[PATCH v2] ARM: dts: sunxi: Add sid for a83t

[PATCH v2] ARM: dts: sunxi: Add sid for a83t

[kevans91-OYTqUY/oFF8]

Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
thermal calibration data, add node to describe it.

a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
supported in an external driver for FreeBSD.

Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
---

Changes in v2:
 - remove bogus "From:" line in commit text; no functional change

 Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt | 1 +
 arch/arm/boot/dts/sun8i-a83t.dtsi                               | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt b/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
index d69543701..e319fe5e2 100644
--- a/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
+++ b/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
@@ -4,6 +4,7 @@ Required properties:
 - compatible: Should be one of the following:
   "allwinner,sun4i-a10-sid"
   "allwinner,sun7i-a20-sid"
+  "allwinner,sun8i-a83t-sid"
   "allwinner,sun8i-h3-sid"
   "allwinner,sun50i-a64-sid"
 
diff --git a/arch/arm/boot/dts/sun8i-a83t.dtsi b/arch/arm/boot/dts/sun8i-a83t.dtsi
index de5119a2a..cced6e5fb 100644
--- a/arch/arm/boot/dts/sun8i-a83t.dtsi
+++ b/arch/arm/boot/dts/sun8i-a83t.dtsi
@@ -238,6 +238,11 @@
 			#size-cells = <0>;
 		};
 
+		sid: eeprom@1c14000 {
+			compatible = "allwinner,sun8i-a83t-sid";
+			reg = <0x1c14000 0x400>;
+		};
+
 		usb_otg: usb@1c19000 {
 			compatible = "allwinner,sun8i-a83t-musb",
 				     "allwinner,sun8i-a33-musb";
-- 
2.15.1

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Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Rob Herring]

On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
> thermal calibration data, add node to describe it.
> 
> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
> supported in an external driver for FreeBSD.
> 
> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
> ---
> 
> Changes in v2:
>  - remove bogus "From:" line in commit text; no functional change
> 
>  Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt | 1 +
>  arch/arm/boot/dts/sun8i-a83t.dtsi                               | 5 +++++
>  2 files changed, 6 insertions(+)

Reviewed-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
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Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 733 bytes --]

Hi Kyle,

On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
> thermal calibration data, add node to describe it.
> 
> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
> supported in an external driver for FreeBSD.
> 
> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>

The patch looks fine in itself, but we've had a number of issues with
the register layout (and access patterns) in the past, so I'd rather
have something that works in Linux too if possible.

Maxime

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

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Kyle Evans]

On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
<maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> Hi Kyle,
>
> On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
>> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
>> thermal calibration data, add node to describe it.
>>
>> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
>> supported in an external driver for FreeBSD.
>>
>> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
>
> The patch looks fine in itself, but we've had a number of issues with
> the register layout (and access patterns) in the past, so I'd rather
> have something that works in Linux too if possible.

Hello!

I have a patch that I think should make it work fine on Linux [1], but
I'm afraid I have little to no capability to test it myself and so I
did not add it as well.

I do know that the rootkey is offset 0x200 into the given space [2],
as is the case with the H3, and that the readout quirk is not needed.
I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
H3, but I do know that thermal data can be found at 0x34 and 0x38 in
this space.

[1] https://people.freebsd.org/~kevans/sunxi-sid.diff
[2] https://svnweb.freebsd.org/base/head/sys/arm/allwinner/aw_sid.c?view=markup#l56
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Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 1685 bytes --]

Hi,

On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
> On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
> <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> > Hi Kyle,
> >
> > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
> >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
> >> thermal calibration data, add node to describe it.
> >>
> >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
> >> supported in an external driver for FreeBSD.
> >>
> >> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
> >
> > The patch looks fine in itself, but we've had a number of issues with
> > the register layout (and access patterns) in the past, so I'd rather
> > have something that works in Linux too if possible.
> 
> I have a patch that I think should make it work fine on Linux [1], but
> I'm afraid I have little to no capability to test it myself and so I
> did not add it as well.
> 
> I do know that the rootkey is offset 0x200 into the given space [2],
> as is the case with the H3, and that the readout quirk is not needed.
> I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
> H3, but I do know that thermal data can be found at 0x34 and 0x38 in
> this space.

Then maybe we should leave it aside until someone takes some time on
the A83t. The good news is that the binding itself looks fine, so as
far as FreeBSD goes, there shouldn't be anything preventing you from
using it I guess.

Chen-Yu, what do you think?

