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Date: Tue, 11 Aug 2015 21:27:03 +0530
From: Kishon Vijay Abraham I <kishon@...com>
To: <gregkh@...uxfoundation.org>
CC: <kishon@...com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 04/19] phy-sun4i-usb: Add extcon support for the otg phy (phy0)
From: Hans de Goede <hdegoede@...hat.com>
The sunxi musb glue needs to know if a host or normal usb cable is plugged
in, add extcon support so that the musb glue can monitor the host status.
Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Acked-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
drivers/phy/Kconfig | 1 +
drivers/phy/phy-sun4i-usb.c | 32 +++++++++++++++++++++++++++++++-
2 files changed, 32 insertions(+), 1 deletion(-)
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index e2f2a4d..c0c1ad2 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -208,6 +208,7 @@ config PHY_SUN4I_USB
tristate "Allwinner sunxi SoC USB PHY driver"
depends on ARCH_SUNXI && HAS_IOMEM && OF
depends on RESET_CONTROLLER
+ depends on EXTCON
select GENERIC_PHY
help
Enable this to support the transceiver that is part of Allwinner
diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c
index 37f52f7..a6ea2e6 100644
--- a/drivers/phy/phy-sun4i-usb.c
+++ b/drivers/phy/phy-sun4i-usb.c
@@ -23,6 +23,7 @@
#include <linux/clk.h>
#include <linux/err.h>
+#include <linux/extcon.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
@@ -99,6 +100,7 @@ struct sun4i_usb_phy_data {
int index;
} phys[MAX_PHYS];
/* phy0 / otg related variables */
+ struct extcon_dev *extcon;
bool phy0_init;
bool phy0_poll;
struct gpio_desc *id_det_gpio;
@@ -343,7 +345,7 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
struct sun4i_usb_phy_data *data =
container_of(work, struct sun4i_usb_phy_data, detect.work);
struct phy *phy0 = data->phys[0].phy;
- int id_det, vbus_det;
+ int id_det, vbus_det, id_notify = 0, vbus_notify = 0;
id_det = gpiod_get_value_cansleep(data->id_det_gpio);
vbus_det = gpiod_get_value_cansleep(data->vbus_det_gpio);
@@ -358,15 +360,24 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
if (id_det != data->id_det) {
sun4i_usb_phy0_set_id_detect(phy0, id_det);
data->id_det = id_det;
+ id_notify = 1;
}
if (vbus_det != data->vbus_det) {
sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det);
data->vbus_det = vbus_det;
+ vbus_notify = 1;
}
mutex_unlock(&phy0->mutex);
+ if (id_notify)
+ extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST,
+ !id_det);
+
+ if (vbus_notify)
+ extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det);
+
if (data->phy0_poll)
queue_delayed_work(system_wq, &data->detect, POLL_TIME);
}
@@ -407,6 +418,12 @@ static int sun4i_usb_phy_remove(struct platform_device *pdev)
return 0;
}
+static const unsigned int sun4i_usb_phy0_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_NONE,
+};
+
static int sun4i_usb_phy_probe(struct platform_device *pdev)
{
struct sun4i_usb_phy_data *data;
@@ -466,6 +483,19 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
return -ENODEV;
}
+ if (data->id_det_gpio) {
+ data->extcon = devm_extcon_dev_allocate(dev,
+ sun4i_usb_phy0_cable);
+ if (IS_ERR(data->extcon))
+ return PTR_ERR(data->extcon);
+
+ ret = devm_extcon_dev_register(dev, data->extcon);
+ if (ret) {
+ dev_err(dev, "failed to register extcon: %d\n", ret);
+ return ret;
+ }
+ }
+
for (i = 0; i < data->num_phys; i++) {
struct sun4i_usb_phy *phy = data->phys + i;
char name[16];
--
1.7.9.5
--
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