Whenever the data is transferred or stored on message ram, there are
inherent risks of it being lost or corruption known as single-bit errors.
ECC constantly scans data as it is processed to the message ram, using a
method known as parity checking and raise the error signals for corruption.
Add error correction code config property to enable/disable the
error correction code (ECC) functionality for Message RAM used to create
valid ECC checksums.
Signed-off-by: Chandrasekar R <rcsekar@xxxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Signed-off-by: Vivek Yadav <vivek.2311@xxxxxxxxxxx>
---
.../bindings/net/can/bosch,m_can.yaml | 31 +++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
index 26aa0830eea1..91dc458ec33f 100644
--- a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
+++ b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
@@ -50,6 +50,12 @@ properties:
- const: hclk
- const: cclk
+ tesla,mram-ecc-cfg:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description:
+ Handle to system control region that contains the ECC INIT register
+ and register offset to the ECC INIT register.
+
bosch,mram-cfg:
description: |
Message RAM configuration data.
@@ -149,4 +155,29 @@ examples:
};
};
+ # Example 2: m_can on the FSD SoC
+ - |
+ #include <dt-bindings/clock/fsd-clk.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ can@14088000 {
+ compatible = "bosch,m_can";
+ reg = <0x0 0x14088000 0x0 0x0200>,
+ <0x0 0x14080000 0x0 0x8000>;
+ reg-names = "m_can", "message_ram";
+ interrupts = <GIC_SPI 159 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 160 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "int0", "int1";
+ pinctrl-names = "default";
+ pinctrl-0 = <&m_can0_bus>;
+ clocks = <&clock_peric PERIC_MCAN0_IPCLKPORT_PCLK>,
+ <&clock_peric PERIC_MCAN0_IPCLKPORT_CCLK>;
+ clock-names = "hclk", "cclk";
+ tesla,mram-ecc-cfg = <&sysreg_peric 0x708>;
+ bosch,mram-cfg = <0x0 128 64 64 64 64 32 32>;
+ };
+ };
...
--
2.17.1
