* [PATCH v1 1/3] dt-bindings: fu540: prci: convert PRCI bindings to json-schema
2020-09-10 10:44 [PATCH v1 0/3] convert sifive's prci, plic and pwm bindings to yaml Sagar Kadam
@ 2020-09-10 10:44 ` Sagar Kadam
2020-09-15 0:07 ` Stephen Boyd
2020-09-10 10:44 ` [PATCH v1 2/3] dt-bindings: riscv: convert plic " Sagar Kadam
2020-09-10 10:44 ` [PATCH v1 3/3] dt-bindings: riscv: convert pwm " Sagar Kadam
2 siblings, 1 reply; 12+ messages in thread
From: Sagar Kadam @ 2020-09-10 10:44 UTC (permalink / raw)
To: linux-pwm, linux-kernel, linux-riscv, devicetree, linux-clk
Cc: mturquette, sboyd, robh+dt, paul.walmsley, palmer, tglx, jason,
maz, thierry.reding, u.kleine-koenig, lee.jones, aou, yash.shah,
Sagar Kadam
FU540-C000 SoC from SiFive has a PRCI block, here we convert
the device tree bindings from txt to YAML.
Signed-off-by: Sagar Kadam <sagar.kadam@sifive.com>
---
.../bindings/clock/sifive/fu540-prci.txt | 46 -------------
.../bindings/clock/sifive/fu540-prci.yaml | 75 ++++++++++++++++++++++
2 files changed, 75 insertions(+), 46 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/clock/sifive/fu540-prci.txt
create mode 100644 Documentation/devicetree/bindings/clock/sifive/fu540-prci.yaml
diff --git a/Documentation/devicetree/bindings/clock/sifive/fu540-prci.txt b/Documentation/devicetree/bindings/clock/sifive/fu540-prci.txt
deleted file mode 100644
index 349808f..0000000
--- a/Documentation/devicetree/bindings/clock/sifive/fu540-prci.txt
+++ /dev/null
@@ -1,46 +0,0 @@
-SiFive FU540 PRCI bindings
-
-On the FU540 family of SoCs, most system-wide clock and reset integration
-is via the PRCI IP block.
-
-Required properties:
-- compatible: Should be "sifive,<chip>-prci". Only one value is
- supported: "sifive,fu540-c000-prci"
-- reg: Should describe the PRCI's register target physical address region
-- clocks: Should point to the hfclk device tree node and the rtcclk
- device tree node. The RTC clock here is not a time-of-day clock,
- but is instead a high-stability clock source for system timers
- and cycle counters.
-- #clock-cells: Should be <1>
-
-The clock consumer should specify the desired clock via the clock ID
-macros defined in include/dt-bindings/clock/sifive-fu540-prci.h.
-These macros begin with PRCI_CLK_.
-
-The hfclk and rtcclk nodes are required, and represent physical
-crystals or resonators located on the PCB. These nodes should be present
-underneath /, rather than /soc.
-
-Examples:
-
-/* under /, in PCB-specific DT data */
-hfclk: hfclk {
- #clock-cells = <0>;
- compatible = "fixed-clock";
- clock-frequency = <33333333>;
- clock-output-names = "hfclk";
-};
-rtcclk: rtcclk {
- #clock-cells = <0>;
- compatible = "fixed-clock";
- clock-frequency = <1000000>;
- clock-output-names = "rtcclk";
-};
-
-/* under /soc, in SoC-specific DT data */
-prci: clock-controller@10000000 {
- compatible = "sifive,fu540-c000-prci";
- reg = <0x0 0x10000000 0x0 0x1000>;
- clocks = <&hfclk>, <&rtcclk>;
- #clock-cells = <1>;
-};
diff --git a/Documentation/devicetree/bindings/clock/sifive/fu540-prci.yaml b/Documentation/devicetree/bindings/clock/sifive/fu540-prci.yaml
new file mode 100644
index 0000000..49386cd
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/sifive/fu540-prci.yaml
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2020 SiFive, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/sifive/fu540-prci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SiFive FU540 Power Reset Clock Interrupt Controller (PRCI)
+
+maintainers:
+ - Sagar Kadam <sagar.kadam@sifive.com>
+ - Paul Walmsley <paul.walmsley@sifive.com>
+
+description:
+ On the FU540 family of SoCs, most system-wide clock and reset integration
+ is via the PRCI IP block.
+ The clock consumer should specify the desired clock via the clock ID
+ macros defined in include/dt-bindings/clock/sifive-fu540-prci.h.
+ These macros begin with PRCI_CLK_.
+
+ The hfclk and rtcclk nodes are required, and represent physical
+ crystals or resonators located on the PCB. These nodes should be present
+ underneath /, rather than /soc.
+
+properties:
+ compatible:
+ enum:
+ - sifive,fu540-c000-prci
+ description:
+ Should have "sifive,<soc>-prci", only one value is supported
+
+ reg:
+ maxItems: 1
+ description: Describe the PRCI's register target physical address region
+
+ clocks:
+ description:
+ Should point to the hfclk device tree node and the rtcclk device tree node.
+ The RTC clock here is not a time-of-day clock, but is instead a high-stability
+ clock source for system timers and cycle counters.
+
+ "#clock-cells":
+ const: 1
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - "#clock-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ //hfclk and rtcclk present under /, in PCB-specific DT data
+ hfclk: hfclk {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <33333333>;
+ clock-output-names = "hfclk";
+ };
+ rtcclk: rtcclk {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <1000000>;
+ clock-output-names = "rtcclk";
+ };
+
+ //under /soc, in SoC-specific DT data
+ prci: clock-controller@10000000 {
+ compatible = "sifive,fu540-c000-prci";
+ reg = <0x10000000 0x1000>;
+ clocks = <&hfclk>, <&rtcclk>;
+ #clock-cells = <1>;
+ };
--
2.7.4
^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [PATCH v1 1/3] dt-bindings: fu540: prci: convert PRCI bindings to json-schema
2020-09-10 10:44 ` [PATCH v1 1/3] dt-bindings: fu540: prci: convert PRCI bindings to json-schema Sagar Kadam
@ 2020-09-15 0:07 ` Stephen Boyd
2020-09-15 16:08 ` Sagar Kadam
0 siblings, 1 reply; 12+ messages in thread
From: Stephen Boyd @ 2020-09-15 0:07 UTC (permalink / raw)
To: Sagar Kadam, devicetree, linux-clk, linux-kernel, linux-pwm, linux-riscv
Cc: mturquette, robh+dt, paul.walmsley, palmer, tglx, jason, maz,
thierry.reding, u.kleine-koenig, lee.jones, aou, yash.shah,
Sagar Kadam
Quoting Sagar Kadam (2020-09-10 03:44:02)
> diff --git a/Documentation/devicetree/bindings/clock/sifive/fu540-prci.yaml b/Documentation/devicetree/bindings/clock/sifive/fu540-prci.yaml
> new file mode 100644
> index 0000000..49386cd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/sifive/fu540-prci.yaml
> @@ -0,0 +1,75 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2020 SiFive, Inc.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/sifive/fu540-prci.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: SiFive FU540 Power Reset Clock Interrupt Controller (PRCI)
> +
> +maintainers:
> + - Sagar Kadam <sagar.kadam@sifive.com>
> + - Paul Walmsley <paul.walmsley@sifive.com>
> +
> +description:
> + On the FU540 family of SoCs, most system-wide clock and reset integration
> + is via the PRCI IP block.
> + The clock consumer should specify the desired clock via the clock ID
> + macros defined in include/dt-bindings/clock/sifive-fu540-prci.h.
> + These macros begin with PRCI_CLK_.
> +
> + The hfclk and rtcclk nodes are required, and represent physical
> + crystals or resonators located on the PCB. These nodes should be present
> + underneath /, rather than /soc.
> +
> +properties:
> + compatible:
> + enum:
> + - sifive,fu540-c000-prci
> + description:
> + Should have "sifive,<soc>-prci", only one value is supported
Drop description and have
compatible:
const: sifive,fu540-c000-prci
> +
> + reg:
> + maxItems: 1
> + description: Describe the PRCI's register target physical address region
Drop description.
> +
> + clocks:
> + description:
> + Should point to the hfclk device tree node and the rtcclk device tree node.
s/device tree node//g
> + The RTC clock here is not a time-of-day clock, but is instead a high-stability
> + clock source for system timers and cycle counters.
