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ARM: dts: stm32: add CAN support on stm32f746

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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@amarulasolutions.com>
Link: https://lore.kernel.org/all/20230427204540.3126234-6-dario.binacchi@amarulasolutions.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Dario Binacchi 2023-04-27 22:45:40 +02:00 committed by Marc Kleine-Budde
parent 85a79b9711
commit 0920ccdf41
1 changed files with 47 additions and 0 deletions
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47
arch/arm/boot/dts/stm32f746.dtsi
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@ -257,6 +257,23 @@ rtc: rtc@40002800 {
status = "disabled";
};
can3: can@40003400 {
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@40003600 {
compatible = "st,stm32f4-gcan", "syscon";
reg = <0x40003600 0x200>;
clocks = <&rcc 0 STM32F7_APB1_CLOCK(CAN3)>;
};
usart2: serial@40004400 {
compatible = "st,stm32f7-uart";
reg = <0x40004400 0x400>;
@ -337,6 +354,36 @@ i2c4: i2c@40006000 {
status = "disabled";
};
can1: can@40006400 {
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@40006600 {
compatible = "st,stm32f4-gcan", "syscon";
reg = <0x40006600 0x200>;
clocks = <&rcc 0 STM32F7_APB1_CLOCK(CAN1)>;
};
can2: can@40006800 {
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@40006c00 {
compatible = "st,stm32-cec";
reg = <0x40006C00 0x400>;