1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2013 ST-Ericsson SA
6  * Written on behalf of Linaro for ST-Ericsson
22  * This driver can only access the non-USB portions of STw4811, the register
23  * range 0x00-0x10 dealing with USB is bound to the two special I2C pins used
33  * stw481x_get_pctl_reg() - get a power control register
37  * The power control registers is a set of one-time-programmable registers
52 	ret = regmap_write(stw481x->map, STW_PCTL_REG_HI, msb);  in stw481x_get_pctl_reg()
55 	ret = regmap_write(stw481x->map, STW_PCTL_REG_LO, lsb);  in stw481x_get_pctl_reg()
58 	ret = regmap_read(stw481x->map, STW_PCTL_REG_HI, &val);  in stw481x_get_pctl_reg()
62 	ret = regmap_read(stw481x->map, STW_PCTL_REG_LO, &val);  in stw481x_get_pctl_reg()
67 		return -EIO;  in stw481x_get_pctl_reg()
89 	ret = regmap_read(stw481x->map, STW_CONF1, &val);  in stw481x_startup()
95 	dev_info(&stw481x->client->dev, "voltages %s\n",  in stw481x_startup()
97 	dev_info(&stw481x->client->dev, "MMC level shifter %s\n",  in stw481x_startup()
98 		(val & STW_CONF1_MMC_LS_STATUS) ? "high impedance" : "ON");  in stw481x_startup()
99 	dev_info(&stw481x->client->dev, "VMMC: %s\n",  in stw481x_startup()
102 	dev_info(&stw481x->client->dev, "STw481x power control registers:\n");  in stw481x_startup()
120 	dev_info(&stw481x->client->dev, "VCORE: %u.%uV %s\n",  in stw481x_startup()
124 	dev_info(&stw481x->client->dev, "VPLL:  %u.%uV %s\n",  in stw481x_startup()
128 	dev_info(&stw481x->client->dev, "VAUX:  %u.%uV %s\n",  in stw481x_startup()
132 	ret = regmap_read(stw481x->map, STW_CONF2, &val);  in stw481x_startup()
136 	dev_info(&stw481x->client->dev, "TWARN: %s threshold, %s\n",  in stw481x_startup()
140 	dev_info(&stw481x->client->dev, "VMMC: %s\n",  in stw481x_startup()
142 	dev_info(&stw481x->client->dev, "IT WAKE UP: %s\n",  in stw481x_startup()
144 	dev_info(&stw481x->client->dev, "GPO1: %s\n",  in stw481x_startup()
145 		(val & STW_CONF2_GPO1) ? "low" : "high impedance");  in stw481x_startup()
146 	dev_info(&stw481x->client->dev, "GPO2: %s\n",  in stw481x_startup()
147 		(val & STW_CONF2_GPO2) ? "low" : "high impedance");  in stw481x_startup()
149 	ret = regmap_read(stw481x->map, STW_VCORE_SLEEP, &val);  in stw481x_startup()
153 	dev_info(&stw481x->client->dev, "VCORE SLEEP: %u.%uV\n",  in stw481x_startup()
160  * MFD cells - we have one cell which is selected operation
165 		.of_compatible = "st,stw481x-vmmc",
166 		.name = "stw481x-vmmc-regulator",
167 		.id = -1,
182 	stw481x = devm_kzalloc(&client->dev, sizeof(*stw481x), GFP_KERNEL);  in stw481x_probe()
184 		return -ENOMEM;  in stw481x_probe()
187 	stw481x->client = client;  in stw481x_probe()
188 	stw481x->map = devm_regmap_init_i2c(client, &stw481x_regmap_config);  in stw481x_probe()
189 	if (IS_ERR(stw481x->map)) {  in stw481x_probe()
190 		ret = PTR_ERR(stw481x->map);  in stw481x_probe()
191 		dev_err(&client->dev, "Failed to allocate register map: %d\n",  in stw481x_probe()
198 		dev_err(&client->dev, "chip initialization failed\n");  in stw481x_probe()
209 	ret = devm_mfd_add_devices(&client->dev, 0, stw481x_cells,  in stw481x_probe()
214 	dev_info(&client->dev, "initialized STw481x device\n");  in stw481x_probe()
221  * device-tree probed driver, but it has to be here due to