#include <linux/module.h>
#include <linux/types.h>
+#include <linux/idr.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/fs.h>
* @attr_name: "name" sysfs entry
* @attr_state: "state" sysfs entry
* @attrs: the array pointing to attr_name and attr_state for attr_g
+ * @usb_propval: the array of USB connector properties
+ * @chg_propval: the array of charger connector properties
+ * @jack_propval: the array of jack connector properties
+ * @disp_propval: the array of display connector properties
+ * @usb_bits: the bit array of the USB connector property capabilities
+ * @chg_bits: the bit array of the charger connector property capabilities
+ * @jack_bits: the bit array of the jack connector property capabilities
+ * @disp_bits: the bit array of the display connector property capabilities
*/
struct extcon_cable {
struct extcon_dev *edev;
union extcon_property_value jack_propval[EXTCON_PROP_JACK_CNT];
union extcon_property_value disp_propval[EXTCON_PROP_DISP_CNT];
- unsigned long usb_bits[BITS_TO_LONGS(EXTCON_PROP_USB_CNT)];
- unsigned long chg_bits[BITS_TO_LONGS(EXTCON_PROP_CHG_CNT)];
- unsigned long jack_bits[BITS_TO_LONGS(EXTCON_PROP_JACK_CNT)];
- unsigned long disp_bits[BITS_TO_LONGS(EXTCON_PROP_DISP_CNT)];
+ DECLARE_BITMAP(usb_bits, EXTCON_PROP_USB_CNT);
+ DECLARE_BITMAP(chg_bits, EXTCON_PROP_CHG_CNT);
+ DECLARE_BITMAP(jack_bits, EXTCON_PROP_JACK_CNT);
+ DECLARE_BITMAP(disp_bits, EXTCON_PROP_DISP_CNT);
};
static struct class *extcon_class;
+static DEFINE_IDA(extcon_dev_ids);
static LIST_HEAD(extcon_dev_list);
static DEFINE_MUTEX(extcon_dev_list_lock);
static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state)
{
- int i = 0;
+ int i;
if (!edev->mutually_exclusive)
return 0;
struct extcon_dev *edev = dev_get_drvdata(dev);
if (edev->max_supported == 0)
- return sprintf(buf, "%u\n", edev->state);
+ return sysfs_emit(buf, "%u\n", edev->state);
for (i = 0; i < edev->max_supported; i++) {
- count += sprintf(buf + count, "%s=%d\n",
- extcon_info[edev->supported_cable[i]].name,
- !!(edev->state & BIT(i)));
+ count += sysfs_emit_at(buf, count, "%s=%d\n",
+ extcon_info[edev->supported_cable[i]].name,
+ !!(edev->state & BIT(i)));
}
return count;
{
struct extcon_dev *edev = dev_get_drvdata(dev);
- return sprintf(buf, "%s\n", edev->name);
+ return sysfs_emit(buf, "%s\n", edev->name);
}
static DEVICE_ATTR_RO(name);
attr_name);
int i = cable->cable_index;
- return sprintf(buf, "%s\n",
- extcon_info[cable->edev->supported_cable[i]].name);
+ return sysfs_emit(buf, "%s\n",
+ extcon_info[cable->edev->supported_cable[i]].name);
}
static ssize_t cable_state_show(struct device *dev,
int i = cable->cable_index;
- return sprintf(buf, "%d\n",
- extcon_get_state(cable->edev, cable->edev->supported_cable[i]));
+ return sysfs_emit(buf, "%d\n",
+ extcon_get_state(cable->edev, cable->edev->supported_cable[i]));
}
/**
static int create_extcon_class(void)
{
- if (!extcon_class) {
- extcon_class = class_create("extcon");
- if (IS_ERR(extcon_class))
- return PTR_ERR(extcon_class);
- extcon_class->dev_groups = extcon_groups;
- }
+ if (extcon_class)
+ return 0;
+
+ extcon_class = class_create("extcon");
+ if (IS_ERR(extcon_class))
+ return PTR_ERR(extcon_class);
+ extcon_class->dev_groups = extcon_groups;
return 0;
}
}
EXPORT_SYMBOL_GPL(extcon_dev_free);
+/**
+ * extcon_alloc_cables() - alloc the cables for extcon device
+ * @edev: extcon device which has cables
+ *
+ * Returns 0 if success or error number if fail.
