[PATCH] ARM: dt: sun8i-h3: Add sunxi-sid to dts for sun8i-h3

[PATCH] ARM: dt: sun8i-h3: Add sunxi-sid to dts for sun8i-h3

[Corentin Labbe]

This patch add support for the sunxi-sid driver to the device tree for sun8i-h3.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
---
 arch/arm/boot/dts/sun8i-h3.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
index 9f58bb4..abfd29c 100644
--- a/arch/arm/boot/dts/sun8i-h3.dtsi
+++ b/arch/arm/boot/dts/sun8i-h3.dtsi
@@ -211,6 +211,11 @@
 			#size-cells = <0>;
 		};
 
+		sid: eeprom@01c14200 {
+			compatible = "allwinner,sun7i-a20-sid";
+			reg = <0x01c14200 0x200>;
+		};
+
 		usbphy: phy@01c19400 {
 			compatible = "allwinner,sun8i-h3-usb-phy";
 			reg = <0x01c19400 0x2c>,
-- 
2.7.3

Re: [PATCH] ARM: dt: sun8i-h3: Add sunxi-sid to dts for sun8i-h3

[Jean-Francois Moine]

On Wed,  5 Oct 2016 11:48:24 +0200
Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

> This patch add support for the sunxi-sid driver to the device tree for sun8i-h3.
> 
> Signed-off-by: Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
>  arch/arm/boot/dts/sun8i-h3.dtsi | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
> index 9f58bb4..abfd29c 100644
> --- a/arch/arm/boot/dts/sun8i-h3.dtsi
> +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
> @@ -211,6 +211,11 @@
>  			#size-cells = <0>;
>  		};
>  
> +		sid: eeprom@01c14200 {
> +			compatible = "allwinner,sun7i-a20-sid";
> +			reg = <0x01c14200 0x200>;

The datasheet says 1Kb starting at 0x01c14000.
Is there any reason to reduce the area and to shift the offset?

> +		};
> +
>  		usbphy: phy@01c19400 {
>  			compatible = "allwinner,sun8i-h3-usb-phy";
>  			reg = <0x01c19400 0x2c>,
> -- 
> 2.7.3

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Jef		|		http://moinejf.free.fr/

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Re: [PATCH] ARM: dt: sun8i-h3: Add sunxi-sid to dts for sun8i-h3

[LABBE Corentin]

On Wed, Oct 05, 2016 at 12:21:30PM +0200, Jean-Francois Moine wrote:
> On Wed,  5 Oct 2016 11:48:24 +0200
> Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> 
> > This patch add support for the sunxi-sid driver to the device tree for sun8i-h3.
> > 
> > Signed-off-by: Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > ---
> >  arch/arm/boot/dts/sun8i-h3.dtsi | 5 +++++
> >  1 file changed, 5 insertions(+)
> > 
> > diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
> > index 9f58bb4..abfd29c 100644
> > --- a/arch/arm/boot/dts/sun8i-h3.dtsi
> > +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
> > @@ -211,6 +211,11 @@
> >  			#size-cells = <0>;
> >  		};
> >  
> > +		sid: eeprom@01c14200 {
> > +			compatible = "allwinner,sun7i-a20-sid";
> > +			reg = <0x01c14200 0x200>;
> 
> The datasheet says 1Kb starting at 0x01c14000.
> Is there any reason to reduce the area and to shift the offset?
> 

According to http://linux-sunxi.org/SID_Register_Guide "For Allwinner A83T and H3 the SID address space starts at 0x01c14000, and the e-fuses are at offset 0x200".
So I use this offset, since the sunxi_sid driver need the base address of e-fuses.

The easiest solution is to use 0x01c14200 since the other part of sid is not used and not known (A83T/H3 user manual doesnt give any information on all sid space, worse for A64 which reference SID only in memory map).

So probably for H3/A64/A83T, there will never any usage of the rest of the SID address space.

Regards
Corentin Labbe

Re: [PATCH] ARM: dt: sun8i-h3: Add sunxi-sid to dts for sun8i-h3

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 1957 bytes --]

On Wed, Oct 19, 2016 at 09:40:16AM +0200, LABBE Corentin wrote:
> On Wed, Oct 05, 2016 at 12:21:30PM +0200, Jean-Francois Moine wrote:
> > On Wed,  5 Oct 2016 11:48:24 +0200
> > Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > 
> > > This patch add support for the sunxi-sid driver to the device tree for sun8i-h3.
> > > 
> > > Signed-off-by: Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > > ---
> > >  arch/arm/boot/dts/sun8i-h3.dtsi | 5 +++++
> > >  1 file changed, 5 insertions(+)
> > > 
> > > diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
> > > index 9f58bb4..abfd29c 100644
> > > --- a/arch/arm/boot/dts/sun8i-h3.dtsi
> > > +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
> > > @@ -211,6 +211,11 @@
> > >  			#size-cells = <0>;
> > >  		};
> > >  
> > > +		sid: eeprom@01c14200 {
> > > +			compatible = "allwinner,sun7i-a20-sid";
> > > +			reg = <0x01c14200 0x200>;
> > 
> > The datasheet says 1Kb starting at 0x01c14000.
> > Is there any reason to reduce the area and to shift the offset?
> > 
> 
> According to http://linux-sunxi.org/SID_Register_Guide "For
> Allwinner A83T and H3 the SID address space starts at 0x01c14000,
> and the e-fuses are at offset 0x200".
>
> So I use this offset, since the sunxi_sid driver need the base
> address of e-fuses.
> 
> The easiest solution is to use 0x01c14200 since the other part of
> sid is not used and not known (A83T/H3 user manual doesnt give any
> information on all sid space, worse for A64 which reference SID only
> in memory map).
> 
> So probably for H3/A64/A83T, there will never any usage of the rest
> of the SID address space.

