Hi,
On Sat, 2017-01-21 at 14:11 -0600, Rob Herring wrote:
> On Wed, Jan 18, 2017 at 02:08:27PM +0800, Chunfeng Yun wrote:
> > add a reference clock for compatibility
>
> Why? This block suddenly has 2 clocks instead of 1?
In fact, there is a reference clock which comes from 26M oscillator
directly. I ignore it because it is a fixed-clock in DTS, and always
turned on for mt8173. But later, I find that I made a mistake before
when I bring up it on a new platform whose reference clock comes from
PLL, and need control it. So here add it, no matter it is a fixed-clock
or not.
>
> >
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
> > ---
> > .../devicetree/bindings/usb/mt8173-mtu3.txt | 10 +++++-----
> > 1 file changed, 5 insertions(+), 5 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/usb/mt8173-mtu3.txt b/Documentation/devicetree/bindings/usb/mt8173-mtu3.txt
> > index e049d19..8c976cd 100644
> > --- a/Documentation/devicetree/bindings/usb/mt8173-mtu3.txt
> > +++ b/Documentation/devicetree/bindings/usb/mt8173-mtu3.txt
> > @@ -10,7 +10,7 @@ Required properties:
> > - vusb33-supply : regulator of USB avdd3.3v
> > - clocks : a list of phandle + clock-specifier pairs, one for each
> > entry in clock-names
> > - - clock-names : must contain "sys_ck" for clock of controller;
> > + - clock-names : must contain "sys_ck" and "ref_ck" for clock of controller;
> > "wakeup_deb_p0" and "wakeup_deb_p1" are optional, they are
> > depends on "mediatek,enable-wakeup"
> > - phys : a list of phandle + phy specifier pairs
> > @@ -56,10 +56,10 @@ ssusb: usb@11271000 {
> > phys = <&phy_port0 PHY_TYPE_USB3>,
> > <&phy_port1 PHY_TYPE_USB2>;
> > power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
> > - clocks = <&topckgen CLK_TOP_USB30_SEL>,
> > + clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>,
> > <&pericfg CLK_PERI_USB0>,
> > <&pericfg CLK_PERI_USB1>;
> > - clock-names = "sys_ck",
> > + clock-names = "sys_ck", "ref_ck",
> > "wakeup_deb_p0",
> > "wakeup_deb_p1";
> > vusb33-supply = <&mt6397_vusb_reg>;
> > @@ -79,8 +79,8 @@ ssusb: usb@11271000 {
> > reg-names = "mac";
> > interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
> > power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
> > - clocks = <&topckgen CLK_TOP_USB30_SEL>;
> > - clock-names = "sys_ck";
> > + clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>;
> > + clock-names = "sys_ck", "ref_ck";
> > vusb33-supply = <&mt6397_vusb_reg>;
> > status = "disabled";
> > };
> > --
> > 1.7.9.5
> >
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