* [PATCH 1/3] dt-bindings: usb: renesas,usbhs: Support external ref clock @ 2021-06-30 17:30 Adam Ford 2021-06-30 17:30 ` [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks Adam Ford ` (2 more replies) 0 siblings, 3 replies; 8+ messages in thread From: Adam Ford @ 2021-06-30 17:30 UTC (permalink / raw) To: linux-usb Cc: aford, Adam Ford, Greg Kroah-Hartman, Rob Herring, Geert Uytterhoeven, Magnus Damm, Yoshihiro Shimoda, devicetree, linux-kernel, linux-renesas-soc The usbhs driver expects a fixed external reference clock, but it could be sourced from a programmable clock instead of a fixed clock. Add support for an optional 4th reference clock. Signed-off-by: Adam Ford <aford173@gmail.com> diff --git a/Documentation/devicetree/bindings/usb/renesas,usbhs.yaml b/Documentation/devicetree/bindings/usb/renesas,usbhs.yaml index e67223d90bb7..2372d8c42979 100644 --- a/Documentation/devicetree/bindings/usb/renesas,usbhs.yaml +++ b/Documentation/devicetree/bindings/usb/renesas,usbhs.yaml @@ -53,11 +53,12 @@ properties: clocks: minItems: 1 - maxItems: 3 + maxItems: 4 items: - description: USB 2.0 host - description: USB 2.0 peripheral - description: USB 2.0 clock selector + - description: Optional external reference clock interrupts: maxItems: 1 -- 2.25.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks 2021-06-30 17:30 [PATCH 1/3] dt-bindings: usb: renesas,usbhs: Support external ref clock Adam Ford @ 2021-06-30 17:30 ` Adam Ford 2021-07-01 9:07 ` Geert Uytterhoeven 2021-06-30 17:30 ` [PATCH 3/3] arm64: dts: renesas: beacon: Fix HSUSB ref clock references Adam Ford 2021-07-14 21:27 ` [PATCH 1/3] dt-bindings: usb: renesas,usbhs: Support external ref clock Rob Herring 2 siblings, 1 reply; 8+ messages in thread From: Adam Ford @ 2021-06-30 17:30 UTC (permalink / raw) To: linux-usb Cc: aford, Adam Ford, Greg Kroah-Hartman, Rob Herring, Geert Uytterhoeven, Magnus Damm, Yoshihiro Shimoda, devicetree, linux-kernel, linux-renesas-soc The RZ/G2 boards expect there to be an external clock reference for USBHS controller, but this could be set by a programmable clock. For those devices using a programmable clock, there need to be two additional clocks beyond the internal reference clocks: rcar-usb2-clock-sel to specify we using an external clock, and the external reference clock itself. Make this driver dynamically enable all the clocks assigned to it instead of only enabling the first one or two clocks. Signed-off-by: Adam Ford <aford173@gmail.com> diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c index 3af91b2b8f76..255e4bd68ed3 100644 --- a/drivers/usb/renesas_usbhs/common.c +++ b/drivers/usb/renesas_usbhs/common.c @@ -297,6 +297,8 @@ static bool usbhsc_is_multi_clks(struct usbhs_priv *priv) static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) { + unsigned int i; + if (!usbhsc_is_multi_clks(priv)) return 0; @@ -309,11 +311,13 @@ static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) * To backward compatibility with old DT, this driver checks the return * value if it's -ENOENT or not. */ - priv->clks[1] = of_clk_get(dev_of_node(dev), 1); - if (PTR_ERR(priv->clks[1]) == -ENOENT) - priv->clks[1] = NULL; - else if (IS_ERR(priv->clks[1])) - return PTR_ERR(priv->clks[1]); + for (i = 1; i < ARRAY_SIZE(priv->clks); i++) { + priv->clks[1] = of_clk_get(dev->of_node, i); + if (PTR_ERR(priv->clks[i]) == -ENOENT) + priv->clks[i] = NULL; + else if (IS_ERR(priv->clks[i])) + return PTR_ERR(priv->clks[i]); + } return 0; } -- 2.25.