linux-kernel - Re: [PATCH v5 2/4] dt-bindings: add bindings for rk3399 clock controller

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Date:	Mon, 28 Mar 2016 11:24:47 +0800
From:	Xing Zheng <zhengxing@...k-chips.com>
To:	Heiko Stuebner <heiko@...ech.de>
CC:	linux-rockchip@...ts.infradead.org, huangtao@...k-chips.com,
	jay.xu@...k-chips.com, elaine.zhang@...k-chips.com,
	dianders@...omium.org, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Stephen Boyd <sboyd@...eaurora.org>,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/4] dt-bindings: add bindings for rk3399 clock controller

Hi Heiko,

On 2016年03月28日 08:07, Heiko Stuebner wrote:
> Hi Xing,
>
> Am Montag, 28. März 2016, 01:52:12 schrieb Heiko Stübner:
>> Am Samstag, 26. März 2016, 14:37:54 schrieb Xing Zheng:
>>> Add devicetree bindings for Rockchip cru which found on
>>> Rockchip SoCs.
>>>
>>> Signed-off-by: Xing Zheng<zhengxing@...k-chips.com>
>>> Signed-off-by: Jianqun Xu<jay.xu@...k-chips.com>
>>> Acked-by: Rob Herring<robh@...nel.org>
>>> ---
>>>
>>> Changes in v5: None
>>> Changes in v3: None
>>> Changes in v2: None
>>>
>>>   .../bindings/clock/rockchip,rk3399-cru.txt         |   83
>>>
>>> ++++++++++++++++++++ 1 file changed, 83 insertions(+)
>>>
>>>   create mode 100644
>>>
>>> Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt
>>>
>>> diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3399-
>> cru.txt
>>
>>> b/Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt new
>>> file mode 100644
>>> index 0000000..9427caa
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt
>>> @@ -0,0 +1,83 @@
>>> +* Rockchip RK3399 Clock and Reset Unit
>>> +
>>> +The RK3399 clock controller generates and supplies clock to various
>>> +controllers within the SoC and also implements a reset controller for
>>> SoC +peripherals.
>>> +
>>> +Required Properties:
>>> +
>>> +- compatible: PMU for CRU should be "rockchip,rk3399-pmucru"
>>> +- compatible: CRU should be "rockchip,rk3399-cru"
>>> +- reg: physical base address of the controller and length of memory
>> mapped
>>
>>> +  region.
>>> +- #clock-cells: should be 1.
>>> +- #reset-cells: should be 1.
>>> +
>>> +Optional Properties:
>>> +
>>> +- rockchip,grf: phandle to the syscon managing the "general register
>> files"
>>
>>> +  If missing, pll rates are not changeable, due to the missing pll lock
>>> status. +
>> the rk3399 doesn't need the GRF, so we should drop this block for now
> actually, I just saw that the GRF is needed for the static settings during
> init. So the rockchip,grf should stay but also move up to required
> properties?
>
> Same for the grf-comment in the examples-section.
>
>
I check the setting of the pclk_alive and pclk_pmu_src are not gating 
default on the PMUGRF_SOC_CON0,
so I think that we don't need to do the static settings to re-enable 
them in the clock driver any more.

Thanks.

-- 
- Xing Zheng