And since we can't know that, and we have to maintain the DT ABI,
using the whole address map and an offset, with a new compatible, is
definetely the safest thing to do.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

Re: [PATCH] ARM: dt: sun8i-h3: Add sunxi-sid to dts for sun8i-h3

[LABBE Corentin]

On Thu, Oct 20, 2016 at 10:36:54PM +0200, Maxime Ripard wrote:
> On Wed, Oct 19, 2016 at 09:40:16AM +0200, LABBE Corentin wrote:
> > On Wed, Oct 05, 2016 at 12:21:30PM +0200, Jean-Francois Moine wrote:
> > > On Wed,  5 Oct 2016 11:48:24 +0200
> > > Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > 
> > > > This patch add support for the sunxi-sid driver to the device tree for sun8i-h3.
> > > > 
> > > > Signed-off-by: Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > > > ---
> > > >  arch/arm/boot/dts/sun8i-h3.dtsi | 5 +++++
> > > >  1 file changed, 5 insertions(+)
> > > > 
> > > > diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
> > > > index 9f58bb4..abfd29c 100644
> > > > --- a/arch/arm/boot/dts/sun8i-h3.dtsi
> > > > +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
> > > > @@ -211,6 +211,11 @@
> > > >  			#size-cells = <0>;
> > > >  		};
> > > >  
> > > > +		sid: eeprom@01c14200 {
> > > > +			compatible = "allwinner,sun7i-a20-sid";
> > > > +			reg = <0x01c14200 0x200>;
> > > 
> > > The datasheet says 1Kb starting at 0x01c14000.
> > > Is there any reason to reduce the area and to shift the offset?
> > > 
> > 
> > According to http://linux-sunxi.org/SID_Register_Guide "For
> > Allwinner A83T and H3 the SID address space starts at 0x01c14000,
> > and the e-fuses are at offset 0x200".
> >
> > So I use this offset, since the sunxi_sid driver need the base
> > address of e-fuses.
> > 
> > The easiest solution is to use 0x01c14200 since the other part of
> > sid is not used and not known (A83T/H3 user manual doesnt give any
> > information on all sid space, worse for A64 which reference SID only
> > in memory map).
> > 
> > So probably for H3/A64/A83T, there will never any usage of the rest
> > of the SID address space.
> 
> And since we can't know that, and we have to maintain the DT ABI,
> using the whole address map and an offset, with a new compatible, is
> definetely the safest thing to do.
> 

I have two way of doing it, which one do you prefer ?

- Adding two optionnal properties: efuses-offset and efuses-size defaulting to 0 and resourcesize.
- Adding a subnode called efuses with its own reg=<>

The first one is easy and didnt need any work on previous DT entries.

Regards
Corentin Labbe
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Re: [PATCH] ARM: dt: sun8i-h3: Add sunxi-sid to dts for sun8i-h3

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 2661 bytes --]

On Sun, Oct 23, 2016 at 10:26:31AM +0200, LABBE Corentin wrote:
> On Thu, Oct 20, 2016 at 10:36:54PM +0200, Maxime Ripard wrote:
> > On Wed, Oct 19, 2016 at 09:40:16AM +0200, LABBE Corentin wrote:
> > > On Wed, Oct 05, 2016 at 12:21:30PM +0200, Jean-Francois Moine wrote:
> > > > On Wed,  5 Oct 2016 11:48:24 +0200
> > > > Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > 
> > > > > This patch add support for the sunxi-sid driver to the device tree for sun8i-h3.
> > > > > 
> > > > > Signed-off-by: Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > > > > ---
> > > > >  arch/arm/boot/dts/sun8i-h3.dtsi | 5 +++++
> > > > >  1 file changed, 5 insertions(+)
> > > > > 
> > > > > diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
> > > > > index 9f58bb4..abfd29c 100644
> > > > > --- a/arch/arm/boot/dts/sun8i-h3.dtsi
> > > > > +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
> > > > > @@ -211,6 +211,11 @@
> > > > >  			#size-cells = <0>;
> > > > >  		};
> > > > >  
> > > > > +		sid: eeprom@01c14200 {
> > > > > +			compatible = "allwinner,sun7i-a20-sid";
> > > > > +			reg = <0x01c14200 0x200>;
> > > > 
> > > > The datasheet says 1Kb starting at 0x01c14000.
> > > > Is there any reason to reduce the area and to shift the offset?
> > > > 
> > > 
> > > According to http://linux-sunxi.org/SID_Register_Guide "For
> > > Allwinner A83T and H3 the SID address space starts at 0x01c14000,
> > > and the e-fuses are at offset 0x200".
> > >
> > > So I use this offset, since the sunxi_sid driver need the base
> > > address of e-fuses.
> > > 
> > > The easiest solution is to use 0x01c14200 since the other part of
> > > sid is not used and not known (A83T/H3 user manual doesnt give any
> > > information on all sid space, worse for A64 which reference SID only
> > > in memory map).
> > > 
> > > So probably for H3/A64/A83T, there will never any usage of the rest
> > > of the SID address space.
> > 
> > And since we can't know that, and we have to maintain the DT ABI,
> > using the whole address map and an offset, with a new compatible, is
> > definetely the safest thing to do.
> > 
> 
> I have two way of doing it, which one do you prefer ?
> 
> - Adding two optionnal properties: efuses-offset and efuses-size defaulting to 0 and resourcesize.
> - Adding a subnode called efuses with its own reg=<>
> 
> The first one is easy and didnt need any work on previous DT entries.

I'd prefer to have a compatible, and the size and/or offset of the
efuses associated to it.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com