[PATCH v2 0/2] Add support for Etek ET7304 Controller

[PATCH v2 0/2] Add support for Etek ET7304 Controller

[Yuanshen Cao]

The Etek ET7304 is a USB Type-C Port Controller with USB-PD used on
the Radxa Cubie A7Z.
According to the ET7304 datasheet [1] and the vendor BSP source code
provided by Radxa [2], this controller is functionally identical as
Richtek RT1715, with the only difference being the VID.

Add support for the ET7304 by registering its chip info in the driver.
Tested on Radxa Cubie A7Z.

[1] https://www.etekmicro.com/wp-content/uploads/datasheets/ET7304_datasheet.pdf
[2] https://github.com/radxa/allwinner-bsp/commit/156b6578cc173855b41ea311a229403ccbadb17c

Signed-off-by: Yuanshen Cao <alex.caoys@gmail.com>
---
Changes in v2:
- Put dt-bindings Documentation changes in a separate patch
- Add Etek to the vendor prefixes
- Link to v1: https://lore.kernel.org/r/20260217190010.67-1-alex.caoys@gmail.com/

---
Yuanshen Cao (2):
      dt-bindings: usb: document the Etek ET7304 USB
      usb: typec: tcpm: Add vid and chip info for Etek ET7304

 .../devicetree/bindings/usb/richtek,rt1711h.yaml         |  3 ++-
 Documentation/devicetree/bindings/vendor-prefixes.yaml   |  2 ++
 drivers/usb/typec/tcpm/tcpci_rt1711h.c                   | 16 +++++++++++++++-
 3 files changed, 19 insertions(+), 2 deletions(-)
---
base-commit: 956b9cbd7f156c8672dac94a00de3c6a0939c692
change-id: 20260219-et7304-f37b616cf8f3

Best regards,
-- 
Yuanshen Cao <alex.caoys@gmail.com>

[PATCH v2 1/2] dt-bindings: usb: document the Etek ET7304 USB

[Yuanshen Cao]

Type-C Port Controller

Document the ETEK ET7304 USB Type-C Port Controller with USB-PD.

Signed-off-by: Yuanshen Cao <alex.caoys@gmail.com>
---
 Documentation/devicetree/bindings/usb/richtek,rt1711h.yaml | 3 ++-
 Documentation/devicetree/bindings/vendor-prefixes.yaml     | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/usb/richtek,rt1711h.yaml b/Documentation/devicetree/bindings/usb/richtek,rt1711h.yaml
index ae611f7e57ca..ed0802112eb9 100644
--- a/Documentation/devicetree/bindings/usb/richtek,rt1711h.yaml
+++ b/Documentation/devicetree/bindings/usb/richtek,rt1711h.yaml
@@ -21,8 +21,9 @@ properties:
     enum:
       - richtek,rt1711h
       - richtek,rt1715
+      - etek,et7304
     description:
-      RT1711H support PD20, RT1715 support PD30 except Fast Role Swap.
+      RT1711H support PD20, RT1715 and ET7304 support PD30 except Fast Role Swap.
 
   reg:
     maxItems: 1
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index ee7fd3cfe203..80a5362f1c08 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -541,6 +541,8 @@ patternProperties:
     description: ESTeem Wireless Modems
   "^eswin,.*":
     description: Beijing ESWIN Technology Group Co. Ltd.
+  "^etek,.*":
+    description: Wuxi ETEK Micro-Electronics Co.,Ltd.
   "^ettus,.*":
     description: NI Ettus Research
   "^eukrea,.*":

-- 
2.53.0

Re: [PATCH v2 1/2] dt-bindings: usb: document the Etek ET7304 USB

[Krzysztof Kozlowski]

On Thu, Feb 19, 2026 at 03:02:51AM +0000, Yuanshen Cao wrote:
> Type-C Port Controller
> 
> Document the ETEK ET7304 USB Type-C Port Controller with USB-PD.
> 
> Signed-off-by: Yuanshen Cao <alex.caoys@gmail.com>
> ---
>  Documentation/devicetree/bindings/usb/richtek,rt1711h.yaml | 3 ++-
>  Documentation/devicetree/bindings/vendor-prefixes.yaml     | 2 ++
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/usb/richtek,rt1711h.yaml b/Documentation/devicetree/bindings/usb/richtek,rt1711h.yaml
> index ae611f7e57ca..ed0802112eb9 100644
> --- a/Documentation/devicetree/bindings/usb/richtek,rt1711h.yaml
> +++ b/Documentation/devicetree/bindings/usb/richtek,rt1711h.yaml
> @@ -21,8 +21,9 @@ properties:
>      enum:
>        - richtek,rt1711h
>        - richtek,rt1715
> +      - etek,et7304

e < r

>      description:
> -      RT1711H support PD20, RT1715 support PD30 except Fast Role Swap.
> +      RT1711H support PD20, RT1715 and ET7304 support PD30 except Fast Role Swap.
>  
>    reg:
>      maxItems: 1
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> index ee7fd3cfe203..80a5362f1c08 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> @@ -541,6 +541,8 @@ patternProperties:
>      description: ESTeem Wireless Modems
>    "^eswin,.*":
>      description: Beijing ESWIN Technology Group Co. Ltd.
> +  "^etek,.*":
> +    description: Wuxi ETEK Micro-Electronics Co.,Ltd.

