1 // SPDX-License-Identifier: GPL-2.0-only
9 #include <linux/regulator/driver.h>
10 #include <linux/regulator/machine.h>
11 #include <linux/regulator/of_regulator.h>
29 		.index = data->index,  in cros_ec_regulator_enable()
33 	return cros_ec_cmd(data->ec_dev, 0, EC_CMD_REGULATOR_ENABLE, &cmd,  in cros_ec_regulator_enable()
41 		.index = data->index,  in cros_ec_regulator_disable()
45 	return cros_ec_cmd(data->ec_dev, 0, EC_CMD_REGULATOR_ENABLE, &cmd,  in cros_ec_regulator_disable()
53 		.index = data->index,  in cros_ec_regulator_is_enabled()
58 	ret = cros_ec_cmd(data->ec_dev, 0, EC_CMD_REGULATOR_IS_ENABLED, &cmd,  in cros_ec_regulator_is_enabled()
70 	if (selector >= data->num_voltages)  in cros_ec_regulator_list_voltage()
71 		return -EINVAL;  in cros_ec_regulator_list_voltage()
73 	return data->voltages_mV[selector] * 1000;  in cros_ec_regulator_list_voltage()
80 		.index = data->index,  in cros_ec_regulator_get_voltage()
85 	ret = cros_ec_cmd(data->ec_dev, 0, EC_CMD_REGULATOR_GET_VOLTAGE, &cmd,  in cros_ec_regulator_get_voltage()
99 		.index = data->index,  in cros_ec_regulator_set_voltage()
109 		return -EINVAL;  in cros_ec_regulator_set_voltage()
111 	return cros_ec_cmd(data->ec_dev, 0, EC_CMD_REGULATOR_SET_VOLTAGE, &cmd,  in cros_ec_regulator_set_voltage()
128 		.index = data->index,  in cros_ec_regulator_init_info()
133 	ret = cros_ec_cmd(data->ec_dev, 0, EC_CMD_REGULATOR_GET_INFO, &cmd,  in cros_ec_regulator_init_info()
138 	data->num_voltages =  in cros_ec_regulator_init_info()
140 	data->voltages_mV =  in cros_ec_regulator_init_info()
142 			     sizeof(u16) * data->num_voltages, GFP_KERNEL);  in cros_ec_regulator_init_info()
143 	if (!data->voltages_mV)  in cros_ec_regulator_init_info()
144 		return -ENOMEM;  in cros_ec_regulator_init_info()
146 	data->desc.n_voltages = data->num_voltages;  in cros_ec_regulator_init_info()
149 	resp.name[ARRAY_SIZE(resp.name) - 1] = '\0';  in cros_ec_regulator_init_info()
150 	data->desc.name = devm_kstrdup(dev, resp.name, GFP_KERNEL);  in cros_ec_regulator_init_info()
151 	if (!data->desc.name)  in cros_ec_regulator_init_info()
152 		return -ENOMEM;  in cros_ec_regulator_init_info()
159 	struct device *dev = &pdev->dev;  in cros_ec_regulator_probe()
160 	struct device_node *np = dev->of_node;  in cros_ec_regulator_probe()
168 		&pdev->dev, sizeof(struct cros_ec_regulator_data), GFP_KERNEL);  in cros_ec_regulator_probe()
170 		return -ENOMEM;  in cros_ec_regulator_probe()
172 	drvdata->ec_dev = dev_get_drvdata(dev->parent);  in cros_ec_regulator_probe()
173 	desc = &drvdata->desc;  in cros_ec_regulator_probe()
177 		return -EINVAL;  in cros_ec_regulator_probe()
179 	ret = of_property_read_u32(np, "reg", &drvdata->index);  in cros_ec_regulator_probe()
183 	desc->owner = THIS_MODULE;  in cros_ec_regulator_probe()
184 	desc->type = REGULATOR_VOLTAGE;  in cros_ec_regulator_probe()
185 	desc->ops = &cros_ec_regulator_voltage_ops;  in cros_ec_regulator_probe()
191 	cfg.dev = &pdev->dev;  in cros_ec_regulator_probe()
196 	drvdata->dev = devm_regulator_register(dev, &drvdata->desc, &cfg);  in cros_ec_regulator_probe()
197 	if (IS_ERR(drvdata->dev)) {  in cros_ec_regulator_probe()
198 		ret = PTR_ERR(drvdata->dev);  in cros_ec_regulator_probe()
199 		dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);  in cros_ec_regulator_probe()
209 	{ .compatible = "google,cros-ec-regulator", },
217 		.name		= "cros-ec-regulator",
226 MODULE_DESCRIPTION("ChromeOS EC controlled regulator");
227 MODULE_AUTHOR("Pi-Hsun Shih <pihsun@chromium.org>");