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks 2021-06-30 17:30 ` [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks Adam Ford @ 2021-07-01 9:07 ` Geert Uytterhoeven 2021-07-01 11:34 ` Yoshihiro Shimoda 0 siblings, 1 reply; 8+ messages in thread From: Geert Uytterhoeven @ 2021-07-01 9:07 UTC (permalink / raw) To: Adam Ford Cc: USB list, Adam Ford-BE, Greg Kroah-Hartman, Rob Herring, Magnus Damm, Yoshihiro Shimoda, open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS, Linux Kernel Mailing List, Linux-Renesas Hi Adam, Thanks for your patch! On Wed, Jun 30, 2021 at 7:30 PM Adam Ford <aford173@gmail.com> wrote: > The RZ/G2 boards expect there to be an external clock reference for > USBHS controller, but this could be set by a programmable clock. > For those devices using a programmable clock, there need to be two > additional clocks beyond the internal reference clocks: > > rcar-usb2-clock-sel to specify we using an external clock, and > the external reference clock itself. Something is missing in the above sentence? > > Make this driver dynamically enable all the clocks assigned to it > instead of only enabling the first one or two clocks. > > Signed-off-by: Adam Ford <aford173@gmail.com> > > diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c > index 3af91b2b8f76..255e4bd68ed3 100644 > --- a/drivers/usb/renesas_usbhs/common.c > +++ b/drivers/usb/renesas_usbhs/common.c > @@ -297,6 +297,8 @@ static bool usbhsc_is_multi_clks(struct usbhs_priv *priv) > > static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) > { > + unsigned int i; > + > if (!usbhsc_is_multi_clks(priv)) > return 0; > > @@ -309,11 +311,13 @@ static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) > * To backward compatibility with old DT, this driver checks the return > * value if it's -ENOENT or not. > */ > - priv->clks[1] = of_clk_get(dev_of_node(dev), 1); > - if (PTR_ERR(priv->clks[1]) == -ENOENT) > - priv->clks[1] = NULL; > - else if (IS_ERR(priv->clks[1])) > - return PTR_ERR(priv->clks[1]); > + for (i = 1; i < ARRAY_SIZE(priv->clks); i++) { > + priv->clks[1] = of_clk_get(dev->of_node, i); > + if (PTR_ERR(priv->clks[i]) == -ENOENT) > + priv->clks[i] = NULL; > + else if (IS_ERR(priv->clks[i])) > + return PTR_ERR(priv->clks[i]); > + } This is identical to the current code, as ARRAY_SIZE(priv->clks) == 2. Probably you wanted to increase usbhs_priv.clks[], too? Does it make sense to start using the clk_bulk*() API? > > return 0; > } Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds ^ permalink raw reply [flat|nested] 8+ messages in thread
* RE: [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks 2021-07-01 9:07 ` Geert Uytterhoeven @ 2021-07-01 11:34 ` Yoshihiro Shimoda 2021-08-27 18:57 ` Adam Ford 0 siblings, 1 reply; 8+ messages in thread From: Yoshihiro Shimoda @ 2021-07-01 11:34 UTC (permalink / raw) To: Geert Uytterhoeven, Adam Ford Cc: USB list, Adam Ford-BE, Greg Kroah-Hartman, Rob Herring, Magnus Damm, open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS, Linux Kernel Mailing List, Linux-Renesas Hi Adam, Geert-san, > From: Geert Uytterhoeven, Sent: Thursday, July 1, 2021 6:07 PM <snip> > To: Adam Ford <aford173@gmail.com> > Cc: USB list <linux-usb@vger.kernel.org>; Adam Ford-BE <aford@beaconembedded.com>; Greg Kroah-Hartman > <gregkh@linuxfoundation.org>; Rob Herring <robh+dt@kernel.org>; Magnus Damm <magnus.damm@gmail.com>; Yoshihiro Shimoda > <yoshihiro.shimoda.uh@renesas.com>; open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS > <devicetree@vger.kernel.org>; Linux Kernel Mailing List <linux-kernel@vger.kernel.org>; Linux-Renesas > <linux-renesas-soc@vger.kernel.org> > Subject: Re: [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks > > Hi Adam, > > Thanks for your patch! > > On Wed, Jun 30, 2021 at 7:30 PM Adam Ford wrote: <snip> > > diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c > > index 3af91b2b8f76..255e4bd68ed3 100644 > > --- a/drivers/usb/renesas_usbhs/common.c > > +++ b/drivers/usb/renesas_usbhs/common.c <snip> > > @@ -309,11 +311,13 @@ static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) > > * To backward compatibility with old DT, this driver checks the return > > * value if it's -ENOENT or not. > > */ > > - priv->clks[1] = of_clk_get(dev_of_node(dev), 1); > > - if (PTR_ERR(priv->clks[1]) == -ENOENT) > > - priv->clks[1] = NULL; > > - else if (IS_ERR(priv->clks[1])) > > - return PTR_ERR(priv->clks[1]); > > + for (i = 1; i < ARRAY_SIZE(priv->clks); i++) { > > + priv->clks[1] = of_clk_get(dev->of_node, i); s/clks[1]/[i]/ > > + if (PTR_ERR(priv->clks[i]) == -ENOENT) > > + priv->clks[i] = NULL; > > + else if (IS_ERR(priv->clks[i])) > > + return PTR_ERR(priv->clks[i]); > > + } > > This is identical to the current code, as ARRAY_SIZE(priv->clks) == 2. > Probably you wanted to increase usbhs_priv.clks[], too? I think so. # I realized the clks array is only 2, so that this driver cannot # enable usb2_clksel... > Does it make sense to start using the clk_bulk*() API? clk_bulk*() API seems to need clock-names property. Is my understanding correct? However, the hsusb nodes doesn't have the property for now... Best regards, Yoshihiro Shimoda ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks 2021-07-01 11:34 ` Yoshihiro Shimoda @ 2021-08-27 18:57 ` Adam Ford 2021-08-30 5:32 ` Yoshihiro Shimoda 0 siblings, 1 reply; 8+ messages in thread From: Adam Ford @ 2021-08-27 18:57 UTC (permalink / raw) To: Yoshihiro Shimoda Cc: Geert Uytterhoeven, USB list, Adam Ford-BE, Greg Kroah-Hartman, Rob Herring, Magnus Damm, open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS, Linux Kernel Mailing List, Linux-Renesas On Thu, Jul 1, 2021 at 6:34 AM Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> wrote: > > Hi Adam, Geert-san, > > > From: Geert Uytterhoeven, Sent: Thursday, July 1, 2021 6:07 PM > <snip> > > To: Adam Ford <aford173@gmail.com> > > Cc: USB list <linux-usb@vger.kernel.org>; Adam Ford-BE <aford@beaconembedded.com>; Greg Kroah-Hartman > > <gregkh@linuxfoundation.org>; Rob Herring <robh+dt@kernel.org>; Magnus Damm <magnus.damm@gmail.com>; Yoshihiro Shimoda > > <yoshihiro.shimoda.uh@renesas.com>; open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS > > <devicetree@vger.kernel.org>; Linux Kernel Mailing List <linux-kernel@vger.kernel.org>; Linux-Renesas > > <linux-renesas-soc@vger.kernel.org> > > Subject: Re: [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks > > > > Hi Adam, > > > > Thanks for your patch! > > > > On Wed, Jun 30, 2021 at 7:30 PM Adam Ford wrote: > <snip> > > > diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c > > > index 3af91b2b8f76..255e4bd68ed3 100644 > > > --- a/drivers/usb/renesas_usbhs/common.c > > > +++ b/drivers/usb/renesas_usbhs/common.c > <snip> > > > @@ -309,11 +311,13 @@ static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) > > > * To backward compatibility with old DT, this driver checks the return > > > * value if it's -ENOENT or not. > > > */ > > > - priv->clks[1] = of_clk_get(dev_of_node(dev), 1); > > > - if (PTR_ERR(priv->clks[1]) == -ENOENT) > > > - priv->clks[1] = NULL; > > > - else if (IS_ERR(priv->clks[1])) > > > - return PTR_ERR(priv->clks[1]); > > > + for (i = 1; i < ARRAY_SIZE(priv->clks); i++) { > > > + priv->clks[1] = of_clk_get(dev->of_node, i); > > s/clks[1]/[i]/ > > > > + if (PTR_ERR(priv->clks[i]) == -ENOENT) > > > + priv->clks[i] = NULL; > > > + else if (IS_ERR(priv->clks[i])) > > > + return PTR_ERR(priv->clks[i]); > > > + } > > > > This is identical to the current code, as ARRAY_SIZE(priv->clks) == 2. > > Probably you wanted to increase usbhs_priv.clks[], too? Thanks for the review. Sorry for my delayed response. I broke my wrist on the evening on June 30, and I was on medical leave for 6 weeks. I am now trying to get caught up to where I was. > > I think so. > # I realized the clks array is only 2, so that this driver cannot > # enable usb2_clksel... > > > Does it make sense to start using the clk_bulk*() API? > > clk_bulk*() API seems to need clock-names property. > Is my understanding correct? However, the hsusb nodes doesn't > have the property for now... The usb2_clksel has the names "ehci_ohci" and "hs-usb-if" for <&cpg CPG_MOD 703> and <&cpg CPG_MOD 704>, respectively. What if I add the clock-names property, then switch to the clk_bulk IO? I think we can just turn them all on together if that's acceptable adam > > Best regards, > Yoshihiro Shimoda > ^ permalink raw reply [flat|nested] 8+ messages in thread
