| Message ID | 20200519083716.938384-5-kamel.bouhara@bootlin.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Microchip TCB Capture driver | expand |
On Tue, 19 May 2020 10:37:15 +0200, Kamel Bouhara wrote: > Describe the devicetree binding for the Microchip TCB module. > Each counter blocks exposes three independent counters. > > However, when configured in quadrature decoder, both channel <0> and <1> > are required for speed/position and rotation capture (yet only the > position is captured). > > Signed-off-by: Kamel Bouhara <kamel.bouhara@bootlin.com> > --- > .../soc/microchip/atmel,at91rm9200-tcb.yaml | 32 +++++++++++++++++-- > 1 file changed, 29 insertions(+), 3 deletions(-) > Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml b/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml index 38403760f64d..e3319c4501c1 100644 --- a/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml +++ b/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml @@ -52,14 +52,20 @@ properties: patternProperties: "^timer@[0-2]$": - description: The timer block channels that are used as timers. + description: The timer block channels that are used as timers or counters. type: object properties: compatible: - const: atmel,tcb-timer + items: + - enum: + - atmel,tcb-timer + - microchip,tcb-capture reg: description: - List of channels to use for this particular timer. + List of channels to use for this particular timer. In Microchip TCB capture + mode channels are registered as a counter devices, for the qdec mode TCB0's + channel <0> and <1> are required. + minItems: 1 maxItems: 3 @@ -148,3 +154,23 @@ examples: reg = <1>; }; }; + /* TCB0 Capture with QDEC: */ + timer@f800c000 { + compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0xfff7c000 0x100>; + interrupts = <18 4>; + clocks = <&tcb0_clk>, <&clk32k>; + clock-names = "t0_clk", "slow_clk"; + + timer@0 { + compatible = "microchip,tcb-capture"; + reg = <0>, <1>; + }; + + timer@2 { + compatible = "atmel,tcb-timer"; + reg = <2>; + }; + };
Describe the devicetree binding for the Microchip TCB module. Each counter blocks exposes three independent counters. However, when configured in quadrature decoder, both channel <0> and <1> are required for speed/position and rotation capture (yet only the position is captured). Signed-off-by: Kamel Bouhara <kamel.bouhara@bootlin.com> --- .../soc/microchip/atmel,at91rm9200-tcb.yaml | 32 +++++++++++++++++-- 1 file changed, 29 insertions(+), 3 deletions(-)