From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
To: linux-kernel@vger.kernel.org
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>,
Amarula patchwork <linux-amarula@amarulasolutions.com>,
Marc Kleine-Budde <mkl@pengutronix.de>,
michael@amarulasolutions.com,
Dario Binacchi <dario.binacchi@amarulasolutions.com>,
Dario Binacchi <dariobin@libero.it>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Paolo Abeni <pabeni@redhat.com>, Rob Herring <robh+dt@kernel.org>,
Wolfgang Grandegger <wg@grandegger.com>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-can@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com, netdev@vger.kernel.org
Subject: [RFC PATCH v2 1/4] dt-bindings: net: can: add STM32 bxcan DT bindings
Date: Sat, 20 Aug 2022 10:29:33 +0200 [thread overview]
Message-ID: <20220820082936.686924-2-dario.binacchi@amarulasolutions.com> (raw)
In-Reply-To: <20220820082936.686924-1-dario.binacchi@amarulasolutions.com>
Add documentation of device tree bindings for the STM32 basic extended
CAN (bxcan) controller.
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---
Changes in v2:
- Change the file name into 'st,stm32-bxcan-core.yaml'.
- Rename compatibles:
- st,stm32-bxcan-core -> st,stm32f4-bxcan-core
- st,stm32-bxcan -> st,stm32f4-bxcan
- Rename master property to st,can-master.
- Remove the status property from the example.
- Put the node child properties as required.
.../bindings/net/can/st,stm32-bxcan.yaml | 136 ++++++++++++++++++
1 file changed, 136 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/can/st,stm32-bxcan.yaml
diff --git a/Documentation/devicetree/bindings/net/can/st,stm32-bxcan.yaml b/Documentation/devicetree/bindings/net/can/st,stm32-bxcan.yaml
new file mode 100644
index 000000000000..288631b5556d
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/st,stm32-bxcan.yaml
@@ -0,0 +1,136 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/can/st,stm32-bxcan.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics bxCAN controller
+
+description: STMicroelectronics BxCAN controller for CAN bus
+
+maintainers:
+ - Dario Binacchi <dario.binacchi@amarulasolutions.com>
+
+allOf:
+ - $ref: can-controller.yaml#
+
+properties:
+ compatible:
+ enum:
+ - st,stm32f4-bxcan-core
+
+ reg:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+ clocks:
+ description:
+ Input clock for registers access
+ maxItems: 1
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - resets
+ - clocks
+ - '#address-cells'
+ - '#size-cells'
+
+patternProperties:
+ "^can@[0-9]+$":
+ type: object
+ description:
+ A CAN block node contains two subnodes, representing each one a CAN
+ instance available on the machine.
+
+ properties:
+ compatible:
+ enum:
+ - st,stm32f4-bxcan
+
+ st,can-master:
+ description:
+ Master and slave mode of the bxCAN peripheral is only relevant
+ if the chip has two CAN peripherals. In that case they share
+ some of the required logic, and that means you cannot use the
+ slave CAN without the master CAN.
+ type: boolean
+
+ reg:
+ description: |
+ Offset of CAN instance in CAN block. Valid values are:
+ - 0x0: CAN1
+ - 0x400: CAN2
+ maxItems: 1
+
+ interrupts:
+ items:
+ - description: transmit interrupt
+ - description: FIFO 0 receive interrupt
+ - description: FIFO 1 receive interrupt
+ - description: status change error interrupt
+
+ interrupt-names:
+ items:
+ - const: tx
+ - const: rx0
+ - const: rx1
+ - const: sce
+
+ resets:
+ maxItems: 1
+
+ clocks:
+ description:
+ Input clock for registers access
+ maxItems: 1
+
+ additionalProperties: false
+
+ required:
+ - compatible
+ - reg
+ - interrupts
+ - resets
+
+examples:
+ - |
+ #include <dt-bindings/clock/stm32fx-clock.h>
+ #include <dt-bindings/mfd/stm32f4-rcc.h>
+
+ can: can@40006400 {
+ compatible = "st,stm32f4-bxcan-core";
+ reg = <0x40006400 0x800>;
+ resets = <&rcc STM32F4_APB1_RESET(CAN1)>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(CAN1)>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ can1: can@0 {
+ compatible = "st,stm32f4-bxcan";
+ reg = <0x0>;
+ interrupts = <19>, <20>, <21>, <22>;
+ interrupt-names = "tx", "rx0", "rx1", "sce";
+ resets = <&rcc STM32F4_APB1_RESET(CAN1)>;
+ st,can-master;
+ };
+
+ can2: can@400 {
+ compatible = "st,stm32f4-bxcan";
+ reg = <0x400>;
+ interrupts = <63>, <64>, <65>, <66>;
+ interrupt-names = "tx", "rx0", "rx1", "sce";
+ resets = <&rcc STM32F4_APB1_RESET(CAN2)>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(CAN2)>;
+ };
+ };
--
2.32.0
next prev parent reply other threads:[~2022-08-20 8:30 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-20 8:29 [RFC PATCH v2 0/4] can: bxcan: add support for ST bxCAN controller Dario Binacchi
2022-08-20 8:29 ` Dario Binacchi [this message]
2022-08-23 13:41 ` [RFC PATCH v2 1/4] dt-bindings: net: can: add STM32 bxcan DT bindings Krzysztof Kozlowski
2022-08-26 7:12 ` Dario Binacchi
2022-08-25 21:12 ` Rob Herring
2022-08-26 7:27 ` Dario Binacchi
2022-08-31 22:05 ` Rob Herring
2022-08-20 8:29 ` [RFC PATCH v2 2/4] ARM: dts: stm32: add CAN support on stm32f429 Dario Binacchi
2022-08-20 8:29 ` [RFC PATCH v2 3/4] ARM: dts: stm32: add pin map for CAN controller on stm32f4 Dario Binacchi
2022-08-23 13:43 ` Krzysztof Kozlowski
2022-08-26 6:32 ` Dario Binacchi
2022-08-20 8:29 ` [RFC PATCH v2 4/4] can: bxcan: add support for ST bxCAN controller Dario Binacchi
2022-08-26 21:56 ` Vincent Mailhol
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