Thanks!
Maxime

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

Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Kyle Evans]

On Thu, Dec 21, 2017 at 9:26 AM, Maxime Ripard
<maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> Hi,
>
> On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
>> On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
>> <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>> > Hi Kyle,
>> >
>> > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
>> >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
>> >> thermal calibration data, add node to describe it.
>> >>
>> >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
>> >> supported in an external driver for FreeBSD.
>> >>
>> >> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
>> >
>> > The patch looks fine in itself, but we've had a number of issues with
>> > the register layout (and access patterns) in the past, so I'd rather
>> > have something that works in Linux too if possible.
>>
>> I have a patch that I think should make it work fine on Linux [1], but
>> I'm afraid I have little to no capability to test it myself and so I
>> did not add it as well.
>>
>> I do know that the rootkey is offset 0x200 into the given space [2],
>> as is the case with the H3, and that the readout quirk is not needed.
>> I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
>> H3, but I do know that thermal data can be found at 0x34 and 0x38 in
>> this space.
>
> Then maybe we should leave it aside until someone takes some time on
> the A83t. The good news is that the binding itself looks fine, so as
> far as FreeBSD goes, there shouldn't be anything preventing you from
> using it I guess.

Yeah, we've had this exact binding in our own copy of DTS up until a
recent point when we flipped the switch to pulling DT from Mainline
Linux and trying to upstream changes instead of having a bunch of
local modifications in our tree.

> Chen-Yu, what do you think?
>
> Thanks!
> Maxime
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com
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Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Chen-Yu Tsai]

On Thu, Dec 21, 2017 at 11:26 PM, Maxime Ripard
<maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> Hi,
>
> On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
>> On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
>> <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>> > Hi Kyle,
>> >
>> > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
>> >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
>> >> thermal calibration data, add node to describe it.
>> >>
>> >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
>> >> supported in an external driver for FreeBSD.
>> >>
>> >> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
>> >
>> > The patch looks fine in itself, but we've had a number of issues with
>> > the register layout (and access patterns) in the past, so I'd rather
>> > have something that works in Linux too if possible.
>>
>> I have a patch that I think should make it work fine on Linux [1], but
>> I'm afraid I have little to no capability to test it myself and so I
>> did not add it as well.
>>
>> I do know that the rootkey is offset 0x200 into the given space [2],
>> as is the case with the H3, and that the readout quirk is not needed.
>> I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
>> H3, but I do know that thermal data can be found at 0x34 and 0x38 in
>> this space.
>
> Then maybe we should leave it aside until someone takes some time on
> the A83t. The good news is that the binding itself looks fine, so as
> far as FreeBSD goes, there shouldn't be anything preventing you from
> using it I guess.
>
> Chen-Yu, what do you think?

Looks good to me.

ChenYu

Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Emmanuel Vadot]

 Hi Maxime,

On Thu, 21 Dec 2017 16:26:30 +0100
Maxime Ripard <maxime.ripard@free-electrons.com> wrote:

> Hi,
> 
> On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
> > On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
> > <maxime.ripard@free-electrons.com> wrote:
> > > Hi Kyle,
> > >
> > > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91@ksu.edu wrote:
> > >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
> > >> thermal calibration data, add node to describe it.
> > >>
> > >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
> > >> supported in an external driver for FreeBSD.
> > >>
> > >> Signed-off-by: Kyle Evans <kevans91@ksu.edu>
> > >
> > > The patch looks fine in itself, but we've had a number of issues with
> > > the register layout (and access patterns) in the past, so I'd rather
> > > have something that works in Linux too if possible.
> > 
> > I have a patch that I think should make it work fine on Linux [1], but
> > I'm afraid I have little to no capability to test it myself and so I
> > did not add it as well.
> > 
> > I do know that the rootkey is offset 0x200 into the given space [2],
> > as is the case with the H3, and that the readout quirk is not needed.
> > I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
> > H3, but I do know that thermal data can be found at 0x34 and 0x38 in
> > this space.
> 
> Then maybe we should leave it aside until someone takes some time on
> the A83t. 

 Take some time on the Linux driver and do not apply this patch for
now you mean ?

 Cheers,

> The good news is that the binding itself looks fine, so as
> far as FreeBSD goes, there shouldn't be anything preventing you from
> using it I guess.
>
> Chen-Yu, what do you think?
> 
> Thanks!
> Maxime
> 
> -- 
> Maxime Ripard, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com

-- 
Emmanuel Vadot <manu@bidouilliste.com>

Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 1940 bytes --]

