extcon: Palmas Extcon Driver

This is the driver for the USB comparator built into the palmas chip. It
handles the various USB OTG events that can be generated by cable
insertion/removal.

Signed-off-by: Graeme Gregory <gg@slimlogic.co.uk>
Signed-off-by: Moiz Sonasath <m-sonasath@ti.com>
Signed-off-by: Ruchika Kharwar <ruchika@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: George Cherian <george.cherian@ti.com>
[kishon@ti.com: adapted palmas usb driver to use the extcon framework]
Signed-off-by: Sebastien Guiriec <s-guiriec@ti.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 14 insertions, 12 deletions

diff --git a/include/linux/mfd/palmas.h b/include/linux/mfd/palmas.h
index 8f21daf..9b81b2b 100644
--- a/include/linux/mfd/palmas.h
+++ b/include/linux/mfd/palmas.h
@@ -20,6 +20,8 @@
 #include <linux/leds.h>
 #include <linux/regmap.h>
 #include <linux/regulator/driver.h>
+#include <linux/extcon.h>
+#include <linux/usb/phy_companion.h>
 
 #define PALMAS_NUM_CLIENTS		3
 
@@ -37,6 +39,12 @@ struct palmas_gpadc;
 struct palmas_resource;
 struct palmas_usb;
 
+enum palmas_usb_state {
+	PALMAS_USB_STATE_DISCONNECT,
+	PALMAS_USB_STATE_VBUS,
+	PALMAS_USB_STATE_ID,
+};
+
 struct palmas {
 	struct device *dev;
 
@@ -180,9 +188,6 @@ struct palmas_pmic_platform_data {
 };
 
 struct palmas_usb_platform_data {
-	/* Set this if platform wishes its own vbus control */
-	int no_control_vbus;
-
 	/* Do we enable the wakeup comparator on probe */
 	int wakeup;
 };
@@ -350,22 +355,19 @@ struct palmas_usb {
 	struct palmas *palmas;
 	struct device *dev;
 
-	/* for vbus reporting with irqs disabled */
-	spinlock_t lock;
-
-	struct regulator *vbus_reg;
+	struct extcon_dev edev;
 
 	/* used to set vbus, in atomic path */
 	struct work_struct set_vbus_work;
 
-	int irq1;
-	int irq2;
-	int irq3;
-	int irq4;
+	int id_otg_irq;
+	int id_irq;
+	int vbus_otg_irq;
+	int vbus_irq;
 
 	int vbus_enable;
 
-	u8 linkstat;
+	enum palmas_usb_state linkstat;
 };
 
 #define comparator_to_palmas(x) container_of((x), struct palmas_usb, comparator)