Some platforms(for eg: RZ/V2M EVK) does not have interrupt pin
connected to HD3SS3220. Add polling support for role detection.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
v1->v2:
* Dropped patch#3 for soring header files.
---
drivers/usb/typec/hd3ss3220.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/usb/typec/hd3ss3220.c b/drivers/usb/typec/hd3ss3220.c
index c24bbccd14f9..a445c1bd0627 100644
--- a/drivers/usb/typec/hd3ss3220.c
+++ b/drivers/usb/typec/hd3ss3220.c
@@ -14,6 +14,7 @@
#include <linux/slab.h>
#include <linux/usb/typec.h>
#include <linux/delay.h>
+#include <linux/workqueue.h>
#define HD3SS3220_REG_CN_STAT_CTRL 0x09
#define HD3SS3220_REG_GEN_CTRL 0x0A
@@ -37,6 +38,9 @@ struct hd3ss3220 {
struct regmap *regmap;
struct usb_role_switch *role_sw;
struct typec_port *port;
+ struct delayed_work output_poll_work;
+ enum usb_role role_state;
+ bool poll;
};
static int hd3ss3220_set_source_pref(struct hd3ss3220 *hd3ss3220, int src_pref)
@@ -118,6 +122,22 @@ static void hd3ss3220_set_role(struct hd3ss3220 *hd3ss3220)
default:
break;
}
+
+ hd3ss3220->role_state = role_state;
+}
+
+static void output_poll_execute(struct work_struct *work)
+{
+ struct delayed_work *delayed_work = to_delayed_work(work);
+ struct hd3ss3220 *hd3ss3220 = container_of(delayed_work,
+ struct hd3ss3220,
+ output_poll_work);
+ enum usb_role role_state = hd3ss3220_get_attached_state(hd3ss3220);
+
+ if (hd3ss3220->role_state != role_state)
+ hd3ss3220_set_role(hd3ss3220);
+
+ schedule_delayed_work(&hd3ss3220->output_poll_work, HZ);
}
static irqreturn_t hd3ss3220_irq(struct hd3ss3220 *hd3ss3220)
@@ -227,6 +247,9 @@ static int hd3ss3220_probe(struct i2c_client *client,
"hd3ss3220", &client->dev);
if (ret)
goto err_unreg_port;
+ } else {
+ INIT_DELAYED_WORK(&hd3ss3220->output_poll_work, output_poll_execute);
+ hd3ss3220->poll = true;
}
ret = i2c_smbus_read_byte_data(client, HD3SS3220_REG_DEV_REV);
@@ -235,6 +258,9 @@ static int hd3ss3220_probe(struct i2c_client *client,
fwnode_handle_put(connector);
+ if (hd3ss3220->poll)
+ schedule_delayed_work(&hd3ss3220->output_poll_work, HZ);
+
dev_info(&client->dev, "probed revision=0x%x\n", ret);
return 0;
@@ -252,6 +278,9 @@ static void hd3ss3220_remove(struct i2c_client *client)
{
struct hd3ss3220 *hd3ss3220 = i2c_get_clientdata(client);
+ if (hd3ss3220->poll)
+ cancel_delayed_work_sync(&hd3ss3220->output_poll_work);
+
typec_unregister_port(hd3ss3220->port);
usb_role_switch_put(hd3ss3220->role_sw);
}
--
2.25.1
