linux-kernel - Re: [PATCH V3 12/17] dt-binding: mt8192: Add infra

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Message-ID: <5ec37a01b0b84140a7d171b9a5cff7ad8f9fbe87.camel@mediatek.com>
Date:   Mon, 25 Apr 2022 13:01:42 +0800
From:   Rex-BC Chen <rex-bc.chen@...iatek.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>
CC:     "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        Chun-Jie Chen (陳浚桀) 
        <Chun-Jie.Chen@...iatek.com>,
        "wenst@...omium.org" <wenst@...omium.org>,
        Runyang Chen (陈润洋) 
        <Runyang.Chen@...iatek.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH V3 12/17] dt-binding: mt8192: Add infra_ao reset bit

On Sat, 2022-04-23 at 18:28 +0800, Krzysztof Kozlowski wrote:
> On 22/04/2022 08:01, Rex-BC Chen wrote:
> > To support reset of infra_ao, add the bit definition for
> > thermal/PCIe/SVS.
> > 
> > Signed-off-by: Rex-BC Chen <rex-bc.chen@...iatek.com>
> > ---
> >  include/dt-bindings/reset/mt8192-resets.h | 10 ++++++++++
> >  1 file changed, 10 insertions(+)
> > 
> > diff --git a/include/dt-bindings/reset/mt8192-resets.h
> > b/include/dt-bindings/reset/mt8192-resets.h
> > index be9a7ca245b9..d5f3433175c1 100644
> > --- a/include/dt-bindings/reset/mt8192-resets.h
> > +++ b/include/dt-bindings/reset/mt8192-resets.h
> > @@ -27,4 +27,14 @@
> >  
> >  #define MT8192_TOPRGU_SW_RST_NUM				23
> >  
> > +/* INFRA RST0 */
> > +#define MT8192_INFRA_RST0_LVTS_AP_RST				
> > 0
> > +/* INFRA RST2 */
> > +#define MT8192_INFRA_RST2_PCIE_PHY_RST				
> > 15
> > +/* INFRA RST3 */
> > +#define MT8192_INFRA_RST3_PTP_RST				5
> > +/* INFRA RST4 */
> > +#define MT8192_INFRA_RST4_LVTS_MCU				12
> > +#define MT8192_INFRA_RST4_PCIE_TOP				1
> 
> These should be the IDs of reset, not some register values/offsets.
> Therefore it is expected to have them incremented by 1.
> 
> 

Hello Krzysztof,

This is define bit.

There is serveral reset set for infra_ao while it's not serial.
For MT8192, it's 0x120/0x130/0x140/0x150/0x730.
We are implement #reset-cells = <2>, and we can use this reset drive
more easier.

For example, in dts, we can define
infra_ao: syscon {
	compatible = "mediatek,mt8192-infracfg", "syscon";
 	reg = <0 0x10001000 0 0x1000>;
 	#clock-cells = <1>;
	#reset-cells = <2>;
};

thermal {
	...
	resets = <&infra_ao 0x730 MT8192_INFRA_RST4_LVTS_MCU>;
	...
};

If it's acceptabel, I can update all bit difinition from 0 to 15 for
all reset set.

BRs,
Rex
> > +
> >  #endif  /* _DT_BINDINGS_RESET_CONTROLLER_MT8192 */
> 
> 
> Best regards,
> Krzysztof