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Message-ID: <20200203150353.23903-3-benjamin.gaignard@st.com>
Date: Mon, 3 Feb 2020 16:03:53 +0100
From: Benjamin Gaignard <benjamin.gaignard@...com>
To: <wg@...ndegger.com>, <mkl@...gutronix.de>, <davem@...emloft.net>,
<robh+dt@...nel.org>, <mark.rutland@....com>,
<sriram.dash@...sung.com>
CC: <linux-can@...r.kernel.org>, <netdev@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Benjamin Gaignard <benjamin.gaignard@...com>
Subject: [PATCH v2 2/2] dt-bindings: net: can: Convert M_CAN to json-schema
Convert M_CAN bindings to json-schema
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...com>
---
version 2:
- use can-transceiver.yaml instead of coding the property in this file
- change the name of yaml file to bosch,m_can.yaml
- use uint32-array for bosch,mram-cfg property
.../devicetree/bindings/net/can/bosch,m_can.yaml | 146 +++++++++++++++++++++
.../devicetree/bindings/net/can/m_can.txt | 75 -----------
2 files changed, 146 insertions(+), 75 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
delete mode 100644 Documentation/devicetree/bindings/net/can/m_can.txt
diff --git a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
new file mode 100644
index 000000000000..f3e760714d3a
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
@@ -0,0 +1,146 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/can/bosch,m_can.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bosch MCAN controller Bindings
+
+description: Bosch MCAN controller for CAN bus
+
+maintainers:
+ - Sriram Dash <sriram.dash@...sung.com>
+
+allOf:
+ - $ref: can-transceiver.yaml
+
+properties:
+ compatible:
+ const: bosch,m_can
+
+ reg:
+ items:
+ - description: M_CAN registers map
+ - description: message RAM
+
+ reg-names:
+ items:
+ - const: m_can
+ - const: message_ram
+
+ interrupts:
+ items:
+ - description: interrupt line0
+ - description: interrupt line1
+ minItems: 1
+ maxItems: 2
+
+ interrupt-names:
+ items:
+ - const: int0
+ - const: int1
+ minItems: 1
+ maxItems: 2
+
+ clocks:
+ items:
+ - description: peripheral clock
+ - description: bus clock
+
+ clock-names:
+ items:
+ - const: hclk
+ - const: cclk
+
+ bosch,mram-cfg:
+ description: |
+ Message RAM configuration data.
+ Multiple M_CAN instances can share the same Message RAM
+ and each element(e.g Rx FIFO or Tx Buffer and etc) number
+ in Message RAM is also configurable, so this property is
+ telling driver how the shared or private Message RAM are
+ used by this M_CAN controller.
+
+ The format should be as follows:
+ <offset sidf_elems xidf_elems rxf0_elems rxf1_elems rxb_elems txe_elems txb_elems>
+ The 'offset' is an address offset of the Message RAM where
+ the following elements start from. This is usually set to
+ 0x0 if you're using a private Message RAM. The remain cells
+ are used to specify how many elements are used for each FIFO/Buffer.
+
+ M_CAN includes the following elements according to user manual:
+ 11-bit Filter 0-128 elements / 0-128 words
+ 29-bit Filter 0-64 elements / 0-128 words
+ Rx FIFO 0 0-64 elements / 0-1152 words
+ Rx FIFO 1 0-64 elements / 0-1152 words
+ Rx Buffers 0-64 elements / 0-1152 words
+ Tx Event FIFO 0-32 elements / 0-64 words
+ Tx Buffers 0-32 elements / 0-576 words
+
+ Please refer to 2.4.1 Message RAM Configuration in Bosch
+ M_CAN user manual for details.
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/int32-array
+ - items:
+ items:
+ - description: The 'offset' is an address offset of the Message RAM
+ where the following elements start from. This is usually
+ set to 0x0 if you're using a private Message RAM.
