mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
42eaad8087
CAN driver uses the clk_get_rate call to determine the frequency of the functional clock. OMAP based SoCs do not require the clock property since hwmod already handles creating a "fck" clock thats accessible to drivers. However, this isn't the case for 66AK2G which makes the clocks property require for that SoC. 66AK2G requires a new property. Therefore, update the binding to also make this property requirement clear. Also clarify that for OMAP based SoCs ti,hwmod is a required property. Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com> Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
66 lines
2.0 KiB
Plaintext
66 lines
2.0 KiB
Plaintext
Bosch C_CAN/D_CAN controller Device Tree Bindings
|
|
-------------------------------------------------
|
|
|
|
Required properties:
|
|
- compatible : Should be "bosch,c_can" for C_CAN controllers and
|
|
"bosch,d_can" for D_CAN controllers.
|
|
Can be "ti,dra7-d_can", "ti,am3352-d_can" or
|
|
"ti,am4372-d_can".
|
|
- reg : physical base address and size of the C_CAN/D_CAN
|
|
registers map
|
|
- interrupts : property with a value describing the interrupt
|
|
number
|
|
|
|
The following are mandatory properties for DRA7x, AM33xx and AM43xx SoCs only:
|
|
- ti,hwmods : Must be "d_can<n>" or "c_can<n>", n being the
|
|
instance number
|
|
|
|
The following are mandatory properties for Keystone 2 66AK2G SoCs only:
|
|
- power-domains : Should contain a phandle to a PM domain provider node
|
|
and an args specifier containing the DCAN device id
|
|
value. This property is as per the binding,
|
|
Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
|
|
- clocks : CAN functional clock phandle. This property is as per the
|
|
binding,
|
|
Documentation/devicetree/bindings/clock/ti,sci-clk.txt
|
|
|
|
Optional properties:
|
|
- syscon-raminit : Handle to system control region that contains the
|
|
RAMINIT register, register offset to the RAMINIT
|
|
register and the CAN instance number (0 offset).
|
|
|
|
Note: "ti,hwmods" field is used to fetch the base address and irq
|
|
resources from TI, omap hwmod data base during device registration.
|
|
Future plan is to migrate hwmod data base contents into device tree
|
|
blob so that, all the required data will be used from device tree dts
|
|
file.
|
|
|
|
Example:
|
|
|
|
Step1: SoC common .dtsi file
|
|
|
|
dcan1: d_can@481d0000 {
|
|
compatible = "bosch,d_can";
|
|
reg = <0x481d0000 0x2000>;
|
|
interrupts = <55>;
|
|
interrupt-parent = <&intc>;
|
|
status = "disabled";
|
|
};
|
|
|
|
(or)
|
|
|
|
dcan1: d_can@481d0000 {
|
|
compatible = "bosch,d_can";
|
|
ti,hwmods = "d_can1";
|
|
reg = <0x481d0000 0x2000>;
|
|
interrupts = <55>;
|
|
interrupt-parent = <&intc>;
|
|
status = "disabled";
|
|
};
|
|
|
|
Step 2: board specific .dts file
|
|
|
|
&dcan1 {
|
|
status = "okay";
|
|
};
|