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extcon: intel-cht-wc: Add support for registering a power_supply class-device

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The bq25890 used on the Yogabook YB1-X90 / -X91 models relies on
the extcon-driver's BC-1.2 charger detection, and the bq25890 driver
expect this info to be  available through a parent power_supply
class-device which models the detected charger (idem to how the Type-C
TCPM code registers a power_supply classdev for the connected charger).

Add support for registering the power_supply class-device expected
by this setup.

Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Hans de Goede 2022-02-01 14:07:05 +01:00 committed by Sebastian Reichel
parent 73b5ae3415
commit 66e31186cd
1 changed files with 81 additions and 0 deletions
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81
drivers/extcon/extcon-intel-cht-wc.c
View file

@ -14,6 +14,7 @@
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
@ -106,6 +107,8 @@ struct cht_wc_extcon_data {
struct extcon_dev *edev;
struct usb_role_switch *role_sw;
struct regulator *vbus_boost;
struct power_supply *psy;
enum power_supply_usb_type usb_type;
unsigned int previous_cable;
bool usb_host;
bool vbus_boost_enabled;
@ -170,18 +173,23 @@ static int cht_wc_extcon_get_charger(struct cht_wc_extcon_data *ext,
dev_warn(ext->dev,
"Unhandled charger type %d, defaulting to SDP\n",
ret);
ext->usb_type = POWER_SUPPLY_USB_TYPE_SDP;
return EXTCON_CHG_USB_SDP;
case CHT_WC_USBSRC_TYPE_SDP:
case CHT_WC_USBSRC_TYPE_FLOATING:
case CHT_WC_USBSRC_TYPE_OTHER:
ext->usb_type = POWER_SUPPLY_USB_TYPE_SDP;
return EXTCON_CHG_USB_SDP;
case CHT_WC_USBSRC_TYPE_CDP:
ext->usb_type = POWER_SUPPLY_USB_TYPE_CDP;
return EXTCON_CHG_USB_CDP;
case CHT_WC_USBSRC_TYPE_DCP:
case CHT_WC_USBSRC_TYPE_DCP_EXTPHY:
case CHT_WC_USBSRC_TYPE_MHL: /* MHL2+ delivers upto 2A, treat as DCP */
ext->usb_type = POWER_SUPPLY_USB_TYPE_DCP;
return EXTCON_CHG_USB_DCP;
case CHT_WC_USBSRC_TYPE_ACA:
ext->usb_type = POWER_SUPPLY_USB_TYPE_ACA;
return EXTCON_CHG_USB_ACA;
}
}
@ -266,6 +274,8 @@ static void cht_wc_extcon_pwrsrc_event(struct cht_wc_extcon_data *ext)
bool ignore_get_charger_errors = ext->usb_host;
enum usb_role role;
ext->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
ret = regmap_read(ext->regmap, CHT_WC_PWRSRC_STS, &pwrsrc_sts);
if (ret) {
dev_err(ext->dev, "Error reading pwrsrc status: %d\n", ret);
@ -320,6 +330,9 @@ static void cht_wc_extcon_pwrsrc_event(struct cht_wc_extcon_data *ext)
ret = usb_role_switch_set_role(ext->role_sw, role);
if (ret)
dev_err(ext->dev, "Error setting USB-role: %d\n", ret);
if (ext->psy)
power_supply_changed(ext->psy);
}
static irqreturn_t cht_wc_extcon_isr(int irq, void *data)
@ -420,6 +433,59 @@ static int cht_wc_extcon_get_role_sw_and_regulator(struct cht_wc_extcon_data *ex
return 0;
}
static int cht_wc_extcon_psy_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct cht_wc_extcon_data *ext = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_USB_TYPE:
val->intval = ext->usb_type;
break;
case POWER_SUPPLY_PROP_ONLINE:
val->intval = ext->usb_type ? 1 : 0;
break;
default:
return -EINVAL;
}
return 0;
}
static const enum power_supply_usb_type cht_wc_extcon_psy_usb_types[] = {
POWER_SUPPLY_USB_TYPE_SDP,
POWER_SUPPLY_USB_TYPE_CDP,
POWER_SUPPLY_USB_TYPE_DCP,
POWER_SUPPLY_USB_TYPE_ACA,
POWER_SUPPLY_USB_TYPE_UNKNOWN,
};
static const enum power_supply_property cht_wc_extcon_psy_props[] = {
POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_ONLINE,
};
static const struct power_supply_desc cht_wc_extcon_psy_desc = {
.name = "cht_wcove_pwrsrc",
.type = POWER_SUPPLY_TYPE_USB,
.usb_types = cht_wc_extcon_psy_usb_types,
.num_usb_types = ARRAY_SIZE(cht_wc_extcon_psy_usb_types),
.properties = cht_wc_extcon_psy_props,
.num_properties = ARRAY_SIZE(cht_wc_extcon_psy_props),
.get_property = cht_wc_extcon_psy_get_prop,
};
static int cht_wc_extcon_register_psy(struct cht_wc_extcon_data *ext)
{
struct power_supply_config psy_cfg = { .drv_data = ext };
ext->psy = devm_power_supply_register(ext->dev,
&cht_wc_extcon_psy_desc,
&psy_cfg);
return PTR_ERR_OR_ZERO(ext->psy);
}
static int cht_wc_extcon_probe(struct platform_device *pdev)
{
struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
@ -463,6 +529,21 @@ static int cht_wc_extcon_probe(struct platform_device *pdev)
cht_wc_extcon_set_5v_boost(ext, false);
break;
case INTEL_CHT_WC_LENOVO_YOGABOOK1:
/* Do this first, as it may very well return -EPROBE_DEFER. */
ret = cht_wc_extcon_get_role_sw_and_regulator(ext);
if (ret)
return ret;
/*
* The bq25890 used here relies on this driver's BC-1.2 charger
* detection, and the bq25890 driver expect this info to be
* available through a parent power_supply class device which
* models the detected charger (idem to how the Type-C TCPM code
* registers a power_supply classdev for the connected charger).
*/
ret = cht_wc_extcon_register_psy(ext);
if (ret)
return ret;
break;
case INTEL_CHT_WC_XIAOMI_MIPAD2:
ret = cht_wc_extcon_get_role_sw_and_regulator(ext);
if (ret)