The Allwinner A10/A20 SoCs have an on-board CAN (Controller Area Network)
controller. This patch adds the CAN core to the SoC's include files,
sun4i-a10.dtsi and sun7i-a20.dtsi.
On linux-can mailing list was a discussion about updating the device tree bindings
https://lkml.org/lkml/2015/9/17/220
but it did not progress past writing the documentation file.
Documentation/devicetree/bindings/net/can/sun4i_can.txt
The CAN controller can be enabled in a board specific dts file as
described in the documentation file or by using a device tree overlay.
I have tested the patch on a Banana Pi (A20 SoC) with mainline kernel 4.10.5.
History:
v4: fixed style problems,
changed device node position of ps20 and ps21 to fix ordering
by rising physical address
v3: added "allwinner,sun7i-a20-can" compatible to can0 device node contents,
make separate patches for device nodes and pinctrl settings
v2: changed can0_pins_a node contents to new generic binding method,
changed can0_pins_a node position by alphabetical order,
changed can0 device node position by rising physical address order
v1: initial
Patrick Menschel (6):
ARM: dts: sun4i: fix device node ordering
ARM: dts: sun4i: Add CAN node
ARM: dts: sun4i: Add can0_pins_a pinctrl settings
ARM: dts: sun7i: fix device node ordering
ARM: dts: sun7i: Add CAN node
ARM: dts: sun7i: Add can0_pins_a pinctrl settings
arch/arm/boot/dts/sun4i-a10.dtsi | 38 ++++++++++++++++++++++-----------
arch/arm/boot/dts/sun7i-a20.dtsi | 45 ++++++++++++++++++++++++++--------------
2 files changed, 56 insertions(+), 27 deletions(-)
--
2.7.4
This patch changes the device node position of ps20 and ps21 to fix
ordering by rising physical address.
From
uart7: serial@01c29c00
i2c0: i2c@01c2ac00
i2c1: i2c@01c2b000
i2c2: i2c@01c2b400
i2c3: i2c@01c2b800
i2c4: i2c@01c2c000
gmac: ethernet@01c50000
hstimer@01c60000
gic: interrupt-controller@01c81000
ps20: ps2@01c2a000
ps21: ps2@01c2a400
to
uart7: serial@01c29c00
ps20: ps2@01c2a000
ps21: ps2@01c2a400
i2c0: i2c@01c2ac00
i2c1: i2c@01c2b000
i2c2: i2c@01c2b400
i2c3: i2c@01c2b800
i2c4: i2c@01c2c000
gmac: ethernet@01c50000
hstimer@01c60000
gic: interrupt-controller@01c81000
Signed-off-by: Patrick Menschel <[email protected]>
---
arch/arm/boot/dts/sun7i-a20.dtsi | 31 ++++++++++++++++---------------
1 file changed, 16 insertions(+), 15 deletions(-)
diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
index 2db97fc..100b4e9 100644
--- a/arch/arm/boot/dts/sun7i-a20.dtsi
+++ b/arch/arm/boot/dts/sun7i-a20.dtsi
@@ -1538,6 +1538,22 @@
status = "disabled";
};
+ ps20: ps2@01c2a000 {
+ compatible = "allwinner,sun4i-a10-ps2";
+ reg = <0x01c2a000 0x400>;
+ interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&apb1_gates 6>;
+ status = "disabled";
+ };
+
+ ps21: ps2@01c2a400 {
+ compatible = "allwinner,sun4i-a10-ps2";
+ reg = <0x01c2a400 0x400>;
+ interrupts = <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&apb1_gates 7>;
+ status = "disabled";
+ };
+
i2c0: i2c@01c2ac00 {
compatible = "allwinner,sun7i-a20-i2c",
"allwinner,sun4i-a10-i2c";
@@ -1629,20 +1645,5 @@
interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
};
- ps20: ps2@01c2a000 {
- compatible = "allwinner,sun4i-a10-ps2";
- reg = <0x01c2a000 0x400>;
- interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&apb1_gates 6>;
- status = "disabled";
- };
-
- ps21: ps2@01c2a400 {
- compatible = "allwinner,sun4i-a10-ps2";
- reg = <0x01c2a400 0x400>;
- interrupts = <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&apb1_gates 7>;
- status = "disabled";
- };
};
};
--
2.7.4
The A10 SoC has an on-board CAN controller.
This patch adds the device node.
This patch is adapted from the description in
Documentation/devicetree/bindings/net/can/sun4i_can.txt
Signed-off-by: Patrick Menschel <[email protected]>
---
arch/arm/boot/dts/sun4i-a10.dtsi | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
index 498f7f2..4d8eaf2 100644
--- a/arch/arm/boot/dts/sun4i-a10.dtsi
+++ b/arch/arm/boot/dts/sun4i-a10.dtsi
@@ -1329,5 +1329,13 @@
#size-cells = <0>;
};
+ can0: can@01c2bc00 {
+ compatible = "allwinner,sun4i-a10-can";
+ reg = <0x01c2bc00 0x400>;
+ interrupts = <26>;
+ clocks = <&apb1_gates 4>;
+ status = "disabled";
+ };
+
};
};
--
2.7.4
This patch changes the device node position of ps20 and ps21 to fix
ordering by rising physical address.
