1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
11 #include <power/rk8xx_pmic.h>
12 #include <power/pmic.h>
14 static struct reg_data rk817_init_reg[] = {
15 /* enable the under-voltage protection,
16 * the under-voltage protection will shutdown the LDO3 and reset the PMIC
18 { RK817_BUCK4_CMIN, 0x60, 0x60},
21 static const struct pmic_child_info pmic_children_info[] = {
22 { .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
23 { .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
24 { .prefix = "SWITCH_REG", .driver = "rk8xx_switch"},
28 static int rk8xx_reg_count(struct udevice *dev)
30 return RK808_NUM_OF_REGS;
33 static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff,
38 ret = dm_i2c_write(dev, reg, buff, len);
40 debug("write error to device: %p register: %#x!\n", dev, reg);
47 static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
51 ret = dm_i2c_read(dev, reg, buff, len);
53 debug("read error from device: %p register: %#x!\n", dev, reg);
60 #if CONFIG_IS_ENABLED(PMIC_CHILDREN)
61 static int rk8xx_bind(struct udevice *dev)
63 ofnode regulators_node;
66 regulators_node = dev_read_subnode(dev, "regulators");
67 if (!ofnode_valid(regulators_node)) {
68 debug("%s: %s regulators subnode not found!\n", __func__,
73 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
75 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
77 debug("%s: %s - no child found\n", __func__, dev->name);
79 /* Always return success for this device */
84 static int rk8xx_probe(struct udevice *dev)
86 struct rk8xx_priv *priv = dev_get_priv(dev);
87 struct reg_data *init_data = NULL;
88 int init_data_num = 0;
89 int ret = 0, i, show_variant;
90 u8 msb, lsb, id_msb, id_lsb;
91 u8 on_source = 0, off_source = 0;
92 u8 power_en0, power_en1, power_en2, power_en3;
95 /* read Chip variant */
96 if (device_is_compatible(dev, "rockchip,rk817") ||
97 device_is_compatible(dev, "rockchip,rk809")) {
98 id_msb = RK817_ID_MSB;
99 id_lsb = RK817_ID_LSB;
105 ret = rk8xx_read(dev, id_msb, &msb, 1);
108 ret = rk8xx_read(dev, id_lsb, &lsb, 1);
112 priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
113 show_variant = priv->variant;
114 switch (priv->variant) {
116 show_variant = 0x808; /* RK808 hardware ID is 0 */
121 on_source = RK8XX_ON_SOURCE;
122 off_source = RK8XX_OFF_SOURCE;
126 on_source = RK817_ON_SOURCE;
127 off_source = RK817_OFF_SOURCE;
128 init_data = rk817_init_reg;
129 init_data_num = ARRAY_SIZE(rk817_init_reg);
130 power_en0 = pmic_reg_read(dev, RK817_POWER_EN0);
131 power_en1 = pmic_reg_read(dev, RK817_POWER_EN1);
132 power_en2 = pmic_reg_read(dev, RK817_POWER_EN2);
133 power_en3 = pmic_reg_read(dev, RK817_POWER_EN3);
135 value = (power_en0 & 0x0f) | ((power_en1 & 0x0f) << 4);
136 pmic_reg_write(dev, RK817_POWER_EN_SAVE0, value);
137 value = (power_en2 & 0x0f) | ((power_en3 & 0x0f) << 4);
138 pmic_reg_write(dev, RK817_POWER_EN_SAVE1, value);
141 printf("Unknown PMIC: RK%x!!\n", priv->variant);
145 for (i = 0; i < init_data_num; i++) {
146 ret = pmic_clrsetbits(dev,
151 printf("%s: i2c set reg 0x%x failed, ret=%d\n",
152 __func__, init_data[i].reg, ret);
155 debug("%s: reg[0x%x] = 0x%x\n", __func__, init_data[i].reg,
156 pmic_reg_read(dev, init_data[i].reg));
159 printf("PMIC: RK%x ", show_variant);
161 if (on_source && off_source)
162 printf("(on=0x%02x, off=0x%02x)",
163 pmic_reg_read(dev, on_source),
164 pmic_reg_read(dev, off_source));
170 static struct dm_pmic_ops rk8xx_ops = {
171 .reg_count = rk8xx_reg_count,
173 .write = rk8xx_write,
176 static const struct udevice_id rk8xx_ids[] = {
177 { .compatible = "rockchip,rk805" },
178 { .compatible = "rockchip,rk808" },
179 { .compatible = "rockchip,rk809" },
180 { .compatible = "rockchip,rk816" },
181 { .compatible = "rockchip,rk817" },
182 { .compatible = "rockchip,rk818" },
186 U_BOOT_DRIVER(pmic_rk8xx) = {
187 .name = "rk8xx pmic",
189 .of_match = rk8xx_ids,
190 #if CONFIG_IS_ENABLED(PMIC_CHILDREN)
193 .priv_auto_alloc_size = sizeof(struct rk8xx_priv),
194 .probe = rk8xx_probe,