diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2017-04-05 00:04:52 +0200 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2017-04-06 10:55:26 +0900 |
| commit | c42a880c3139cde603c5c83950ca7613aef7eedc (patch) | |
| tree | eb1f6070b8181ee1aa30915286006b374466840d /drivers/extcon/extcon-intel-cht-wc.c | |
| parent | 585cb239f4de6c11349e900dd8b4d8cf0825e802 (diff) | |
extcon: intel-cht-wc: Ignore failure to detect charger-type on host mode exit
When we leave host-mode because the id-pin is no longer connected to
ground, the 5v boost converter is normally still on, so we will see
Vbus, but it is not from a charger (normally) so the charger-type
detection will fail.
This commit silences the cht_wc_extcon_get_charger() false-positive
errors when we're leaving host mode.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/extcon/extcon-intel-cht-wc.c')
| -rw-r--r-- | drivers/extcon/extcon-intel-cht-wc.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/extcon/extcon-intel-cht-wc.c b/drivers/extcon/extcon-intel-cht-wc.c index e22df5f2bea5..91a0023074af 100644 --- a/drivers/extcon/extcon-intel-cht-wc.c +++ b/drivers/extcon/extcon-intel-cht-wc.c @@ -96,6 +96,7 @@ struct cht_wc_extcon_data { struct regmap *regmap; struct extcon_dev *edev; unsigned int previous_cable; + bool usb_host; }; static int cht_wc_extcon_get_id(struct cht_wc_extcon_data *ext, int pwrsrc_sts) @@ -112,7 +113,8 @@ static int cht_wc_extcon_get_id(struct cht_wc_extcon_data *ext, int pwrsrc_sts) return USB_ID_FLOAT; } -static int cht_wc_extcon_get_charger(struct cht_wc_extcon_data *ext) +static int cht_wc_extcon_get_charger(struct cht_wc_extcon_data *ext, + bool ignore_errors) { int ret, usbsrc, status; unsigned long timeout; @@ -135,6 +137,9 @@ static int cht_wc_extcon_get_charger(struct cht_wc_extcon_data *ext) } while (time_before(jiffies, timeout)); if (status != CHT_WC_USBSRC_STS_SUCCESS) { + if (ignore_errors) + return EXTCON_CHG_USB_SDP; /* Save fallback */ + if (status == CHT_WC_USBSRC_STS_FAIL) dev_warn(ext->dev, "Could not detect charger type\n"); else @@ -203,6 +208,8 @@ static void cht_wc_extcon_pwrsrc_event(struct cht_wc_extcon_data *ext) { int ret, pwrsrc_sts, id; unsigned int cable = EXTCON_NONE; + /* Ignore errors in host mode, as the 5v boost converter is on then */ + bool ignore_get_charger_errors = ext->usb_host; ret = regmap_read(ext->regmap, CHT_WC_PWRSRC_STS, &pwrsrc_sts); if (ret) { @@ -223,7 +230,7 @@ static void cht_wc_extcon_pwrsrc_event(struct cht_wc_extcon_data *ext) goto set_state; } - ret = cht_wc_extcon_get_charger(ext); + ret = cht_wc_extcon_get_charger(ext, ignore_get_charger_errors); if (ret >= 0) cable = ret; @@ -238,8 +245,8 @@ set_state: ext->previous_cable = cable; } - extcon_set_state_sync(ext->edev, EXTCON_USB_HOST, - id == USB_ID_GND || id == USB_RID_A); + ext->usb_host = ((id == USB_ID_GND) || (id == USB_RID_A)); + extcon_set_state_sync(ext->edev, EXTCON_USB_HOST, ext->usb_host); } static irqreturn_t cht_wc_extcon_isr(int irq, void *data) |