1 // SPDX-License-Identifier: GPL-2.0-only
26  * - If the voltage on a rail is above the "1.8" voltage (1.98V) we'll tell the
28  * - If the voltage on a rail is above the "3.3" voltage (3.6V) we'll consider
75 	int (*write)(struct rockchip_iodomain_supply *supply, int uV);
83 	int (*write)(struct rockchip_iodomain_supply *supply, int uV);
86 static int rk3568_iodomain_write(struct rockchip_iodomain_supply *supply, int uV)  in rk3568_iodomain_write()  argument
88 	struct rockchip_iodomain *iod = supply->iod;  in rk3568_iodomain_write()
93 	switch (supply->idx) {  in rk3568_iodomain_write()
97 		b = supply->idx;  in rk3568_iodomain_write()
99 		b = supply->idx + 4;  in rk3568_iodomain_write()
102 		regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL2, val0);  in rk3568_iodomain_write()
103 		regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL2, val1);  in rk3568_iodomain_write()
113 		b = supply->idx - 1;  in rk3568_iodomain_write()
117 		regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL0, val0);  in rk3568_iodomain_write()
118 		regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL1, val1);  in rk3568_iodomain_write()
121 		return -EINVAL;  in rk3568_iodomain_write()
127 static int rockchip_iodomain_write(struct rockchip_iodomain_supply *supply,  in rockchip_iodomain_write()  argument
130 	struct rockchip_iodomain *iod = supply->iod;  in rockchip_iodomain_write()
136 	val <<= supply->idx;  in rockchip_iodomain_write()
138 	/* apply hiword-mask */  in rockchip_iodomain_write()
139 	val |= (BIT(supply->idx) << 16);  in rockchip_iodomain_write()
141 	ret = regmap_write(iod->grf, iod->soc_data->grf_offset, val);  in rockchip_iodomain_write()
143 		dev_err(iod->dev, "Couldn't write to GRF\n");  in rockchip_iodomain_write()
152 	struct rockchip_iodomain_supply *supply =  in rockchip_iodomain_notify()  local
173 		uV = max_t(unsigned long, pvc_data->old_uV, pvc_data->max_uV);  in rockchip_iodomain_notify()
181 	dev_dbg(supply->iod->dev, "Setting to %d\n", uV);  in rockchip_iodomain_notify()
184 		dev_err(supply->iod->dev, "Voltage too high: %d\n", uV);  in rockchip_iodomain_notify()
190 	ret = supply->iod->write(supply, uV);  in rockchip_iodomain_notify()
194 	dev_dbg(supply->iod->dev, "Setting to %d done\n", uV);  in rockchip_iodomain_notify()
203 	/* if no VCCIO6 supply we should leave things alone */  in px30_iodomain_init()
204 	if (!iod->supplies[PX30_IO_VSEL_VCCIO6_SUPPLY_NUM].reg)  in px30_iodomain_init()
212 	ret = regmap_write(iod->grf, PX30_IO_VSEL, val);  in px30_iodomain_init()
214 		dev_warn(iod->dev, "couldn't update vccio6 ctrl\n");  in px30_iodomain_init()
222 	/* if no flash supply we should leave things alone */  in rk3288_iodomain_init()
223 	if (!iod->supplies[RK3288_SOC_FLASH_SUPPLY_NUM].reg)  in rk3288_iodomain_init()
231 	ret = regmap_write(iod->grf, RK3288_SOC_CON2, val);  in rk3288_iodomain_init()
233 		dev_warn(iod->dev, "couldn't update flash0 ctrl\n");  in rk3288_iodomain_init()
241 	/* if no vccio3 supply we should leave things alone */  in rk3308_iodomain_init()
242 	if (!iod->supplies[RK3308_SOC_VCCIO3_SUPPLY_NUM].reg)  in rk3308_iodomain_init()
250 	ret = regmap_write(iod->grf, RK3308_SOC_CON0, val);  in rk3308_iodomain_init()
252 		dev_warn(iod->dev, "couldn't update vccio3 vsel ctrl\n");  in rk3308_iodomain_init()
260 	/* if no vccio2 supply we should leave things alone */  in rk3328_iodomain_init()
261 	if (!iod->supplies[RK3328_SOC_VCCIO2_SUPPLY_NUM].reg)  in rk3328_iodomain_init()
269 	ret = regmap_write(iod->grf, RK3328_SOC_CON4, val);  in rk3328_iodomain_init()
271 		dev_warn(iod->dev, "couldn't update vccio2 vsel ctrl\n");  in rk3328_iodomain_init()
279 	/* if no flash supply we should leave things alone */  in rk3368_iodomain_init()
280 	if (!iod->supplies[RK3368_SOC_FLASH_SUPPLY_NUM].reg)  in rk3368_iodomain_init()
288 	ret = regmap_write(iod->grf, RK3368_SOC_CON15, val);  in rk3368_iodomain_init()
290 		dev_warn(iod->dev, "couldn't update flash0 ctrl\n");  in rk3368_iodomain_init()
298 	/* if no pmu io supply we should leave things alone */  in rk3399_pmu_iodomain_init()
299 	if (!iod->supplies[RK3399_PMUGRF_VSEL_SUPPLY_NUM].reg)  in rk3399_pmu_iodomain_init()
307 	ret = regmap_write(iod->grf, RK3399_PMUGRF_CON0, val);  in rk3399_pmu_iodomain_init()
309 		dev_warn(iod->dev, "couldn't update pmu io iodomain ctrl\n");  in rk3399_pmu_iodomain_init()
322 		"vccio-oscgpi",
350  * On the rk3188 the io-domains are handled by a shared register with the
351  * lower 8 bits being still being continuing drive-strength settings.
