On 5/9/23 18:04, Krzysztof Kozlowski wrote:
On 09/05/2023 16:19, Michal Simek wrote:
On 5/7/23 10:07, Krzysztof Kozlowski wrote:
On 05/05/2023 15:25, Michal Simek wrote:
The Microchip usb5744 is a SS/HS USB 3.0 hub controller with 4 ports.
The binding describes USB related aspects of the USB5744 hub, it as
well cover the option of connecting the controller as an i2c slave.
When i2c interface is connected hub needs to be initialized first.
Hub itself has fixed i2c address 0x2D but hardcoding address is not good
idea because address can be shifted by i2c address translator in the
middle.
Signed-off-by: Piyush Mehta <piyush.mehta@xxxxxxx>
Signed-off-by: Michal Simek <michal.simek@xxxxxxx>
---
Changes in v2:
- fix i2c-bus property
- swap usb2.0/3.0 compatible strings
- fix indentation in example (4 spaces)
- add new i2c node with microchip,usb5744 compatible property
It looks like that usb8041 has also an optional i2c interface which is not
covered. But it is mentioned at commit 40e58a8a7ca6 ("dt-bindings: usb:
Add binding for TI USB8041 hub controller").
i2c-bus name property was suggested by Rob at
https://lore.kernel.org/all/CAL_JsqJedhX6typpUKbnzV7CLK6UZVjq3CyG9iY_j5DLPqvVdw@xxxxxxxxxxxxxx/
and
https://lore.kernel.org/all/CAL_JsqJZBbu+UXqUNdZwg-uv0PAsNg55026PTwhKr5wQtxCjVQ@xxxxxxxxxxxxxx/
the question is if adding address like this is acceptable.
But it must be specified.
Driver will follow based on final dt-binding.
$ref: usb-device.yaml# should be also added but have no idea how to wire it
up to be applied only on usb node not i2c one.
---
.../bindings/usb/microchip,usb5744.yaml | 110 ++++++++++++++++++
1 file changed, 110 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/microchip,usb5744.yaml
diff --git a/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml b/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml
new file mode 100644
index 000000000000..7e0a3472ea95
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml
@@ -0,0 +1,110 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/microchip,usb5744.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip USB5744 4-port Hub Controller
+
+description:
+ Microchip's USB5744 SmartHubTM IC is a 4 port, SuperSpeed (SS)/Hi-Speed (HS),
+ low power, low pin count configurable and fully compliant with the USB 3.1
+ Gen 1 specification. The USB5744 also supports Full Speed (FS) and Low Speed
+ (LS) USB signaling, offering complete coverage of all defined USB operating
+ speeds. The new SuperSpeed hubs operate in parallel with the USB 2.0
+ controller, so 5 Gbps SuperSpeed data transfers are not affected by slower
+ USB 2.0 traffic.
+
+maintainers:
+ - Piyush Mehta <piyush.mehta@xxxxxxx>
+ - Michal Simek <michal.simek@xxxxxxx>
+
+select:
+ properties:
+ compatible:
+ contains:
+ const: microchip,usb5744
+ required:
+ - compatible
I don't understand why do you need this select. It basically disables
schema matching for other ones.
I didn't find a way how to have usbXXX,XXXX compatible strings and
microchip,usb5744 compatible in the same file. I am definitely lacking knowledge
how to write it properly that's why any advise is welcome.
Hm, if you just have both of them like you have now, what happens?
make
DT_SCHEMA_FILES=Documentation/devicetree/bindings/usb/microchip,usb5744.yaml
dt_binding_check
DTEX Documentation/devicetree/bindings/usb/microchip,usb5744.example.dts
LINT Documentation/devicetree/bindings
CHKDT Documentation/devicetree/bindings/processed-schema.json
SCHEMA Documentation/devicetree/bindings/processed-schema.json
DTC_CHK Documentation/devicetree/bindings/usb/microchip,usb5744.example.dtb
/home/monstr/data/disk/linux/Documentation/devicetree/bindings/usb/microchip,usb5744.example.dtb:
hub@1: 'i2c-bus', 'peer-hub', 'reset-gpios' do not match any of the regexes:
'pinctrl-[0-9]+'
From schema:
/home/monstr/data/disk/linux/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml
/home/monstr/data/disk/linux/Documentation/devicetree/bindings/usb/microchip,usb5744.example.dtb:
hub@2: 'i2c-bus', 'peer-hub', 'reset-gpios' do not match any of the regexes:
'pinctrl-[0-9]+'
From schema:
/home/monstr/data/disk/linux/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml
And this is even without usb-device.yaml wired.
Thanks,
Michal
