phy_is_otg_host() will always return
> false. This behaviour is wrong. Since phy.last_event will always be set
> for either host or device mode. Therefore, CONFIG_USB_OTG condition
> can be removed.
>
> Signed-off-by: Xu Yang <xu.yang_2@nxp.com>

Fixes tag?

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[PATCH 1/3] usb: chipidea: ci_hdrc_imx: add wakeup clock and keep it always on

[Xu Yang]

Some platform using ChipIdea IP  may keep 32KHz wakeup clock always
on without usb driver intervention. And some may need driver to handle
this clock. This patch will get wakeup clock and keep it always on to
make controller work correctlly.

Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
---
 drivers/usb/chipidea/ci_hdrc_imx.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index e28bb2f2612d..4330be8240ff 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -96,6 +96,7 @@ struct ci_hdrc_imx_data {
 	struct usb_phy *phy;
 	struct platform_device *ci_pdev;
 	struct clk *clk;
+	struct clk *clk_wakeup;
 	struct imx_usbmisc_data *usbmisc_data;
 	bool supports_runtime_pm;
 	bool override_phy_control;
@@ -199,7 +200,7 @@ static int imx_get_clks(struct device *dev)
 
 	data->clk_ipg = devm_clk_get(dev, "ipg");
 	if (IS_ERR(data->clk_ipg)) {
-		/* If the platform only needs one clocks */
+		/* If the platform only needs one primary clock */
 		data->clk = devm_clk_get(dev, NULL);
 		if (IS_ERR(data->clk)) {
 			ret = PTR_ERR(data->clk);
@@ -208,6 +209,18 @@ static int imx_get_clks(struct device *dev)
 				PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
 			return ret;
 		}
+		/* Get wakeup clock. Not all of the platforms need to
+		 * handle this clock. So make it optional.
+		 */
+		data->clk_wakeup = devm_clk_get_optional(dev,
+							 "usb_wakeup_clk");
+		if (IS_ERR(data->clk_wakeup)) {
+			ret = PTR_ERR(data->clk_wakeup);
+			dev_err(dev,
+				"Failed to get wakeup clk, err=%ld\n",
+				PTR_ERR(data->clk_wakeup));
+			return ret;
+		}
 		return ret;
 	}
 
@@ -423,6 +436,10 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
 	if (ret)
 		goto disable_hsic_regulator;
 
+	ret = clk_prepare_enable(data->clk_wakeup);
+	if (ret)
+		goto err_wakeup_clk;
+
 	data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
 	if (IS_ERR(data->phy)) {
 		ret = PTR_ERR(data->phy);
@@ -504,6 +521,8 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
 disable_device:
 	ci_hdrc_remove_device(data->ci_pdev);
 err_clk:
+	clk_disable_unprepare(data->clk_wakeup);
+err_wakeup_clk:
 	imx_disable_unprepare_clks(dev);
 disable_hsic_regulator:
 	if (data->hsic_pad_regulator)
@@ -530,6 +549,7 @@ static void ci_hdrc_imx_remove(struct platform_device *pdev)
 		usb_phy_shutdown(data->phy);
 	if (data->ci_pdev) {
 		imx_disable_unprepare_clks(&pdev->dev);
+		clk_disable_unprepare(data->clk_wakeup);
 		if (data->plat_data->flags & CI_HDRC_PMQOS)
 			cpu_latency_qos_remove_request(&data->pm_qos_req);
 		if (data->hsic_pad_regulator)
-- 
2.34.1


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[PATCH 2/3] usb: chipidea: wait controller resume finished for wakeup irq

[Xu Yang]

After the chipidea driver introduce extcon for id and vbus, it's able
to wakeup from another irq source, in case the system with extcon ID
cable, wakeup from usb ID cable and device removal, the usb device
disconnect irq may come firstly before the extcon notifier while system
resume, so we will get 2 "wakeup" irq, one for usb device disconnect;
and one for extcon ID cable change(real wakeup event), current driver
treat them as 2 successive wakeup irq so can't handle it correctly, then
finally the usb irq can't be enabled. This patch adds a check to bypass
further usb events before controller resume finished to fix it.