* RE: [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks 2021-08-27 18:57 ` Adam Ford @ 2021-08-30 5:32 ` Yoshihiro Shimoda 0 siblings, 0 replies; 8+ messages in thread From: Yoshihiro Shimoda @ 2021-08-30 5:32 UTC (permalink / raw) To: Adam Ford Cc: Geert Uytterhoeven, USB list, Adam Ford-BE, Greg Kroah-Hartman, Rob Herring, Magnus Damm, open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS, Linux Kernel Mailing List, Linux-Renesas Hi Adam, > From: Adam Ford, Sent: Saturday, August 28, 2021 3:58 AM > > On Thu, Jul 1, 2021 at 6:34 AM Yoshihiro Shimoda wrote: > > > > Hi Adam, Geert-san, > > > > > From: Geert Uytterhoeven, Sent: Thursday, July 1, 2021 6:07 PM > > > > > > Hi Adam, > > > > > > Thanks for your patch! > > > > > > On Wed, Jun 30, 2021 at 7:30 PM Adam Ford wrote: > > <snip> > > > > diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c > > > > index 3af91b2b8f76..255e4bd68ed3 100644 > > > > --- a/drivers/usb/renesas_usbhs/common.c > > > > +++ b/drivers/usb/renesas_usbhs/common.c > > <snip> > > > > @@ -309,11 +311,13 @@ static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) > > > > * To backward compatibility with old DT, this driver checks the return > > > > * value if it's -ENOENT or not. > > > > */ > > > > - priv->clks[1] = of_clk_get(dev_of_node(dev), 1); > > > > - if (PTR_ERR(priv->clks[1]) == -ENOENT) > > > > - priv->clks[1] = NULL; > > > > - else if (IS_ERR(priv->clks[1])) > > > > - return PTR_ERR(priv->clks[1]); > > > > + for (i = 1; i < ARRAY_SIZE(priv->clks); i++) { > > > > + priv->clks[1] = of_clk_get(dev->of_node, i); > > > > s/clks[1]/[i]/ > > > > > > + if (PTR_ERR(priv->clks[i]) == -ENOENT) > > > > + priv->clks[i] = NULL; > > > > + else if (IS_ERR(priv->clks[i])) > > > > + return PTR_ERR(priv->clks[i]); > > > > + } > > > > > > This is identical to the current code, as ARRAY_SIZE(priv->clks) == 2. > > > Probably you wanted to increase usbhs_priv.clks[], too? > > Thanks for the review. Sorry for my delayed response. I broke my > wrist on the evening on June 30, and I was on medical leave for 6 > weeks. I am now trying to get caught up to where I was. I'm sorry to hear that. I hope you recover soon. > > > > I think so. > > # I realized the clks array is only 2, so that this driver cannot > > # enable usb2_clksel... > > > > > Does it make sense to start using the clk_bulk*() API? > > > > clk_bulk*() API seems to need clock-names property. > > Is my understanding correct? However, the hsusb nodes doesn't > > have the property for now... > > The usb2_clksel has the names "ehci_ohci" and "hs-usb-if" for <&cpg > CPG_MOD 703> and <&cpg CPG_MOD 704>, respectively. > > What if I add the clock-names property, then switch to the clk_bulk > IO? I think we can just turn them all on together if that's > acceptable According to an article [1], ===================================================== forward and backward dts compatibility Current practice is that * new kernels work with old devicetrees * old kernels may or may not work with new devicetrees ===================================================== [1] https://elinux.org/Device_Tree_Linux#forward_and_backward_dts_compatibility So, IIUC, we have to modify binding doc, dts/dtsi files and the driver code step-by-step to achieve the compatibility. 1) Modify binding doc to add clock-names. 2) Modify the renesas_usbhs driver to check clock-names. 