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rockchip; rk3399: disable SRAM security region
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1/*
2 * Copyright (C) 2015 Google, Inc
3 * Written by Simon Glass <[email protected]>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#include <common.h>
9#include <dm.h>
10#include <errno.h>
11#include <fdtdec.h>
12#include <libfdt.h>
13#include <power/rk8xx_pmic.h>
14#include <power/pmic.h>
15
16DECLARE_GLOBAL_DATA_PTR;
17
18static 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"},
22 { },
23};
24
25static int rk8xx_reg_count(struct udevice *dev)
26{
27 return RK808_NUM_OF_REGS;
28}
29
30static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff,
31 int len)
32{
33 int ret;
34
35 ret = dm_i2c_write(dev, reg, buff, len);
36 if (ret) {
37 debug("write error to device: %p register: %#x!", dev, reg);
38 return ret;
39 }
40
41 return 0;
42}
43
44static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
45{
46 int ret;
47
48 ret = dm_i2c_read(dev, reg, buff, len);
49 if (ret) {
50 debug("read error from device: %p register: %#x!", dev, reg);
51 return ret;
52 }
53
54 return 0;
55}
56
57#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
58static int rk8xx_bind(struct udevice *dev)
59{
60 ofnode regulators_node;
61 int children;
62
63 regulators_node = dev_read_subnode(dev, "regulators");
64 if (!ofnode_valid(regulators_node)) {
65 debug("%s: %s regulators subnode not found!", __func__,
66 dev->name);
67 return -ENXIO;
68 }
69
70 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
71
72 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
73 if (!children)
74 debug("%s: %s - no child found\n", __func__, dev->name);
75
76 /* Always return success for this device */
77 return 0;
78}
79#endif
80
81static int rk8xx_probe(struct udevice *dev)
82{
83 struct rk8xx_priv *priv = dev_get_priv(dev);
84 uint8_t msb, lsb;
85
86 /* read Chip variant */
87 rk8xx_read(dev, ID_MSB, &msb, 1);
88 rk8xx_read(dev, ID_LSB, &lsb, 1);
89
90 priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
91
92 return 0;
93}
94
95static struct dm_pmic_ops rk8xx_ops = {
96 .reg_count = rk8xx_reg_count,
97 .read = rk8xx_read,
98 .write = rk8xx_write,
99};
100
101static const struct udevice_id rk8xx_ids[] = {
102 { .compatible = "rockchip,rk808" },
103 { .compatible = "rockchip,rk818" },
104 { }
105};
106
107U_BOOT_DRIVER(pmic_rk8xx) = {
108 .name = "rk8xx pmic",
109 .id = UCLASS_PMIC,
110 .of_match = rk8xx_ids,
111#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
112 .bind = rk8xx_bind,
113#endif
114 .probe = rk8xx_probe,
115 .ops = &rk8xx_ops,
116};
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