Fixes: 1f874edcb731 ("usb: chipidea: add runtime power management support")
cc: <stable@vger.kernel.org>
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>
---
 drivers/usb/chipidea/core.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 7ac39a281b8c..85e9c3ab66e9 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -523,6 +523,13 @@ static irqreturn_t ci_irq_handler(int irq, void *data)
 	u32 otgsc = 0;
 
 	if (ci->in_lpm) {
+		/*
+		 * If we already have a wakeup irq pending there,
+		 * let's just return to wait resume finished firstly.
+		 */
+		if (ci->wakeup_int)
+			return IRQ_HANDLED;
+
 		disable_irq_nosync(irq);
 		ci->wakeup_int = true;
 		pm_runtime_get(ci->dev);
-- 
2.34.1


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[PATCH 3/3] usb: phy: mxs: remove CONFIG_USB_OTG condition for mxs_phy_is_otg_host()

[Xu Yang]

When CONFIG_USB_OTG is not set, mxs_phy_is_otg_host() will always return
false. This behaviour is wrong. Since phy.last_event will always be set
for either host or device mode. Therefore, CONFIG_USB_OTG condition
can be removed.

Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
---
 drivers/usb/phy/phy-mxs-usb.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c
index acd46b72899e..920a32cd094d 100644
--- a/drivers/usb/phy/phy-mxs-usb.c
+++ b/drivers/usb/phy/phy-mxs-usb.c
@@ -388,8 +388,7 @@ static void __mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool disconnect)
 
 static bool mxs_phy_is_otg_host(struct mxs_phy *mxs_phy)
 {
-	return IS_ENABLED(CONFIG_USB_OTG) &&
-		mxs_phy->phy.last_event == USB_EVENT_ID;
+	return mxs_phy->phy.last_event == USB_EVENT_ID;
 }
 
 static void mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool on)
-- 
2.34.1


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Re: [PATCH 1/3] usb: chipidea: ci_hdrc_imx: add wakeup clock and keep it always on

[Greg KH]

On Thu, Dec 14, 2023 at 07:26:20PM +0800, Xu Yang wrote:
> Some platform using ChipIdea IP  may keep 32KHz wakeup clock always
> on without usb driver intervention. And some may need driver to handle
> this clock. This patch will get wakeup clock and keep it always on to
> make controller work correctlly.
> 
> Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
> ---
>  drivers/usb/chipidea/ci_hdrc_imx.c | 22 +++++++++++++++++++++-
>  1 file changed, 21 insertions(+), 1 deletion(-)
> 

Why do I have 2 different copies of this series?  Please fix up and send
a v2 and describe what changed...

thanks,

greg k-h

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RE: [EXT] Re: [PATCH 1/3] usb: chipidea: ci_hdrc_imx: add wakeup clock and keep it always on

[Xu Yang]

Hi Greg,

> 
> On Thu, Dec 14, 2023 at 07:26:20PM +0800, Xu Yang wrote:
> > Some platform using ChipIdea IP  may keep 32KHz wakeup clock always
> > on without usb driver intervention. And some may need driver to handle
> > this clock. This patch will get wakeup clock and keep it always on to
> > make controller work correctlly.
> >
> > Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
> > ---
> >  drivers/usb/chipidea/ci_hdrc_imx.c | 22 +++++++++++++++++++++-
> >  1 file changed, 21 insertions(+), 1 deletion(-)
> >
> 
> Why do I have 2 different copies of this series?  Please fix up and send
> a v2 and describe what changed...

Sorry for this, I forgot to add some maillists. I should add RESEND in the title.
Will send v2 later.

Thanks,
Xu Yang

> 
> thanks,
> 
> greg k-h

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RE: [EXT] Re: [PATCH 3/3] usb: phy: mxs: remove CONFIG_USB_OTG condition for mxs_phy_is_otg_host()

[Xu Yang]

Hi Fabio,

> 
> On Thu, Dec 14, 2023 at 8:20 AM Xu Yang <xu.yang_2@nxp.com> wrote:
> >
> > When CONFIG_USB_OTG is not set, mxs_phy_is_otg_host() will always return
> > false. This behaviour is wrong. Since phy.last_event will always be set
> > for either host or device mode. Therefore, CONFIG_USB_OTG condition
> > can be removed.
> >
> > Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
> 
> Fixes tag?

Sorry, will add tag in v2.
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