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phy-sun4i-usb: Add workaround for missing Vbus det interrupts on A31

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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>
This commit is contained in:
Hans de Goede 2016-06-29 20:14:10 +02:00 committed by Kishon Vijay Abraham I
parent 956bc8696e
commit 91d96f06a7
1 changed files with 24 additions and 10 deletions
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34
drivers/phy/phy-sun4i-usb.c
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@ -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,