On Thu, Dec 21, 2017 at 07:09:03PM +0100, Emmanuel Vadot wrote:
> 
>  Hi Maxime,
> 
> On Thu, 21 Dec 2017 16:26:30 +0100
> Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> 
> > Hi,
> > 
> > On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
> > > On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
> > > <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> > > > Hi Kyle,
> > > >
> > > > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
> > > >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
> > > >> thermal calibration data, add node to describe it.
> > > >>
> > > >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
> > > >> supported in an external driver for FreeBSD.
> > > >>
> > > >> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
> > > >
> > > > The patch looks fine in itself, but we've had a number of issues with
> > > > the register layout (and access patterns) in the past, so I'd rather
> > > > have something that works in Linux too if possible.
> > > 
> > > I have a patch that I think should make it work fine on Linux [1], but
> > > I'm afraid I have little to no capability to test it myself and so I
> > > did not add it as well.
> > > 
> > > I do know that the rootkey is offset 0x200 into the given space [2],
> > > as is the case with the H3, and that the readout quirk is not needed.
> > > I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
> > > H3, but I do know that thermal data can be found at 0x34 and 0x38 in
> > > this space.
> > 
> > Then maybe we should leave it aside until someone takes some time on
> > the A83t. 
> 
>  Take some time on the Linux driver and do not apply this patch for
> now you mean ?

Yep.

Maxime

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

Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Emmanuel Vadot]

On Fri, 22 Dec 2017 09:35:08 +0100
Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:

> On Thu, Dec 21, 2017 at 07:09:03PM +0100, Emmanuel Vadot wrote:
> > 
> >  Hi Maxime,
> > 
> > On Thu, 21 Dec 2017 16:26:30 +0100
> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> > 
> > > Hi,
> > > 
> > > On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
> > > > On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
> > > > <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> > > > > Hi Kyle,
> > > > >
> > > > > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
> > > > >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
> > > > >> thermal calibration data, add node to describe it.
> > > > >>
> > > > >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
> > > > >> supported in an external driver for FreeBSD.
> > > > >>
> > > > >> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
> > > > >
> > > > > The patch looks fine in itself, but we've had a number of issues with
> > > > > the register layout (and access patterns) in the past, so I'd rather
> > > > > have something that works in Linux too if possible.
> > > > 
> > > > I have a patch that I think should make it work fine on Linux [1], but
> > > > I'm afraid I have little to no capability to test it myself and so I
> > > > did not add it as well.
> > > > 
> > > > I do know that the rootkey is offset 0x200 into the given space [2],
> > > > as is the case with the H3, and that the readout quirk is not needed.
> > > > I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
> > > > H3, but I do know that thermal data can be found at 0x34 and 0x38 in
> > > > this space.
> > > 
> > > Then maybe we should leave it aside until someone takes some time on
> > > the A83t. 
> > 
> >  Take some time on the Linux driver and do not apply this patch for
> > now you mean ?
> 
> Yep.
> 
> Maxime

 Since linux doesn't have the compatible in it's driver what would
be the harm to add the node in the DTS ? If a quirks is needed because
some region is weird this would go in the driver right ? I don't see a
technical problem for adding this node right now.
 If Kyle confirm the lenght of the region and that no quirk is needed
will it be enough ?

 Cheers,

-- 
Emmanuel Vadot <manu-xXdDKFdH5B3kFDPD4ZthVA@public.gmane.org>
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Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Chen-Yu Tsai]

On Fri, Dec 22, 2017 at 6:07 PM, Emmanuel Vadot <manu-xXdDKFdH5B3kFDPD4ZthVA@public.gmane.org> wrote:
> On Fri, 22 Dec 2017 09:35:08 +0100
> Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>
>> On Thu, Dec 21, 2017 at 07:09:03PM +0100, Emmanuel Vadot wrote:
>> >
>> >  Hi Maxime,
>> >
>> > On Thu, 21 Dec 2017 16:26:30 +0100
>> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>> >
>> > > Hi,
>> > >
>> > > On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
>> > > > On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
>> > > > <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>> > > > > Hi Kyle,
>> > > > >
>> > > > > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
>> > > > >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
>> > > > >> thermal calibration data, add node to describe it.
>> > > > >>
>> > > > >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
>> > > > >> supported in an external driver for FreeBSD.
>> > > > >>
>> > > > >> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
>> > > > >
>> > > > > The patch looks fine in itself, but we've had a number of issues with
>> > > > > the register layout (and access patterns) in the past, so I'd rather
>> > > > > have something that works in Linux too if possible.
>> > > >
>> > > > I have a patch that I think should make it work fine on Linux [1], but
>> > > > I'm afraid I have little to no capability to test it myself and so I
>> > > > did not add it as well.
>> > > >
>> > > > I do know that the rootkey is offset 0x200 into the given space [2],
>> > > > as is the case with the H3, and that the readout quirk is not needed.
>> > > > I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
>> > > > H3, but I do know that thermal data can be found at 0x34 and 0x38 in
>> > > > this space.
>> > >
>> > > Then maybe we should leave it aside until someone takes some time on
>> > > the A83t.
>> >
>> >  Take some time on the Linux driver and do not apply this patch for
>> > now you mean ?
>>
>> Yep.
>>
>> Maxime
>
>  Since linux doesn't have the compatible in it's driver what would
> be the harm to add the node in the DTS ? If a quirks is needed because
> some region is weird this would go in the driver right ? I don't see a
> technical problem for adding this node right now.
>  If Kyle confirm the lenght of the region and that no quirk is needed
> will it be enough ?

