1 // SPDX-License-Identifier: GPL-2.0-only
3  * i2sbus driver -- bus control routines
25 		return -ENOMEM;  in i2sbus_control_init()
27 	INIT_LIST_HEAD(&(*c)->list);  in i2sbus_control_init()
29 	(*c)->macio = dev->bus->chip;  in i2sbus_control_init()
38 /* this is serialised externally */
44 	np = i2sdev->sound.ofdev.dev.of_node;  in i2sbus_control_add_dev()
45 	i2sdev->enable = pmf_find_function(np, "enable");  in i2sbus_control_add_dev()
46 	i2sdev->cell_enable = pmf_find_function(np, "cell-enable");  in i2sbus_control_add_dev()
47 	i2sdev->clock_enable = pmf_find_function(np, "clock-enable");  in i2sbus_control_add_dev()
48 	i2sdev->cell_disable = pmf_find_function(np, "cell-disable");  in i2sbus_control_add_dev()
49 	i2sdev->clock_disable = pmf_find_function(np, "clock-disable");  in i2sbus_control_add_dev()
52 	 * the platform functions -- there's nothing in Darwin that  in i2sbus_control_add_dev()
56 	if (i2sdev->bus_number != 0 && i2sdev->bus_number != 1 &&  in i2sbus_control_add_dev()
57 	    (!i2sdev->enable ||  in i2sbus_control_add_dev()
58 	     !i2sdev->cell_enable || !i2sdev->clock_enable ||  in i2sbus_control_add_dev()
59 	     !i2sdev->cell_disable || !i2sdev->clock_disable)) {  in i2sbus_control_add_dev()
60 		pmf_put_function(i2sdev->enable);  in i2sbus_control_add_dev()
61 		pmf_put_function(i2sdev->cell_enable);  in i2sbus_control_add_dev()
62 		pmf_put_function(i2sdev->clock_enable);  in i2sbus_control_add_dev()
63 		pmf_put_function(i2sdev->cell_disable);  in i2sbus_control_add_dev()
64 		pmf_put_function(i2sdev->clock_disable);  in i2sbus_control_add_dev()
65 		return -ENODEV;  in i2sbus_control_add_dev()
68 	list_add(&i2sdev->item, &c->list);  in i2sbus_control_add_dev()
76 	/* this is serialised externally */  in i2sbus_control_remove_dev()
77 	list_del(&i2sdev->item);  in i2sbus_control_remove_dev()
78 	if (list_empty(&c->list))  in i2sbus_control_remove_dev()
86 	struct macio_chip *macio = c->macio;  in i2sbus_control_enable()
88 	if (i2sdev->enable)  in i2sbus_control_enable()
89 		return pmf_call_one(i2sdev->enable, &args);  in i2sbus_control_enable()
91 	if (macio == NULL || macio->base == NULL)  in i2sbus_control_enable()
92 		return -ENODEV;  in i2sbus_control_enable()
94 	switch (i2sdev->bus_number) {  in i2sbus_control_enable()
104 		return -ENODEV;  in i2sbus_control_enable()
111 			int enable)  in i2sbus_control_cell()  argument
114 	struct macio_chip *macio = c->macio;  in i2sbus_control_cell()
116 	switch (enable) {  in i2sbus_control_cell()
118 		if (i2sdev->cell_disable)  in i2sbus_control_cell()
119 			return pmf_call_one(i2sdev->cell_disable, &args);  in i2sbus_control_cell()
122 		if (i2sdev->cell_enable)  in i2sbus_control_cell()
123 			return pmf_call_one(i2sdev->cell_enable, &args);  in i2sbus_control_cell()
126 		printk(KERN_ERR "i2sbus: INVALID CELL ENABLE VALUE\n");  in i2sbus_control_cell()
127 		return -ENODEV;  in i2sbus_control_cell()
130 	if (macio == NULL || macio->base == NULL)  in i2sbus_control_cell()
131 		return -ENODEV;  in i2sbus_control_cell()
133 	switch (i2sdev->bus_number) {  in i2sbus_control_cell()
135 		if (enable)  in i2sbus_control_cell()
141 		if (enable)  in i2sbus_control_cell()
147 		return -ENODEV;  in i2sbus_control_cell()
154 			 int enable)  in i2sbus_control_clock()  argument
157 	struct macio_chip *macio = c->macio;  in i2sbus_control_clock()
159 	switch (enable) {  in i2sbus_control_clock()
161 		if (i2sdev->clock_disable)  in i2sbus_control_clock()
162 			return pmf_call_one(i2sdev->clock_disable, &args);  in i2sbus_control_clock()
165 		if (i2sdev->clock_enable)  in i2sbus_control_clock()
166 			return pmf_call_one(i2sdev->clock_enable, &args);  in i2sbus_control_clock()
169 		printk(KERN_ERR "i2sbus: INVALID CLOCK ENABLE VALUE\n");  in i2sbus_control_clock()
170 		return -ENODEV;  in i2sbus_control_clock()
173 	if (macio == NULL || macio->base == NULL)  in i2sbus_control_clock()
174 		return -ENODEV;  in i2sbus_control_clock()
176 	switch (i2sdev->bus_number) {  in i2sbus_control_clock()
178 		if (enable)  in i2sbus_control_clock()
184 		if (enable)  in i2sbus_control_clock()
190 		return -ENODEV;  in i2sbus_control_clock()