1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2017
4 * Texas Instruments Incorporated, <www.ti.com>
5 *
6 * Keerthy <j-keerthy@ti.com>
7 */
8
9#include <common.h>
10#include <fdtdec.h>
11#include <errno.h>
12#include <dm.h>
13#include <log.h>
14#include <power/pmic.h>
15#include <power/regulator.h>
16#include <power/lp87565.h>
17
18static const char lp87565_buck_ctrl1[LP87565_BUCK_NUM] = {0x2, 0x4, 0x6, 0x8, 0x2, 0x6};
19static const char lp87565_buck_vout[LP87565_BUCK_NUM] = {0xA, 0xC, 0xE, 0x10, 0xA, 0xE };
20
21static int lp87565_buck_enable(struct udevice *dev, int op, bool *enable)
22{
23	int ret;
24	unsigned int adr;
25	struct dm_regulator_uclass_plat *uc_pdata;
26
27	uc_pdata = dev_get_uclass_plat(dev);
28	adr = uc_pdata->ctrl_reg;
29
30	ret = pmic_reg_read(dev->parent, adr);
31	if (ret < 0)
32		return ret;
33
34	if (op == PMIC_OP_GET) {
35		ret &= LP87565_BUCK_MODE_MASK;
36
37		if (ret)
38			*enable = true;
39		else
40			*enable = false;
41
42		return 0;
43	} else if (op == PMIC_OP_SET) {
44		if (*enable)
45			ret |= LP87565_BUCK_MODE_MASK;
46		else
47			ret &= ~LP87565_BUCK_MODE_MASK;
48		ret = pmic_reg_write(dev->parent, adr, ret);
49		if (ret)
50			return ret;
51	}
52
53	return 0;
54}
55
56static int lp87565_buck_volt2val(int uV)
57{
58	if (uV > LP87565_BUCK_VOLT_MAX)
59		return -EINVAL;
60	else if (uV > 1400000)
61		return (uV - 1420000) / 20000 + 0x9E;
62	else if (uV > 730000)
63		return (uV - 735000) / 5000 + 0x18;
64	else if (uV >= 500000)
65		return (uV - 500000) / 10000;
66	else
67		return -EINVAL;
68}
69
70static int lp87565_buck_val2volt(int val)
71{
72	if (val > LP87565_BUCK_VOLT_MAX_HEX)
73		return -EINVAL;
74	else if (val > 0x9D)
75		return 1400000 + (val - 0x9D) * 20000;
76	else if (val > 0x17)
77		return 730000 + (val - 0x17) * 5000;
78	else if (val >= 0x0)
79		return 500000 + val * 10000;
80	else
81		return -EINVAL;
82}
83
84static int lp87565_buck_val(struct udevice *dev, int op, int *uV)
85{
86	unsigned int hex, adr;
87	int ret;
88	struct dm_regulator_uclass_plat *uc_pdata;
89
90	uc_pdata = dev_get_uclass_plat(dev);
91
92	if (op == PMIC_OP_GET)
93		*uV = 0;
94
95	adr = uc_pdata->volt_reg;
96
97	ret = pmic_reg_read(dev->parent, adr);
98	if (ret < 0)
99		return ret;
100
101	if (op == PMIC_OP_GET) {
102		ret &= LP87565_BUCK_VOLT_MASK;
103		ret = lp87565_buck_val2volt(ret);
104		if (ret < 0)
105			return ret;
106		*uV = ret;
107
108		return 0;
109	}
110
111	hex = lp87565_buck_volt2val(*uV);
112	if (hex < 0)
113		return hex;
114
115	ret &= 0x0;
116	ret = hex;
117
118	ret = pmic_reg_write(dev->parent, adr, ret);
119
120	return ret;
121}
122
123static int lp87565_buck_probe(struct udevice *dev)
124{
125	struct dm_regulator_uclass_plat *uc_pdata;
126	int idx;
127
128	uc_pdata = dev_get_uclass_plat(dev);
129	uc_pdata->type = REGULATOR_TYPE_BUCK;
130
131	idx = dev->driver_data;
132	if (idx == 0 || idx == 1 || idx == 2 || idx == 3) {
133		debug("Single phase regulator\n");
134	} else if (idx == 23) {
135		idx = 5;
136	} else if (idx == 10) {
137		idx = 4;
138	} else {
139		printf("Wrong ID for regulator\n");
140		return -EINVAL;
141	}
142
143	uc_pdata->ctrl_reg = lp87565_buck_ctrl1[idx];
144	uc_pdata->volt_reg = lp87565_buck_vout[idx];
145
146	return 0;
147}
148
149static int buck_get_value(struct udevice *dev)
150{
151	int uV;
152	int ret;
153
154	ret = lp87565_buck_val(dev, PMIC_OP_GET, &uV);
155	if (ret)
156		return ret;
157
158	return uV;
159}
160
161static int buck_set_value(struct udevice *dev, int uV)
162{
163	return lp87565_buck_val(dev, PMIC_OP_SET, &uV);
164}
165
166static int buck_get_enable(struct udevice *dev)
167{
168	bool enable = false;
169	int ret;
170
171
172	ret = lp87565_buck_enable(dev, PMIC_OP_GET, &enable);
173	if (ret)
174		return ret;
175
176	return enable;
177}
178
179static int buck_set_enable(struct udevice *dev, bool enable)
180{
181	return lp87565_buck_enable(dev, PMIC_OP_SET, &enable);
182}
183
184static const struct dm_regulator_ops lp87565_buck_ops = {
185	.get_value  = buck_get_value,
186	.set_value  = buck_set_value,
187	.get_enable = buck_get_enable,
188	.set_enable = buck_set_enable,
189};
190
191U_BOOT_DRIVER(lp87565_buck) = {
192	.name = LP87565_BUCK_DRIVER,
193	.id = UCLASS_REGULATOR,
194	.ops = &lp87565_buck_ops,
195	.probe = lp87565_buck_probe,
196};
197