I guess I wasn't very clear. I'm OK with the patch going in. The device
node currently says nothing about how much efuse space there is. The
memory region covers that and the control section, and the size matches
what the memory map says.

The size and offset of the efuse space would be dealt with in the driver.


ChenYu

Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Maxime Ripard]

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On Fri, Dec 22, 2017 at 06:11:52PM +0800, Chen-Yu Tsai wrote:
> On Fri, Dec 22, 2017 at 6:07 PM, Emmanuel Vadot <manu-xXdDKFdH5B3kFDPD4ZthVA@public.gmane.org> wrote:
> > On Fri, 22 Dec 2017 09:35:08 +0100
> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> >
> >> On Thu, Dec 21, 2017 at 07:09:03PM +0100, Emmanuel Vadot wrote:
> >> >
> >> >  Hi Maxime,
> >> >
> >> > On Thu, 21 Dec 2017 16:26:30 +0100
> >> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> >> >
> >> > > Hi,
> >> > >
> >> > > On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
> >> > > > On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
> >> > > > <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> >> > > > > Hi Kyle,
> >> > > > >
> >> > > > > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
> >> > > > >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
> >> > > > >> thermal calibration data, add node to describe it.
> >> > > > >>
> >> > > > >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
> >> > > > >> supported in an external driver for FreeBSD.
> >> > > > >>
> >> > > > >> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
> >> > > > >
> >> > > > > The patch looks fine in itself, but we've had a number of issues with
> >> > > > > the register layout (and access patterns) in the past, so I'd rather
> >> > > > > have something that works in Linux too if possible.
> >> > > >
> >> > > > I have a patch that I think should make it work fine on Linux [1], but
> >> > > > I'm afraid I have little to no capability to test it myself and so I
> >> > > > did not add it as well.
> >> > > >
> >> > > > I do know that the rootkey is offset 0x200 into the given space [2],
> >> > > > as is the case with the H3, and that the readout quirk is not needed.
> >> > > > I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
> >> > > > H3, but I do know that thermal data can be found at 0x34 and 0x38 in
> >> > > > this space.
> >> > >
> >> > > Then maybe we should leave it aside until someone takes some time on
> >> > > the A83t.
> >> >
> >> >  Take some time on the Linux driver and do not apply this patch for
> >> > now you mean ?
> >>
> >> Yep.
> >>
> >> Maxime
> >
> >  Since linux doesn't have the compatible in it's driver what would
> > be the harm to add the node in the DTS ? If a quirks is needed because
> > some region is weird this would go in the driver right ? I don't see a
> > technical problem for adding this node right now.
> >  If Kyle confirm the lenght of the region and that no quirk is needed
> > will it be enough ?
> 
> I guess I wasn't very clear. I'm OK with the patch going in. The device
> node currently says nothing about how much efuse space there is. The
> memory region covers that and the control section, and the size matches
> what the memory map says.
> 
> The size and offset of the efuse space would be dealt with in the driver.

Let's merge it then.

Acked-by: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>

Maxime

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

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Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Kyle Evans]