Better to have:
clocks:
items:
- const: high frequency clock
- const: RTC clock
Can you add clock-names too? Making it optional is OK.
> + "#clock-cells":
> + const: 1
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - "#clock-cells"
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + //hfclk and rtcclk present under /, in PCB-specific DT data
> + hfclk: hfclk {
> + #clock-cells = <0>;
> + compatible = "fixed-clock";
> + clock-frequency = <33333333>;
> + clock-output-names = "hfclk";
> + };
Add a newline here?
> + rtcclk: rtcclk {
> + #clock-cells = <0>;
> + compatible = "fixed-clock";
> + clock-frequency = <1000000>;
> + clock-output-names = "rtcclk";
> + };
These may not be necessary either, just have the clock-controller node
reference phandles?
> +
> + //under /soc, in SoC-specific DT data
Don't think this comment is necessary.
> + prci: clock-controller@10000000 {
> + compatible = "sifive,fu540-c000-prci";
> + reg = <0x10000000 0x1000>;
> + clocks = <&hfclk>, <&rtcclk>;
> + #clock-cells = <1>;
> + };
^ permalink raw reply [flat|nested] 12+ messages in thread* RE: [PATCH v1 1/3] dt-bindings: fu540: prci: convert PRCI bindings to json-schema
2020-09-15 0:07 ` Stephen Boyd
@ 2020-09-15 16:08 ` Sagar Kadam
0 siblings, 0 replies; 12+ messages in thread
From: Sagar Kadam @ 2020-09-15 16:08 UTC (permalink / raw)
To: Stephen Boyd, devicetree, linux-clk, linux-kernel, linux-pwm,
linux-riscv
Cc: mturquette, robh+dt, Paul Walmsley ( Sifive),
palmer, tglx, jason, maz, thierry.reding, u.kleine-koenig,
lee.jones, aou, Yash Shah
Hello Stephen,
> -----Original Message-----
> From: Stephen Boyd <sboyd@kernel.org>
> Sent: Tuesday, September 15, 2020 5:37 AM
> To: Sagar Kadam <sagar.kadam@openfive.com>;
> devicetree@vger.kernel.org; linux-clk@vger.kernel.org; linux-
> kernel@vger.kernel.org; linux-pwm@vger.kernel.org; linux-
> riscv@lists.infradead.org
> Cc: mturquette@baylibre.com; robh+dt@kernel.org; Paul Walmsley ( Sifive)
> <paul.walmsley@sifive.com>; palmer@dabbelt.com; tglx@linutronix.de;
> jason@lakedaemon.net; maz@kernel.org; thierry.reding@gmail.com;
> u.kleine-koenig@pengutronix.de; lee.jones@linaro.org;
> aou@eecs.berkeley.edu; Yash Shah <yash.shah@openfive.com>; Sagar
> Kadam <sagar.kadam@openfive.com>
> Subject: Re: [PATCH v1 1/3] dt-bindings: fu540: prci: convert PRCI bindings
> to json-schema
>
> [External Email] Do not click links or attachments unless you recognize the
> sender and know the content is safe
>
> Quoting Sagar Kadam (2020-09-10 03:44:02)
> > diff --git
> > a/Documentation/devicetree/bindings/clock/sifive/fu540-prci.yaml
> > b/Documentation/devicetree/bindings/clock/sifive/fu540-prci.yaml
> > new file mode 100644
> > index 0000000..49386cd
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/clock/sifive/fu540-prci.yaml
> > @@ -0,0 +1,75 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) # Copyright
> > +(C) 2020 SiFive, Inc.
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/clock/sifive/fu540-prci.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: SiFive FU540 Power Reset Clock Interrupt Controller (PRCI)
> > +
> > +maintainers:
> > + - Sagar Kadam <sagar.kadam@sifive.com>
> > + - Paul Walmsley <paul.walmsley@sifive.com>
> > +
> > +description:
> > + On the FU540 family of SoCs, most system-wide clock and reset
> > +integration
> > + is via the PRCI IP block.
> > + The clock consumer should specify the desired clock via the clock
> > +ID
> > + macros defined in include/dt-bindings/clock/sifive-fu540-prci.h.
> > + These macros begin with PRCI_CLK_.
> > +
> > + The hfclk and rtcclk nodes are required, and represent physical
> > + crystals or resonators located on the PCB. These nodes should be
> > + present underneath /, rather than /soc.
> > +
> > +properties:
> > + compatible:
> > + enum:
> > + - sifive,fu540-c000-prci
> > + description:
> > + Should have "sifive,<soc>-prci", only one value is supported
>
> Drop description and have
>
> compatible:
> const: sifive,fu540-c000-prci
>
Thank you for suggestion here, I will remove this.
> > +
> > + reg:
> > + maxItems: 1
> > + description: Describe the PRCI's register target physical address
> > + region
>
> Drop description.
>
Okay.
> > +
> > + clocks:
> > + description:
> > + Should point to the hfclk device tree node and the rtcclk device tree
> node.
>
> s/device tree node//g
Okay, will remove these.
>
> > + The RTC clock here is not a time-of-day clock, but is instead a high-
> stability
> > + clock source for system timers and cycle counters.
>
> Better to have:
>
> clocks:
> items:
> - const: high frequency clock
> - const: RTC clock
>
> Can you add clock-names too? Making it optional is OK.
Okay, I will include these optional properties as
-const: "hfclk"
-const: "rtcclk"
>
> > + "#clock-cells":
> > + const: 1
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - clocks
> > + - "#clock-cells"
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + //hfclk and rtcclk present under /, in PCB-specific DT data
> > + hfclk: hfclk {
> > + #clock-cells = <0>;
> > + compatible = "fixed-clock";
> > + clock-frequency = <33333333>;
> > + clock-output-names = "hfclk";
> > + };
>
> Add a newline here?
>
Okay.
> > + rtcclk: rtcclk {
> > + #clock-cells = <0>;
> > + compatible = "fixed-clock";
> > + clock-frequency = <1000000>;
> > + clock-output-names = "rtcclk";
> > + };
>
> These may not be necessary either, just have the clock-controller node
> reference phandles?
>
Okay.
> > +
> > + //under /soc, in SoC-specific DT data
>
> Don't think this comment is necessary.
>
Okay.
Thanks & BR,
Sagar
> > + prci: clock-controller@10000000 {
> > + compatible = "sifive,fu540-c000-prci";
> > + reg = <0x10000000 0x1000>;
> > + clocks = <&hfclk>, <&rtcclk>;
> > + #clock-cells = <1>;
> > + };
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH v1 2/3] dt-bindings: riscv: convert plic bindings to json-schema
2020-09-10 10:44 [PATCH v1 0/3] convert sifive's prci, plic and pwm bindings to yaml Sagar Kadam
2020-09-10 10:44 ` [PATCH v1 1/3] dt-bindings: fu540: prci: convert PRCI bindings to json-schema Sagar Kadam
@ 2020-09-10 10:44 ` Sagar Kadam
2020-09-22 20:34 ` Rob Herring
2020-09-10 10:44 ` [PATCH v1 3/3] dt-bindings: riscv: convert pwm " Sagar Kadam
2 siblings, 1 reply; 12+ messages in thread
From: Sagar Kadam @ 2020-09-10 10:44 UTC (permalink / raw)
To: linux-pwm, linux-kernel, linux-riscv, devicetree, linux-clk
Cc: mturquette, sboyd, robh+dt, paul.walmsley, palmer, tglx, jason,
maz, thierry.reding, u.kleine-koenig, lee.jones, aou, yash.shah,
Sagar Kadam
Convert device tree bindings for SiFive's PLIC to YAML format
Signed-off-by: Sagar Kadam <sagar.kadam@sifive.com>
---
.../interrupt-controller/sifive,plic-1.0.0.txt | 58 -----------
.../interrupt-controller/sifive,plic-1.0.0.yaml | 107 +++++++++++++++++++++
2 files changed, 107 insertions(+), 58 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.txt
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
diff --git a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.txt b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.txt
deleted file mode 100644
index 6adf7a6..0000000
--- a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.txt
+++ /dev/null
@@ -1,58 +0,0 @@
-SiFive Platform-Level Interrupt Controller (PLIC)
--------------------------------------------------
-
-SiFive SOCs include an implementation of the Platform-Level Interrupt Controller
-(PLIC) high-level specification in the RISC-V Privileged Architecture
-specification. The PLIC connects all external interrupts in the system to all
-hart contexts in the system, via the external interrupt source in each hart.
