1 // SPDX-License-Identifier: GPL-2.0
3  * R-Car Generation 2 da9063(L)/da9210 regulator quirk
6  * regulators. All of these regulators have their interrupt request lines
7  * tied to the same interrupt pin (IRQ2) on the SoC.
9  * After cold boot or da9063-induced restart, both the da9063 and da9210 seem
10  * to assert their interrupt request lines.  Hence as soon as one driver
11  * requests this irq, it gets stuck in an interrupt storm, as it only manages
12  * to deassert its own interrupt request line, and the other driver hasn't
13  * installed an interrupt handler yet.
46 	bool				shared;	/* IRQ line is shared */  member
91 	if (action != BUS_NOTIFY_ADD_DEVICE || dev->type == &i2c_adapter_type)  in regulator_quirk_notify()
95 	dev_dbg(dev, "Detected %s\n", client->name);  in regulator_quirk_notify()
103 		if (!pos->shared)  in regulator_quirk_notify()
106 		if (pos->np->parent != client->dev.parent->of_node)  in regulator_quirk_notify()
109 		dev_info(&client->dev, "clearing %s@0x%02x interrupts\n",  in regulator_quirk_notify()
110 			 pos->id->compatible, pos->i2c_msg.addr);  in regulator_quirk_notify()
112 		ret = i2c_transfer(client->adapter, &pos->i2c_msg, 1);  in regulator_quirk_notify()
114 			dev_err(&client->dev, "i2c error %d\n", ret);  in regulator_quirk_notify()
127 		list_del(&pos->list);  in regulator_quirk_notify()
128 		of_node_put(pos->np);  in regulator_quirk_notify()
155 		return -ENODEV;  in rcar_gen2_regulator_quirk()
169 			ret = -ENOMEM;  in rcar_gen2_regulator_quirk()
174 		argsa = &quirk->irq_args;  in rcar_gen2_regulator_quirk()
175 		memcpy(&quirk->i2c_msg, id->data, sizeof(quirk->i2c_msg));  in rcar_gen2_regulator_quirk()
177 		quirk->id = id;  in rcar_gen2_regulator_quirk()
178 		quirk->np = of_node_get(np);  in rcar_gen2_regulator_quirk()
179 		quirk->i2c_msg.addr = addr;  in rcar_gen2_regulator_quirk()
189 			argsb = &pos->irq_args;  in rcar_gen2_regulator_quirk()
191 			if (argsa->args_count != argsb->args_count)  in rcar_gen2_regulator_quirk()
194 			ret = memcmp(argsa->args, argsb->args,  in rcar_gen2_regulator_quirk()
195 				     argsa->args_count *  in rcar_gen2_regulator_quirk()
196 				     sizeof(argsa->args[0]));  in rcar_gen2_regulator_quirk()
198 				pos->shared = true;  in rcar_gen2_regulator_quirk()
199 				quirk->shared = true;  in rcar_gen2_regulator_quirk()
203 		list_add_tail(&quirk->list, &quirk_list);  in rcar_gen2_regulator_quirk()
208 		ret = -ENOMEM;  in rcar_gen2_regulator_quirk()
229 		list_del(&pos->list);  in rcar_gen2_regulator_quirk()
230 		of_node_put(pos->np);  in rcar_gen2_regulator_quirk()