Domain is etekmicro.com, so use etekmicro as prefix.

Best regards,
Krzysztof

[PATCH v2 2/2] usb: typec: tcpm: Add vid and chip info for Etek ET7304

[Yuanshen Cao]

Move the VID to chip info to accommodate different VIDs
Add chip info for Etek ET7304. ET7304 is functionally identical to
the Richtek RT1715, with the only difference being the VID.

Signed-off-by: Yuanshen Cao <alex.caoys@gmail.com>
---
 drivers/usb/typec/tcpm/tcpci_rt1711h.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
index 88c50b984e8a..4848748a10dd 100644
--- a/drivers/usb/typec/tcpm/tcpci_rt1711h.c
+++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
@@ -19,9 +19,11 @@
 #include <linux/regulator/consumer.h>
 
 #define RT1711H_VID		0x29CF
+#define ET7304_VID		0x6DCF
 #define RT1711H_PID		0x1711
 #define RT1711H_DID		0x2171
 #define RT1715_DID		0x2173
+#define ET7304_DID		0x2173
 
 #define RT1711H_PHYCTRL1	0x80
 #define RT1711H_PHYCTRL2	0x81
@@ -55,6 +57,7 @@
 
 struct rt1711h_chip_info {
 	u32 rxdz_sel;
+	u16 vid;
 	u16 did;
 	bool enable_pd30_extended_message;
 };
@@ -308,7 +311,7 @@ static int rt1711h_check_revision(struct i2c_client *i2c, struct rt1711h_chip *c
 	ret = i2c_smbus_read_word_data(i2c, TCPC_VENDOR_ID);
 	if (ret < 0)
 		return ret;
-	if (ret != RT1711H_VID) {
+	if (ret != chip->info->vid) {
 		dev_err(&i2c->dev, "vid is not correct, 0x%04x\n", ret);
 		return -ENODEV;
 	}
@@ -406,18 +409,28 @@ static void rt1711h_remove(struct i2c_client *client)
 }
 
 static const struct rt1711h_chip_info rt1711h = {
+	.vid = RT1711H_VID,
 	.did = RT1711H_DID,
 };
 
 static const struct rt1711h_chip_info rt1715 = {
 	.rxdz_sel = RT1711H_BMCIO_RXDZSEL,
+	.vid = RT1711H_VID,
 	.did = RT1715_DID,
 	.enable_pd30_extended_message = true,
 };
 
+static const struct rt1711h_chip_info et7304 = {
+	.rxdz_sel = RT1711H_BMCIO_RXDZSEL,
+	.vid = ET7304_VID,
+	.did = ET7304_DID,
+	.enable_pd30_extended_message = true,
+};
+
 static const struct i2c_device_id rt1711h_id[] = {
 	{ "rt1711h", (kernel_ulong_t)&rt1711h },
 	{ "rt1715", (kernel_ulong_t)&rt1715 },
+	{ "et7304", (kernel_ulong_t)&et7304 },
 	{}
 };
 MODULE_DEVICE_TABLE(i2c, rt1711h_id);
@@ -425,6 +438,7 @@ MODULE_DEVICE_TABLE(i2c, rt1711h_id);
 static const struct of_device_id rt1711h_of_match[] = {
 	{ .compatible = "richtek,rt1711h", .data = &rt1711h },
 	{ .compatible = "richtek,rt1715", .data = &rt1715 },
+	{ .compatible = "etek,et7304", .data = &et7304 },
 	{}
 };
 MODULE_DEVICE_TABLE(of, rt1711h_of_match);

-- 
2.53.0

Re: [PATCH v2 2/2] usb: typec: tcpm: Add vid and chip info for Etek ET7304

[Krzysztof Kozlowski]

On Thu, Feb 19, 2026 at 03:02:52AM +0000, Yuanshen Cao wrote:

>  static const struct i2c_device_id rt1711h_id[] = {
>  	{ "rt1711h", (kernel_ulong_t)&rt1711h },
>  	{ "rt1715", (kernel_ulong_t)&rt1715 },
> +	{ "et7304", (kernel_ulong_t)&et7304 },

Such tables are sorted by name to avoid conflicts. e < r

Best regards,
Krzysztof