From: Pin-Yen Lin treapking@chromium.org
Parse the "switches" node, if available, and count and store the number of Type-C switches within it. The extcon registration is still supported, but we don't expect both extcon and typec-switch be registered at the same time.
This patch sets a foundation for the actual registering of Type-C switches with the Type-C connector class framework.
Signed-off-by: Pin-Yen Lin treapking@chromium.org Signed-off-by: Prashant Malani pmalani@chromium.org ---
v5 is the first version for this patch.
drivers/gpu/drm/bridge/ite-it6505.c | 34 +++++++++++++++++++++++++---- 1 file changed, 30 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c index 4b673c4792d7..b259f9f367f6 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -452,6 +452,7 @@ struct it6505 { struct delayed_work delayed_audio; struct it6505_audio_data audio; struct dentry *debugfs; + int num_typec_switches;
/* it6505 driver hold option */ bool enable_drv_hold; @@ -3229,13 +3230,28 @@ static void it6505_shutdown(struct i2c_client *client) it6505_lane_off(it6505); }
+static int it6505_register_typec_switches(struct device *device, struct it6505 *it6505) +{ + struct device_node *of; + + of = of_get_child_by_name(device->of_node, "switches"); + if (!of) + return -ENODEV; + + it6505->num_typec_switches = of_get_child_count(of); + if (it6505->num_typec_switches <= 0) + return -ENODEV; + + return 0; +} + static int it6505_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct it6505 *it6505; struct device *dev = &client->dev; struct extcon_dev *extcon; - int err, intp_irq; + int err, intp_irq, ret;
it6505 = devm_kzalloc(&client->dev, sizeof(*it6505), GFP_KERNEL); if (!it6505) @@ -3255,11 +3271,21 @@ static int it6505_i2c_probe(struct i2c_client *client, if (PTR_ERR(extcon) == -EPROBE_DEFER) return -EPROBE_DEFER; if (IS_ERR(extcon)) { - dev_err(dev, "can not get extcon device!"); - return PTR_ERR(extcon); + if (PTR_ERR(extcon) != -ENODEV) + dev_warn(dev, "Cannot get extcon device: %ld", PTR_ERR(extcon)); + it6505->extcon = NULL; + } else { + it6505->extcon = extcon; }
- it6505->extcon = extcon; + ret = it6505_register_typec_switches(dev, it6505); + if (ret) { + dev_dbg(dev, "Didn't register Type C switches, err: %d", ret); + if (!it6505->extcon) { + dev_err(dev, "Both extcon and typec-switch are not registered."); + return -EINVAL; + } + }
it6505->regmap = devm_regmap_init_i2c(client, &it6505_regmap_config); if (IS_ERR(it6505->regmap)) {