3) Modify all dts/dtsi files to add clock-names. We can make "1) and 2)" patches, and "3)" patch in parallel. And, the 2) should take care of forward and backword dts compatibility, IIUC. Best regards, Yoshihiro Shimoda ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 3/3] arm64: dts: renesas: beacon: Fix HSUSB ref clock references 2021-06-30 17:30 [PATCH 1/3] dt-bindings: usb: renesas,usbhs: Support external ref clock Adam Ford 2021-06-30 17:30 ` [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks Adam Ford @ 2021-06-30 17:30 ` Adam Ford 2021-07-14 21:27 ` [PATCH 1/3] dt-bindings: usb: renesas,usbhs: Support external ref clock Rob Herring 2 siblings, 0 replies; 8+ messages in thread From: Adam Ford @ 2021-06-30 17:30 UTC (permalink / raw) To: linux-usb Cc: aford, Adam Ford, Greg Kroah-Hartman, Rob Herring, Geert Uytterhoeven, Magnus Damm, Yoshihiro Shimoda, devicetree, linux-kernel, linux-renesas-soc The RZ/G2 boards expect there to be an external clock reference for USBHS controller. For the Beacon boards, this reference clock is controlled by a programmable versaclock. Because the RZ/G2 family has a special clock driver when using an external clock, the third clock reference in the USBHS node needs to point to this special clock, called usb2_clksel, and the 4th clock is the versaclock. Signed-off-by: Adam Ford <aford173@gmail.com> diff --git a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi index e3c8b2fe143e..bcbf7eb5195b 100644 --- a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi +++ b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi @@ -313,6 +313,7 @@ &hscif1 { }; &hsusb { + clocks = <&cpg CPG_MOD 704>, <&cpg CPG_MOD 703>, <&usb2_clksel>, <&versaclock6_som 3>; dr_mode = "otg"; status = "okay"; }; -- 2.25.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 1/3] dt-bindings: usb: renesas,usbhs: Support external ref clock 2021-06-30 17:30 [PATCH 1/3] dt-bindings: usb: renesas,usbhs: Support external ref clock Adam Ford 2021-06-30 17:30 ` [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks Adam Ford 2021-06-30 17:30 ` [PATCH 3/3] arm64: dts: renesas: beacon: Fix HSUSB ref clock references Adam Ford @ 2021-07-14 21:27 ` Rob Herring 2 siblings, 0 replies; 8+ messages in thread From: Rob Herring @ 2021-07-14 21:27 UTC (permalink / raw) To: Adam Ford Cc: linux-usb, aford, Greg Kroah-Hartman, Geert Uytterhoeven, Magnus Damm, Yoshihiro Shimoda, devicetree, linux-kernel, linux-renesas-soc On Wed, Jun 30, 2021 at 12:30:40PM -0500, Adam Ford wrote: > The usbhs driver expects a fixed external reference clock, but it > could be sourced from a programmable clock instead of a fixed clock. > Add support for an optional 4th reference clock. > > Signed-off-by: Adam Ford <aford173@gmail.com> > > diff --git a/Documentation/devicetree/bindings/usb/renesas,usbhs.yaml b/Documentation/devicetree/bindings/usb/renesas,usbhs.yaml > index e67223d90bb7..2372d8c42979 100644 > --- a/Documentation/devicetree/bindings/usb/renesas,usbhs.yaml > +++ b/Documentation/devicetree/bindings/usb/renesas,usbhs.yaml > @@ -53,11 +53,12 @@ properties: > > clocks: > minItems: 1 > - maxItems: 3 > + maxItems: 4 You won't need this in v5.14-rc1. These are implied by 'items' length if not specified. > items: > - description: USB 2.0 host > - description: USB 2.0 peripheral > - description: USB 2.0 clock selector > + - description: Optional external reference clock > > interrupts: > maxItems: 1 > -- > 2.25.1 > > ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2021-08-30 5:32 UTC | newest] Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-06-30 17:30 [PATCH 1/3] dt-bindings: usb: renesas,usbhs: Support external ref clock Adam Ford 2021-06-30 17:30 ` [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks Adam Ford 2021-07-01 9:07 ` Geert Uytterhoeven 2021-07-01 11:34 ` Yoshihiro Shimoda 2021-08-27 18:57 ` Adam Ford 2021-08-30 5:32 ` Yoshihiro Shimoda 2021-06-30 17:30 ` [PATCH 3/3] arm64: dts: renesas: beacon: Fix HSUSB ref clock references Adam Ford 2021-07-14 21:27 ` [PATCH 1/3] dt-bindings: usb: renesas,usbhs: Support external ref clock Rob Herring
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