linux-kernel - [PATCH AUTOSEL 4.19 20/27] ARM: dts: stm32: add CAN support on stm32f746

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Message-Id: <20230525184356.1974216-20-sashal@kernel.org>
Date:   Thu, 25 May 2023 14:43:46 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Sasha Levin <sashal@...nel.org>, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        mcoquelin.stm32@...il.com, alexandre.torgue@...s.st.com,
        devicetree@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 4.19 20/27] ARM: dts: stm32: add CAN support on stm32f746

From: Dario Binacchi <dario.binacchi@...rulasolutions.com>

[ Upstream commit 0920ccdf41e3078a4dd2567eb905ea154bc826e6 ]

Add support for bxcan (Basic eXtended CAN controller) to STM32F746. The
chip contains three CAN peripherals, CAN1 and CAN2 in dual peripheral
configuration and CAN3 in single peripheral configuration:
- Dual CAN peripheral configuration:
  * CAN1: Primary bxCAN for managing the communication between a secondary
    bxCAN and the 512-byte SRAM memory.
  * CAN2: Secondary bxCAN with no direct access to the SRAM memory.
  This means that the two bxCAN cells share the 512-byte SRAM memory and
  CAN2 can't be used without enabling CAN1.
- Single CAN peripheral configuration:
  * CAN3: Primary bxCAN with dedicated Memory Access Controller unit and
    512-byte SRAM memory.

 -------------------------------------------------------------------------
| features | CAN1              | CAN2               | CAN 3               |
 -------------------------------------------------------------------------
| SRAM     | 512-byte shared between CAN1 & CAN2    | 512-byte            |
 -------------------------------------------------------------------------
| Filters  | 26 filters shared between CAN1 & CAN2  | 14 filters          |
 -------------------------------------------------------------------------

Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
Link: https://lore.kernel.org/all/20230427204540.3126234-6-dario.binacchi@amarulasolutions.com
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/boot/dts/stm32f746.dtsi | 47 ++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/arch/arm/boot/dts/stm32f746.dtsi b/arch/arm/boot/dts/stm32f746.dtsi
index be62d9091e038..724bc7c88685f 100644
--- a/arch/arm/boot/dts/stm32f746.dtsi
+++ b/arch/arm/boot/dts/stm32f746.dtsi
@@ -297,6 +297,23 @@ rtc: rtc@...02800 {
 			status = "disabled";
 		};
 
+		can3: can@...03400 {
+			compatible = "st,stm32f4-bxcan";
+			reg = <0x40003400 0x200>;
+			interrupts = <104>, <105>, <106>, <107>;
+			interrupt-names = "tx", "rx0", "rx1", "sce";
+			resets = <&rcc STM32F7_APB1_RESET(CAN3)>;
+			clocks = <&rcc 0 STM32F7_APB1_CLOCK(CAN3)>;
+			st,gcan = <&gcan3>;
+			status = "disabled";
+		};
+
+		gcan3: gcan@...03600 {
+			compatible = "st,stm32f4-gcan", "syscon";
+			reg = <0x40003600 0x200>;
+			clocks = <&rcc 0 STM32F7_APB1_CLOCK(CAN3)>;
+		};
+
 		usart2: serial@...04400 {
 			compatible = "st,stm32f7-uart";
 			reg = <0x40004400 0x400>;
@@ -377,6 +394,36 @@ i2c4: i2c@...06000 {
 			status = "disabled";
 		};
 
+		can1: can@...06400 {
+			compatible = "st,stm32f4-bxcan";
+			reg = <0x40006400 0x200>;
+			interrupts = <19>, <20>, <21>, <22>;
+			interrupt-names = "tx", "rx0", "rx1", "sce";
+			resets = <&rcc STM32F7_APB1_RESET(CAN1)>;
+			clocks = <&rcc 0 STM32F7_APB1_CLOCK(CAN1)>;
+			st,can-primary;
+			st,gcan = <&gcan1>;
+			status = "disabled";
+		};
+
+		gcan1: gcan@...06600 {
+			compatible = "st,stm32f4-gcan", "syscon";
+			reg = <0x40006600 0x200>;
+			clocks = <&rcc 0 STM32F7_APB1_CLOCK(CAN1)>;
+		};
+
+		can2: can@...06800 {
+			compatible = "st,stm32f4-bxcan";
+			reg = <0x40006800 0x200>;
+			interrupts = <63>, <64>, <65>, <66>;
+			interrupt-names = "tx", "rx0", "rx1", "sce";
+			resets = <&rcc STM32F7_APB1_RESET(CAN2)>;
+			clocks = <&rcc 0 STM32F7_APB1_CLOCK(CAN2)>;
+			st,can-secondary;
+			st,gcan = <&gcan1>;
+			status = "disabled";
+		};
+
 		cec: cec@...06c00 {
 			compatible = "st,stm32-cec";
 			reg = <0x40006C00 0x400>;
-- 
2.39.2