393 		"bb",		/* APIO5_VDD */
548 		.compatible = "rockchip,px30-io-voltage-domain",
552 		.compatible = "rockchip,px30-pmu-io-voltage-domain",
556 		.compatible = "rockchip,rk3188-io-voltage-domain",
560 		.compatible = "rockchip,rk3228-io-voltage-domain",
564 		.compatible = "rockchip,rk3288-io-voltage-domain",
568 		.compatible = "rockchip,rk3308-io-voltage-domain",
572 		.compatible = "rockchip,rk3328-io-voltage-domain",
576 		.compatible = "rockchip,rk3368-io-voltage-domain",
580 		.compatible = "rockchip,rk3368-pmu-io-voltage-domain",
584 		.compatible = "rockchip,rk3399-io-voltage-domain",
588 		.compatible = "rockchip,rk3399-pmu-io-voltage-domain",
592 		.compatible = "rockchip,rk3568-pmu-io-voltage-domain",
596 		.compatible = "rockchip,rv1108-io-voltage-domain",
600 		.compatible = "rockchip,rv1108-pmu-io-voltage-domain",
604 		.compatible = "rockchip,rv1126-pmu-io-voltage-domain",
613 	struct device_node *np = pdev->dev.of_node;  in rockchip_iodomain_probe()
620 		return -ENODEV;  in rockchip_iodomain_probe()
622 	iod = devm_kzalloc(&pdev->dev, sizeof(*iod), GFP_KERNEL);  in rockchip_iodomain_probe()
624 		return -ENOMEM;  in rockchip_iodomain_probe()
626 	iod->dev = &pdev->dev;  in rockchip_iodomain_probe()
630 	iod->soc_data = match->data;  in rockchip_iodomain_probe()
632 	if (iod->soc_data->write)  in rockchip_iodomain_probe()
633 		iod->write = iod->soc_data->write;  in rockchip_iodomain_probe()
635 		iod->write = rockchip_iodomain_write;  in rockchip_iodomain_probe()
637 	parent = pdev->dev.parent;  in rockchip_iodomain_probe()
638 	if (parent && parent->of_node) {  in rockchip_iodomain_probe()
639 		iod->grf = syscon_node_to_regmap(parent->of_node);  in rockchip_iodomain_probe()
641 		dev_dbg(&pdev->dev, "falling back to old binding\n");  in rockchip_iodomain_probe()
642 		iod->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");  in rockchip_iodomain_probe()
645 	if (IS_ERR(iod->grf)) {  in rockchip_iodomain_probe()
646 		dev_err(&pdev->dev, "couldn't find grf regmap\n");  in rockchip_iodomain_probe()
647 		return PTR_ERR(iod->grf);  in rockchip_iodomain_probe()
651 		const char *supply_name = iod->soc_data->supply_names[i];  in rockchip_iodomain_probe()
652 		struct rockchip_iodomain_supply *supply = &iod->supplies[i];  in rockchip_iodomain_probe()  local
659 		reg = devm_regulator_get_optional(iod->dev, supply_name);  in rockchip_iodomain_probe()
663 			/* If a supply wasn't specified, that's OK */  in rockchip_iodomain_probe()
664 			if (ret == -ENODEV)  in rockchip_iodomain_probe()
666 			else if (ret != -EPROBE_DEFER)  in rockchip_iodomain_probe()
667 				dev_err(iod->dev, "couldn't get regulator %s\n",  in rockchip_iodomain_probe()
677 			dev_err(iod->dev, "Can't determine voltage: %s\n",  in rockchip_iodomain_probe()
684 			dev_crit(iod->dev,  in rockchip_iodomain_probe()
687 			ret = -EINVAL;  in rockchip_iodomain_probe()
691 		/* setup our supply */  in rockchip_iodomain_probe()
692 		supply->idx = i;  in rockchip_iodomain_probe()
693 		supply->iod = iod;  in rockchip_iodomain_probe()
694 		supply->reg = reg;  in rockchip_iodomain_probe()
695 		supply->nb.notifier_call = rockchip_iodomain_notify;  in rockchip_iodomain_probe()
697 		ret = iod->write(supply, uV);  in rockchip_iodomain_probe()
699 			supply->reg = NULL;  in rockchip_iodomain_probe()
704 		ret = regulator_register_notifier(reg, &supply->nb);  in rockchip_iodomain_probe()
706 			dev_err(&pdev->dev,  in rockchip_iodomain_probe()
708 			supply->reg = NULL;  in rockchip_iodomain_probe()
713 	if (iod->soc_data->init)  in rockchip_iodomain_probe()
714 		iod->soc_data->init(iod);  in rockchip_iodomain_probe()
719 	for (i = MAX_SUPPLIES - 1; i >= 0; i--) {  in rockchip_iodomain_probe()
720 		struct rockchip_iodomain_supply *io_supply = &iod->supplies[i];  in rockchip_iodomain_probe()
722 		if (io_supply->reg)  in rockchip_iodomain_probe()
723 			regulator_unregister_notifier(io_supply->reg,  in rockchip_iodomain_probe()
724 						      &io_supply->nb);  in rockchip_iodomain_probe()
735 	for (i = MAX_SUPPLIES - 1; i >= 0; i--) {  in rockchip_iodomain_remove()
736 		struct rockchip_iodomain_supply *io_supply = &iod->supplies[i];  in rockchip_iodomain_remove()
738 		if (io_supply->reg)  in rockchip_iodomain_remove()
739 			regulator_unregister_notifier(io_supply->reg,  in rockchip_iodomain_remove()
740 						      &io_supply->nb);  in rockchip_iodomain_remove()
748 		.name = "rockchip-iodomain",
755 MODULE_DESCRIPTION("Rockchip IO-domain driver");