1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <errno.h>
10 #include <power/rk8xx_pmic.h>
11 #include <power/pmic.h>
12
13 static struct reg_data rk817_init_reg[] = {
14 /* enable the under-voltage protection,
15 * the under-voltage protection will shutdown the LDO3 and reset the PMIC
16 */
17 { RK817_BUCK4_CMIN, 0x60, 0x60},
18 };
19
20 static const struct pmic_child_info pmic_children_info[] = {
21 { .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
22 { .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
23 { .prefix = "SWITCH_REG", .driver = "rk8xx_switch"},
24 { },
25 };
26
rk8xx_reg_count(struct udevice * dev)27 static int rk8xx_reg_count(struct udevice *dev)
28 {
29 return RK808_NUM_OF_REGS;
30 }
31
rk8xx_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)32 static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff,
33 int len)
34 {
35 int ret;
36
37 ret = dm_i2c_write(dev, reg, buff, len);
38 if (ret) {
39 debug("write error to device: %p register: %#x!\n", dev, reg);
40 return ret;
41 }
42
43 return 0;
44 }
45
rk8xx_read(struct udevice * dev,uint reg,uint8_t * buff,int len)46 static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
47 {
48 int ret;
49
50 ret = dm_i2c_read(dev, reg, buff, len);
51 if (ret) {
52 debug("read error from device: %p register: %#x!\n", dev, reg);
53 return ret;
54 }
55
56 return 0;
57 }
58
59 #if CONFIG_IS_ENABLED(PMIC_CHILDREN)
rk8xx_bind(struct udevice * dev)60 static int rk8xx_bind(struct udevice *dev)
61 {
62 ofnode regulators_node;
63 int children;
64
65 regulators_node = dev_read_subnode(dev, "regulators");
66 if (!ofnode_valid(regulators_node)) {
67 debug("%s: %s regulators subnode not found!\n", __func__,
68 dev->name);
69 return -ENXIO;
70 }
71
72 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
73
74 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
75 if (!children)
76 debug("%s: %s - no child found\n", __func__, dev->name);
77
78 /* Always return success for this device */
79 return 0;
80 }
81 #endif
82
rk8xx_probe(struct udevice * dev)83 static int rk8xx_probe(struct udevice *dev)
84 {
85 struct rk8xx_priv *priv = dev_get_priv(dev);
86 struct reg_data *init_data = NULL;
87 int init_data_num = 0;
88 int ret = 0, i, show_variant;
89 u8 msb, lsb, id_msb, id_lsb;
90 u8 on_source = 0, off_source = 0;
91 u8 power_en0, power_en1, power_en2, power_en3;
92 u8 value;
93
94 /* read Chip variant */
95 if (device_is_compatible(dev, "rockchip,rk817") ||
96 device_is_compatible(dev, "rockchip,rk809")) {
97 id_msb = RK817_ID_MSB;
98 id_lsb = RK817_ID_LSB;
99 } else {
100 id_msb = ID_MSB;
101 id_lsb = ID_LSB;
102 }
103
104 ret = rk8xx_read(dev, id_msb, &msb, 1);
105 if (ret)
106 return ret;
107 ret = rk8xx_read(dev, id_lsb, &lsb, 1);
108 if (ret)
109 return ret;
110
111 priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
112 show_variant = priv->variant;
113 switch (priv->variant) {
114 case RK808_ID:
115 show_variant = 0x808; /* RK808 hardware ID is 0 */
116 break;
117 case RK805_ID:
118 case RK816_ID:
119 case RK818_ID:
120 on_source = RK8XX_ON_SOURCE;
121 off_source = RK8XX_OFF_SOURCE;
122 break;
123 case RK809_ID:
124 case RK817_ID:
125 on_source = RK817_ON_SOURCE;
126 off_source = RK817_OFF_SOURCE;
127 init_data = rk817_init_reg;
128 init_data_num = ARRAY_SIZE(rk817_init_reg);
129 power_en0 = pmic_reg_read(dev, RK817_POWER_EN0);
130 power_en1 = pmic_reg_read(dev, RK817_POWER_EN1);
131 power_en2 = pmic_reg_read(dev, RK817_POWER_EN2);
132 power_en3 = pmic_reg_read(dev, RK817_POWER_EN3);
133
134 value = (power_en0 & 0x0f) | ((power_en1 & 0x0f) << 4);
135 pmic_reg_write(dev, RK817_POWER_EN_SAVE0, value);
136 value = (power_en2 & 0x0f) | ((power_en3 & 0x0f) << 4);
137 pmic_reg_write(dev, RK817_POWER_EN_SAVE1, value);
138 break;
139 default:
140 printf("Unknown PMIC: RK%x!!\n", priv->variant);
141 return -EINVAL;
142 }
143
144 for (i = 0; i < init_data_num; i++) {
145 ret = pmic_clrsetbits(dev,
146 init_data[i].reg,
147 init_data[i].mask,
148 init_data[i].val);
149 if (ret < 0) {
150 printf("%s: i2c set reg 0x%x failed, ret=%d\n",
151 __func__, init_data[i].reg, ret);
152 }
153
154 debug("%s: reg[0x%x] = 0x%x\n", __func__, init_data[i].reg,
155 pmic_reg_read(dev, init_data[i].reg));
156 }
157
158 printf("PMIC: RK%x ", show_variant);
159
160 if (on_source && off_source)
161 printf("(on=0x%02x, off=0x%02x)",
162 pmic_reg_read(dev, on_source),
163 pmic_reg_read(dev, off_source));
164 printf("\n");
165
166 return 0;
167 }
168
169 static struct dm_pmic_ops rk8xx_ops = {
170 .reg_count = rk8xx_reg_count,
171 .read = rk8xx_read,
172 .write = rk8xx_write,
173 };
174
175 static const struct udevice_id rk8xx_ids[] = {
176 { .compatible = "rockchip,rk805" },
177 { .compatible = "rockchip,rk808" },
178 { .compatible = "rockchip,rk809" },
179 { .compatible = "rockchip,rk816" },
180 { .compatible = "rockchip,rk817" },
181 { .compatible = "rockchip,rk818" },
182 { }
183 };
184
185 U_BOOT_DRIVER(pmic_rk8xx) = {
186 .name = "rk8xx pmic",
187 .id = UCLASS_PMIC,
188 .of_match = rk8xx_ids,
189 #if CONFIG_IS_ENABLED(PMIC_CHILDREN)
190 .bind = rk8xx_bind,
191 #endif
192 .priv_auto_alloc_size = sizeof(struct rk8xx_priv),
193 .probe = rk8xx_probe,
194 .ops = &rk8xx_ops,
195 };
196