Re: [PATCH v2 5/7] drm/bridge: anx7625: Register number of Type C switches

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Il 09/06/22 20:09, Prashant Malani ha scritto:
Parse the "switches" node, if available, and count and store the number
of Type-C switches within it. Since we currently don't do anything with
this info, no functional changes are expected from this change.

This patch sets a foundation for the actual registering of Type-C
switches with the Type-C connector class framework.

Signed-off-by: Prashant Malani <pmalani@xxxxxxxxxxxx>
---

Changes since v1:
- No changes.

  drivers/gpu/drm/bridge/analogix/anx7625.c | 20 ++++++++++++++++++++
  drivers/gpu/drm/bridge/analogix/anx7625.h |  1 +
  2 files changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 53a5da6c49dd..07ed44c6b839 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -2581,6 +2581,22 @@ static void anx7625_runtime_disable(void *data)
  	pm_runtime_disable(data);
  }
+static int anx7625_register_typec_switches(struct device *device, struct anx7625_data *ctx)
+{
+	struct device_node *of = NULL;
+	int ret = 0;
+
+	of = of_get_child_by_name(device->of_node, "switches");
+	if (!of)
+		return -ENODEV;
+
+	ctx->num_typec_switches = of_get_child_count(of);
+	if (ctx->num_typec_switches <= 0)
+		return -ENODEV;
+
+	return ret;

You aren't using the `ret` variable for anything other than returning zero:
remove it and simply return 0 here.

+}
+
  static int anx7625_i2c_probe(struct i2c_client *client,
  			     const struct i2c_device_id *id)
  {
@@ -2686,6 +2702,10 @@ static int anx7625_i2c_probe(struct i2c_client *client,
  	if (platform->pdata.intp_irq)
  		queue_work(platform->workqueue, &platform->work);
+ ret = anx7625_register_typec_switches(dev, platform);
+	if (ret)
+		dev_info(dev, "Didn't register Type C switches, err: %d\n", ret);

Type-C switches are optional for this driver and this will print a sort of error
on boards that are *not* declaring any switches on purpose (because perhaps they
don't have any, or for any other reason).

Even though this is a dev_info and not a dev_err, it's still printing an alarming
(and useless, in the aforementioned case) message.

Please fix this.

Regards,
Angelo




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