[PATCH v2 0/2] usb: dwc3: add glue driver for Hi3798MV200

[PATCH v2 0/2] usb: dwc3: add glue driver for Hi3798MV200

[Yang Xiwen via B4 Relay]

Hi3798MV200 uses DWC3 with a few more clocks and a dedicated reset.

Note xhci-histb.c can also be used. But since it's DWC3 in fact, trying
to support it with the help of DWC3 framework seems a better solution.

Hi3798CV200 can also try to migrate to this driver too. Thus we can
remove xhci-histb.c in the future.

Signed-off-by: Yang Xiwen <forbidden405@outlook.com>
---
Changes in v2:
- remove histb-clock.h as it's deprecated.
- fix bot error (Rob Herring)
- add a dummy reg property to make simple-bus parent node happy.
  (duplicate with subnode, not used in driver)
- Link to v1: https://lore.kernel.org/r/20240224-dwc3-v1-0-7ffb2e2baa73@outlook.com

---
Yang Xiwen (2):
      dt-bindings: usb: add hisilicon,hi3798mv200-dwc3
      usb: dwc3: of-simple: Add compatible for hi3798mv200 DWC3 controller

 .../bindings/usb/hisilicon,hi3798mv200-dwc3.yaml   | 103 +++++++++++++++++++++
 drivers/usb/dwc3/dwc3-of-simple.c                  |   1 +
 2 files changed, 104 insertions(+)
---
base-commit: 8d3dea210042f54b952b481838c1e7dfc4ec751d
change-id: 20240217-dwc3-697828b480aa

Best regards,
-- 
Yang Xiwen <forbidden405@outlook.com>

[PATCH v2 1/2] dt-bindings: usb: add hisilicon,hi3798mv200-dwc3

[Yang Xiwen via B4 Relay]

From: Yang Xiwen <forbidden405@outlook.com>

Document the DWC3 controller used by Hi3798MV200.

Signed-off-by: Yang Xiwen <forbidden405@outlook.com>
---
 .../bindings/usb/hisilicon,hi3798mv200-dwc3.yaml   | 103 +++++++++++++++++++++
 1 file changed, 103 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/hisilicon,hi3798mv200-dwc3.yaml b/Documentation/devicetree/bindings/usb/hisilicon,hi3798mv200-dwc3.yaml
new file mode 100644
index 000000000000..2a93d659414d
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/hisilicon,hi3798mv200-dwc3.yaml
@@ -0,0 +1,103 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/hisilicon,hi3798mv200-dwc3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HiSilicon Hi3798MV200 DWC3 USB SoC controller
+
+maintainers:
+  - Yang Xiwen <forbidden405@foxmail.com>
+
+properties:
+  compatible:
+    const: hisilicon,hi3798mv200-dwc3
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+  reg: true
+
+  ranges: true
+
+  clocks:
+    items:
+      - description: Controller bus clock
+      - description: Controller suspend clock
+      - description: Controller reference clock
+      - description: Controller gm clock
+      - description: Controller gs clock
+      - description: Controller utmi clock
+      - description: Controller pipe clock
+
+  clock-names:
+    items:
+      - const: bus
+      - const: suspend
+      - const: ref
+      - const: gm
+      - const: gs
+      - const: utmi
+      - const: pipe
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: soft
+
+patternProperties:
+  '^usb@[0-9a-z]+$':
+    $ref: snps,dwc3.yaml#
+
+additionalProperties: false
+
+required:
+  - compatible
+  - '#address-cells'
+  - '#size-cells'
+  - ranges
+  - reg
+  - clocks
+  - clock-names
+  - resets
+  - reset-names
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    usb@98a0000 {
+            compatible = "hisilicon,hi3798mv200-dwc3";
+            #address-cells = <1>;
+            #size-cells = <1>;
+            reg = <0x98a0000 0x10000>;
+            ranges;
+            clocks = <&clk_bus>,
+                     <&clk_suspend>,
+                     <&clk_ref>,
+                     <&clk_gm>,
+                     <&clk_gs>,
+                     <&clk_utmi>,
+                     <&clk_pipe>;
+            clock-names = "bus", "suspend", "ref", "gm", "gs", "utmi", "pipe";
+            resets = <&crg 0xb0 12>;
+            reset-names = "soft";
+
+            usb@98a0000 {
+                    compatible = "snps,dwc3";
+                    reg = <0x98a0000 0x10000>;
+                    interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
+                    clocks = <&clk_bus>,
+                             <&clk_suspend>,
+                             <&clk_ref>;
+                    clock-names = "bus_early", "suspend", "ref";
+                    phys = <&usb2_phy1_port2>, <&combphy0 0>;
+                    phy-names = "usb2-phy", "usb3-phy";
+                    maximum-speed = "super-speed";
+                    dr_mode = "host";
+            };
+    };