On Thu, Jan 4, 2018 at 8:01 AM, Maxime Ripard
<maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> On Fri, Dec 22, 2017 at 06:11:52PM +0800, Chen-Yu Tsai wrote:
>> On Fri, Dec 22, 2017 at 6:07 PM, Emmanuel Vadot <manu-xXdDKFdH5B3kFDPD4ZthVA@public.gmane.org> wrote:
>> > On Fri, 22 Dec 2017 09:35:08 +0100
>> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>> >
>> >> On Thu, Dec 21, 2017 at 07:09:03PM +0100, Emmanuel Vadot wrote:
>> >> >
>> >> >  Hi Maxime,
>> >> >
>> >> > On Thu, 21 Dec 2017 16:26:30 +0100
>> >> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>> >> >
>> >> > > Hi,
>> >> > >
>> >> > > On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
>> >> > > > On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
>> >> > > > <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>> >> > > > > Hi Kyle,
>> >> > > > >
>> >> > > > > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
>> >> > > > >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
>> >> > > > >> thermal calibration data, add node to describe it.
>> >> > > > >>
>> >> > > > >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
>> >> > > > >> supported in an external driver for FreeBSD.
>> >> > > > >>
>> >> > > > >> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
>> >> > > > >
>> >> > > > > The patch looks fine in itself, but we've had a number of issues with
>> >> > > > > the register layout (and access patterns) in the past, so I'd rather
>> >> > > > > have something that works in Linux too if possible.
>> >> > > >
>> >> > > > I have a patch that I think should make it work fine on Linux [1], but
>> >> > > > I'm afraid I have little to no capability to test it myself and so I
>> >> > > > did not add it as well.
>> >> > > >
>> >> > > > I do know that the rootkey is offset 0x200 into the given space [2],
>> >> > > > as is the case with the H3, and that the readout quirk is not needed.
>> >> > > > I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
>> >> > > > H3, but I do know that thermal data can be found at 0x34 and 0x38 in
>> >> > > > this space.
>> >> > >
>> >> > > Then maybe we should leave it aside until someone takes some time on
>> >> > > the A83t.
>> >> >
>> >> >  Take some time on the Linux driver and do not apply this patch for
>> >> > now you mean ?
>> >>
>> >> Yep.
>> >>
>> >> Maxime
>> >
>> >  Since linux doesn't have the compatible in it's driver what would
>> > be the harm to add the node in the DTS ? If a quirks is needed because
>> > some region is weird this would go in the driver right ? I don't see a
>> > technical problem for adding this node right now.
>> >  If Kyle confirm the lenght of the region and that no quirk is needed
>> > will it be enough ?
>>
>> I guess I wasn't very clear. I'm OK with the patch going in. The device
>> node currently says nothing about how much efuse space there is. The
>> memory region covers that and the control section, and the size matches
>> what the memory map says.
>>
>> The size and offset of the efuse space would be dealt with in the driver.
>
> Let's merge it then.
>
> Acked-by: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
>
> Maxime

Hi,

What does the timeline for these things normally look like? I'm new to
these parts. =)

Thanks,

Kyle Evans

Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Maxime Ripard]

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On Mon, Jan 08, 2018 at 09:30:57AM -0600, Kyle Evans wrote:
> On Thu, Jan 4, 2018 at 8:01 AM, Maxime Ripard
> <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> > On Fri, Dec 22, 2017 at 06:11:52PM +0800, Chen-Yu Tsai wrote:
> >> On Fri, Dec 22, 2017 at 6:07 PM, Emmanuel Vadot <manu-xXdDKFdH5B3kFDPD4ZthVA@public.gmane.org> wrote:
> >> > On Fri, 22 Dec 2017 09:35:08 +0100
> >> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> >> >
> >> >> On Thu, Dec 21, 2017 at 07:09:03PM +0100, Emmanuel Vadot wrote:
> >> >> >
> >> >> >  Hi Maxime,
> >> >> >
> >> >> > On Thu, 21 Dec 2017 16:26:30 +0100
> >> >> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> >> >> >
> >> >> > > Hi,
> >> >> > >
> >> >> > > On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
> >> >> > > > On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
> >> >> > > > <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> >> >> > > > > Hi Kyle,
> >> >> > > > >
> >> >> > > > > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
> >> >> > > > >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
> >> >> > > > >> thermal calibration data, add node to describe it.
> >> >> > > > >>
> >> >> > > > >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
> >> >> > > > >> supported in an external driver for FreeBSD.
> >> >> > > > >>
> >> >> > > > >> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
> >> >> > > > >
> >> >> > > > > The patch looks fine in itself, but we've had a number of issues with
> >> >> > > > > the register layout (and access patterns) in the past, so I'd rather
> >> >> > > > > have something that works in Linux too if possible.
> >> >> > > >
> >> >> > > > I have a patch that I think should make it work fine on Linux [1], but
> >> >> > > > I'm afraid I have little to no capability to test it myself and so I
> >> >> > > > did not add it as well.
> >> >> > > >
> >> >> > > > I do know that the rootkey is offset 0x200 into the given space [2],
> >> >> > > > as is the case with the H3, and that the readout quirk is not needed.
> >> >> > > > I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
> >> >> > > > H3, but I do know that thermal data can be found at 0x34 and 0x38 in
> >> >> > > > this space.
> >> >> > >
> >> >> > > Then maybe we should leave it aside until someone takes some time on
> >> >> > > the A83t.
> >> >> >
> >> >> >  Take some time on the Linux driver and do not apply this patch for
> >> >> > now you mean ?
> >> >>
> >> >> Yep.
> >> >>
> >> >> Maxime
> >> >
> >> >  Since linux doesn't have the compatible in it's driver what would
> >> > be the harm to add the node in the DTS ? If a quirks is needed because
> >> > some region is weird this would go in the driver right ? I don't see a
> >> > technical problem for adding this node right now.
> >> >  If Kyle confirm the lenght of the region and that no quirk is needed
> >> > will it be enough ?
> >>
> >> I guess I wasn't very clear. I'm OK with the patch going in. The device
> >> node currently says nothing about how much efuse space there is. The
> >> memory region covers that and the control section, and the size matches
> >> what the memory map says.
> >>
> >> The size and offset of the efuse space would be dealt with in the driver.
> >
> > Let's merge it then.
> >
> > Acked-by: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
> 
> What does the timeline for these things normally look like? I'm new to
> these parts. =)

