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soc: qcom: altmode-glink: add SSR support

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Add subsystem restart (SSR) support to altmode glink driver so
that when subsystem goes down and comes up again, it can send
PAN_EN to charger firmware to receive notifications about altmode
interface.

Change-Id: Ie011d5110b6c26790fe1dd6149115019f8bc261c
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
This commit is contained in:
Subbaraman Narayanamurthy 2020-03-24 18:41:51 -07:00 committed by Anjelique Melendez
parent 46cbba2946
commit 44c3a6cfe8
1 changed files with 34 additions and 7 deletions
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41
drivers/soc/qcom/altmode-glink.c
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@ -381,6 +381,28 @@ static int altmode_send_ack(struct altmode_dev *amdev, u8 port_index)
return rc;
}
static void altmode_state_cb(void *priv, enum pmic_glink_state state)
{
struct altmode_dev *amdev = priv;
pr_debug("state: %d\n", state);
switch (state) {
case PMIC_GLINK_STATE_DOWN:
/* As of now, nothing to do */
break;
case PMIC_GLINK_STATE_UP:
mutex_lock(&amdev->client_lock);
if (!list_empty(&amdev->client_list))
schedule_delayed_work(&amdev->send_pan_en_work,
msecs_to_jiffies(20));
mutex_unlock(&amdev->client_lock);
break;
default:
return;
}
}
#define USBC_NOTIFY_IND_MASK GENMASK(7, 0)
#define GET_OP(opcode) (opcode & USBC_NOTIFY_IND_MASK)
#define GET_SVID(opcode) (opcode >> 16)
@ -495,10 +517,17 @@ static int altmode_probe(struct platform_device *pdev)
RAW_INIT_NOTIFIER_HEAD(&amdev->probe_notifier);
mutex_init(&amdev->client_lock);
idr_init(&amdev->client_idr);
INIT_DELAYED_WORK(&amdev->send_pan_en_work, altmode_send_pan_en);
INIT_LIST_HEAD(&amdev->d_node);
INIT_LIST_HEAD(&amdev->client_list);
pgclient_data.id = MSG_OWNER_USBC_PAN;
pgclient_data.name = "altmode";
pgclient_data.msg_cb = altmode_callback;
pgclient_data.priv = amdev;
pgclient_data.state_cb = altmode_state_cb;
amdev->pgclient = pmic_glink_register_client(amdev->dev,
&pgclient_data);
@ -507,21 +536,19 @@ static int altmode_probe(struct platform_device *pdev)
if (rc != -EPROBE_DEFER)
dev_err(dev, "Error in pmic_glink registration: %d\n",
rc);
return rc;
goto error_register;
}
platform_set_drvdata(pdev, amdev);
mutex_init(&amdev->client_lock);
idr_init(&amdev->client_idr);
INIT_DELAYED_WORK(&amdev->send_pan_en_work, altmode_send_pan_en);
INIT_LIST_HEAD(&amdev->d_node);
INIT_LIST_HEAD(&amdev->client_list);
altmode_device_add(amdev);
altmode_notify_clients(amdev, pdev);
return 0;
error_register:
idr_destroy(&amdev->client_idr);
return rc;
}
static void altmode_device_remove(struct altmode_dev *amdev)