-
-A hart context is a privilege mode in a hardware execution thread. For example,
-in an 4 core system with 2-way SMT, you have 8 harts and probably at least two
-privilege modes per hart; machine mode and supervisor mode.
-
-Each interrupt can be enabled on per-context basis. Any context can claim
-a pending enabled interrupt and then release it once it has been handled.
-
-Each interrupt has a configurable priority. Higher priority interrupts are
-serviced first. Each context can specify a priority threshold. Interrupts
-with priority below this threshold will not cause the PLIC to raise its
-interrupt line leading to the context.
-
-While the PLIC supports both edge-triggered and level-triggered interrupts,
-interrupt handlers are oblivious to this distinction and therefore it is not
-specified in the PLIC device-tree binding.
-
-While the RISC-V ISA doesn't specify a memory layout for the PLIC, the
-"sifive,plic-1.0.0" device is a concrete implementation of the PLIC that
-contains a specific memory layout, which is documented in chapter 8 of the
-SiFive U5 Coreplex Series Manual <https://static.dev.sifive.com/U54-MC-RVCoreIP.pdf>.
-
-Required properties:
-- compatible : "sifive,plic-1.0.0" and a string identifying the actual
- detailed implementation in case that specific bugs need to be worked around.
-- #address-cells : should be <0> or more.
-- #interrupt-cells : should be <1> or more.
-- interrupt-controller : Identifies the node as an interrupt controller.
-- reg : Should contain 1 register range (address and length).
-- interrupts-extended : Specifies which contexts are connected to the PLIC,
- with "-1" specifying that a context is not present. Each node pointed
- to should be a riscv,cpu-intc node, which has a riscv node as parent.
-- riscv,ndev: Specifies how many external interrupts are supported by
- this controller.
-
-Example:
-
- plic: interrupt-controller@c000000 {
- #address-cells = <0>;
- #interrupt-cells = <1>;
- compatible = "sifive,plic-1.0.0", "sifive,fu540-c000-plic";
- interrupt-controller;
- interrupts-extended = <
- &cpu0-intc 11
- &cpu1-intc 11 &cpu1-intc 9
- &cpu2-intc 11 &cpu2-intc 9
- &cpu3-intc 11 &cpu3-intc 9
- &cpu4-intc 11 &cpu4-intc 9>;
- reg = <0xc000000 0x4000000>;
- riscv,ndev = <10>;
- };
diff --git a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
new file mode 100644
index 0000000..95c8c85
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
@@ -0,0 +1,107 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+# Copyright (C) 2020 SiFive, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/sifive,plic-1.0.0.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SiFive Platform-Level Interrupt Controller (PLIC)
+
+description:
+ SiFive SOCs include an implementation of the Platform-Level Interrupt Controller
+ (PLIC) high-level specification in the RISC-V Privileged Architecture
+ specification. The PLIC connects all external interrupts in the system to all
+ hart contexts in the system, via the external interrupt source in each hart.
+
+ A hart context is a privilege mode in a hardware execution thread. For example,
+ in an 4 core system with 2-way SMT, you have 8 harts and probably at least two
+ privilege modes per hart; machine mode and supervisor mode.
+
+ Each interrupt can be enabled on per-context basis. Any context can claim
+ a pending enabled interrupt and then release it once it has been handled.
+
+ Each interrupt has a configurable priority. Higher priority interrupts are
+ serviced first. Each context can specify a priority threshold. Interrupts
+ with priority below this threshold will not cause the PLIC to raise its
+ interrupt line leading to the context.
+
+ While the PLIC supports both edge-triggered and level-triggered interrupts,
+ interrupt handlers are oblivious to this distinction and therefore it is not
+ specified in the PLIC device-tree binding.
+
+ While the RISC-V ISA doesn't specify a memory layout for the PLIC, the
+ "sifive,plic-1.0.0" device is a concrete implementation of the PLIC that
+ contains a specific memory layout, which is documented in chapter 8 of the
+ SiFive U5 Coreplex Series Manual <https://static.dev.sifive.com/U54-MC-RVCoreIP.pdf>.
+
+maintainers:
+ - Sagar Kadam <sagar.kadam@sifive.com>
+ - Paul Walmsley <paul.walmsley@sifive.com>
+ - Palmer Dabbelt <palmer@dabbelt.com>
+
+allOf:
+ - $ref: /schemas/interrupt-controller.yaml#
+
+properties:
+ compatible:
+ items:
+ - const: sifive,plic-1.0.0
+ - const: sifive,fu540-c000-plic
+
+ description:
+ Should be "sifive,plic-1.0.0" and a string identifying the actual
+ detailed implementation in case that specific bugs need to be worked around.
+
+ reg:
+ maxItems: 1
+ description: Should contain 1 register range (address and length).
+
+ '#address-cells':
+ const: 0
+ description: Should be <0> or more.
+
+ '#interrupt-cells':
+ const: 1
+ description: Should be <1> or more.
+
+ interrupt-controller: true
+
+ interrupts-extended:
+ minItems: 1
+ description:
+ Specifies which contexts are connected to the PLIC, with "-1" specifying
+ that a context is not present. Each node pointed to should be a
+ riscv,cpu-intc node, which has a riscv node as parent.
+
+ riscv,ndev:
+ $ref: "/schemas/types.yaml#/definitions/uint32"
+ description:
+ Specifies how many external interrupts are supported by this controller.
+
+required:
+ - compatible
+ - '#address-cells'
+ - '#interrupt-cells'
+ - interrupt-controller
+ - reg
+ - interrupts-extended
+ - riscv,ndev
+
+additionalProperties: false
+
+examples:
+ - |
+ plic: interrupt-controller@c000000 {
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ compatible = "sifive,plic-1.0.0", "sifive,fu540-c000-plic";
+ interrupt-controller;
+ interrupts-extended = <
+ &cpu0_intc 11
+ &cpu1_intc 11 &cpu1_intc 9
+ &cpu2_intc 11 &cpu2_intc 9
+ &cpu3_intc 11 &cpu3_intc 9
+ &cpu4_intc 11 &cpu4_intc 9>;
+ reg = <0xc000000 0x4000000>;
+ riscv,ndev = <10>;
+ };
--
2.7.4
^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [PATCH v1 2/3] dt-bindings: riscv: convert plic bindings to json-schema
2020-09-10 10:44 ` [PATCH v1 2/3] dt-bindings: riscv: convert plic " Sagar Kadam
@ 2020-09-22 20:34 ` Rob Herring
2020-09-23 17:33 ` Sagar Kadam
2021-03-22 15:38 ` Geert Uytterhoeven
0 siblings, 2 replies; 12+ messages in thread
From: Rob Herring @ 2020-09-22 20:34 UTC (permalink / raw)
To: Sagar Kadam
Cc: linux-pwm, linux-kernel, linux-riscv, devicetree, linux-clk,
mturquette, sboyd, paul.walmsley, palmer, tglx, jason, maz,
thierry.reding, u.kleine-koenig, lee.jones, aou, yash.shah
On Thu, Sep 10, 2020 at 04:14:03PM +0530, Sagar Kadam wrote:
> Convert device tree bindings for SiFive's PLIC to YAML format
>
> Signed-off-by: Sagar Kadam <sagar.kadam@sifive.com>
> ---
> .../interrupt-controller/sifive,plic-1.0.0.txt | 58 -----------
> .../interrupt-controller/sifive,plic-1.0.0.yaml | 107 +++++++++++++++++++++
> 2 files changed, 107 insertions(+), 58 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.txt
> create mode 100644 Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
>
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.txt b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.txt
> deleted file mode 100644
> index 6adf7a6..0000000
> --- a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.txt
> +++ /dev/null
> @@ -1,58 +0,0 @@
> -SiFive Platform-Level Interrupt Controller (PLIC)
> --------------------------------------------------
> -
> -SiFive SOCs include an implementation of the Platform-Level Interrupt Controller
> -(PLIC) high-level specification in the RISC-V Privileged Architecture
> -specification. The PLIC connects all external interrupts in the system to all
> -hart contexts in the system, via the external interrupt source in each hart.
