diff mbox series

dt-bindings: input: touchscreen: edt-ft5x06: change reg property

Message ID 20200520073327.6016-1-jbx6244@gmail.com
State Accepted
Headers show
Series dt-bindings: input: touchscreen: edt-ft5x06: change reg property | expand

Checks

Context Check Description
robh/dt-meta-schema success
robh/checkpatch success

Commit Message

Johan Jonker May 20, 2020, 7:33 a.m. UTC
A test with the command below gives this error:

arch/arm/boot/dts/rk3188-bqedison2qc.dt.yaml:
touchscreen@3e: reg:0:0: 56 was expected

The touchscreen chip on 'rk3188-bqedison2qc' and other BQ models
was shipped with different addresses then the binding currently allows.
Change the reg property that any address will pass.

make ARCH=arm dtbs_check
DT_SCHEMA_FILES=Documentation/devicetree/bindings/input/touchscreen/
edt-ft5x06.yaml

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
---
 Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Dmitry Torokhov May 20, 2020, 5:13 p.m. UTC | #1
Hi Johan,

On Wed, May 20, 2020 at 09:33:27AM +0200, Johan Jonker wrote:
> A test with the command below gives this error:
> 
> arch/arm/boot/dts/rk3188-bqedison2qc.dt.yaml:
> touchscreen@3e: reg:0:0: 56 was expected
> 
> The touchscreen chip on 'rk3188-bqedison2qc' and other BQ models
> was shipped with different addresses then the binding currently allows.
> Change the reg property that any address will pass.
> 
> make ARCH=arm dtbs_check
> DT_SCHEMA_FILES=Documentation/devicetree/bindings/input/touchscreen/
> edt-ft5x06.yaml
> 
> Signed-off-by: Johan Jonker <jbx6244@gmail.com>
> ---
>  Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> index 383d64a91..baa8e8f7e 100644
> --- a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> +++ b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> @@ -42,7 +42,7 @@ properties:
>        - focaltech,ft6236
>  
>    reg:
> -    const: 0x38
> +    maxItems: 1

Should we have a list of valid addresses instead of allowing any
address? Controllers usually have only a couple of addresses that they
support.

Thanks.
Heiko Stuebner May 20, 2020, 6:41 p.m. UTC | #2
Hi Dmitry,

Am Mittwoch, 20. Mai 2020, 19:13:24 CEST schrieb Dmitry Torokhov:
> Hi Johan,
> 
> On Wed, May 20, 2020 at 09:33:27AM +0200, Johan Jonker wrote:
> > A test with the command below gives this error:
> > 
> > arch/arm/boot/dts/rk3188-bqedison2qc.dt.yaml:
> > touchscreen@3e: reg:0:0: 56 was expected
> > 
> > The touchscreen chip on 'rk3188-bqedison2qc' and other BQ models
> > was shipped with different addresses then the binding currently allows.
> > Change the reg property that any address will pass.
> > 
> > make ARCH=arm dtbs_check
> > DT_SCHEMA_FILES=Documentation/devicetree/bindings/input/touchscreen/
> > edt-ft5x06.yaml
> > 
> > Signed-off-by: Johan Jonker <jbx6244@gmail.com>
> > ---
> >  Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> > index 383d64a91..baa8e8f7e 100644
> > --- a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> > +++ b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> > @@ -42,7 +42,7 @@ properties:
> >        - focaltech,ft6236
> >  
> >    reg:
> > -    const: 0x38
> > +    maxItems: 1
> 
> Should we have a list of valid addresses instead of allowing any
> address? Controllers usually have only a couple of addresses that they
> support.

from what I've read, the fdt touchscreen controllers are just a generic
cpu with device-specific (or better panel-specific) firmware, which seems
to include the address as well - so it looks to be variable.

But of course that is only 2nd hand knowledge for me ;-)


But also, the i2c address is something you cannot really mess up,
either it is correct and your touchscreen works, or it isn't and and
adding entries to this list every time a new address variant pops up
feels clumsy.


