1 // SPDX-License-Identifier: GPL-2.0-only
3  * i2sbus driver -- bus control routines
24 		return -ENOMEM;  in i2sbus_control_init()
26 	INIT_LIST_HEAD(&(*c)->list);  in i2sbus_control_init()
28 	(*c)->macio = dev->bus->chip;  in i2sbus_control_init()
37 /* this is serialised externally */
43 	np = i2sdev->sound.ofdev.dev.of_node;  in i2sbus_control_add_dev()
44 	i2sdev->enable = pmf_find_function(np, "enable");  in i2sbus_control_add_dev()
45 	i2sdev->cell_enable = pmf_find_function(np, "cell-enable");  in i2sbus_control_add_dev()
46 	i2sdev->clock_enable = pmf_find_function(np, "clock-enable");  in i2sbus_control_add_dev()
47 	i2sdev->cell_disable = pmf_find_function(np, "cell-disable");  in i2sbus_control_add_dev()
48 	i2sdev->clock_disable = pmf_find_function(np, "clock-disable");  in i2sbus_control_add_dev()
51 	 * the platform functions -- there's nothing in Darwin that  in i2sbus_control_add_dev()
55 	if (i2sdev->bus_number != 0 && i2sdev->bus_number != 1 &&  in i2sbus_control_add_dev()
56 	    (!i2sdev->enable ||  in i2sbus_control_add_dev()
57 	     !i2sdev->cell_enable || !i2sdev->clock_enable ||  in i2sbus_control_add_dev()
58 	     !i2sdev->cell_disable || !i2sdev->clock_disable)) {  in i2sbus_control_add_dev()
59 		pmf_put_function(i2sdev->enable);  in i2sbus_control_add_dev()
60 		pmf_put_function(i2sdev->cell_enable);  in i2sbus_control_add_dev()
61 		pmf_put_function(i2sdev->clock_enable);  in i2sbus_control_add_dev()
62 		pmf_put_function(i2sdev->cell_disable);  in i2sbus_control_add_dev()
63 		pmf_put_function(i2sdev->clock_disable);  in i2sbus_control_add_dev()
64 		return -ENODEV;  in i2sbus_control_add_dev()
67 	list_add(&i2sdev->item, &c->list);  in i2sbus_control_add_dev()
75 	/* this is serialised externally */  in i2sbus_control_remove_dev()
76 	list_del(&i2sdev->item);  in i2sbus_control_remove_dev()
77 	if (list_empty(&c->list))  in i2sbus_control_remove_dev()
85 	struct macio_chip *macio = c->macio;  in i2sbus_control_enable()
87 	if (i2sdev->enable)  in i2sbus_control_enable()
88 		return pmf_call_one(i2sdev->enable, &args);  in i2sbus_control_enable()
90 	if (macio == NULL || macio->base == NULL)  in i2sbus_control_enable()
91 		return -ENODEV;  in i2sbus_control_enable()
93 	switch (i2sdev->bus_number) {  in i2sbus_control_enable()
103 		return -ENODEV;  in i2sbus_control_enable()
110 			int enable)  in i2sbus_control_cell()  argument
113 	struct macio_chip *macio = c->macio;  in i2sbus_control_cell()
115 	switch (enable) {  in i2sbus_control_cell()
117 		if (i2sdev->cell_disable)  in i2sbus_control_cell()
118 			return pmf_call_one(i2sdev->cell_disable, &args);  in i2sbus_control_cell()
121 		if (i2sdev->cell_enable)  in i2sbus_control_cell()
122 			return pmf_call_one(i2sdev->cell_enable, &args);  in i2sbus_control_cell()
125 		printk(KERN_ERR "i2sbus: INVALID CELL ENABLE VALUE\n");  in i2sbus_control_cell()
126 		return -ENODEV;  in i2sbus_control_cell()
129 	if (macio == NULL || macio->base == NULL)  in i2sbus_control_cell()
130 		return -ENODEV;  in i2sbus_control_cell()
132 	switch (i2sdev->bus_number) {  in i2sbus_control_cell()
134 		if (enable)  in i2sbus_control_cell()
140 		if (enable)  in i2sbus_control_cell()
146 		return -ENODEV;  in i2sbus_control_cell()
153 			 int enable)  in i2sbus_control_clock()  argument
156 	struct macio_chip *macio = c->macio;  in i2sbus_control_clock()
158 	switch (enable) {  in i2sbus_control_clock()
160 		if (i2sdev->clock_disable)  in i2sbus_control_clock()
161 			return pmf_call_one(i2sdev->clock_disable, &args);  in i2sbus_control_clock()
164 		if (i2sdev->clock_enable)  in i2sbus_control_clock()
165 			return pmf_call_one(i2sdev->clock_enable, &args);  in i2sbus_control_clock()
168 		printk(KERN_ERR "i2sbus: INVALID CLOCK ENABLE VALUE\n");  in i2sbus_control_clock()
169 		return -ENODEV;  in i2sbus_control_clock()
172 	if (macio == NULL || macio->base == NULL)  in i2sbus_control_clock()
173 		return -ENODEV;  in i2sbus_control_clock()
175 	switch (i2sdev->bus_number) {  in i2sbus_control_clock()
177 		if (enable)  in i2sbus_control_clock()
183 		if (enable)  in i2sbus_control_clock()
189 		return -ENODEV;  in i2sbus_control_clock()