2 * Copyright (C) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
13 #include <power/rk8xx_pmic.h>
14 #include <power/pmic.h>
16 DECLARE_GLOBAL_DATA_PTR;
18 static const struct pmic_child_info pmic_children_info[] = {
19 { .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
20 { .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
21 { .prefix = "SWITCH_REG", .driver = "rk8xx_switch"},
25 static int rk8xx_reg_count(struct udevice *dev)
27 return RK808_NUM_OF_REGS;
30 static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff,
35 ret = dm_i2c_write(dev, reg, buff, len);
37 debug("write error to device: %p register: %#x!", dev, reg);
44 static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
48 ret = dm_i2c_read(dev, reg, buff, len);
50 debug("read error from device: %p register: %#x!", dev, reg);
57 #if CONFIG_IS_ENABLED(PMIC_CHILDREN)
58 static int rk8xx_bind(struct udevice *dev)
60 const void *blob = gd->fdt_blob;
64 regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
66 if (regulators_node <= 0) {
67 debug("%s: %s regulators subnode not found!", __func__,
72 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
74 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
76 debug("%s: %s - no child found\n", __func__, dev->name);
78 /* Always return success for this device */
83 static int rk8xx_probe(struct udevice *dev)
85 struct rk8xx_priv *priv = dev_get_priv(dev);
88 /* read Chip variant */
89 rk8xx_read(dev, ID_MSB, &msb, 1);
90 rk8xx_read(dev, ID_LSB, &lsb, 1);
92 priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
97 static struct dm_pmic_ops rk8xx_ops = {
98 .reg_count = rk8xx_reg_count,
100 .write = rk8xx_write,
103 static const struct udevice_id rk8xx_ids[] = {
104 { .compatible = "rockchip,rk808" },
105 { .compatible = "rockchip,rk818" },
109 U_BOOT_DRIVER(pmic_rk8xx) = {
110 .name = "rk8xx pmic",
112 .of_match = rk8xx_ids,
113 #if CONFIG_IS_ENABLED(PMIC_CHILDREN)
116 .probe = rk8xx_probe,