linux-kernel - Re: [PATCH 2/8] ARM: dts: dra7-clock: Add "l3init_960m

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Date:	Mon, 10 Mar 2014 13:05:08 +0200
From:	Roger Quadros <rogerq@...com>
To:	Tero Kristo <t-kristo@...com>, <balbi@...com>, <tony@...mide.com>
CC:	<kishon@...com>, <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 2/8] ARM: dts: dra7-clock: Add "l3init_960m_gfclk" clock
 gate

On 03/07/2014 03:59 PM, Tero Kristo wrote:
> On 03/07/2014 03:09 PM, Roger Quadros wrote:
>> This clock gate description was missing in older Reference manuals.
>> It is present on the SoC to provide 960MHz reference clock to the
>> internal USB PHYs.
> 
> Can you provide a document reference here?
> 

Unfortunately it hasn't yet been included in the TRM.
I have the internal defect ID but I don't think it makes any sense here.

DRA7xx-TRMINC00203

cheers,
-roger

> 
>>
>> Use l3init_960m_gfclk as parent of usb_otg_ss1_refclk960m and
>> usb_otg_ss2_refclk960m.
>>
>> CC: Tero Kristo <t-kristo@...com>
>> Signed-off-by: Roger Quadros <rogerq@...com>
>> ---
>>   arch/arm/boot/dts/dra7xx-clocks.dtsi | 12 ++++++++++--
>>   1 file changed, 10 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/arm/boot/dts/dra7xx-clocks.dtsi b/arch/arm/boot/dts/dra7xx-clocks.dtsi
>> index e96da9a..b8d3a9d 100644
>> --- a/arch/arm/boot/dts/dra7xx-clocks.dtsi
>> +++ b/arch/arm/boot/dts/dra7xx-clocks.dtsi
>> @@ -1386,6 +1386,14 @@
>>           ti,dividers = <1>, <8>;
>>       };
>>
>> +    l3init_960m_gfclk: l3init_960m_gfclk {
>> +        #clock-cells = <0>;
>> +        compatible = "ti,gate-clock";
>> +        clocks = <&dpll_usb_clkdcoldo>;
>> +        ti,bit-shift = <8>;
>> +        reg = <0x06c0>;
>> +    };
>> +
>>       dss_32khz_clk: dss_32khz_clk {
>>           #clock-cells = <0>;
>>           compatible = "ti,gate-clock";
>> @@ -1533,7 +1541,7 @@
>>       usb_otg_ss1_refclk960m: usb_otg_ss1_refclk960m {
>>           #clock-cells = <0>;
>>           compatible = "ti,gate-clock";
>> -        clocks = <&dpll_usb_clkdcoldo>;
>> +        clocks = <&l3init_960m_gfclk>;
>>           ti,bit-shift = <8>;
>>           reg = <0x13f0>;
>>       };
>> @@ -1541,7 +1549,7 @@
>>       usb_otg_ss2_refclk960m: usb_otg_ss2_refclk960m {
>>           #clock-cells = <0>;
>>           compatible = "ti,gate-clock";
>> -        clocks = <&dpll_usb_clkdcoldo>;
>> +        clocks = <&l3init_960m_gfclk>;
>>           ti,bit-shift = <8>;
>>           reg = <0x1340>;
>>       };
>>
> 

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