We're one week away from the merge window, so it's a bit late for it
to be merged in 4.16, but it'll be in 4.17.

Maxime

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

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Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Kyle Evans]

On Tue, Jan 9, 2018 at 7:34 AM, Maxime Ripard
<maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> On Mon, Jan 08, 2018 at 09:30:57AM -0600, Kyle Evans wrote:
>> On Thu, Jan 4, 2018 at 8:01 AM, Maxime Ripard
>> <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>> > On Fri, Dec 22, 2017 at 06:11:52PM +0800, Chen-Yu Tsai wrote:
>> >> On Fri, Dec 22, 2017 at 6:07 PM, Emmanuel Vadot <manu-xXdDKFdH5B3kFDPD4ZthVA@public.gmane.org> wrote:
>> >> > On Fri, 22 Dec 2017 09:35:08 +0100
>> >> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>> >> >
>> >> >> On Thu, Dec 21, 2017 at 07:09:03PM +0100, Emmanuel Vadot wrote:
>> >> >> >
>> >> >> >  Hi Maxime,
>> >> >> >
>> >> >> > On Thu, 21 Dec 2017 16:26:30 +0100
>> >> >> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>> >> >> >
>> >> >> > > Hi,
>> >> >> > >
>> >> >> > > On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
>> >> >> > > > On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
>> >> >> > > > <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
>> >> >> > > > > Hi Kyle,
>> >> >> > > > >
>> >> >> > > > > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
>> >> >> > > > >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
>> >> >> > > > >> thermal calibration data, add node to describe it.
>> >> >> > > > >>
>> >> >> > > > >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
>> >> >> > > > >> supported in an external driver for FreeBSD.
>> >> >> > > > >>
>> >> >> > > > >> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
>> >> >> > > > >
>> >> >> > > > > The patch looks fine in itself, but we've had a number of issues with
>> >> >> > > > > the register layout (and access patterns) in the past, so I'd rather
>> >> >> > > > > have something that works in Linux too if possible.
>> >> >> > > >
>> >> >> > > > I have a patch that I think should make it work fine on Linux [1], but
>> >> >> > > > I'm afraid I have little to no capability to test it myself and so I
>> >> >> > > > did not add it as well.
>> >> >> > > >
>> >> >> > > > I do know that the rootkey is offset 0x200 into the given space [2],
>> >> >> > > > as is the case with the H3, and that the readout quirk is not needed.
>> >> >> > > > I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
>> >> >> > > > H3, but I do know that thermal data can be found at 0x34 and 0x38 in
>> >> >> > > > this space.
>> >> >> > >
>> >> >> > > Then maybe we should leave it aside until someone takes some time on
>> >> >> > > the A83t.
>> >> >> >
>> >> >> >  Take some time on the Linux driver and do not apply this patch for
>> >> >> > now you mean ?
>> >> >>
>> >> >> Yep.
>> >> >>
>> >> >> Maxime
>> >> >
>> >> >  Since linux doesn't have the compatible in it's driver what would
>> >> > be the harm to add the node in the DTS ? If a quirks is needed because
>> >> > some region is weird this would go in the driver right ? I don't see a
>> >> > technical problem for adding this node right now.
>> >> >  If Kyle confirm the lenght of the region and that no quirk is needed
>> >> > will it be enough ?
>> >>
>> >> I guess I wasn't very clear. I'm OK with the patch going in. The device
>> >> node currently says nothing about how much efuse space there is. The
>> >> memory region covers that and the control section, and the size matches
>> >> what the memory map says.
>> >>
>> >> The size and offset of the efuse space would be dealt with in the driver.
>> >
>> > Let's merge it then.
>> >
>> > Acked-by: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
>>
>> What does the timeline for these things normally look like? I'm new to
>> these parts. =)
>
> We're one week away from the merge window, so it's a bit late for it
> to be merged in 4.16, but it'll be in 4.17.