+ */
+static int extcon_alloc_cables(struct extcon_dev *edev)
+{
+ int index;
+ char *str;
+ struct extcon_cable *cable;
+
+ if (!edev)
+ return -EINVAL;
+
+ if (!edev->max_supported)
+ return 0;
+
+ edev->cables = kcalloc(edev->max_supported, sizeof(*edev->cables),
+ GFP_KERNEL);
+ if (!edev->cables)
+ return -ENOMEM;
+
+ for (index = 0; index < edev->max_supported; index++) {
+ cable = &edev->cables[index];
+
+ str = kasprintf(GFP_KERNEL, "cable.%d", index);
+ if (!str) {
+ for (index--; index >= 0; index--) {
+ cable = &edev->cables[index];
+ kfree(cable->attr_g.name);
+ }
+
+ kfree(edev->cables);
+ return -ENOMEM;
+ }
+
+ cable->edev = edev;
+ cable->cable_index = index;
+ cable->attrs[0] = &cable->attr_name.attr;
+ cable->attrs[1] = &cable->attr_state.attr;
+ cable->attrs[2] = NULL;
+ cable->attr_g.name = str;
+ cable->attr_g.attrs = cable->attrs;
+
+ sysfs_attr_init(&cable->attr_name.attr);
+ cable->attr_name.attr.name = "name";
+ cable->attr_name.attr.mode = 0444;
+ cable->attr_name.show = cable_name_show;
+
+ sysfs_attr_init(&cable->attr_state.attr);
+ cable->attr_state.attr.name = "state";
+ cable->attr_state.attr.mode = 0444;
+ cable->attr_state.show = cable_state_show;
+ }
+
+ return 0;
+}
+
+/**
+ * extcon_alloc_muex() - alloc the mutual exclusive for extcon device
+ * @edev: extcon device
+ *
+ * Returns 0 if success or error number if fail.
+ */
+static int extcon_alloc_muex(struct extcon_dev *edev)
+{
+ char *name;
+ int index;
+
+ if (!edev)
+ return -EINVAL;
+
+ if (!(edev->max_supported && edev->mutually_exclusive))
+ return 0;
+
+ /* Count the size of mutually_exclusive array */
+ for (index = 0; edev->mutually_exclusive[index]; index++)
+ ;
+
+ edev->attrs_muex = kcalloc(index + 1, sizeof(*edev->attrs_muex),
+ GFP_KERNEL);
+ if (!edev->attrs_muex)
+ return -ENOMEM;
+
+ edev->d_attrs_muex = kcalloc(index, sizeof(*edev->d_attrs_muex),
+ GFP_KERNEL);
+ if (!edev->d_attrs_muex) {
+ kfree(edev->attrs_muex);
+ return -ENOMEM;
+ }
+
+ for (index = 0; edev->mutually_exclusive[index]; index++) {
+ name = kasprintf(GFP_KERNEL, "0x%x",
+ edev->mutually_exclusive[index]);
+ if (!name) {
+ for (index--; index >= 0; index--)
+ kfree(edev->d_attrs_muex[index].attr.name);
+
+ kfree(edev->d_attrs_muex);
+ kfree(edev->attrs_muex);
+ return -ENOMEM;
+ }
+ sysfs_attr_init(&edev->d_attrs_muex[index].attr);
+ edev->d_attrs_muex[index].attr.name = name;
+ edev->d_attrs_muex[index].attr.mode = 0000;
+ edev->attrs_muex[index] = &edev->d_attrs_muex[index].attr;
+ }
+ edev->attr_g_muex.name = muex_name;
+ edev->attr_g_muex.attrs = edev->attrs_muex;
+
+ return 0;
+}
+
+/**
+ * extcon_alloc_groups() - alloc the groups for extcon device
+ * @edev: extcon device
+ *
+ * Returns 0 if success or error number if fail.