> -
> -A hart context is a privilege mode in a hardware execution thread. For example,
> -in an 4 core system with 2-way SMT, you have 8 harts and probably at least two
> -privilege modes per hart; machine mode and supervisor mode.
> -
> -Each interrupt can be enabled on per-context basis. Any context can claim
> -a pending enabled interrupt and then release it once it has been handled.
> -
> -Each interrupt has a configurable priority. Higher priority interrupts are
> -serviced first. Each context can specify a priority threshold. Interrupts
> -with priority below this threshold will not cause the PLIC to raise its
> -interrupt line leading to the context.
> -
> -While the PLIC supports both edge-triggered and level-triggered interrupts,
> -interrupt handlers are oblivious to this distinction and therefore it is not
> -specified in the PLIC device-tree binding.
> -
> -While the RISC-V ISA doesn't specify a memory layout for the PLIC, the
> -"sifive,plic-1.0.0" device is a concrete implementation of the PLIC that
> -contains a specific memory layout, which is documented in chapter 8 of the
> -SiFive U5 Coreplex Series Manual <https://static.dev.sifive.com/U54-MC-RVCoreIP.pdf>.
> -
> -Required properties:
> -- compatible : "sifive,plic-1.0.0" and a string identifying the actual
> - detailed implementation in case that specific bugs need to be worked around.
> -- #address-cells : should be <0> or more.
> -- #interrupt-cells : should be <1> or more.
> -- interrupt-controller : Identifies the node as an interrupt controller.
> -- reg : Should contain 1 register range (address and length).
> -- interrupts-extended : Specifies which contexts are connected to the PLIC,
> - with "-1" specifying that a context is not present. Each node pointed
> - to should be a riscv,cpu-intc node, which has a riscv node as parent.
> -- riscv,ndev: Specifies how many external interrupts are supported by
> - this controller.
> -
> -Example:
> -
> - plic: interrupt-controller@c000000 {
> - #address-cells = <0>;
> - #interrupt-cells = <1>;
> - compatible = "sifive,plic-1.0.0", "sifive,fu540-c000-plic";
> - interrupt-controller;
> - interrupts-extended = <
> - &cpu0-intc 11
> - &cpu1-intc 11 &cpu1-intc 9
> - &cpu2-intc 11 &cpu2-intc 9
> - &cpu3-intc 11 &cpu3-intc 9
> - &cpu4-intc 11 &cpu4-intc 9>;
> - reg = <0xc000000 0x4000000>;
> - riscv,ndev = <10>;
> - };
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
> new file mode 100644
> index 0000000..95c8c85
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
> @@ -0,0 +1,107 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +# Copyright (C) 2020 SiFive, Inc.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/interrupt-controller/sifive,plic-1.0.0.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: SiFive Platform-Level Interrupt Controller (PLIC)
> +
> +description:
> + SiFive SOCs include an implementation of the Platform-Level Interrupt Controller
> + (PLIC) high-level specification in the RISC-V Privileged Architecture
> + specification. The PLIC connects all external interrupts in the system to all
> + hart contexts in the system, via the external interrupt source in each hart.
> +
> + A hart context is a privilege mode in a hardware execution thread. For example,
> + in an 4 core system with 2-way SMT, you have 8 harts and probably at least two
> + privilege modes per hart; machine mode and supervisor mode.
> +
> + Each interrupt can be enabled on per-context basis. Any context can claim
> + a pending enabled interrupt and then release it once it has been handled.
> +
> + Each interrupt has a configurable priority. Higher priority interrupts are
> + serviced first. Each context can specify a priority threshold. Interrupts
> + with priority below this threshold will not cause the PLIC to raise its
> + interrupt line leading to the context.
> +
> + While the PLIC supports both edge-triggered and level-triggered interrupts,
> + interrupt handlers are oblivious to this distinction and therefore it is not
> + specified in the PLIC device-tree binding.
> +
> + While the RISC-V ISA doesn't specify a memory layout for the PLIC, the
> + "sifive,plic-1.0.0" device is a concrete implementation of the PLIC that
> + contains a specific memory layout, which is documented in chapter 8 of the
> + SiFive U5 Coreplex Series Manual <https://static.dev.sifive.com/U54-MC-RVCoreIP.pdf>.
> +
> +maintainers:
> + - Sagar Kadam <sagar.kadam@sifive.com>
> + - Paul Walmsley <paul.walmsley@sifive.com>
> + - Palmer Dabbelt <palmer@dabbelt.com>
> +
> +allOf:
> + - $ref: /schemas/interrupt-controller.yaml#
Don't need this. It gets selected matching on node name.
> +
> +properties:
> + compatible:
> + items:
> + - const: sifive,plic-1.0.0
> + - const: sifive,fu540-c000-plic
Somehow these ended up in the wrong order. Should be most specific to
least specific.
> +
> + description:
> + Should be "sifive,plic-1.0.0" and a string identifying the actual
> + detailed implementation in case that specific bugs need to be worked around.
Drop this.
> +
> + reg:
> + maxItems: 1
> + description: Should contain 1 register range (address and length).
Drop this. The schema says this...
> +
> + '#address-cells':
> + const: 0
> + description: Should be <0> or more.
Drop. 'or more' is wrong. If there's a case with more, it will need to
be documented.
> +
> + '#interrupt-cells':
> + const: 1
> + description: Should be <1> or more.
Same here.
> +
> + interrupt-controller: true
> +
> + interrupts-extended:
> + minItems: 1
> + description:
> + Specifies which contexts are connected to the PLIC, with "-1" specifying
> + that a context is not present. Each node pointed to should be a
> + riscv,cpu-intc node, which has a riscv node as parent.
> +
> + riscv,ndev:
> + $ref: "/schemas/types.yaml#/definitions/uint32"
> + description:
> + Specifies how many external interrupts are supported by this controller.
> +
> +required:
> + - compatible
> + - '#address-cells'
> + - '#interrupt-cells'
> + - interrupt-controller
> + - reg
> + - interrupts-extended
> + - riscv,ndev
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + plic: interrupt-controller@c000000 {
> + #address-cells = <0>;
> + #interrupt-cells = <1>;
> + compatible = "sifive,plic-1.0.0", "sifive,fu540-c000-plic";
> + interrupt-controller;
> + interrupts-extended = <
> + &cpu0_intc 11
> + &cpu1_intc 11 &cpu1_intc 9
> + &cpu2_intc 11 &cpu2_intc 9
> + &cpu3_intc 11 &cpu3_intc 9
> + &cpu4_intc 11 &cpu4_intc 9>;
> + reg = <0xc000000 0x4000000>;
> + riscv,ndev = <10>;
> + };
> --
> 2.7.4
>
^ permalink raw reply [flat|nested] 12+ messages in thread* RE: [PATCH v1 2/3] dt-bindings: riscv: convert plic bindings to json-schema
2020-09-22 20:34 ` Rob Herring
@ 2020-09-23 17:33 ` Sagar Kadam
2021-03-22 15:38 ` Geert Uytterhoeven
1 sibling, 0 replies; 12+ messages in thread
From: Sagar Kadam @ 2020-09-23 17:33 UTC (permalink / raw)
To: Rob Herring
Cc: linux-pwm, linux-kernel, linux-riscv, devicetree, linux-clk,
mturquette, sboyd, Paul Walmsley ( Sifive),
palmer, tglx, jason, maz, thierry.reding, u.kleine-koenig,
lee.jones, aou, Yash Shah
Hello Rob,
> -----Original Message-----
> From: Rob Herring <robh@kernel.org>
> Sent: Wednesday, September 23, 2020 2:04 AM
> To: Sagar Kadam <sagar.kadam@openfive.com>
> Cc: linux-pwm@vger.kernel.org; linux-kernel@vger.kernel.org; linux-
> riscv@lists.infradead.org; devicetree@vger.kernel.org; linux-
> clk@vger.kernel.org; mturquette@baylibre.com; sboyd@kernel.org; Paul
> Walmsley ( Sifive) <paul.walmsley@sifive.com>; palmer@dabbelt.com;
> tglx@linutronix.de; jason@lakedaemon.net; maz@kernel.org;
> thierry.reding@gmail.com; u.kleine-koenig@pengutronix.de;
> lee.jones@linaro.org; aou@eecs.berkeley.edu; Yash Shah
> <yash.shah@openfive.com>
> Subject: Re: [PATCH v1 2/3] dt-bindings: riscv: convert plic bindings to json-
> schema
>
> [External Email] Do not click links or attachments unless you recognize the
> sender and know the content is safe
>
> On Thu, Sep 10, 2020 at 04:14:03PM +0530, Sagar Kadam wrote:
> > Convert device tree bindings for SiFive's PLIC to YAML format
> >
> > Signed-off-by: Sagar Kadam <sagar.kadam@sifive.com>
> > ---
> > .../interrupt-controller/sifive,plic-1.0.0.txt | 58 -----------
> > .../interrupt-controller/sifive,plic-1.0.0.yaml | 107
> +++++++++++++++++++++
> > 2 files changed, 107 insertions(+), 58 deletions(-)
> > delete mode 100644 Documentation/devicetree/bindings/interrupt-
> controller/sifive,plic-1.0.0.txt
> > create mode 100644 Documentation/devicetree/bindings/interrupt-
> controller/sifive,plic-1.0.0.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/interrupt-
> controller/sifive,plic-1.0.0.txt
> b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-
> 1.0.0.txt
> > deleted file mode 100644
> > index 6adf7a6..0000000
> > --- a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-
> 1.0.0.txt
> > +++ /dev/null
> > @@ -1,58 +0,0 @@
> > -SiFive Platform-Level Interrupt Controller (PLIC)
> > --------------------------------------------------
> > -
> > -SiFive SOCs include an implementation of the Platform-Level Interrupt
> Controller
> > -(PLIC) high-level specification in the RISC-V Privileged Architecture
> > -specification. The PLIC connects all external interrupts in the system to all
> > -hart contexts in the system, via the external interrupt source in each hart.