From
uart7: serial@01c29c00
i2c0: i2c@01c2ac00
i2c1: i2c@01c2b000
i2c2: i2c@01c2b400
ps20: ps2@01c2a000
ps21: ps2@01c2a400
to
uart7: serial@01c29c00
ps20: ps2@01c2a000
ps21: ps2@01c2a400
i2c0: i2c@01c2ac00
i2c1: i2c@01c2b000
i2c2: i2c@01c2b400
Signed-off-by: Patrick Menschel <[email protected]>
---
arch/arm/boot/dts/sun4i-a10.dtsi | 31 ++++++++++++++++---------------
1 file changed, 16 insertions(+), 15 deletions(-)
diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
index ba20b48..498f7f2 100644
--- a/arch/arm/boot/dts/sun4i-a10.dtsi
+++ b/arch/arm/boot/dts/sun4i-a10.dtsi
@@ -1283,6 +1283,22 @@
status = "disabled";
};
+ ps20: ps2@01c2a000 {
+ compatible = "allwinner,sun4i-a10-ps2";
+ reg = <0x01c2a000 0x400>;
+ interrupts = <62>;
+ clocks = <&apb1_gates 6>;
+ status = "disabled";
+ };
+
+ ps21: ps2@01c2a400 {
+ compatible = "allwinner,sun4i-a10-ps2";
+ reg = <0x01c2a400 0x400>;
+ interrupts = <63>;
+ clocks = <&apb1_gates 7>;
+ status = "disabled";
+ };
+
i2c0: i2c@01c2ac00 {
compatible = "allwinner,sun4i-a10-i2c";
reg = <0x01c2ac00 0x400>;
@@ -1313,20 +1329,5 @@
#size-cells = <0>;
};
- ps20: ps2@01c2a000 {
- compatible = "allwinner,sun4i-a10-ps2";
- reg = <0x01c2a000 0x400>;
- interrupts = <62>;
- clocks = <&apb1_gates 6>;
- status = "disabled";
- };
-
- ps21: ps2@01c2a400 {
- compatible = "allwinner,sun4i-a10-ps2";
- reg = <0x01c2a400 0x400>;
- interrupts = <63>;
- clocks = <&apb1_gates 7>;
- status = "disabled";
- };
};
};
--
2.7.4
The A20 SoC has an on-board CAN controller. This patch adds
the pinctrl settings for pins PH20 and PH21.
This patch is adapted from the description in
Documentation/devicetree/bindings/net/can/sun4i_can.txt
Signed-off-by: Patrick Menschel <[email protected]>
---
arch/arm/boot/dts/sun7i-a20.dtsi | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
index edf85ca..31aaa02 100644
--- a/arch/arm/boot/dts/sun7i-a20.dtsi
+++ b/arch/arm/boot/dts/sun7i-a20.dtsi
@@ -1096,6 +1096,11 @@
#interrupt-cells = <3>;
#gpio-cells = <3>;
+ can0_pins_a: can0@0 {
+ pins = "PH20", "PH21";
+ function = "can";
+ };
+
clk_out_a_pins_a: clk_out_a@0 {
pins = "PI12";
function = "clk_out_a";
--
2.7.4
The A20 SoC has an on-board CAN controller.
This patch adds the device node.
The CAN controller is inherited from the A10 SoC and uses the same driver.
This patch is adapted from the description in
Documentation/devicetree/bindings/net/can/sun4i_can.txt
Signed-off-by: Patrick Menschel <[email protected]>
---
arch/arm/boot/dts/sun7i-a20.dtsi | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
index 100b4e9..edf85ca 100644
--- a/arch/arm/boot/dts/sun7i-a20.dtsi
+++ b/arch/arm/boot/dts/sun7i-a20.dtsi
@@ -1598,6 +1598,15 @@
#size-cells = <0>;
};
+ can0: can@01c2bc00 {
+ compatible = "allwinner,sun7i-a20-can",
+ "allwinner,sun4i-a10-can";
+ reg = <0x01c2bc00 0x400>;
+ interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&apb1_gates 4>;
+ status = "disabled";
+ };
+
i2c4: i2c@01c2c000 {
compatible = "allwinner,sun7i-a20-i2c",
"allwinner,sun4i-a10-i2c";
--
2.7.4
The A10 SoC has an on-board CAN controller. This patch adds the
pinctrl settings for pins PH20 and PH21.
This patch is adapted from the description in
Documentation/devicetree/bindings/net/can/sun4i_can.txt
Signed-off-by: Patrick Menschel <[email protected]>
---
arch/arm/boot/dts/sun4i-a10.dtsi | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
index 4d8eaf2..e72d67d 100644
--- a/arch/arm/boot/dts/sun4i-a10.dtsi
+++ b/arch/arm/boot/dts/sun4i-a10.dtsi
@@ -974,6 +974,11 @@
#interrupt-cells = <3>;
#gpio-cells = <3>;
+ can0_pins_a: can0@0 {
+ pins = "PH20", "PH21";
+ function = "can";
+ };
+
emac_pins_a: emac0@0 {
pins = "PA0", "PA1", "PA2",
"PA3", "PA4", "PA5", "PA6",
--
2.7.4
On Tue, Apr 04, 2017 at 08:36:26PM +0200, Patrick Menschel wrote:
> The Allwinner A10/A20 SoCs have an on-board CAN (Controller Area Network)
> controller. This patch adds the CAN core to the SoC's include files,
> sun4i-a10.dtsi and sun7i-a20.dtsi.
>
> On linux-can mailing list was a discussion about updating the device tree bindings
> https://lkml.org/lkml/2015/9/17/220
> but it did not progress past writing the documentation file.
> Documentation/devicetree/bindings/net/can/sun4i_can.txt
>
> The CAN controller can be enabled in a board specific dts file as
> described in the documentation file or by using a device tree overlay.
Applied 1 and 4. The others were already merged.
Thanks!
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com