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authorRamesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>2016-06-22 13:31:46 +0100
committerMarc Kleine-Budde <mkl@pengutronix.de>2016-06-23 11:23:49 +0200
commit6f4c2eea353809fb85386d5ce17a30e37042847d (patch)
tree12435f92ba47dc1a23518832f7991379d6cf2bed /Documentation/devicetree/bindings/net/can
parent2781ff5c8fc7722e97503f96686bf6d7093069a9 (diff)
can: rcar_canfd: Add Classical CAN only mode support
The controller can operate in one of the two global modes - CAN FD only mode (default) - Classical CAN (CAN2.0) only mode This patch adds support for Classical CAN only mode. It can be enabled by defining the optional device tree property "renesas,no-can-fd" of this node. Note: R-Car Gen3 h/w manual v0.51E shows bit6 of RSCFDnCFDGCFG as reserved, which is incorrect. This bit is same as RSCFDnGCFG. Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'Documentation/devicetree/bindings/net/can')
-rw-r--r--Documentation/devicetree/bindings/net/can/rcar_canfd.txt21
1 files changed, 14 insertions, 7 deletions
diff --git a/Documentation/devicetree/bindings/net/can/rcar_canfd.txt b/Documentation/devicetree/bindings/net/can/rcar_canfd.txt
index d45182bd21dd..22a6f10bab05 100644
--- a/Documentation/devicetree/bindings/net/can/rcar_canfd.txt
+++ b/Documentation/devicetree/bindings/net/can/rcar_canfd.txt
@@ -32,6 +32,12 @@ below properties.
- assigned-clocks: phandle of canfd clock.
- assigned-clock-rates: maximum frequency of this clock.
+Optional property:
+The controller can operate in either CAN FD only mode (default) or
+Classical CAN only mode. The mode is global to both the channels. In order to
+enable the later, define the following optional property.
+ - renesas,no-can-fd: puts the controller in Classical CAN only mode.
+
Example
-------
@@ -63,12 +69,13 @@ SoC common .dtsi file:
Board specific .dts file:
-E.g. below enables Channel 1 alone in the board.
+E.g. below enables Channel 1 alone in the board in Classical CAN only mode.
&canfd {
- pinctrl-0 = <&canfd1_pins>;
- pinctrl-names = "default";
- status = "okay";
+ pinctrl-0 = <&canfd1_pins>;
+ pinctrl-names = "default";
+ renesas,no-can-fd;
+ status = "okay";
channel1 {
status = "okay";
@@ -79,9 +86,9 @@ E.g. below enables Channel 0 alone in the board using External clock
as fCAN clock.
&canfd {
- pinctrl-0 = <&canfd0_pins &can_clk_pins>;
- pinctrl-names = "default";
- status = "okay";
+ pinctrl-0 = <&canfd0_pins &can_clk_pins>;
+ pinctrl-names = "default";
+ status = "okay";
channel0 {
status = "okay";