Ok, cool, that makes sense.

Thanks!

Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Kyle Evans]

On Tue, Jan 9, 2018 at 7:34 AM, Maxime Ripard
<maxime.ripard@free-electrons.com> wrote:
> On Mon, Jan 08, 2018 at 09:30:57AM -0600, Kyle Evans wrote:
>> On Thu, Jan 4, 2018 at 8:01 AM, Maxime Ripard
>> <maxime.ripard@free-electrons.com> wrote:
>> > On Fri, Dec 22, 2017 at 06:11:52PM +0800, Chen-Yu Tsai wrote:
>> >> On Fri, Dec 22, 2017 at 6:07 PM, Emmanuel Vadot <manu@bidouilliste.com> wrote:
>> >> > On Fri, 22 Dec 2017 09:35:08 +0100
>> >> > Maxime Ripard <maxime.ripard@free-electrons.com> wrote:
>> >> >
>> >> >> On Thu, Dec 21, 2017 at 07:09:03PM +0100, Emmanuel Vadot wrote:
>> >> >> >
>> >> >> >  Hi Maxime,
>> >> >> >
>> >> >> > On Thu, 21 Dec 2017 16:26:30 +0100
>> >> >> > Maxime Ripard <maxime.ripard@free-electrons.com> wrote:
>> >> >> >
>> >> >> > > Hi,
>> >> >> > >
>> >> >> > > On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
>> >> >> > > > On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
>> >> >> > > > <maxime.ripard@free-electrons.com> wrote:
>> >> >> > > > > Hi Kyle,
>> >> >> > > > >
>> >> >> > > > > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91@ksu.edu wrote:
>> >> >> > > > >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
>> >> >> > > > >> thermal calibration data, add node to describe it.
>> >> >> > > > >>
>> >> >> > > > >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
>> >> >> > > > >> supported in an external driver for FreeBSD.
>> >> >> > > > >>
>> >> >> > > > >> Signed-off-by: Kyle Evans <kevans91@ksu.edu>
>> >> >> > > > >
>> >> >> > > > > The patch looks fine in itself, but we've had a number of issues with
>> >> >> > > > > the register layout (and access patterns) in the past, so I'd rather
>> >> >> > > > > have something that works in Linux too if possible.
>> >> >> > > >
>> >> >> > > > I have a patch that I think should make it work fine on Linux [1], but
>> >> >> > > > I'm afraid I have little to no capability to test it myself and so I
>> >> >> > > > did not add it as well.
>> >> >> > > >
>> >> >> > > > I do know that the rootkey is offset 0x200 into the given space [2],
>> >> >> > > > as is the case with the H3, and that the readout quirk is not needed.
>> >> >> > > > I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
>> >> >> > > > H3, but I do know that thermal data can be found at 0x34 and 0x38 in
>> >> >> > > > this space.
>> >> >> > >
>> >> >> > > Then maybe we should leave it aside until someone takes some time on
>> >> >> > > the A83t.
>> >> >> >
>> >> >> >  Take some time on the Linux driver and do not apply this patch for
>> >> >> > now you mean ?
>> >> >>
>> >> >> Yep.
>> >> >>
>> >> >> Maxime
>> >> >
>> >> >  Since linux doesn't have the compatible in it's driver what would
>> >> > be the harm to add the node in the DTS ? If a quirks is needed because
>> >> > some region is weird this would go in the driver right ? I don't see a
>> >> > technical problem for adding this node right now.
>> >> >  If Kyle confirm the lenght of the region and that no quirk is needed
>> >> > will it be enough ?
>> >>
>> >> I guess I wasn't very clear. I'm OK with the patch going in. The device
>> >> node currently says nothing about how much efuse space there is. The
>> >> memory region covers that and the control section, and the size matches
>> >> what the memory map says.
>> >>
>> >> The size and offset of the efuse space would be dealt with in the driver.
>> >
>> > Let's merge it then.
>> >
>> > Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
>>
>> What does the timeline for these things normally look like? I'm new to
>> these parts. =)
>
> We're one week away from the merge window, so it's a bit late for it
> to be merged in 4.16, but it'll be in 4.17.
>
> Maxime
>

Hi,

It's been two months and this still hasn't quite landed in
sunxi/for-next. =( May I ask the status on this?