> > -
> > -A hart context is a privilege mode in a hardware execution thread. For
> example,
> > -in an 4 core system with 2-way SMT, you have 8 harts and probably at
> least two
> > -privilege modes per hart; machine mode and supervisor mode.
> > -
> > -Each interrupt can be enabled on per-context basis. Any context can claim
> > -a pending enabled interrupt and then release it once it has been handled.
> > -
> > -Each interrupt has a configurable priority. Higher priority interrupts are
> > -serviced first. Each context can specify a priority threshold. Interrupts
> > -with priority below this threshold will not cause the PLIC to raise its
> > -interrupt line leading to the context.
> > -
> > -While the PLIC supports both edge-triggered and level-triggered interrupts,
> > -interrupt handlers are oblivious to this distinction and therefore it is not
> > -specified in the PLIC device-tree binding.
> > -
> > -While the RISC-V ISA doesn't specify a memory layout for the PLIC, the
> > -"sifive,plic-1.0.0" device is a concrete implementation of the PLIC that
> > -contains a specific memory layout, which is documented in chapter 8 of
> the
> > -SiFive U5 Coreplex Series Manual <https://static.dev.sifive.com/U54-MC-
> RVCoreIP.pdf>.
> > -
> > -Required properties:
> > -- compatible : "sifive,plic-1.0.0" and a string identifying the actual
> > - detailed implementation in case that specific bugs need to be worked
> around.
> > -- #address-cells : should be <0> or more.
> > -- #interrupt-cells : should be <1> or more.
> > -- interrupt-controller : Identifies the node as an interrupt controller.
> > -- reg : Should contain 1 register range (address and length).
> > -- interrupts-extended : Specifies which contexts are connected to the PLIC,
> > - with "-1" specifying that a context is not present. Each node pointed
> > - to should be a riscv,cpu-intc node, which has a riscv node as parent.
> > -- riscv,ndev: Specifies how many external interrupts are supported by
> > - this controller.
> > -
> > -Example:
> > -
> > - plic: interrupt-controller@c000000 {
> > - #address-cells = <0>;
> > - #interrupt-cells = <1>;
> > - compatible = "sifive,plic-1.0.0", "sifive,fu540-c000-plic";
> > - interrupt-controller;
> > - interrupts-extended = <
> > - &cpu0-intc 11
> > - &cpu1-intc 11 &cpu1-intc 9
> > - &cpu2-intc 11 &cpu2-intc 9
> > - &cpu3-intc 11 &cpu3-intc 9
> > - &cpu4-intc 11 &cpu4-intc 9>;
> > - reg = <0xc000000 0x4000000>;
> > - riscv,ndev = <10>;
> > - };
> > diff --git a/Documentation/devicetree/bindings/interrupt-
> controller/sifive,plic-1.0.0.yaml
> b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-
> 1.0.0.yaml
> > new file mode 100644
> > index 0000000..95c8c85
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-
> 1.0.0.yaml
> > @@ -0,0 +1,107 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > +# Copyright (C) 2020 SiFive, Inc.
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/interrupt-controller/sifive,plic-
> 1.0.0.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: SiFive Platform-Level Interrupt Controller (PLIC)
> > +
> > +description:
> > + SiFive SOCs include an implementation of the Platform-Level Interrupt
> Controller
> > + (PLIC) high-level specification in the RISC-V Privileged Architecture
> > + specification. The PLIC connects all external interrupts in the system to all
> > + hart contexts in the system, via the external interrupt source in each
> hart.
> > +
> > + A hart context is a privilege mode in a hardware execution thread. For
> example,
> > + in an 4 core system with 2-way SMT, you have 8 harts and probably at
> least two
> > + privilege modes per hart; machine mode and supervisor mode.
> > +
> > + Each interrupt can be enabled on per-context basis. Any context can
> claim
> > + a pending enabled interrupt and then release it once it has been
> handled.
> > +
> > + Each interrupt has a configurable priority. Higher priority interrupts are
> > + serviced first. Each context can specify a priority threshold. Interrupts
> > + with priority below this threshold will not cause the PLIC to raise its
> > + interrupt line leading to the context.
> > +
> > + While the PLIC supports both edge-triggered and level-triggered
> interrupts,
> > + interrupt handlers are oblivious to this distinction and therefore it is not
> > + specified in the PLIC device-tree binding.
> > +
> > + While the RISC-V ISA doesn't specify a memory layout for the PLIC, the
> > + "sifive,plic-1.0.0" device is a concrete implementation of the PLIC that
> > + contains a specific memory layout, which is documented in chapter 8 of
> the
> > + SiFive U5 Coreplex Series Manual <https://static.dev.sifive.com/U54-MC-
> RVCoreIP.pdf>.
> > +
> > +maintainers:
> > + - Sagar Kadam <sagar.kadam@sifive.com>
> > + - Paul Walmsley <paul.walmsley@sifive.com>
> > + - Palmer Dabbelt <palmer@dabbelt.com>
> > +
> > +allOf:
> > + - $ref: /schemas/interrupt-controller.yaml#
>
> Don't need this. It gets selected matching on node name.
>
Thanks for your suggestions. I will incorporate your suggestions and send the v2.
> > +
> > +properties:
> > + compatible:
> > + items:
> > + - const: sifive,plic-1.0.0
> > + - const: sifive,fu540-c000-plic
>
> Somehow these ended up in the wrong order. Should be most specific to
> least specific.
>
Yes, will rectify this.
> > +
> > + description:
> > + Should be "sifive,plic-1.0.0" and a string identifying the actual
> > + detailed implementation in case that specific bugs need to be worked
> around.
>
> Drop this.
>
> > +
> > + reg:
> > + maxItems: 1
> > + description: Should contain 1 register range (address and length).
>
> Drop this. The schema says this...
>
> > +
> > + '#address-cells':
> > + const: 0
> > + description: Should be <0> or more.
>
> Drop. 'or more' is wrong. If there's a case with more, it will need to
> be documented.
>
> > +
> > + '#interrupt-cells':
> > + const: 1
> > + description: Should be <1> or more.
>
> Same here.
>
Okay.
Will remove as suggested above
Thanks & BR,
Sagar
> > +
> > + interrupt-controller: true
> > +
> > + interrupts-extended:
> > + minItems: 1
> > + description:
> > + Specifies which contexts are connected to the PLIC, with "-1" specifying
> > + that a context is not present. Each node pointed to should be a
> > + riscv,cpu-intc node, which has a riscv node as parent.
> > +
> > + riscv,ndev:
> > + $ref: "/schemas/types.yaml#/definitions/uint32"
> > + description:
> > + Specifies how many external interrupts are supported by this
> controller.
