2  * max8952.c - Voltage and current regulation for the Maxim 8952
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
60 	int ret = i2c_smbus_read_byte_data(max8952->client, reg);  in max8952_read_reg()
71 	return i2c_smbus_write_byte_data(max8952->client, reg, value);  in max8952_write_reg()
80 		return -EINVAL;  in max8952_list_voltage()
82 	return (max8952->pdata->dvs_mode[selector] * 10 + 770) * 1000;  in max8952_list_voltage()
90 	if (max8952->vid0)  in max8952_get_voltage_sel()
92 	if (max8952->vid1)  in max8952_get_voltage_sel()
103 	if (!gpio_is_valid(max8952->pdata->gpio_vid0) ||  in max8952_set_voltage_sel()
104 			!gpio_is_valid(max8952->pdata->gpio_vid1)) {  in max8952_set_voltage_sel()
106 		return -EPERM;  in max8952_set_voltage_sel()
109 	max8952->vid0 = selector & 0x1;  in max8952_set_voltage_sel()
110 	max8952->vid1 = (selector >> 1) & 0x1;  in max8952_set_voltage_sel()
111 	gpio_set_value(max8952->pdata->gpio_vid0, max8952->vid0);  in max8952_set_voltage_sel()
112 	gpio_set_value(max8952->pdata->gpio_vid1, max8952->vid1);  in max8952_set_voltage_sel()
141 	struct max8952_platform_data *pd;  in max8952_parse_dt()  local
142 	struct device_node *np = dev->of_node;  in max8952_parse_dt()
146 	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);  in max8952_parse_dt()
147 	if (!pd)  in max8952_parse_dt()
150 	pd->gpio_vid0 = of_get_named_gpio(np, "max8952,vid-gpios", 0);  in max8952_parse_dt()
151 	pd->gpio_vid1 = of_get_named_gpio(np, "max8952,vid-gpios", 1);  in max8952_parse_dt()
153 	if (of_property_read_u32(np, "max8952,default-mode", &pd->default_mode))  in max8952_parse_dt()
156 	ret = of_property_read_u32_array(np, "max8952,dvs-mode-microvolt",  in max8952_parse_dt()
157 					pd->dvs_mode, ARRAY_SIZE(pd->dvs_mode));  in max8952_parse_dt()
159 		dev_err(dev, "max8952,dvs-mode-microvolt property not specified");  in max8952_parse_dt()
163 	for (i = 0; i < ARRAY_SIZE(pd->dvs_mode); ++i) {  in max8952_parse_dt()
164 		if (pd->dvs_mode[i] < 770000 || pd->dvs_mode[i] > 1400000) {  in max8952_parse_dt()
168 		pd->dvs_mode[i] = (pd->dvs_mode[i] - 770000) / 10000;  in max8952_parse_dt()
171 	if (of_property_read_u32(np, "max8952,sync-freq", &pd->sync_freq))  in max8952_parse_dt()
172 		dev_warn(dev, "max8952,sync-freq property not specified, defaulting to 26MHz\n");  in max8952_parse_dt()
174 	if (of_property_read_u32(np, "max8952,ramp-speed", &pd->ramp_speed))  in max8952_parse_dt()
175 		dev_warn(dev, "max8952,ramp-speed property not specified, defaulting to 32mV/us\n");  in max8952_parse_dt()
177 	pd->reg_data = of_get_regulator_init_data(dev, np, &regulator);  in max8952_parse_dt()
178 	if (!pd->reg_data) {  in max8952_parse_dt()
183 	return pd;  in max8952_parse_dt()
195 	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);  in max8952_pmic_probe()
196 	struct max8952_platform_data *pdata = dev_get_platdata(&client->dev);  in max8952_pmic_probe()
205 	if (client->dev.of_node)  in max8952_pmic_probe()
206 		pdata = max8952_parse_dt(&client->dev);  in max8952_pmic_probe()
209 		dev_err(&client->dev, "Require the platform data\n");  in max8952_pmic_probe()
210 		return -EINVAL;  in max8952_pmic_probe()
214 		return -EIO;  in max8952_pmic_probe()
216 	max8952 = devm_kzalloc(&client->dev, sizeof(struct max8952_data),  in max8952_pmic_probe()
219 		return -ENOMEM;  in max8952_pmic_probe()
221 	max8952->client = client;  in max8952_pmic_probe()
222 	max8952->pdata = pdata;  in max8952_pmic_probe()
224 	config.dev = &client->dev;  in max8952_pmic_probe()
225 	config.init_data = pdata->reg_data;  in max8952_pmic_probe()
227 	config.of_node = client->dev.of_node;  in max8952_pmic_probe()
229 	if (pdata->reg_data->constraints.boot_on)  in max8952_pmic_probe()
233 	gpiod = devm_gpiod_get_optional(&client->dev,  in max8952_pmic_probe()
241 	rdev = devm_regulator_register(&client->dev, &regulator, &config);  in max8952_pmic_probe()
244 		dev_err(&client->dev, "regulator init failed (%d)\n", ret);  in max8952_pmic_probe()
248 	max8952->vid0 = pdata->default_mode & 0x1;  in max8952_pmic_probe()
249 	max8952->vid1 = (pdata->default_mode >> 1) & 0x1;  in max8952_pmic_probe()
251 	if (gpio_is_valid(pdata->gpio_vid0) &&  in max8952_pmic_probe()
252 			gpio_is_valid(pdata->gpio_vid1)) {  in max8952_pmic_probe()
255 		gpio_flags = max8952->vid0 ?  in max8952_pmic_probe()
257 		if (devm_gpio_request_one(&client->dev, pdata->gpio_vid0,  in max8952_pmic_probe()
261 		gpio_flags = max8952->vid1 ?  in max8952_pmic_probe()
263 		if (devm_gpio_request_one(&client->dev, pdata->gpio_vid1,  in max8952_pmic_probe()
270 		dev_warn(&client->dev, "VID0/1 gpio invalid: "  in max8952_pmic_probe()
272 		max8952->vid0 = 0;  in max8952_pmic_probe()
273 		max8952->vid1 = 0;  in max8952_pmic_probe()
275 		pdata->gpio_vid0 = -1;  in max8952_pmic_probe()
276 		pdata->gpio_vid1 = -1;  in max8952_pmic_probe()
281 		dev_err(&client->dev, "DVS modes disabled because VID0 and VID1"  in max8952_pmic_probe()
298 			(pdata->dvs_mode[0] & 0x3F));  in max8952_pmic_probe()
302 			(pdata->dvs_mode[1] & 0x3F));  in max8952_pmic_probe()
306 			(pdata->dvs_mode[2] & 0x3F));  in max8952_pmic_probe()
310 			(pdata->dvs_mode[3] & 0x3F));  in max8952_pmic_probe()
314 			((pdata->sync_freq & 0x3) << 6));  in max8952_pmic_probe()
317 			((pdata->ramp_speed & 0x7) << 5));  in max8952_pmic_probe()