-- 
2.43.0

[PATCH v2 2/2] usb: dwc3: of-simple: Add compatible for hi3798mv200 DWC3 controller

[Yang Xiwen via B4 Relay]

From: Yang Xiwen <forbidden405@outlook.com>

Hi3798MV200 uses dwc3 controller with a few more clocks and a dedicated
resets. Use of_simple driver for it.

Signed-off-by: Yang Xiwen <forbidden405@outlook.com>
---
 drivers/usb/dwc3/dwc3-of-simple.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
index d1539fc9eabd..158acae08af5 100644
--- a/drivers/usb/dwc3/dwc3-of-simple.c
+++ b/drivers/usb/dwc3/dwc3-of-simple.c
@@ -173,6 +173,7 @@ static const struct of_device_id of_dwc3_simple_match[] = {
 	{ .compatible = "sprd,sc9860-dwc3" },
 	{ .compatible = "allwinner,sun50i-h6-dwc3" },
 	{ .compatible = "hisilicon,hi3670-dwc3" },
+	{ .compatible = "hisilicon,hi3798mv200-dwc3" },
 	{ .compatible = "intel,keembay-dwc3" },
 	{ /* Sentinel */ }
 };

-- 
2.43.0

Re: [PATCH v2 1/2] dt-bindings: usb: add hisilicon,hi3798mv200-dwc3

[Krzysztof Kozlowski]

On 23/02/2024 22:43, Yang Xiwen via B4 Relay wrote:
> From: Yang Xiwen <forbidden405@outlook.com>
> 
> Document the DWC3 controller used by Hi3798MV200.
> 
> Signed-off-by: Yang Xiwen <forbidden405@outlook.com>


> +
> +properties:
> +  compatible:
> +    const: hisilicon,hi3798mv200-dwc3
> +
> +  '#address-cells':
> +    const: 1
> +
> +  '#size-cells':
> +    const: 1
> +
> +  reg: true

Constraints. maxItems: X

> +
> +  ranges: true
> +
> +  clocks:
> +    items:
> +      - description: Controller bus clock
> +      - description: Controller suspend clock
> +      - description: Controller reference clock
> +      - description: Controller gm clock
> +      - description: Controller gs clock
> +      - description: Controller utmi clock
> +      - description: Controller pipe clock
> +
> +  clock-names:
> +    items:
> +      - const: bus
> +      - const: suspend
> +      - const: ref
> +      - const: gm
> +      - const: gs
> +      - const: utmi
> +      - const: pipe
> +
> +  resets:
> +    maxItems: 1
> +
> +  reset-names:
> +    const: soft
> +
> +patternProperties:
> +  '^usb@[0-9a-z]+$':

unit addresses are in hex, so a-f

Open existing bindings and look how it is done there. There are no
bindings for DWC3 glue/wrapper device having a-z.


> +    $ref: snps,dwc3.yaml#
> +
> +additionalProperties: false

Same comments: open existing bindings and take a look how it is there.
This goes after 'required:' block.

> +
> +required:
> +  - compatible
> +  - '#address-cells'
> +  - '#size-cells'
> +  - ranges
> +  - reg
> +  - clocks
> +  - clock-names
> +  - resets
> +  - reset-names
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    usb@98a0000 {
> +            compatible = "hisilicon,hi3798mv200-dwc3";

reg is always the second property. ranges is third.


> +            #address-cells = <1>;
> +            #size-cells = <1>;

Use 4 spaces for example indentation.



