On 2022/11/23, 4:27 PM, "Krzysztof Kozlowski" <krzysztof.kozlowski@xxxxxxxxxx> wrote:
On 23/11/2022 09:24, Krzysztof Kozlowski wrote:
> > On 23/11/2022 07:16, Billy Tsai wrote:
> >> Add device binding for aspeed pwm-tach device which is a multi-function
> >> device include pwm and tach function.
> >
> > Subject: drop second, redundant "bindings".
> > Also use proper PATCH prefix.
> >
> >>
> >> Signed-off-by: Billy Tsai <billy_tsai@xxxxxxxxxxxxxx>
> >> ---
> >> .../bindings/mfd/aspeed,ast2600-pwm-tach.yaml | 73 +++++++++++++++++++
> >> 1 file changed, 73 insertions(+)
> >> create mode 100644 Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml
> >>
> >> diff --git a/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml
> >> new file mode 100644
> >> index 000000000000..e2a7be2e0a18
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml
> >> @@ -0,0 +1,73 @@
> >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> >> +# Copyright (C) 2021 Aspeed, Inc.
> >> +%YAML 1.2
> >> +---
> >> +$id: http://devicetree.org/schemas/mfd/aspeed,ast2600-pwm-tach.yaml#
> >> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> >> +
> >> +title: PWM Tach controller
> >> +
> >> +description: |
> >> + The PWM Tach controller is represented as a multi-function device which
> >> + includes:
> >> + PWM
> >> + Tach
> >> +
> >> +maintainers:
> >> + - Billy Tsai <billy_tsai@xxxxxxxxxxxxxx>
> >> +
> >> +properties:
> >> + compatible:
> >> + items:
> >> + - enum:
> >> + - aspeed,ast2600-pwm-tach
> >> + - const: syscon
> >> + - const: simple-mfd
> >> +
> >> + reg:
> >> + maxItems: 1
> >> +
> >> + clocks:
> >> + maxItems: 1
> >> +
> >> + resets:
> >> + maxItems: 1
> >
> > If this is simple-mfd then it cannot take clocks or resets. Usually the
> > recommendation for such case is: This is not simple-mfd, drop it. Drop
> > also syscon and make a proper device.
> >
> > However I am surprised to see such change, so I have no clue why this
> > was done.
> Actually now I see it was like that in previous patch, I just missed it
> during previous review. Anyway this must be fixed.
I have two module (PWM and TACH) but share with the same base address,
The PWM will use the offset (N*0x10) + 0x0 and 0x04.
The TACH will use the offset (N*0x10) + 0x8 and 0x0c.
The range of the N is 0~15.
Can you give me some advice to fix this problem without using simple-mfd?
Thanks
Best Regards,
Billy Tsai
