[PATCH] can: rcar_can: Add r8a7795 support

Ramesh Shanmugasundaram
2016-02-29T12:37:25Z

Added r8a7795 SoC support.

Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>
---
Hi All,

This patch is based on linux-can-next (tag:linux-can-next-for-4.6-20160226)

Pinctrl & Clock related to the controller are already submitted as below:

https://lkml.org/lkml/2016/2/25/546
https://lkml.org/lkml/2016/2/26/452
http://www.spinics.net/lists/arm-kernel/msg487238.html

Changes since v1:
* Rebased from linux-next to linux-can-next
* Removed clock rounding hack (http://www.spinics.net/lists/netdev/msg366611.html)
* CAN dtsi changes will be submitted separately based on linux-next (http://marc.info/?l=linux-can&m=145674764815430&w=2)

Documentation/devicetree/bindings/net/can/rcar_can.txt | 11 +++++++++++
drivers/net/can/Kconfig | 2 +-
drivers/net/can/rcar_can.c | 1 +
3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/can/rcar_can.txt b/Documentation/devicetree/bindings/net/can/rcar_can.txt
index 65edc05..8d40ab2 100644
--- a/Documentation/devicetree/bindings/net/can/rcar_can.txt
+++ b/Documentation/devicetree/bindings/net/can/rcar_can.txt
@@ -9,8 +9,10 @@ Required properties:
"renesas,can-r8a7792" if CAN controller is a part of R8A7792 SoC.
"renesas,can-r8a7793" if CAN controller is a part of R8A7793 SoC.
"renesas,can-r8a7794" if CAN controller is a part of R8A7794 SoC.
+ "renesas,can-r8a7795" if CAN controller is a part of R8A7795 SoC.
"renesas,rcar-gen1-can" for a generic R-Car Gen1 compatible device.
"renesas,rcar-gen2-can" for a generic R-Car Gen2 compatible device.
+ "renesas,rcar-gen3-can" for a generic R-Car Gen3 compatible device.
When compatible with the generic version, nodes must list the
SoC-specific version corresponding to the platform first
followed by the generic version.
@@ -22,6 +24,15 @@ Required properties:
- pinctrl-0: pin control group to be used for this controller.
- pinctrl-names: must be "default".

+Required properties for "renesas,can-r8a7795" compatible:
+In R8A7795 SoC, "clkp2" can be CANFD clock. This is a div6 clock and can be
+used by both CAN and CAN FD controller at the same time. It needs to be scaled
+to maximum frequency if any of these controllers use it. This is done using
+the below properties.
+
+- assigned-clocks: phandle of clkp2(CANFD) clock.
+- assigned-clock-rates: maximum frequency of this clock.
+
Optional properties:
- renesas,can-clock-select: R-Car CAN Clock Source Select. Valid values are:
<0x0> (default) : Peripheral clock (clkp1)
diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
index 164ccde..0d40aef 100644
--- a/drivers/net/can/Kconfig
+++ b/drivers/net/can/Kconfig
@@ -106,7 +106,7 @@ config CAN_JANZ_ICAN3

config CAN_RCAR
tristate "Renesas R-Car CAN controller"
- depends on ARM
+ depends on ARCH_RENESAS || ARM
---help---
Say Y here if you want to use CAN controller found on Renesas R-Car
SoCs.
diff --git a/drivers/net/can/rcar_can.c b/drivers/net/can/rcar_can.c
index ad3d2e0..788459f 100644
--- a/drivers/net/can/rcar_can.c
+++ b/drivers/net/can/rcar_can.c
@@ -906,6 +906,7 @@ static const struct of_device_id rcar_can_of_table[] __maybe_unused = {
{ .compatible = "renesas,can-r8a7791" },
{ .compatible = "renesas,rcar-gen1-can" },
{ .compatible = "renesas,rcar-gen2-can" },
+ { .compatible = "renesas,rcar-gen3-can" },
{ }
};
MODULE_DEVICE_TABLE(of, rcar_can_of_table);
--
1.9.1