1 // SPDX-License-Identifier: GPL-2.0
3  * ROHM BD9571MWV-M regulator driver
22 	/* DDR Backup Power */
23 	u8 bkup_mode_cnt_keepon;	/* from "rohm,ddr-backup-power" */
56 	ret = regmap_read(rdev->regmap, BD9571MWV_AVS_SET_MONI, &val);  in bd9571mwv_avs_get_moni_state()
72 	return regmap_write_bits(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret),  in bd9571mwv_avs_set_voltage_sel_regmap()
73 				 rdev->desc->vsel_mask, sel);  in bd9571mwv_avs_set_voltage_sel_regmap()
85 	ret = regmap_read(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret), &val);  in bd9571mwv_avs_get_voltage_sel_regmap()
89 	val &= rdev->desc->vsel_mask;  in bd9571mwv_avs_get_voltage_sel_regmap()
90 	val >>= ffs(rdev->desc->vsel_mask) - 1;  in bd9571mwv_avs_get_voltage_sel_regmap()
98 	return regmap_write_bits(rdev->regmap, BD9571MWV_DVFS_SETVID,  in bd9571mwv_reg_set_voltage_sel_regmap()
99 				 rdev->desc->vsel_mask, sel);  in bd9571mwv_reg_set_voltage_sel_regmap()
144 	ret = regmap_read(bd->regmap, BD9571MWV_BKUP_MODE_CNT, mode);  in bd9571mwv_bkup_mode_read()
146 		dev_err(bd->dev, "failed to read backup mode (%d)\n", ret);  in bd9571mwv_bkup_mode_read()
157 	ret = regmap_write(bd->regmap, BD9571MWV_BKUP_MODE_CNT, mode);  in bd9571mwv_bkup_mode_write()
159 		dev_err(bd->dev, "failed to configure backup mode 0x%x (%d)\n",  in bd9571mwv_bkup_mode_write()
172 	return sprintf(buf, "%s\n", bdreg->bkup_mode_enabled ? "on" : "off");  in backup_mode_show()
186 	ret = kstrtobool(buf, &bdreg->bkup_mode_enabled);  in backup_mode_store()
190 	if (!bdreg->rstbmode_level)  in backup_mode_store()
194 	 * Configure DDR Backup Mode, to change the role of the accessory power  in backup_mode_store()
195 	 * switch from a power switch to a wake-up switch, or vice versa  in backup_mode_store()
197 	ret = bd9571mwv_bkup_mode_read(bdreg->bd, &mode);  in backup_mode_store()
202 	if (bdreg->bkup_mode_enabled)  in backup_mode_store()
203 		mode |= bdreg->bkup_mode_cnt_keepon;  in backup_mode_store()
205 	ret = bd9571mwv_bkup_mode_write(bdreg->bd, mode);  in backup_mode_store()
220 	if (!bdreg->bkup_mode_enabled)  in bd9571mwv_suspend()
223 	/* Save DDR Backup Mode */  in bd9571mwv_suspend()
224 	ret = bd9571mwv_bkup_mode_read(bdreg->bd, &mode);  in bd9571mwv_suspend()
228 	bdreg->bkup_mode_cnt_saved = mode;  in bd9571mwv_suspend()
230 	if (!bdreg->rstbmode_pulse)  in bd9571mwv_suspend()
233 	/* Enable DDR Backup Mode */  in bd9571mwv_suspend()
235 	mode |= bdreg->bkup_mode_cnt_keepon;  in bd9571mwv_suspend()
237 	if (mode != bdreg->bkup_mode_cnt_saved)  in bd9571mwv_suspend()
238 		return bd9571mwv_bkup_mode_write(bdreg->bd, mode);  in bd9571mwv_suspend()
247 	if (!bdreg->bkup_mode_enabled)  in bd9571mwv_resume()
250 	/* Restore DDR Backup Mode */  in bd9571mwv_resume()
251 	return bd9571mwv_bkup_mode_write(bdreg->bd, bdreg->bkup_mode_cnt_saved);  in bd9571mwv_resume()
260 	device_remove_file(&pdev->dev, &dev_attr_backup_mode);  in bd9571mwv_regulator_remove()
271 	struct bd9571mwv *bd = dev_get_drvdata(pdev->dev.parent);  in bd9571mwv_regulator_probe()
272 	struct regulator_config config = { };  in bd9571mwv_regulator_probe()  local
278 	bdreg = devm_kzalloc(&pdev->dev, sizeof(*bdreg), GFP_KERNEL);  in bd9571mwv_regulator_probe()
280 		return -ENOMEM;  in bd9571mwv_regulator_probe()
282 	bdreg->bd = bd;  in bd9571mwv_regulator_probe()
286 	config.dev = &pdev->dev;  in bd9571mwv_regulator_probe()
287 	config.dev->of_node = bd->dev->of_node;  in bd9571mwv_regulator_probe()
288 	config.driver_data = bd;  in bd9571mwv_regulator_probe()
289 	config.regmap = bd->regmap;  in bd9571mwv_regulator_probe()
292 		rdev = devm_regulator_register(&pdev->dev, &regulators[i],  in bd9571mwv_regulator_probe()
293 					       &config);  in bd9571mwv_regulator_probe()
295 			dev_err(bd->dev, "failed to register %s regulator\n",  in bd9571mwv_regulator_probe()
296 				pdev->name);  in bd9571mwv_regulator_probe()
302 	of_property_read_u32(bd->dev->of_node, "rohm,ddr-backup-power", &val);  in bd9571mwv_regulator_probe()
304 		dev_err(bd->dev, "invalid %s mode %u\n",  in bd9571mwv_regulator_probe()
305 			"rohm,ddr-backup-power", val);  in bd9571mwv_regulator_probe()
306 		return -EINVAL;  in bd9571mwv_regulator_probe()
308 	bdreg->bkup_mode_cnt_keepon = val;  in bd9571mwv_regulator_probe()
310 	bdreg->rstbmode_level = of_property_read_bool(bd->dev->of_node,  in bd9571mwv_regulator_probe()
311 						      "rohm,rstbmode-level");  in bd9571mwv_regulator_probe()
312 	bdreg->rstbmode_pulse = of_property_read_bool(bd->dev->of_node,  in bd9571mwv_regulator_probe()
313 						      "rohm,rstbmode-pulse");  in bd9571mwv_regulator_probe()
314 	if (bdreg->rstbmode_level && bdreg->rstbmode_pulse) {  in bd9571mwv_regulator_probe()
315 		dev_err(bd->dev, "only one rohm,rstbmode-* may be specified");  in bd9571mwv_regulator_probe()
316 		return -EINVAL;  in bd9571mwv_regulator_probe()
320 	if (bdreg->bkup_mode_cnt_keepon) {  in bd9571mwv_regulator_probe()
327 		bdreg->bkup_mode_enabled = bdreg->rstbmode_pulse;  in bd9571mwv_regulator_probe()
329 		ret = device_create_file(&pdev->dev, &dev_attr_backup_mode);  in bd9571mwv_regulator_probe()
339 	{ "bd9571mwv-regulator", },
346 		.name = "bd9571mwv-regulator",