* struct mux_state - Represents a mux controller state specific to a given
* consumer.
* @mux: Pointer to a mux controller.
- * @state State of the mux to be selected.
+ * @state: State of the mux to be selected.
*
* This structure is specific to the consumer that acquires it and has
* information specific to that consumer.
* @delay_us: The time to delay (in microseconds) if the mux state is changed.
*
* On successfully selecting the mux-control state, it will be locked until
- * mux_control_deselect() called.
+ * mux_control_deselect() is called.
*
* Therefore, make sure to call mux_control_deselect() when the operation is
* complete and the mux-control is free for others to use, but do not call
}
EXPORT_SYMBOL_GPL(devm_mux_control_get);
+/*
+ * mux_state_get() - Get the mux-state for a device.
+ * @dev: The device that needs a mux-state.
+ * @mux_name: The name identifying the mux-state.
+ *
+ * Return: A pointer to the mux-state, or an ERR_PTR with a negative errno.
+ */
+static struct mux_state *mux_state_get(struct device *dev, const char *mux_name)
+{
+ struct mux_state *mstate;
+
+ mstate = kzalloc(sizeof(*mstate), GFP_KERNEL);
+ if (!mstate)
+ return ERR_PTR(-ENOMEM);
+
+ mstate->mux = mux_get(dev, mux_name, &mstate->state);
+ if (IS_ERR(mstate->mux)) {
+ int err = PTR_ERR(mstate->mux);
+
+ kfree(mstate);
+ return ERR_PTR(err);
+ }
+
+ return mstate;
+}
+
/*
* mux_state_put() - Put away the mux-state for good.
* @mstate: The mux-state to put away.
const char *mux_name)
{
struct mux_state **ptr, *mstate;
- struct mux_control *mux_ctrl;
- int state;
-
- mstate = devm_kzalloc(dev, sizeof(struct mux_state), GFP_KERNEL);
- if (!mstate)
- return ERR_PTR(-ENOMEM);
ptr = devres_alloc(devm_mux_state_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
- mux_ctrl = mux_get(dev, mux_name, &state);
- if (IS_ERR(mux_ctrl)) {
+ mstate = mux_state_get(dev, mux_name);
+ if (IS_ERR(mstate)) {
devres_free(ptr);
- return (struct mux_state *)mux_ctrl;
+ return mstate;
}
- mstate->mux = mux_ctrl;
- mstate->state = state;
*ptr = mstate;
devres_add(dev, ptr);