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authorChanwoo Choi <cw00.choi@samsung.com>2016-07-11 13:30:43 +0300
committerKishon Vijay Abraham I <kishon@ti.com>2016-09-10 14:18:51 +0300
commit067c1652e7a7d50d951eee1d34a414ea931cee6c (patch)
treeb1b87736cf50c5c13962170718dea64a97b3ab0a /include/linux/extcon.h
parent505cf01f984bdcf088c9ec1e96f987f1ff47dc21 (diff)
downloadlinux-067c1652e7a7d50d951eee1d34a414ea931cee6c.tar.xz
extcon: Add the support for extcon property according to extcon type
This patch support the extcon property for the external connector because each external connector might have the property according to the H/W design and the specific characteristics. - EXTCON_PROP_USB_[property name] - EXTCON_PROP_CHG_[property name] - EXTCON_PROP_JACK_[property name] - EXTCON_PROP_DISP_[property name] Add the new extcon APIs to get/set the property value as following: - int extcon_get_property(struct extcon_dev *edev, unsigned int id, unsigned int prop, union extcon_property_value *prop_val) - int extcon_set_property(struct extcon_dev *edev, unsigned int id, unsigned int prop, union extcon_property_value prop_val) Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Tested-by: Chris Zhong <zyw@rock-chips.com> Tested-by: Guenter Roeck <groeck@chromium.org> Reviewed-by: Guenter Roeck <groeck@chromium.org>
Diffstat (limited to 'include/linux/extcon.h')
-rw-r--r--include/linux/extcon.h81
1 files changed, 81 insertions, 0 deletions
diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 46d802892c82..f9d4a44e86d3 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -77,6 +77,63 @@
#define EXTCON_NUM 63
+/*
+ * Define the property of supported external connectors.
+ *
+ * When adding the new extcon property, they *must* have
+ * the type/value/default information. Also, you *have to*
+ * modify the EXTCON_PROP_[type]_START/END definitions
+ * which mean the range of the supported properties
+ * for each extcon type.
+ *
+ * The naming style of property
+ * : EXTCON_PROP_[type]_[property name]
+ *
+ * EXTCON_PROP_USB_[property name] : USB property
+ * EXTCON_PROP_CHG_[property name] : Charger property
+ * EXTCON_PROP_JACK_[property name] : Jack property
+ * EXTCON_PROP_DISP_[property name] : Display property
+ */
+
+/*
+ * Properties of EXTCON_TYPE_USB.
+ *
+ * - EXTCON_PROP_USB_VBUS
+ * @type: integer (intval)
+ * @value: 0 (low) or 1 (high)
+ * @default: 0 (low)
+ */
+#define EXTCON_PROP_USB_VBUS 0
+
+#define EXTCON_PROP_USB_MIN 0
+#define EXTCON_PROP_USB_MAX 0
+#define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
+
+/* Properties of EXTCON_TYPE_CHG. */
+#define EXTCON_PROP_CHG_MIN 50
+#define EXTCON_PROP_CHG_MAX 50
+#define EXTCON_PROP_CHG_CNT (EXTCON_PROP_CHG_MAX - EXTCON_PROP_CHG_MIN + 1)
+
+/* Properties of EXTCON_TYPE_JACK. */
+#define EXTCON_PROP_JACK_MIN 100
+#define EXTCON_PROP_JACK_MAX 100
+#define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1)
+
+/* Properties of EXTCON_TYPE_DISP. */
+#define EXTCON_PROP_DISP_MIN 150
+#define EXTCON_PROP_DISP_MAX 150
+#define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1)
+
+/*
+ * Define the type of property's value.
+ *
+ * Define the property's value as union type. Because each property
+ * would need the different data type to store it.
+ */
+union extcon_property_value {
+ int intval; /* type : integer (intval) */
+};
+
struct extcon_cable;
/**
@@ -167,6 +224,17 @@ extern int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
bool cable_state);
/*
+ * get/set_property access the property value of each external connector.
+ * They are used to access the property of each cable based on the property id.
+ */
+extern int extcon_get_property(struct extcon_dev *edev, unsigned int id,
+ unsigned int prop,
+ union extcon_property_value *prop_val);
+extern int extcon_set_property(struct extcon_dev *edev, unsigned int id,
+ unsigned int prop,
+ union extcon_property_value prop_val);
+
+/*
* Following APIs are to monitor every action of a notifier.
* Registrar gets notified for every external port of a connection device.
* Probably this could be used to debug an action of notifier; however,
@@ -239,6 +307,19 @@ static inline int extcon_set_cable_state_(struct extcon_dev *edev,
return 0;
}
+static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id,
+ unsigned int prop,
+ union extcon_property_value *prop_val)
+{
+ return 0;
+}
+static inline int extcon_set_property(struct extcon_dev *edev, unsigned int id,
+ unsigned int prop,
+ union extcon_property_value prop_val)
+{
+ return 0;
+}
+
static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
{
return NULL;