linux-kernel - Re: [PATCH 7/8] ARM: dts: dra7: Add USB related nodes

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Date:	Fri, 14 Mar 2014 14:11:56 +0200
From:	Roger Quadros <rogerq@...com>
To:	Kishon Vijay Abraham I <kishon@...com>, <balbi@...com>,
	<tony@...mide.com>
CC:	<george.cherian@...com>, <linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-usb@...r.kernel.org>
Subject: Re: [PATCH 7/8] ARM: dts: dra7: Add USB related nodes

On 03/14/2014 12:38 PM, Kishon Vijay Abraham I wrote:
> Hi Roger,
> 
> On Friday 07 March 2014 06:39 PM, Roger Quadros wrote:
>> Add nodes for the Super Speed USB controllers, omap-control-usb,
>> USB2 PHY and USB3 PHY devices.
>>
>> Remove ocp2scp1 address space from hwmod data as it is
>> now provided via device tree.
>>
>> Signed-off-by: Roger Quadros <rogerq@...com>
>> ---
>>   arch/arm/boot/dts/dra7.dtsi               | 110 ++++++++++++++++++++++++++++++
>>   arch/arm/mach-omap2/omap_hwmod_7xx_data.c |  10 ---
>>   2 files changed, 110 insertions(+), 10 deletions(-)
>>
>> diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
>> index 597979b..1e73900 100644
>> --- a/arch/arm/boot/dts/dra7.dtsi
>> +++ b/arch/arm/boot/dts/dra7.dtsi
>> @@ -811,6 +811,116 @@
>>               clocks = <&sata_ref_clk>;
>>               ti,hwmods = "sata";
>>           };
>> +
>> +        omap_control_usb2phy1: control-phy@...02300 {
>> +            compatible = "ti,control-phy-usb2";
>> +            reg = <0x4a002300 0x4>;
>> +            reg-names = "power";
>> +        };
>> +
>> +        omap_control_usb3phy1: control-phy@...02370 {
>> +            compatible = "ti,control-phy-pipe3";
>> +            reg = <0x4a002370 0x4>;
>> +            reg-names = "power";
>> +        };
>> +
>> +        omap_control_usb2phy2: control-phy@...a002e74 {
>> +            compatible = "ti,control-phy-usb2-dra7";
>> +            reg = <0x4a002e74 0x4>;
>> +            reg-names = "power";
>> +        };
>> +
>> +        /* OCP2SCP1 */
>> +        ocp2scp@...80000 {
>> +            compatible = "ti,omap-ocp2scp";
>> +            #address-cells = <1>;
>> +            #size-cells = <1>;
>> +            ranges;
>> +            reg = <0x4a080000 0x20>;
>> +            ti,hwmods = "ocp2scp1";
>> +
>> +            usb2_phy1: phy@...84000 {
>> +                compatible = "ti,omap-usb2";
>> +                reg = <0x4a084000 0x400>;
>> +                ctrl-module = <&omap_control_usb2phy1>;
>> +                clocks = <&usb_phy1_always_on_clk32k>,
>> +                     <&usb_otg_ss1_refclk960m>;
>> +                clock-names =    "wkupclk",
>> +                        "refclk";
>> +                #phy-cells = <0>;
>> +            };
>> +
>> +            usb2_phy2: phy@...85000 {
>> +                compatible = "ti,omap-usb2";
>> +                reg = <0x4a085000 0x400>;
>> +                ctrl-module = <&omap_control_usb2phy2>;
>> +                clocks = <&usb_phy2_always_on_clk32k>,
>> +                     <&usb_otg_ss2_refclk960m>;
>> +                clock-names =    "wkupclk",
>> +                        "refclk";
>> +                #phy-cells = <0>;
>> +            };
>> +
>> +            usb3_phy1: phy@...84400 {
>> +                compatible = "ti,omap-usb3";
>> +                reg = <0x4a084400 0x80>,
>> +                      <0x4a084800 0x64>,
>> +                      <0x4a084c00 0x40>;
>> +                reg-names = "phy_rx", "phy_tx", "pll_ctrl";
>> +                ctrl-module = <&omap_control_usb3phy1>;
>> +                clocks = <&usb_phy3_always_on_clk32k>,
>> +                     <&sys_clkin1>,
>> +                     <&usb_otg_ss1_refclk960m>,
>> +                     <&dpll_core_h13x2_ck>;
>> +                clock-names =    "wkupclk",
>> +                        "sysclk",
>> +                        "refclk",
>> +                        "optclk";
> 
> Do we use this 'optclk' in driver?

No we don't. Still the device seems to work without it.
This is supposed to be USB_LFPS_TX_GFCLK or USB3PHY_REF_CLK.

Any idea why it works without that on OMAP5 as well?

cheers,
-roger

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