[PATCH v2 06/18] ARM: dts: DRA7: Add divider table to optfclk_pciephy_div clock
Kishon Vijay Abraham I
kishon at ti.com
Thu Jun 19 05:45:53 PDT 2014
Hi Tero,
On Thursday 19 June 2014 04:40 PM, Tero Kristo wrote:
> On 05/29/2014 09:38 AM, Kishon Vijay Abraham I wrote:
>> From: Keerthy <j-keerthy at ti.com>
>>
>> Add divider table to optfclk_pciephy_div clock. The Documentation
>> for divider clock can be found at ../clock/ti/divider.txt
>
> This patch requires a better changelog. Why is the change done, any TRM refs etc.?
The 8th bit of CM_CLKMODE_APLL_PCIE can be programmed to either 0x0 or 0x1
based on if the divider value is 0x2 or 0x1.
Figure 26-21. PCIe PHY Clock Generator Overview in vE of DRA7xx ES1.0 shows the
block diagram of Clock Generator Subsystem of PCIe PHY module. We have to do a
bypass (divided by 1) in order to get the correct PCIE_PHY_DIV_GCLK
frequency.
Thanks
Kishon
>
> -Tero
>
>>
>> Cc: Rajendra Nayak <rnayak at ti.com>
>> Cc: Tero Kristo <t-kristo at ti.com>
>> Cc: Paul Walmsley <paul at pwsan.com>
>> Signed-off-by: Keerthy <j-keerthy at ti.com>
>> Signed-off-by: Kishon Vijay Abraham I <kishon at ti.com>
>> ---
>> arch/arm/boot/dts/dra7xx-clocks.dtsi | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/arm/boot/dts/dra7xx-clocks.dtsi
>> b/arch/arm/boot/dts/dra7xx-clocks.dtsi
>> index c767687..55e95c5 100644
>> --- a/arch/arm/boot/dts/dra7xx-clocks.dtsi
>> +++ b/arch/arm/boot/dts/dra7xx-clocks.dtsi
>> @@ -1170,6 +1170,7 @@
>> clocks = <&apll_pcie_ck>;
>> #clock-cells = <0>;
>> reg = <0x021c>;
>> + ti,dividers = <2>, <1>;
>> ti,bit-shift = <8>;
>> ti,max-div = <2>;
>> };
>>
>
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