drivers/mux/core.c

65 	struct mux_chip *mux_chip = to_mux_chip(dev);
67 	ida_free(&mux_ida, mux_chip->id);
68 	kfree(mux_chip);
84  * the number of valid mux states in the mux_chip->mux[N].states members and
85  * the desired idle state in the returned mux_chip->mux[N].idle_state members.
87  * provide a pointer to the operations struct in the mux_chip->ops member
92 struct mux_chip *mux_chip_alloc(struct device *dev,
95 	struct mux_chip *mux_chip;
101 	mux_chip = kzalloc(sizeof(*mux_chip) +
102 			   controllers * sizeof(*mux_chip->mux) +
104 	if (!mux_chip)
107 	mux_chip->mux = (struct mux_control *)(mux_chip + 1);
108 	mux_chip->dev.class = &mux_class;
109 	mux_chip->dev.type = &mux_type;
110 	mux_chip->dev.parent = dev;
111 	mux_chip->dev.of_node = dev->of_node;
112 	dev_set_drvdata(&mux_chip->dev, mux_chip);
114 	mux_chip->id = ida_alloc(&mux_ida, GFP_KERNEL);
115 	if (mux_chip->id < 0) {
116 		int err = mux_chip->id;
119 		kfree(mux_chip);
122 	dev_set_name(&mux_chip->dev, "muxchip%d", mux_chip->id);
124 	mux_chip->controllers = controllers;
126 		struct mux_control *mux = &mux_chip->mux[i];
128 		mux->chip = mux_chip;
135 	device_initialize(&mux_chip->dev);
137 	return mux_chip;
155  * @mux_chip: The mux-chip to register.
163 int mux_chip_register(struct mux_chip *mux_chip)
168 	for (i = 0; i < mux_chip->controllers; ++i) {
169 		struct mux_control *mux = &mux_chip->mux[i];
176 			dev_err(&mux_chip->dev, "unable to set idle state\n");
181 	ret = device_add(&mux_chip->dev);
183 		dev_err(&mux_chip->dev,
191  * @mux_chip: The mux-chip to unregister.
197 void mux_chip_unregister(struct mux_chip *mux_chip)
199 	device_del(&mux_chip->dev);
205  * @mux_chip: The mux-chip to free.
209 void mux_chip_free(struct mux_chip *mux_chip)
211 	if (!mux_chip)
214 	put_device(&mux_chip->dev);
220 	struct mux_chip *mux_chip = *(struct mux_chip **)res;
222 	mux_chip_free(mux_chip);
235 struct mux_chip *devm_mux_chip_alloc(struct device *dev,
239 	struct mux_chip **ptr, *mux_chip;
245 	mux_chip = mux_chip_alloc(dev, controllers, sizeof_priv);
246 	if (IS_ERR(mux_chip)) {
248 		return mux_chip;
251 	*ptr = mux_chip;
254 	return mux_chip;
260 	struct mux_chip *mux_chip = *(struct mux_chip **)res;
262 	mux_chip_unregister(mux_chip);
268  * @mux_chip: The mux-chip to register.
275 			   struct mux_chip *mux_chip)
277 	struct mux_chip **ptr;
284 	res = mux_chip_register(mux_chip);
290 	*ptr = mux_chip;
510 /* Note this function returns a reference to the mux_chip dev. */
511 static struct mux_chip *of_find_mux_chip_by_node(struct device_node *np)
534 	struct mux_chip *mux_chip;
567 	mux_chip = of_find_mux_chip_by_node(args.np);
569 	if (!mux_chip)
575 		    (args.args_count < 2 && mux_chip->controllers > 1)) {
578 			put_device(&mux_chip->dev);
591 		    (!args.args_count && mux_chip->controllers > 1)) {
594 			put_device(&mux_chip->dev);
602 	if (controller >= mux_chip->controllers) {
605 		put_device(&mux_chip->dev);
609 	return &mux_chip->mux[controller];