> > +
> > +required:
> > + - compatible
> > + - '#address-cells'
> > + - '#interrupt-cells'
> > + - interrupt-controller
> > + - reg
> > + - interrupts-extended
> > + - riscv,ndev
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + plic: interrupt-controller@c000000 {
> > + #address-cells = <0>;
> > + #interrupt-cells = <1>;
> > + compatible = "sifive,plic-1.0.0", "sifive,fu540-c000-plic";
> > + interrupt-controller;
> > + interrupts-extended = <
> > + &cpu0_intc 11
> > + &cpu1_intc 11 &cpu1_intc 9
> > + &cpu2_intc 11 &cpu2_intc 9
> > + &cpu3_intc 11 &cpu3_intc 9
> > + &cpu4_intc 11 &cpu4_intc 9>;
> > + reg = <0xc000000 0x4000000>;
> > + riscv,ndev = <10>;
> > + };
> > --
> > 2.7.4
> >
^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [PATCH v1 2/3] dt-bindings: riscv: convert plic bindings to json-schema
2020-09-22 20:34 ` Rob Herring
2020-09-23 17:33 ` Sagar Kadam
@ 2021-03-22 15:38 ` Geert Uytterhoeven
2021-03-22 17:36 ` Rob Herring
1 sibling, 1 reply; 12+ messages in thread
From: Geert Uytterhoeven @ 2021-03-22 15:38 UTC (permalink / raw)
To: Sagar Kadam, Rob Herring
Cc: Linux PWM List, Linux Kernel Mailing List, linux-riscv,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS,
linux-clk, Michael Turquette, Stephen Boyd, Paul Walmsley,
Palmer Dabbelt, Thomas Gleixner, Jason Cooper, Marc Zyngier,
Thierry Reding, Uwe Kleine-König, Lee Jones, Albert Ou,
Yash Shah
Hi Sagar, Rob,
(replying to an old email, as this one seems to be the most appropriate)
On Tue, Sep 22, 2020 at 10:34 PM Rob Herring <robh@kernel.org> wrote:
> On Thu, Sep 10, 2020 at 04:14:03PM +0530, Sagar Kadam wrote:
> > Convert device tree bindings for SiFive's PLIC to YAML format
> >
> > Signed-off-by: Sagar Kadam <sagar.kadam@sifive.com>
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
> > +
> > + '#address-cells':
> > + const: 0
> > + description: Should be <0> or more.
>
> Drop. 'or more' is wrong. If there's a case with more, it will need to
> be documented.
Why do we have the "'#address-cells': const: 0" at all...
> > +required:
> > + - compatible
> > + - '#address-cells'
... and why is it required?
> > + - '#interrupt-cells'
> > + - interrupt-controller
> > + - reg
> > + - interrupts-extended
> > + - riscv,ndev
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + plic: interrupt-controller@c000000 {
> > + #address-cells = <0>;
> > + #interrupt-cells = <1>;
> > + compatible = "sifive,plic-1.0.0", "sifive,fu540-c000-plic";
> > + interrupt-controller;
> > + interrupts-extended = <
> > + &cpu0_intc 11
> > + &cpu1_intc 11 &cpu1_intc 9
> > + &cpu2_intc 11 &cpu2_intc 9
> > + &cpu3_intc 11 &cpu3_intc 9
> > + &cpu4_intc 11 &cpu4_intc 9>;
> > + reg = <0xc000000 0x4000000>;
> > + riscv,ndev = <10>;
> > + };
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [PATCH v1 2/3] dt-bindings: riscv: convert plic bindings to json-schema
2021-03-22 15:38 ` Geert Uytterhoeven
@ 2021-03-22 17:36 ` Rob Herring
0 siblings, 0 replies; 12+ messages in thread
From: Rob Herring @ 2021-03-22 17:36 UTC (permalink / raw)
To: Geert Uytterhoeven
Cc: Sagar Kadam, Linux PWM List, Linux Kernel Mailing List,
linux-riscv,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS,
linux-clk, Michael Turquette, Stephen Boyd, Paul Walmsley,
Palmer Dabbelt, Thomas Gleixner, Jason Cooper, Marc Zyngier,
Thierry Reding, Uwe Kleine-König, Lee Jones, Albert Ou,
Yash Shah
On Mon, Mar 22, 2021 at 9:38 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>
> Hi Sagar, Rob,
>
> (replying to an old email, as this one seems to be the most appropriate)
>
> On Tue, Sep 22, 2020 at 10:34 PM Rob Herring <robh@kernel.org> wrote:
> > On Thu, Sep 10, 2020 at 04:14:03PM +0530, Sagar Kadam wrote:
> > > Convert device tree bindings for SiFive's PLIC to YAML format
> > >
> > > Signed-off-by: Sagar Kadam <sagar.kadam@sifive.com>
>
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
>
> > > +
> > > + '#address-cells':
> > > + const: 0
> > > + description: Should be <0> or more.
> >
> > Drop. 'or more' is wrong. If there's a case with more, it will need to
> > be documented.
>
> Why do we have the "'#address-cells': const: 0" at all...
>
> > > +required:
> > > + - compatible
> > > + - '#address-cells'
>
> ... and why is it required?
It is only required if an 'interrupt-map' points to this node.
Currently dtc is warning if it is missing always, but there are plans
to relax dtc to only warn when 'interrupt-map' is present. Of course,
if you had 'interrupt-map' in an overlay, you'd want #address-cells in
the base dt and there's no other way to check that than making it
required.
Rob
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH v1 3/3] dt-bindings: riscv: convert pwm bindings to json-schema
2020-09-10 10:44 [PATCH v1 0/3] convert sifive's prci, plic and pwm bindings to yaml Sagar Kadam
2020-09-10 10:44 ` [PATCH v1 1/3] dt-bindings: fu540: prci: convert PRCI bindings to json-schema Sagar Kadam
2020-09-10 10:44 ` [PATCH v1 2/3] dt-bindings: riscv: convert plic " Sagar Kadam
@ 2020-09-10 10:44 ` Sagar Kadam
2020-09-22 20:37 ` Rob Herring
2 siblings, 1 reply; 12+ messages in thread
From: Sagar Kadam @ 2020-09-10 10:44 UTC (permalink / raw)
To: linux-pwm, linux-kernel, linux-riscv, devicetree, linux-clk
Cc: mturquette, sboyd, robh+dt, paul.walmsley, palmer, tglx, jason,
maz, thierry.reding, u.kleine-koenig, lee.jones, aou, yash.shah,
Sagar Kadam
Convert device tree bindings for SiFive's PWM controller to YAML
format.
Signed-off-by: Sagar Kadam <sagar.kadam@sifive.com>
---
.../devicetree/bindings/pwm/pwm-sifive.txt | 33 ----------
.../devicetree/bindings/pwm/pwm-sifive.yaml | 72 ++++++++++++++++++++++
2 files changed, 72 insertions(+), 33 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/pwm/pwm-sifive.txt
create mode 100644 Documentation/devicetree/bindings/pwm/pwm-sifive.yaml
diff --git a/Documentation/devicetree/bindings/pwm/pwm-sifive.txt b/Documentation/devicetree/bindings/pwm/pwm-sifive.txt
deleted file mode 100644
index 3d1dd7b0..0000000
--- a/Documentation/devicetree/bindings/pwm/pwm-sifive.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-SiFive PWM controller
-
-Unlike most other PWM controllers, the SiFive PWM controller currently only
-supports one period for all channels in the PWM. All PWMs need to run at
-the same period. The period also has significant restrictions on the values
-it can achieve, which the driver rounds to the nearest achievable period.
-PWM RTL that corresponds to the IP block version numbers can be found
-here:
-
-https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/pwm
-
-Required properties:
-- compatible: Should be "sifive,<chip>-pwm" and "sifive,pwm<version>".
- Supported compatible strings are: "sifive,fu540-c000-pwm" for the SiFive
- PWM v0 as integrated onto the SiFive FU540 chip, and "sifive,pwm0" for the
- SiFive PWM v0 IP block with no chip integration tweaks.
- Please refer to sifive-blocks-ip-versioning.txt for details.
-- reg: physical base address and length of the controller's registers
-- clocks: Should contain a clock identifier for the PWM's parent clock.
