diff mbox series

[3/5] usb: typec: hd3ss3220: Use OF graph API to get the connector fwnode

Message ID 20200804174828.8339-4-biju.das.jz@bp.renesas.com (mailing list archive)
State New, archived
Headers show
Series Remodel HD3SS3220 device nodes | expand

Commit Message

Biju Das Aug. 4, 2020, 5:48 p.m. UTC 
Some platforms have only super speed data bus connected to this device
and high speed data bus directly connected to the SoC. In such platforms
modelling connector as a child of this device is making it non complaint
with usb connector bindings. By modelling connector node as standalone
device node along with this device and the SoC data bus will make it
complaint with usb connector bindings.
Update the driver to handle this model by using OF graph API to get the
connector fwnode and usb role switch class API to get role switch handle.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
Ref:https://patchwork.kernel.org/patch/11669423/
---
 drivers/usb/typec/hd3ss3220.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

Comments

Sergey Shtylyov Aug. 5, 2020, 9:35 a.m. UTC | #1 
Hello!

On 04.08.2020 20:48, Biju Das wrote:

> Some platforms have only super speed data bus connected to this device
> and high speed data bus directly connected to the SoC. In such platforms
> modelling connector as a child of this device is making it non complaint

    Compliant? Complaint is when you complain. :-)

> with usb connector bindings. By modelling connector node as standalone
> device node along with this device and the SoC data bus will make it
> complaint with usb connector bindings.

    Ditto.

> Update the driver to handle this model by using OF graph API to get the
> connector fwnode and usb role switch class API to get role switch handle.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
> Ref:https://patchwork.kernel.org/patch/11669423/
[...]

MBR, Sergei
Biju Das Aug. 5, 2020, 10:16 a.m. UTC | #2 
Hi Sergei,

Thanks for the feedback.

> Subject: Re: [PATCH 3/5] usb: typec: hd3ss3220: Use OF graph API to get the
> connector fwnode
>
> Hello!
>
> On 04.08.2020 20:48, Biju Das wrote:
>
> > Some platforms have only super speed data bus connected to this device
> > and high speed data bus directly connected to the SoC. In such
> > platforms modelling connector as a child of this device is making it
> > non complaint
>
>     Compliant? Complaint is when you complain. :-)

Will fix this.

> > with usb connector bindings. By modelling connector node as standalone
> > device node along with this device and the SoC data bus will make it
> > complaint with usb connector bindings.
>
>     Ditto.

Yep, Will fix this.

Regards,
Biju


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diff mbox series

Patch

diff --git a/drivers/usb/typec/hd3ss3220.c b/drivers/usb/typec/hd3ss3220.c
index 323dfa8160ab..f633ec15b1a1 100644
--- a/drivers/usb/typec/hd3ss3220.c
+++ b/drivers/usb/typec/hd3ss3220.c
@@ -155,7 +155,7 @@  static int hd3ss3220_probe(struct i2c_client *client,
 {
 	struct typec_capability typec_cap = { };
 	struct hd3ss3220 *hd3ss3220;
-	struct fwnode_handle *connector;
+	struct fwnode_handle *connector, *ep;
 	int ret;
 	unsigned int data;
 
@@ -173,11 +173,21 @@  static int hd3ss3220_probe(struct i2c_client *client,
 
 	hd3ss3220_set_source_pref(hd3ss3220,
 				  HD3SS3220_REG_GEN_CTRL_SRC_PREF_DRP_DEFAULT);
+	/* For backward compatibility check the connector child node first */
 	connector = device_get_named_child_node(hd3ss3220->dev, "connector");
-	if (!connector)
-		return -ENODEV;
+	if (connector) {
+		hd3ss3220->role_sw = fwnode_usb_role_switch_get(connector);
+	} else {
+		ep = fwnode_graph_get_next_endpoint(dev_fwnode(hd3ss3220->dev), NULL);
+		if (!ep)
+			return -ENODEV;
+		connector = fwnode_graph_get_remote_port_parent(ep);
+		fwnode_handle_put(ep);
+		if (!connector)
+			return -ENODEV;
+		hd3ss3220->role_sw = usb_role_switch_get(hd3ss3220->dev);
+	}
 
-	hd3ss3220->role_sw = fwnode_usb_role_switch_get(connector);
 	if (IS_ERR(hd3ss3220->role_sw)) {
 		ret = PTR_ERR(hd3ss3220->role_sw);
 		goto err_put_fwnode;