Thanks,

Kyle Evans

Re: [PATCH v2] ARM: dts: sunxi: Add sid for a83t

[Maxime Ripard]

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On Wed, Apr 18, 2018 at 09:05:19AM -0500, Kyle Evans wrote:
> On Tue, Jan 9, 2018 at 7:34 AM, Maxime Ripard
> <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> > On Mon, Jan 08, 2018 at 09:30:57AM -0600, Kyle Evans wrote:
> >> On Thu, Jan 4, 2018 at 8:01 AM, Maxime Ripard
> >> <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> >> > On Fri, Dec 22, 2017 at 06:11:52PM +0800, Chen-Yu Tsai wrote:
> >> >> On Fri, Dec 22, 2017 at 6:07 PM, Emmanuel Vadot <manu-xXdDKFdH5B3kFDPD4ZthVA@public.gmane.org> wrote:
> >> >> > On Fri, 22 Dec 2017 09:35:08 +0100
> >> >> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> >> >> >
> >> >> >> On Thu, Dec 21, 2017 at 07:09:03PM +0100, Emmanuel Vadot wrote:
> >> >> >> >
> >> >> >> >  Hi Maxime,
> >> >> >> >
> >> >> >> > On Thu, 21 Dec 2017 16:26:30 +0100
> >> >> >> > Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> >> >> >> >
> >> >> >> > > Hi,
> >> >> >> > >
> >> >> >> > > On Thu, Dec 21, 2017 at 09:19:24AM -0600, Kyle Evans wrote:
> >> >> >> > > > On Thu, Dec 21, 2017 at 8:55 AM, Maxime Ripard
> >> >> >> > > > <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> >> >> >> > > > > Hi Kyle,
> >> >> >> > > > >
> >> >> >> > > > > On Tue, Dec 19, 2017 at 03:05:23PM -0600, kevans91-OYTqUY/oFF8@public.gmane.org wrote:
> >> >> >> > > > >> Allwinner a83t has a 1 KB sid block with efuse for security rootkey and
> >> >> >> > > > >> thermal calibration data, add node to describe it.
> >> >> >> > > > >>
> >> >> >> > > > >> a83t-sid is not currently supported by nvmem/sunxi-sid, but it is
> >> >> >> > > > >> supported in an external driver for FreeBSD.
> >> >> >> > > > >>
> >> >> >> > > > >> Signed-off-by: Kyle Evans <kevans91-OYTqUY/oFF8@public.gmane.org>
> >> >> >> > > > >
> >> >> >> > > > > The patch looks fine in itself, but we've had a number of issues with
> >> >> >> > > > > the register layout (and access patterns) in the past, so I'd rather
> >> >> >> > > > > have something that works in Linux too if possible.
> >> >> >> > > >
> >> >> >> > > > I have a patch that I think should make it work fine on Linux [1], but
> >> >> >> > > > I'm afraid I have little to no capability to test it myself and so I
> >> >> >> > > > did not add it as well.
> >> >> >> > > >
> >> >> >> > > > I do know that the rootkey is offset 0x200 into the given space [2],
> >> >> >> > > > as is the case with the H3, and that the readout quirk is not needed.
> >> >> >> > > > I wasn't 100% sure that the a83t has 2Kbit worth of efuse space as the
> >> >> >> > > > H3, but I do know that thermal data can be found at 0x34 and 0x38 in
> >> >> >> > > > this space.
> >> >> >> > >
> >> >> >> > > Then maybe we should leave it aside until someone takes some time on
> >> >> >> > > the A83t.
> >> >> >> >
> >> >> >> >  Take some time on the Linux driver and do not apply this patch for
> >> >> >> > now you mean ?
> >> >> >>
> >> >> >> Yep.
> >> >> >>
> >> >> >> Maxime
> >> >> >
> >> >> >  Since linux doesn't have the compatible in it's driver what would
> >> >> > be the harm to add the node in the DTS ? If a quirks is needed because
> >> >> > some region is weird this would go in the driver right ? I don't see a
> >> >> > technical problem for adding this node right now.
> >> >> >  If Kyle confirm the lenght of the region and that no quirk is needed
> >> >> > will it be enough ?
> >> >>
> >> >> I guess I wasn't very clear. I'm OK with the patch going in. The device
> >> >> node currently says nothing about how much efuse space there is. The
> >> >> memory region covers that and the control section, and the size matches
> >> >> what the memory map says.
> >> >>
> >> >> The size and offset of the efuse space would be dealt with in the driver.
> >> >
> >> > Let's merge it then.
> >> >
> >> > Acked-by: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
> >>
> >> What does the timeline for these things normally look like? I'm new to
> >> these parts. =)
> >
> > We're one week away from the merge window, so it's a bit late for it
> > to be merged in 4.16, but it'll be in 4.17.

> It's been two months and this still hasn't quite landed in
> sunxi/for-next. =( May I ask the status on this?

It seems to have fallen through the cracks, sorry :/

Can you resend it based on 4.17?

Thanks!
Maxime

-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com