+ */
+static int extcon_alloc_groups(struct extcon_dev *edev)
+{
+ int index;
+
+ if (!edev)
+ return -EINVAL;
+
+ if (!edev->max_supported)
+ return 0;
+
+ edev->extcon_dev_type.groups = kcalloc(edev->max_supported + 2,
+ sizeof(*edev->extcon_dev_type.groups),
+ GFP_KERNEL);
+ if (!edev->extcon_dev_type.groups)
+ return -ENOMEM;
+
+ edev->extcon_dev_type.name = dev_name(&edev->dev);
+ edev->extcon_dev_type.release = dummy_sysfs_dev_release;
+
+ for (index = 0; index < edev->max_supported; index++)
+ edev->extcon_dev_type.groups[index] = &edev->cables[index].attr_g;
+
+ if (edev->mutually_exclusive)
+ edev->extcon_dev_type.groups[index] = &edev->attr_g_muex;
+
+ edev->dev.type = &edev->extcon_dev_type;
+
+ return 0;
+}
+
/**
* extcon_dev_register() - Register an new extcon device
* @edev: the extcon device to be registered
*/
int extcon_dev_register(struct extcon_dev *edev)
{
- int ret, index = 0;
- static atomic_t edev_no = ATOMIC_INIT(-1);
+ int ret, index;
- if (!extcon_class) {
- ret = create_extcon_class();
- if (ret < 0)
- return ret;
- }
+ ret = create_extcon_class();
+ if (ret < 0)
+ return ret;
if (!edev || !edev->supported_cable)
return -EINVAL;
- for (; edev->supported_cable[index] != EXTCON_NONE; index++);
+ for (index = 0; edev->supported_cable[index] != EXTCON_NONE; index++);
edev->max_supported = index;
if (index > SUPPORTED_CABLE_MAX) {
"extcon device name is null\n");
return -EINVAL;
}
- dev_set_name(&edev->dev, "extcon%lu",
- (unsigned long)atomic_inc_return(&edev_no));
-
- if (edev->max_supported) {
- char *str;
- struct extcon_cable *cable;
-
- edev->cables = kcalloc(edev->max_supported,
- sizeof(struct extcon_cable),
- GFP_KERNEL);
- if (!edev->cables) {
- ret = -ENOMEM;
- goto err_sysfs_alloc;
- }
- for (index = 0; index < edev->max_supported; index++) {
- cable = &edev->cables[index];
-
- str = kasprintf(GFP_KERNEL, "cable.%d", index);
- if (!str) {
- for (index--; index >= 0; index--) {
- cable = &edev->cables[index];
- kfree(cable->attr_g.name);
- }
- ret = -ENOMEM;
-
- goto err_alloc_cables;
- }
-
- cable->edev = edev;
- cable->cable_index = index;
- cable->attrs[0] = &cable->attr_name.attr;
- cable->attrs[1] = &cable->attr_state.attr;
- cable->attrs[2] = NULL;
- cable->attr_g.name = str;
- cable->attr_g.attrs = cable->attrs;
-
- sysfs_attr_init(&cable->attr_name.attr);
- cable->attr_name.attr.name = "name";
- cable->attr_name.attr.mode = 0444;
- cable->attr_name.show = cable_name_show;
-
- sysfs_attr_init(&cable->attr_state.attr);
- cable->attr_state.attr.name = "state";
- cable->attr_state.attr.mode = 0444;
- cable->attr_state.show = cable_state_show;
- }
- }
- if (edev->max_supported && edev->mutually_exclusive) {
- char *name;
-
- /* Count the size of mutually_exclusive array */
- for (index = 0; edev->mutually_exclusive[index]; index++)
- ;
-
- edev->attrs_muex = kcalloc(index + 1,
- sizeof(struct attribute *),
- GFP_KERNEL);
- if (!edev->attrs_muex) {
- ret = -ENOMEM;
- goto err_muex;
- }
-
- edev->d_attrs_muex = kcalloc(index,
- sizeof(struct device_attribute),
- GFP_KERNEL);
- if (!edev->d_attrs_muex) {
- ret = -ENOMEM;
- kfree(edev->attrs_muex);
- goto err_muex;
- }
-
- for (index = 0; edev->mutually_exclusive[index]; index++) {
- name = kasprintf(GFP_KERNEL, "0x%x",
- edev->mutually_exclusive[index]);
- if (!name) {
- for (index--; index >= 0; index--) {
- kfree(edev->d_attrs_muex[index].attr.