-- #pwm-cells: Should be 3. See pwm.yaml in this directory
- for a description of the cell format.
-- interrupts: one interrupt per PWM channel
-
-Examples:
-
-pwm: pwm@10020000 {
- compatible = "sifive,fu540-c000-pwm", "sifive,pwm0";
- reg = <0x0 0x10020000 0x0 0x1000>;
- clocks = <&tlclk>;
- interrupt-parent = <&plic>;
- interrupts = <42 43 44 45>;
- #pwm-cells = <3>;
-};
diff --git a/Documentation/devicetree/bindings/pwm/pwm-sifive.yaml b/Documentation/devicetree/bindings/pwm/pwm-sifive.yaml
new file mode 100644
index 0000000..415d053
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pwm-sifive.yaml
@@ -0,0 +1,72 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2020 SiFive, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/pwm-sifive.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SiFive PWM controller
+
+maintainers:
+ - Yash Shah <yash.shah@sifive.com>
+ - Sagar Kadam <sagar.kadam@sifive.com>
+ - Paul Walmsley <paul.walmsley@sifive.com>
+
+description:
+ Unlike most other PWM controllers, the SiFive PWM controller currently
+ only supports one period for all channels in the PWM. All PWMs need to
+ run at the same period. The period also has significant restrictions on
+ the values it can achieve, which the driver rounds to the nearest
+ achievable period. PWM RTL that corresponds to the IP block version
+ numbers can be found here -
+
+ https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/pwm
+
+properties:
+ compatible:
+ items:
+ - const: sifive,fu540-c000-pwm
+ - const: sifive,pwm0
+ description:
+ Should be "sifive,<chip>-pwm" and "sifive,pwm<version>". Supported
+ compatible strings are "sifive,fu540-c000-pwm" for the SiFive PWM v0
+ as integrated onto the SiFive FU540 chip, and "sifive,pwm0" for the
+ SiFive PWM v0 IP block with no chip integration tweaks.
+ Please refer to sifive-blocks-ip-versioning.txt for details.
+
+ reg:
+ maxItems: 1
+ description: Physical base address and length of the controller's registers
+
+ clocks:
+ description: Should contain a clock identifier for the PWM's parent clock.
+
+ "#pwm-cells":
+ const: 3
+ description:
+ Should be 3. See pwm.yaml in this directory for a description of the
+ cell format.
+
+ interrupts:
+ maxItems: 1
+ description: One interrupt per PWM channel.
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - "#pwm-cells"
+ - interrupts
+
+additionalProperties: false
+
+examples:
+ - |
+ pwm: pwm@10020000 {
+ compatible = "sifive,fu540-c000-pwm", "sifive,pwm0";
+ reg = <0x10020000 0x1000>;
+ clocks = <&tlclk>;
+ interrupt-parent = <&plic>;
+ interrupts = <42 43 44 45>;
+ #pwm-cells = <3>;
+ };
--
2.7.4
^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [PATCH v1 3/3] dt-bindings: riscv: convert pwm bindings to json-schema
2020-09-10 10:44 ` [PATCH v1 3/3] dt-bindings: riscv: convert pwm " Sagar Kadam
@ 2020-09-22 20:37 ` Rob Herring
2020-09-26 4:51 ` Sagar Kadam
0 siblings, 1 reply; 12+ messages in thread
From: Rob Herring @ 2020-09-22 20:37 UTC (permalink / raw)
To: Sagar Kadam
Cc: linux-pwm, linux-kernel, linux-riscv, devicetree, linux-clk,
mturquette, sboyd, paul.walmsley, palmer, tglx, jason, maz,
thierry.reding, u.kleine-koenig, lee.jones, aou, yash.shah
On Thu, Sep 10, 2020 at 04:14:04PM +0530, Sagar Kadam wrote:
> Convert device tree bindings for SiFive's PWM controller to YAML
> format.
>
> Signed-off-by: Sagar Kadam <sagar.kadam@sifive.com>
> ---
> .../devicetree/bindings/pwm/pwm-sifive.txt | 33 ----------
> .../devicetree/bindings/pwm/pwm-sifive.yaml | 72 ++++++++++++++++++++++
> 2 files changed, 72 insertions(+), 33 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/pwm/pwm-sifive.txt
> create mode 100644 Documentation/devicetree/bindings/pwm/pwm-sifive.yaml
>
> diff --git a/Documentation/devicetree/bindings/pwm/pwm-sifive.txt b/Documentation/devicetree/bindings/pwm/pwm-sifive.txt
> deleted file mode 100644
> index 3d1dd7b0..0000000
> --- a/Documentation/devicetree/bindings/pwm/pwm-sifive.txt
> +++ /dev/null
> @@ -1,33 +0,0 @@
> -SiFive PWM controller
> -
> -Unlike most other PWM controllers, the SiFive PWM controller currently only
> -supports one period for all channels in the PWM. All PWMs need to run at
> -the same period. The period also has significant restrictions on the values
> -it can achieve, which the driver rounds to the nearest achievable period.
> -PWM RTL that corresponds to the IP block version numbers can be found
> -here:
> -
> -https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/pwm
> -
> -Required properties:
> -- compatible: Should be "sifive,<chip>-pwm" and "sifive,pwm<version>".
> - Supported compatible strings are: "sifive,fu540-c000-pwm" for the SiFive
> - PWM v0 as integrated onto the SiFive FU540 chip, and "sifive,pwm0" for the
> - SiFive PWM v0 IP block with no chip integration tweaks.
> - Please refer to sifive-blocks-ip-versioning.txt for details.
> -- reg: physical base address and length of the controller's registers
> -- clocks: Should contain a clock identifier for the PWM's parent clock.
> -- #pwm-cells: Should be 3. See pwm.yaml in this directory
> - for a description of the cell format.
> -- interrupts: one interrupt per PWM channel
> -
> -Examples:
> -
> -pwm: pwm@10020000 {
> - compatible = "sifive,fu540-c000-pwm", "sifive,pwm0";
> - reg = <0x0 0x10020000 0x0 0x1000>;
> - clocks = <&tlclk>;
> - interrupt-parent = <&plic>;
> - interrupts = <42 43 44 45>;
> - #pwm-cells = <3>;
> -};
> diff --git a/Documentation/devicetree/bindings/pwm/pwm-sifive.yaml b/Documentation/devicetree/bindings/pwm/pwm-sifive.yaml
> new file mode 100644
> index 0000000..415d053
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/pwm-sifive.yaml
> @@ -0,0 +1,72 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2020 SiFive, Inc.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pwm/pwm-sifive.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: SiFive PWM controller
> +
> +maintainers:
> + - Yash Shah <yash.shah@sifive.com>
> + - Sagar Kadam <sagar.kadam@sifive.com>
> + - Paul Walmsley <paul.walmsley@sifive.com>
> +
> +description:
> + Unlike most other PWM controllers, the SiFive PWM controller currently
> + only supports one period for all channels in the PWM. All PWMs need to
> + run at the same period. The period also has significant restrictions on
> + the values it can achieve, which the driver rounds to the nearest
> + achievable period. PWM RTL that corresponds to the IP block version
> + numbers can be found here -
> +
> + https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/pwm
> +
> +properties:
> + compatible:
> + items:
> + - const: sifive,fu540-c000-pwm
> + - const: sifive,pwm0
> + description:
> + Should be "sifive,<chip>-pwm" and "sifive,pwm<version>". Supported
> + compatible strings are "sifive,fu540-c000-pwm" for the SiFive PWM v0
> + as integrated onto the SiFive FU540 chip, and "sifive,pwm0" for the
> + SiFive PWM v0 IP block with no chip integration tweaks.
> + Please refer to sifive-blocks-ip-versioning.txt for details.
> +
> + reg:
> + maxItems: 1
> + description: Physical base address and length of the controller's registers
Drop description.
> +
> + clocks:
> + description: Should contain a clock identifier for the PWM's parent clock.
How many clocks?
> +
> + "#pwm-cells":
> + const: 3
> + description:
> + Should be 3. See pwm.yaml in this directory for a description of the
> + cell format.
Drop.
> +
> + interrupts:
> + maxItems: 1
Is it 1 or...
> + description: One interrupt per PWM channel.
one per channel?