+ default: 0
+ - description: 11-bit Filter 0-128 elements / 0-128 words
+ minimum: 0
+ maximum: 128
+ - description: 29-bit Filter 0-64 elements / 0-128 words
+ minimum: 0
+ maximum: 64
+ - description: Rx FIFO 0 0-64 elements / 0-1152 words
+ minimum: 0
+ maximum: 64
+ - description: Rx FIFO 1 0-64 elements / 0-1152 words
+ minimum: 0
+ maximum: 64
+ - description: Rx Buffers 0-64 elements / 0-1152 words
+ minimum: 0
+ maximum: 64
+ - description: Tx Event FIFO 0-32 elements / 0-64 words
+ minimum: 0
+ maximum: 32
+ - description: Tx Buffers 0-32 elements / 0-576 words
+ minimum: 0
+ maximum: 32
+ maxItems: 1
+
+ can-transceiver: true
+
+required:
+ - compatible
+ - reg
+ - reg-names
+ - interrupts
+ - interrupt-names
+ - clocks
+ - clock-names
+ - bosch,mram-cfg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/imx6sx-clock.h>
+ can@...8000 {
+ compatible = "bosch,m_can";
+ reg = <0x020e8000 0x4000>, <0x02298000 0x4000>;
+ reg-names = "m_can", "message_ram";
+ interrupts = <0 114 0x04>, <0 114 0x04>;
+ interrupt-names = "int0", "int1";
+ clocks = <&clks IMX6SX_CLK_CANFD>,
+ <&clks IMX6SX_CLK_CANFD>;
+ clock-names = "hclk", "cclk";
+ bosch,mram-cfg = <0x0 0 0 32 0 0 0 1>;
+
+ can-transceiver {
+ max-bitrate = <5000000>;
+ };
+ };
+
+...
diff --git a/Documentation/devicetree/bindings/net/can/m_can.txt b/Documentation/devicetree/bindings/net/can/m_can.txt
deleted file mode 100644
index ed614383af9c..000000000000
--- a/Documentation/devicetree/bindings/net/can/m_can.txt
+++ /dev/null
@@ -1,75 +0,0 @@
-Bosch MCAN controller Device Tree Bindings
--------------------------------------------------
-
-Required properties:
-- compatible : Should be "bosch,m_can" for M_CAN controllers
-- reg : physical base address and size of the M_CAN
- registers map and Message RAM
-- reg-names : Should be "m_can" and "message_ram"
-- interrupts : Should be the interrupt number of M_CAN interrupt
- line 0 and line 1, could be same if sharing
- the same interrupt.
-- interrupt-names : Should contain "int0" and "int1"
-- clocks : Clocks used by controller, should be host clock
- and CAN clock.
-- clock-names : Should contain "hclk" and "cclk"
-- pinctrl-<n> : Pinctrl states as described in bindings/pinctrl/pinctrl-bindings.txt
-- pinctrl-names : Names corresponding to the numbered pinctrl states
-- bosch,mram-cfg : Message RAM configuration data.
- Multiple M_CAN instances can share the same Message
- RAM and each element(e.g Rx FIFO or Tx Buffer and etc)
- number in Message RAM is also configurable,
- so this property is telling driver how the shared or
- private Message RAM are used by this M_CAN controller.
-
- The format should be as follows:
- <offset sidf_elems xidf_elems rxf0_elems rxf1_elems
- rxb_elems txe_elems txb_elems>
- The 'offset' is an address offset of the Message RAM
- where the following elements start from. This is
- usually set to 0x0 if you're using a private Message
- RAM. The remain cells are used to specify how many
- elements are used for each FIFO/Buffer.
-
- M_CAN includes the following elements according to user manual:
- 11-bit Filter 0-128 elements / 0-128 words
- 29-bit Filter 0-64 elements / 0-128 words
- Rx FIFO 0 0-64 elements / 0-1152 words
- Rx FIFO 1 0-64 elements / 0-1152 words
- Rx Buffers 0-64 elements / 0-1152 words
- Tx Event FIFO 0-32 elements / 0-64 words
- Tx Buffers 0-32 elements / 0-576 words
-
- Please refer to 2.4.1 Message RAM Configuration in
- Bosch M_CAN user manual for details.
-
-Optional Subnode:
-- can-transceiver : Can-transceiver subnode describing maximum speed
- that can be used for CAN/CAN-FD modes. See
- Documentation/devicetree/bindings/net/can/can-transceiver.txt
- for details.
-Example:
-SoC dtsi:
-m_can1: can@...8000 {
- compatible = "bosch,m_can";
- reg = <0x020e8000 0x4000>, <0x02298000 0x4000>;
- reg-names = "m_can", "message_ram";
- interrupts = <0 114 0x04>,
- <0 114 0x04>;
- interrupt-names = "int0", "int1";
- clocks = <&clks IMX6SX_CLK_CANFD>,
- <&clks IMX6SX_CLK_CANFD>;
- clock-names = "hclk", "cclk";
- bosch,mram-cfg = <0x0 0 0 32 0 0 0 1>;
-};
-
-Board dts:
-&m_can1 {
- pinctrl-names = "default";
- pinctrl-0 = <&pinctrl_m_can1>;
- status = "enabled";
-
- can-transceiver {
- max-bitrate = <5000000>;
- };
-};
--
2.15.0
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