- name);
- }
- kfree(edev->d_attrs_muex);
- kfree(edev->attrs_muex);
- ret = -ENOMEM;
- goto err_muex;
- }
- sysfs_attr_init(&edev->d_attrs_muex[index].attr);
- edev->d_attrs_muex[index].attr.name = name;
- edev->d_attrs_muex[index].attr.mode = 0000;
- edev->attrs_muex[index] = &edev->d_attrs_muex[index]
- .attr;
- }
- edev->attr_g_muex.name = muex_name;
- edev->attr_g_muex.attrs = edev->attrs_muex;
+ ret = ida_alloc(&extcon_dev_ids, GFP_KERNEL);
+ if (ret < 0)
+ return ret;
- }
+ edev->id = ret;
- if (edev->max_supported) {
- edev->extcon_dev_type.groups =
- kcalloc(edev->max_supported + 2,
- sizeof(struct attribute_group *),
- GFP_KERNEL);
- if (!edev->extcon_dev_type.groups) {
- ret = -ENOMEM;
- goto err_alloc_groups;
- }
+ dev_set_name(&edev->dev, "extcon%d", edev->id);
- edev->extcon_dev_type.name = dev_name(&edev->dev);
- edev->extcon_dev_type.release = dummy_sysfs_dev_release;
+ ret = extcon_alloc_cables(edev);
+ if (ret < 0)
+ goto err_alloc_cables;
- for (index = 0; index < edev->max_supported; index++)
- edev->extcon_dev_type.groups[index] =
- &edev->cables[index].attr_g;
- if (edev->mutually_exclusive)
- edev->extcon_dev_type.groups[index] =
- &edev->attr_g_muex;
+ ret = extcon_alloc_muex(edev);
+ if (ret < 0)
+ goto err_alloc_muex;
- edev->dev.type = &edev->extcon_dev_type;
- }
+ ret = extcon_alloc_groups(edev);
+ if (ret < 0)
+ goto err_alloc_groups;
spin_lock_init(&edev->lock);
if (edev->max_supported) {
kfree(edev->d_attrs_muex);
kfree(edev->attrs_muex);
}
-err_muex:
+err_alloc_muex:
for (index = 0; index < edev->max_supported; index++)
kfree(edev->cables[index].attr_g.name);
-err_alloc_cables:
if (edev->max_supported)
kfree(edev->cables);
-err_sysfs_alloc:
+err_alloc_cables:
+ ida_free(&extcon_dev_ids, edev->id);
+
return ret;
}
EXPORT_SYMBOL_GPL(extcon_dev_register);
list_del(&edev->entry);
mutex_unlock(&extcon_dev_list_lock);
- if (IS_ERR_OR_NULL(get_device(&edev->dev))) {
- dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n",
- dev_name(&edev->dev));
+ if (!get_device(&edev->dev)) {
+ dev_err(&edev->dev, "Failed to unregister extcon_dev\n");
return;
}
+ ida_free(&extcon_dev_ids, edev->id);
+
device_unregister(&edev->dev);
if (edev->mutually_exclusive && edev->max_supported) {
mutex_lock(&extcon_dev_list_lock);
list_for_each_entry(edev, &extcon_dev_list, entry)
- if (edev->dev.parent && edev->dev.parent->of_node == node)
+ if (edev->dev.parent && device_match_of_node(edev->dev.parent, node))
goto out;
edev = ERR_PTR(-EPROBE_DEFER);
out:
*/
struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)
{
- struct device_node *node;
+ struct device_node *node, *np = dev_of_node(dev);
struct extcon_dev *edev;
- if (!dev)
- return ERR_PTR(-EINVAL);
-
- if (!dev->of_node) {
+ if (!np) {
dev_dbg(dev, "device does not have a device node entry\n");
return ERR_PTR(-EINVAL);
}
- node = of_parse_phandle(dev->of_node, "extcon", index);
+ node = of_parse_phandle(np, "extcon", index);
if (!node) {
- dev_dbg(dev, "failed to get phandle in %pOF node\n",
- dev->of_node);
+ dev_dbg(dev, "failed to get phandle in %pOF node\n", np);
return ERR_PTR(-ENODEV);
}
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