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Date: Thu, 6 Mar 2014 15:12:09 +0200
From: Roger Quadros <rogerq@...com>
To: George Cherian <george.cherian@...com>,
<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-doc@...r.kernel.org>, <devicetree@...r.kernel.org>
CC: <anatol.pomozov@...il.com>, <gregkh@...uxfoundation.org>,
<balbi@...com>, <kishon@...com>, <rob@...dley.net>,
<galak@...eaurora.org>, <ijc+devicetree@...lion.org.uk>,
<mark.rutland@....com>, <pawel.moll@....com>, <robh+dt@...nel.org>,
<bcousson@...libre.com>, <tony@...mide.com>
Subject: Re: [PATCH 2/5] ARM: dts: AM4372: Add USB nodes
On 03/06/2014 02:27 PM, George Cherian wrote:
> Hi Roger,
>
> On 3/6/2014 2:19 PM, Roger Quadros wrote:
>> Hi George,
>>
>> On 03/03/2014 03:53 PM, George Cherian wrote:
>>> Add nodes for 2 instances each of
>>> - ocp2scp
>>> - USB PHY control module
>>> - USB PHY
>>> - dwc3_omap
>>> - USB
>>>
>>> for AM43xx.
>>>
>>> Signed-off-by: George Cherian <george.cherian@...com>
>>> ---
>>> arch/arm/boot/dts/am4372.dtsi | 99 +++++++++++++++++++++++++++++++++++++++++++
>>> 1 file changed, 99 insertions(+)
>>>
>>> diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
>>> index 5a7cc38..90408b3 100644
>>> --- a/arch/arm/boot/dts/am4372.dtsi
>>> +++ b/arch/arm/boot/dts/am4372.dtsi
>>> @@ -698,6 +698,105 @@
>>> <&edma 11>;
>>> dma-names = "tx", "rx";
>>> };
>>> +
>>> + am43xx_control_usb2phy1: control-phy@...10620 {
>>> + compatible = "ti,control-phy-am437usb2";
>> Since this is the first usage of this compatible ID, we still have room to
>> change it to be better. Tony's suggestion was to use "ti,control-phy-am437-usb2"
>>
>> Please see
>> http://article.gmane.org/gmane.linux.drivers.devicetree/64833
>
> Okay.
>>> + reg = <0x44e10620 0x4>;
>>> + reg-names = "power";
>>> + status = "disabled";
>> Why disable something that is within the SoC and does not affect board configurations?
>>
>> Question applies for all the nodes in this patch except the ones that come out on the
>> SoC pins. e.g. PHY.
> Okay
>>> + };
>>> +
>>> + am43xx_control_usb2phy2: control-phy@...4e10628 {
>>> + compatible = "ti,control-phy-am437usb2";
>>> + reg = <0x44e10628 0x4>;
>>> + reg-names = "power";
>>> + status = "disabled";
>>> + };
>>> +
>>> + ocp2scp0: ocp2scp@...a8000 {
>>> + compatible = "ti,omap-ocp2scp";
>>> + #address-cells = <1>;
>>> + #size-cells = <1>;
>>> + ranges;
>>> + ti,hwmods = "ocp2scp0";
>>> + status = "disabled";
>>> +
>>> + usb2_phy1: usb2phy1@...a8000 {
>> should be
> okay
>> usb2_phy1: phy@...a8000 {
>>
>>> + compatible = "ti,am437x-usb2";
>>> + reg = <0x483a8000 0x8000>;
>>> + ctrl-module = <&am43xx_control_usb2phy1>;
>>> + clocks = <&clk_32768_ck>,
>>> + <&usb_otg_ss0_refclk960m>;
>>> + clock-names = "usb_phy_cm_clk32k",
>>> + "usb_otg_ss_refclk960m";
>> clock-names should be platform independent. Better option would be to
>> modify the usb2 driver to use names like "wkupclk" and "refclk"
> The phy driver still does devm_get_clk using above clock names and not "wkupclk" and "refclk".
>
I'll post a patch soon that takes care of both clock names and the compatible ids in
the phy-omap-usb2.c driver.
>>> + #phy-cells = <0>;
>>> + status = "disabled";
>>> + };
>>> + };
>>> +
>>> + ocp2scp1: ocp2scp@...e8000 {
>>> + compatible = "ti,omap-ocp2scp";
>>> + #address-cells = <1>;
>>> + #size-cells = <1>;
>>> + ranges;
>>> + ti,hwmods = "ocp2scp1";
>>> + status = "disabled";
>>> +
>>> + usb2_phy2: usb2phy2@...e8000 {
>>> + compatible = "ti,am437x-usb2";
>>> + reg = <0x483e8000 0x8000>;
>>> + ctrl-module = <&am43xx_control_usb2phy2>;
>>> + clocks = <&clk_32768_ck>,
>>> + <&usb_otg_ss1_refclk960m>;
>>> + clock-names = "usb_phy_cm_clk32k",
>>> + "usb_otg_ss_refclk960m";
>>> + #phy-cells = <0>;
>>> + status = "disabled";
>>> + };
>>> + };
>>> +
>>> + dwc3_1: omap_dwc3_1@...80000 {
>>> + compatible = "ti,am437x-dwc3";
>>> + ti,hwmods = "usb_otg_ss0";
>>> + reg = <0x48380000 0x10000>;
>>> + interrupts = <GIC_SPI 172 IRQ_TYPE_LEVEL_HIGH>;
>>> + #address-cells = <1>;
>>> + #size-cells = <1>;
>>> + utmi-mode = <1>;
>>> + ranges;
>>> + status = "disabled";
>>> +
>>> + usb1: usb@...90000 {
>>> + compatible = "synopsys,dwc3";
>>> + reg = <0x48390000 0x17000>;
>>> + interrupts = <GIC_SPI 168 IRQ_TYPE_LEVEL_HIGH>;
>>> + usb-phy = <&usb2_phy1>;
>> shouldn't this be phys = <&usb2_phy1>; ?
>
> At the time of writing this patch phys property is still not in.
> Also generic-phy conversion for dwc3 was recently posted by kishon.
>>> + phy-names = "usb2-phy";
>> what about
>> maximum-speed = "high-speed";
>> and
>> dr_mode = "otg"; ?
>
> Done from board file. Actually maximum-speed I can set here.
> dr_mode is a board property.
Is it a known standard that dr_mode must come from board dts?
I think dr_mode can be set here by default. Board can always override if it
needs non otg operation.
cheers,
-roger
>>> + status = "disabled";
>>> + };
>>> + };
>>> +
>>> + dwc3_2: omap_dwc3_2@...c0000 {
>>> + compatible = "ti,am437x-dwc3";
>>> + ti,hwmods = "usb_otg_ss1";
>>> + reg = <0x483c0000 0x10000>;
>>> + interrupts = <GIC_SPI 178 IRQ_TYPE_LEVEL_HIGH>;
>>> + #address-cells = <1>;
>>> + #size-cells = <1>;
>>> + utmi-mode = <1>;
>>> + ranges;
>>> + status = "disabled";
>>> +
>>> + usb2: usb@...d0000 {
>>> + compatible = "synopsys,dwc3";
>>> + reg = <0x483d0000 0x17000>;
>>> + interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
>>> + usb-phy = <&usb2_phy2>;
>>> + phy-names = "usb2-phy";
>>> + status = "disabled";
>>> + };
>>> + };
>>> +
>>> };
>>> };
>>>
>> cheers,
>> -roger
>
>
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