Best regards,
Krzysztof

Re: [PATCH v2 1/2] dt-bindings: usb: add hisilicon,hi3798mv200-dwc3

[Yang Xiwen]

On 2/24/2024 6:28 PM, Krzysztof Kozlowski wrote:
> On 23/02/2024 22:43, Yang Xiwen via B4 Relay wrote:
>> From: Yang Xiwen <forbidden405@outlook.com>
>>
>> Document the DWC3 controller used by Hi3798MV200.
>>
>> Signed-off-by: Yang Xiwen <forbidden405@outlook.com>
>
>> +
>> +properties:
>> +  compatible:
>> +    const: hisilicon,hi3798mv200-dwc3
>> +
>> +  '#address-cells':
>> +    const: 1
>> +
>> +  '#size-cells':
>> +    const: 1
>> +
>> +  reg: true
> Constraints. maxItems: X


Is it mandatory to have this property if this node is going to be under 
a "simple-bus"? I'm taking rk3399-dwc3.yaml as reference. In fact, dwc3 
wrapper on mv200 does not have an extra register space. The wrapper only 
needs to turn on the clocks and deassert the resets. It does not 
need/have a register space.


I don't think it makes sense duplicating the same address twice.


But reg property is required by "simple-bus" so i don't know why there 
is no warning for rk3399-dwc3.


>
>> +
>> +  ranges: true
>> +
>> +  clocks:
>> +    items:
>> +      - description: Controller bus clock
>> +      - description: Controller suspend clock
>> +      - description: Controller reference clock
>> +      - description: Controller gm clock
>> +      - description: Controller gs clock
>> +      - description: Controller utmi clock
>> +      - description: Controller pipe clock
>> +
>> +  clock-names:
>> +    items:
>> +      - const: bus
>> +      - const: suspend
>> +      - const: ref
>> +      - const: gm
>> +      - const: gs
>> +      - const: utmi
>> +      - const: pipe
>> +
>> +  resets:
>> +    maxItems: 1
>> +
>> +  reset-names:
>> +    const: soft
>> +
>> +patternProperties:
>> +  '^usb@[0-9a-z]+$':
> unit addresses are in hex, so a-f
>
> Open existing bindings and look how it is done there. There are no
> bindings for DWC3 glue/wrapper device having a-z.
>
>
>> +    $ref: snps,dwc3.yaml#
>> +
>> +additionalProperties: false
> Same comments: open existing bindings and take a look how it is there.
> This goes after 'required:' block.
>
>> +
>> +required:
>> +  - compatible
>> +  - '#address-cells'
>> +  - '#size-cells'
>> +  - ranges
>> +  - reg
>> +  - clocks
>> +  - clock-names
>> +  - resets
>> +  - reset-names
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +
>> +    usb@98a0000 {
>> +            compatible = "hisilicon,hi3798mv200-dwc3";
> reg is always the second property. ranges is third.
>
>
>> +            #address-cells = <1>;
>> +            #size-cells = <1>;
> Use 4 spaces for example indentation.
>
>
>
> Best regards,
> Krzysztof
>

-- 
Regards,
Yang Xiwen

Re: [PATCH v2 1/2] dt-bindings: usb: add hisilicon,hi3798mv200-dwc3

[Krzysztof Kozlowski]

On 24/02/2024 12:33, Yang Xiwen wrote:
> On 2/24/2024 6:28 PM, Krzysztof Kozlowski wrote:
>> On 23/02/2024 22:43, Yang Xiwen via B4 Relay wrote:
>>> From: Yang Xiwen <forbidden405@outlook.com>
>>>
>>> Document the DWC3 controller used by Hi3798MV200.
>>>
>>> Signed-off-by: Yang Xiwen <forbidden405@outlook.com>
>>
>>> +
>>> +properties:
>>> +  compatible:
>>> +    const: hisilicon,hi3798mv200-dwc3
>>> +
>>> +  '#address-cells':
>>> +    const: 1
>>> +
>>> +  '#size-cells':
>>> +    const: 1
>>> +
>>> +  reg: true
>> Constraints. maxItems: X
> 
> 
> Is it mandatory to have this property if this node is going to be under 
> a "simple-bus"? I'm taking rk3399-dwc3.yaml as reference. In fact, dwc3 
> wrapper on mv200 does not have an extra register space. The wrapper only 
> needs to turn on the clocks and deassert the resets. It does not 
> need/have a register space.

Then why did you add it? No, the property is not mandatory. Write
bindings in a way they match hardware...

> 
> 
> I don't think it makes sense duplicating the same address twice.
> 
> 
> But reg property is required by "simple-bus" so i don't know why there 
> is no warning for rk3399-dwc3.

I don't think it is. ranges or reg is.

Best regards,
Krzysztof