Heiko
Rob Herring May 28, 2020, 10:01 p.m. UTC | #3
On Wed, May 20, 2020 at 08:41:59PM +0200, Heiko Stübner wrote:
> Hi Dmitry,
> 
> Am Mittwoch, 20. Mai 2020, 19:13:24 CEST schrieb Dmitry Torokhov:
> > Hi Johan,
> > 
> > On Wed, May 20, 2020 at 09:33:27AM +0200, Johan Jonker wrote:
> > > A test with the command below gives this error:
> > > 
> > > arch/arm/boot/dts/rk3188-bqedison2qc.dt.yaml:
> > > touchscreen@3e: reg:0:0: 56 was expected
> > > 
> > > The touchscreen chip on 'rk3188-bqedison2qc' and other BQ models
> > > was shipped with different addresses then the binding currently allows.
> > > Change the reg property that any address will pass.
> > > 
> > > make ARCH=arm dtbs_check
> > > DT_SCHEMA_FILES=Documentation/devicetree/bindings/input/touchscreen/
> > > edt-ft5x06.yaml
> > > 
> > > Signed-off-by: Johan Jonker <jbx6244@gmail.com>
> > > ---
> > >  Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> > > index 383d64a91..baa8e8f7e 100644
> > > --- a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> > > +++ b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> > > @@ -42,7 +42,7 @@ properties:
> > >        - focaltech,ft6236
> > >  
> > >    reg:
> > > -    const: 0x38
> > > +    maxItems: 1
> > 
> > Should we have a list of valid addresses instead of allowing any
> > address? Controllers usually have only a couple of addresses that they
> > support.
> 
> from what I've read, the fdt touchscreen controllers are just a generic
> cpu with device-specific (or better panel-specific) firmware, which seems
> to include the address as well - so it looks to be variable.
> 
> But of course that is only 2nd hand knowledge for me ;-)
> 
> 
> But also, the i2c address is something you cannot really mess up,
> either it is correct and your touchscreen works, or it isn't and and
> adding entries to this list every time a new address variant pops up
> feels clumsy.

Is that an Ack?

I'm fine either way. It's really only useful if there's a single 
address because with a list it could still be wrong just as any other 
data like an interrupt number could be wrong.

Rob
Heiko Stuebner May 28, 2020, 10:02 p.m. UTC | #4
Am Freitag, 29. Mai 2020, 00:01:36 CEST schrieb Rob Herring:
> On Wed, May 20, 2020 at 08:41:59PM +0200, Heiko Stübner wrote:
> > Hi Dmitry,
> > 
> > Am Mittwoch, 20. Mai 2020, 19:13:24 CEST schrieb Dmitry Torokhov:
> > > Hi Johan,
> > > 
> > > On Wed, May 20, 2020 at 09:33:27AM +0200, Johan Jonker wrote:
> > > > A test with the command below gives this error:
> > > > 
> > > > arch/arm/boot/dts/rk3188-bqedison2qc.dt.yaml:
> > > > touchscreen@3e: reg:0:0: 56 was expected
> > > > 
> > > > The touchscreen chip on 'rk3188-bqedison2qc' and other BQ models
> > > > was shipped with different addresses then the binding currently allows.
> > > > Change the reg property that any address will pass.
> > > > 
> > > > make ARCH=arm dtbs_check
> > > > DT_SCHEMA_FILES=Documentation/devicetree/bindings/input/touchscreen/
> > > > edt-ft5x06.yaml
> > > > 
> > > > Signed-off-by: Johan Jonker <jbx6244@gmail.com>
> > > > ---
> > > >  Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml | 2 +-
> > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > 
> > > > diff --git a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> > > > index 383d64a91..baa8e8f7e 100644
> > > > --- a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> > > > +++ b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
> > > > @@ -42,7 +42,7 @@ properties:
> > > >        - focaltech,ft6236
> > > >  
> > > >    reg:
> > > > -    const: 0x38
> > > > +    maxItems: 1
> > > 
> > > Should we have a list of valid addresses instead of allowing any
> > > address? Controllers usually have only a couple of addresses that they
> > > support.
> > 
> > from what I've read, the fdt touchscreen controllers are just a generic
> > cpu with device-specific (or better panel-specific) firmware, which seems
> > to include the address as well - so it looks to be variable.
> > 
> > But of course that is only 2nd hand knowledge for me ;-)
> > 
> > 
> > But also, the i2c address is something you cannot really mess up,
> > either it is correct and your touchscreen works, or it isn't and and
> > adding entries to this list every time a new address variant pops up
> > feels clumsy.
> 
> Is that an Ack?

for the patch itself:
Acked-by: Heiko Stuebner <heiko@sntech.de>


> I'm fine either way. It's really only useful if there's a single 
> address because with a list it could still be wrong just as any other 
> data like an interrupt number could be wrong.
> 
> Rob
>
Rob Herring May 29, 2020, 5:07 p.m. UTC | #5
On Wed, 20 May 2020 09:33:27 +0200, Johan Jonker wrote:
> A test with the command below gives this error:
> 
> arch/arm/boot/dts/rk3188-bqedison2qc.dt.yaml:
> touchscreen@3e: reg:0:0: 56 was expected
> 
> The touchscreen chip on 'rk3188-bqedison2qc' and other BQ models
> was shipped with different addresses then the binding currently allows.
> Change the reg property that any address will pass.
> 
> make ARCH=arm dtbs_check
> DT_SCHEMA_FILES=Documentation/devicetree/bindings/input/touchscreen/
> edt-ft5x06.yaml
> 
> Signed-off-by: Johan Jonker <jbx6244@gmail.com>
> ---
>  Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Applied, thanks!
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
index 383d64a91..baa8e8f7e 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
+++ b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml
@@ -42,7 +42,7 @@  properties:
       - focaltech,ft6236
 
   reg:
-    const: 0x38
+    maxItems: 1
 
   interrupts:
     maxItems: 1