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Subject[PATCH 08/10] phy-sun4i-usb: Add workaround for missing Vbus det interrupts on A31
Date
From: Hans de Goede <hdegoede@redhat.com>

The A31 companion pmic (axp221) does not generate vbus change interrupts
when the board is driving vbus, so we must poll when using the pmic for
vbus-det _and_ we're driving vbus.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/phy/phy-sun4i-usb.c | 34 ++++++++++++++++++++++++----------
1 file changed, 24 insertions(+), 10 deletions(-)

diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c
index de3101f..0a45bc6 100644
--- a/drivers/phy/phy-sun4i-usb.c
+++ b/drivers/phy/phy-sun4i-usb.c
@@ -94,6 +94,7 @@

enum sun4i_usb_phy_type {
sun4i_a10_phy,
+ sun6i_a31_phy,
sun8i_a33_phy,
sun8i_h3_phy,
};
@@ -122,7 +123,6 @@ struct sun4i_usb_phy_data {
/* phy0 / otg related variables */
struct extcon_dev *extcon;
bool phy0_init;
- bool phy0_poll;
struct gpio_desc *id_det_gpio;
struct gpio_desc *vbus_det_gpio;
struct power_supply *vbus_power_supply;
@@ -343,6 +343,24 @@ static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data)
return data->vbus_det_gpio || data->vbus_power_supply;
}

+static bool sun4i_usb_phy0_poll(struct sun4i_usb_phy_data *data)
+{
+ if ((data->id_det_gpio && data->id_det_irq <= 0) ||
+ (data->vbus_det_gpio && data->vbus_det_irq <= 0))
+ return true;
+
+ /*
+ * The A31 companion pmic (axp221) does not generate vbus change
+ * interrupts when the board is driving vbus, so we must poll
+ * when using the pmic for vbus-det _and_ we're driving vbus.
+ */
+ if (data->cfg->type == sun6i_a31_phy &&
+ data->vbus_power_supply && data->phys[0].regulator_on)
+ return true;
+
+ return false;
+}
+
static int sun4i_usb_phy_power_on(struct phy *_phy)
{
struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
@@ -364,7 +382,7 @@ static int sun4i_usb_phy_power_on(struct phy *_phy)
phy->regulator_on = true;

/* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */
- if (phy->index == 0 && data->vbus_det_gpio && data->phy0_poll)
+ if (phy->index == 0 && sun4i_usb_phy0_poll(data))
mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);

return 0;
@@ -385,7 +403,7 @@ static int sun4i_usb_phy_power_off(struct phy *_phy)
* phy0 vbus typically slowly discharges, sometimes this causes the
* Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan.
*/
- if (phy->index == 0 && data->vbus_det_gpio && !data->phy0_poll)
+ if (phy->index == 0 && !sun4i_usb_phy0_poll(data))
mod_delayed_work(system_wq, &data->detect, POLL_TIME);

return 0;
@@ -468,7 +486,7 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
if (vbus_notify)
extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det);

- if (data->phy0_poll)
+ if (sun4i_usb_phy0_poll(data))
queue_delayed_work(system_wq, &data->detect, POLL_TIME);
}

@@ -644,11 +662,6 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
}

data->id_det_irq = gpiod_to_irq(data->id_det_gpio);
- data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio);
- if ((data->id_det_gpio && data->id_det_irq <= 0) ||
- (data->vbus_det_gpio && data->vbus_det_irq <= 0))
- data->phy0_poll = true;
-
if (data->id_det_irq > 0) {
ret = devm_request_irq(dev, data->id_det_irq,
sun4i_usb_phy0_id_vbus_det_irq,
@@ -660,6 +673,7 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
}
}

+ data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio);
if (data->vbus_det_irq > 0) {
ret = devm_request_irq(dev, data->vbus_det_irq,
sun4i_usb_phy0_id_vbus_det_irq,
@@ -711,7 +725,7 @@ static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = {

static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = {
.num_phys = 3,
- .type = sun4i_a10_phy,
+ .type = sun6i_a31_phy,
.disc_thresh = 3,
.phyctl_offset = REG_PHYCTL_A10,
.dedicated_clocks = true,
--
1.7.9.5
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