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drivers: mmi_muc_uart: Add Phone Power Supply

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Update to trigger usb driver on attach. This will add
a new "phone" power supply so that the usb driver or
any other driver can register against the "phone"
power supply and get notified when it changes state.

POWER_SUPPLY_PROP_PRESENT will be used to communicate
the attach status.

Change-Id: I150740f1be0ddc9ba44c6bc036f87796686ee9c5
Reviewed-on: https://gerrit.mot.com/1210669
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Ryan Lattrel <[email protected]>
Reviewed-by: Kenneth Kessler <[email protected]>
Submit-Approved: Jira Key
This commit is contained in:
Curtis Porter 2018-07-17 09:36:02 -05:00 • committed by Kenneth Kessler
commit 2461976329
1 changed files with 47 additions and 0 deletions
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47
drivers/mmi_muc_uart/muc_uart.c
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@ -72,6 +72,8 @@ struct mod_muc_data_t {
struct delayed_work idle_work;
struct delayed_work attach_work;
struct delayed_work write_work;
struct power_supply *phone_psy;
};
/* How long until we move on without an ack */
@ -187,6 +189,10 @@ static void muc_uart_attach_work(struct work_struct *w)
if (mm_data) {
gpio_state = gpio_get_value(mm_data->mod_attached_gpio);
if (atomic_read(&mm_data->mod_attached) == gpio_state)
return;
atomic_set(&mm_data->mod_attached, gpio_state);
env = kzalloc(sizeof(*env), GFP_KERNEL);
@ -202,6 +208,9 @@ static void muc_uart_attach_work(struct work_struct *w)
KOBJ_CHANGE,
env->envp);
kfree(env);
/* also make sure to notify the drivers of the attach/detach */
power_supply_changed(mm_data->phone_psy);
}
}
@ -807,16 +816,46 @@ f_end:
return error;
}
static enum power_supply_property muc_uart_ps_props[] = {
POWER_SUPPLY_PROP_PRESENT,
};
static int muc_uart_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct mod_muc_data_t *mm_data = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
val->intval = atomic_read(&mm_data->mod_attached);
break;
default:
return -EINVAL;
}
return 0;
}
static const struct power_supply_desc phone_psy_desc = {
.name = "phone",
.type = POWER_SUPPLY_TYPE_USB,
.get_property = muc_uart_get_property,
.properties = muc_uart_ps_props,
.num_properties = ARRAY_SIZE(muc_uart_ps_props),
};
static int muc_uart_probe(struct platform_device *pdev)
{
struct device_node *np = (&pdev->dev)->of_node;
struct mod_muc_data_t *mm_data;
struct power_supply_config psy_cfg = {};
mm_data = devm_kzalloc(&pdev->dev, sizeof(*mm_data), GFP_KERNEL);
if (!mm_data)
return -ENOMEM;
mm_data->pdev = pdev;
platform_set_drvdata(pdev, mm_data);
psy_cfg.drv_data = mm_data;
pr_info("muc_uart_probe: probe start\n");
@ -900,6 +939,14 @@ static int muc_uart_probe(struct platform_device *pdev)
pdev))
goto err3;
mm_data->phone_psy = devm_power_supply_register(&pdev->dev,
&phone_psy_desc,
&psy_cfg);
if (IS_ERR(mm_data->phone_psy)) {
dev_err(&pdev->dev, "failed: phone power supply register\n");
goto err3;
}
kobject_uevent(&pdev->dev.kobj, KOBJ_ADD);
schedule_delayed_work(&mm_data->attach_work, msecs_to_jiffies(0));