aboutsummaryrefslogtreecommitdiff
path: root/drivers/extcon
diff options
context:
space:
mode:
authorChanwoo Choi2016-12-26 20:37:38 +0900
committerChanwoo Choi2017-01-09 10:04:11 +0900
commite6cf046543763878614d51e8283abd40d5e5327e (patch)
treecce169528406f448b03d82c2d6ee036b1ef03bca /drivers/extcon
parent6e3a7e89ff1a13d6e09f63ce9eff4ad3fad7b544 (diff)
extcon: Move defintion of struct extcon_dev to driver/extcon directory
This patch moves the 'struct extcon_dev' of extcon subsystem to driver/extcon/extcon.h header file because the struct extcon_dev have to be handled by extcon API to guarantee the consistency of strcut extcon_dev. If external drivers are able to touch the struct extcon_dev directly, it might cause the critical and unknown problem. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/extcon')
-rw-r--r--drivers/extcon/devres.c2
-rw-r--r--drivers/extcon/extcon.c3
-rw-r--r--drivers/extcon/extcon.h62
3 files changed, 65 insertions, 2 deletions
diff --git a/drivers/extcon/devres.c b/drivers/extcon/devres.c
index e686acd1c459..b40eb1805927 100644
--- a/drivers/extcon/devres.c
+++ b/drivers/extcon/devres.c
@@ -14,7 +14,7 @@
* GNU General Public License for more details.
*/
-#include <linux/extcon.h>
+#include "extcon.h"
static int devm_extcon_dev_match(struct device *dev, void *res, void *data)
{
diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index d0e367959c91..591582b0d2b7 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -30,11 +30,12 @@
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/err.h>
-#include <linux/extcon.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
+#include "extcon.h"
+
#define SUPPORTED_CABLE_MAX 32
#define CABLE_NAME_MAX 30
diff --git a/drivers/extcon/extcon.h b/drivers/extcon/extcon.h
new file mode 100644
index 000000000000..993ddccafe11
--- /dev/null
+++ b/drivers/extcon/extcon.h
@@ -0,0 +1,62 @@
+#ifndef __LINUX_EXTCON_INTERNAL_H__
+#define __LINUX_EXTCON_INTERNAL_H__
+
+#include <linux/extcon.h>
+
+/**
+ * struct extcon_dev - An extcon device represents one external connector.
+ * @name: The name of this extcon device. Parent device name is
+ * used if NULL.
+ * @supported_cable: Array of supported cable names ending with EXTCON_NONE.
+ * If supported_cable is NULL, cable name related APIs
+ * are disabled.
+ * @mutually_exclusive: Array of mutually exclusive set of cables that cannot
+ * be attached simultaneously. The array should be
+ * ending with NULL or be NULL (no mutually exclusive
+ * cables). For example, if it is { 0x7, 0x30, 0}, then,
+ * {0, 1}, {0, 1, 2}, {0, 2}, {1, 2}, or {4, 5} cannot
+ * be attached simulataneously. {0x7, 0} is equivalent to
+ * {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
+ * can be no simultaneous connections.
+ * @dev: Device of this extcon.
+ * @state: Attach/detach state of this extcon. Do not provide at
+ * register-time.
+ * @nh: Notifier for the state change events from this extcon
+ * @entry: To support list of extcon devices so that users can
+ * search for extcon devices based on the extcon name.
+ * @lock:
+ * @max_supported: Internal value to store the number of cables.
+ * @extcon_dev_type: Device_type struct to provide attribute_groups
+ * customized for each extcon device.
+ * @cables: Sysfs subdirectories. Each represents one cable.
+ *
+ * In most cases, users only need to provide "User initializing data" of
+ * this struct when registering an extcon. In some exceptional cases,
+ * optional callbacks may be needed. However, the values in "internal data"
+ * are overwritten by register function.
+ */
+struct extcon_dev {
+ /* Optional user initializing data */
+ const char *name;
+ const unsigned int *supported_cable;
+ const u32 *mutually_exclusive;
+
+ /* Internal data. Please do not set. */
+ struct device dev;
+ struct raw_notifier_head *nh;
+ struct list_head entry;
+ int max_supported;
+ spinlock_t lock; /* could be called by irq handler */
+ u32 state;
+
+ /* /sys/class/extcon/.../cable.n/... */
+ struct device_type extcon_dev_type;
+ struct extcon_cable *cables;
+
+ /* /sys/class/extcon/.../mutually_exclusive/... */
+ struct attribute_group attr_g_muex;
+ struct attribute **attrs_muex;
+ struct device_attribute *d_attrs_muex;
+};
+
+#endif /* __LINUX_EXTCON_INTERNAL_H__ */