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - "#pwm-cells"
> + - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + pwm: pwm@10020000 {
> + compatible = "sifive,fu540-c000-pwm", "sifive,pwm0";
> + reg = <0x10020000 0x1000>;
> + clocks = <&tlclk>;
> + interrupt-parent = <&plic>;
> + interrupts = <42 43 44 45>;
Split entries:
interrupts = <42>, <43>, <44>, <45>;
> + #pwm-cells = <3>;
> + };
> --
> 2.7.4
>
^ permalink raw reply [flat|nested] 12+ messages in thread* RE: [PATCH v1 3/3] dt-bindings: riscv: convert pwm bindings to json-schema
2020-09-22 20:37 ` Rob Herring
@ 2020-09-26 4:51 ` Sagar Kadam
0 siblings, 0 replies; 12+ messages in thread
From: Sagar Kadam @ 2020-09-26 4:51 UTC (permalink / raw)
To: Rob Herring
Cc: linux-pwm, linux-kernel, linux-riscv, devicetree, linux-clk,
mturquette, sboyd, Paul Walmsley ( Sifive),
palmer, tglx, jason, maz, thierry.reding, u.kleine-koenig,
lee.jones, aou, Yash Shah
Hello Rob,
> -----Original Message-----
> From: Rob Herring <robh@kernel.org>
> Sent: Wednesday, September 23, 2020 2:07 AM
> To: Sagar Kadam <sagar.kadam@openfive.com>
> Cc: linux-pwm@vger.kernel.org; linux-kernel@vger.kernel.org; linux-
> riscv@lists.infradead.org; devicetree@vger.kernel.org; linux-
> clk@vger.kernel.org; mturquette@baylibre.com; sboyd@kernel.org; Paul
> Walmsley ( Sifive) <paul.walmsley@sifive.com>; palmer@dabbelt.com;
> tglx@linutronix.de; jason@lakedaemon.net; maz@kernel.org;
> thierry.reding@gmail.com; u.kleine-koenig@pengutronix.de;
> lee.jones@linaro.org; aou@eecs.berkeley.edu; Yash Shah
> <yash.shah@openfive.com>
> Subject: Re: [PATCH v1 3/3] dt-bindings: riscv: convert pwm bindings to json-
> schema
>
> [External Email] Do not click links or attachments unless you recognize the
> sender and know the content is safe
>
> On Thu, Sep 10, 2020 at 04:14:04PM +0530, Sagar Kadam wrote:
> > Convert device tree bindings for SiFive's PWM controller to YAML
> > format.
> >
> > Signed-off-by: Sagar Kadam <sagar.kadam@sifive.com>
> > ---
> > .../devicetree/bindings/pwm/pwm-sifive.txt | 33 ----------
> > .../devicetree/bindings/pwm/pwm-sifive.yaml | 72
> ++++++++++++++++++++++
> > 2 files changed, 72 insertions(+), 33 deletions(-) delete mode
> > 100644 Documentation/devicetree/bindings/pwm/pwm-sifive.txt
> > create mode 100644
> > Documentation/devicetree/bindings/pwm/pwm-sifive.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/pwm/pwm-sifive.txt
> > b/Documentation/devicetree/bindings/pwm/pwm-sifive.txt
> > deleted file mode 100644
> > index 3d1dd7b0..0000000
> > --- a/Documentation/devicetree/bindings/pwm/pwm-sifive.txt
> > +++ /dev/null
> > @@ -1,33 +0,0 @@
> > -SiFive PWM controller
> > -
> > -Unlike most other PWM controllers, the SiFive PWM controller
> > currently only -supports one period for all channels in the PWM. All
> > PWMs need to run at -the same period. The period also has significant
> > restrictions on the values -it can achieve, which the driver rounds to the
> nearest achievable period.
> > -PWM RTL that corresponds to the IP block version numbers can be found
> > -here:
> > -
> > -https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/de
> > vices/pwm
> > -
> > -Required properties:
> > -- compatible: Should be "sifive,<chip>-pwm" and "sifive,pwm<version>".
> > - Supported compatible strings are: "sifive,fu540-c000-pwm" for the
> > SiFive
> > - PWM v0 as integrated onto the SiFive FU540 chip, and "sifive,pwm0"
> > for the
> > - SiFive PWM v0 IP block with no chip integration tweaks.
> > - Please refer to sifive-blocks-ip-versioning.txt for details.
> > -- reg: physical base address and length of the controller's registers
> > -- clocks: Should contain a clock identifier for the PWM's parent clock.
> > -- #pwm-cells: Should be 3. See pwm.yaml in this directory
> > - for a description of the cell format.
> > -- interrupts: one interrupt per PWM channel
> > -
> > -Examples:
> > -
> > -pwm: pwm@10020000 {
> > - compatible = "sifive,fu540-c000-pwm", "sifive,pwm0";
> > - reg = <0x0 0x10020000 0x0 0x1000>;
> > - clocks = <&tlclk>;
> > - interrupt-parent = <&plic>;
> > - interrupts = <42 43 44 45>;
> > - #pwm-cells = <3>;
> > -};
> > diff --git a/Documentation/devicetree/bindings/pwm/pwm-sifive.yaml
> > b/Documentation/devicetree/bindings/pwm/pwm-sifive.yaml
> > new file mode 100644
> > index 0000000..415d053
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pwm/pwm-sifive.yaml
> > @@ -0,0 +1,72 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) # Copyright
> > +(C) 2020 SiFive, Inc.
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/pwm/pwm-sifive.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: SiFive PWM controller
> > +
> > +maintainers:
> > + - Yash Shah <yash.shah@sifive.com>
> > + - Sagar Kadam <sagar.kadam@sifive.com>
> > + - Paul Walmsley <paul.walmsley@sifive.com>
> > +
> > +description:
> > + Unlike most other PWM controllers, the SiFive PWM controller
> > +currently
> > + only supports one period for all channels in the PWM. All PWMs need
> > +to
> > + run at the same period. The period also has significant
> > +restrictions on
> > + the values it can achieve, which the driver rounds to the nearest
> > + achievable period. PWM RTL that corresponds to the IP block version
> > + numbers can be found here -
> > +
> > +
> > + https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/d
> > + evices/pwm
> > +
> > +properties:
> > + compatible:
> > + items:
> > + - const: sifive,fu540-c000-pwm
> > + - const: sifive,pwm0
> > + description:
> > + Should be "sifive,<chip>-pwm" and "sifive,pwm<version>". Supported
> > + compatible strings are "sifive,fu540-c000-pwm" for the SiFive PWM v0
> > + as integrated onto the SiFive FU540 chip, and "sifive,pwm0" for the
> > + SiFive PWM v0 IP block with no chip integration tweaks.
> > + Please refer to sifive-blocks-ip-versioning.txt for details.
> > +
> > + reg:
> > + maxItems: 1
> > + description: Physical base address and length of the controller's
> > + registers
>
> Drop description.
Okay.
>
> > +
> > + clocks:
> > + description: Should contain a clock identifier for the PWM's parent
> clock.
>
> How many clocks?
>
PWM IP block instance is clocked with single clock (tlclk).
> > +
> > + "#pwm-cells":
> > + const: 3
> > + description:
> > + Should be 3. See pwm.yaml in this directory for a description of the
> > + cell format.
>
> Drop.
Okay, I will drop this description.
>
> > +
> > + interrupts:
> > + maxItems: 1
>
> Is it 1 or...
>
> > + description: One interrupt per PWM channel.
>
> one per channel?
>
Each PWM instance in FU540-C000 has 4 independent comparator's
each capable of generating interrupts. So maxItems need to be 4 and I can
include it in description something like:
" description:
Each PWM instance in FU540-C000 has 4 comparators. One interrupt per comparator"
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - clocks
> > + - "#pwm-cells"
> > + - interrupts
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + pwm: pwm@10020000 {
> > + compatible = "sifive,fu540-c000-pwm", "sifive,pwm0";
> > + reg = <0x10020000 0x1000>;
> > + clocks = <&tlclk>;
> > + interrupt-parent = <&plic>;
> > + interrupts = <42 43 44 45>;
>
> Split entries:
>
> interrupts = <42>, <43>, <44>, <45>;
>
Yes, I will split entries as suggested.
Thanks & BR,
Sagar
> > + #pwm-cells = <3>;
> > + };
> > --
> > 2.7.4
> >
^ permalink raw reply [flat|nested] 12+ messages in thread