1 /* SPDX-License-Identifier: GPL-2.0-only */
4 #include <console/console.h>
6 #include <device/i2c_simple.h>
13 AS3722_I2C_ADDR
= 0x40
16 struct as3722_init_reg
{
22 static struct as3722_init_reg init_list
[] = {
23 {AS3722_SDO0
, 0x3C, 1},
24 {AS3722_SDO1
, 0x32, 0},
25 {AS3722_LDO3
, 0x59, 0},
26 {AS3722_SDO2
, 0x3C, 0},
27 {AS3722_SDO3
, 0x00, 0},
28 {AS3722_SDO4
, 0x00, 0},
29 {AS3722_SDO5
, 0x50, 0},
30 {AS3722_SDO6
, 0x28, 1},
31 {AS3722_LDO0
, 0x8A, 0},
32 {AS3722_LDO1
, 0x00, 0},
33 {AS3722_LDO2
, 0x10, 0},
34 {AS3722_LDO4
, 0x00, 0},
35 {AS3722_LDO5
, 0x00, 0},
36 {AS3722_LDO6
, 0x00, 0},
37 {AS3722_LDO7
, 0x00, 0},
38 {AS3722_LDO9
, 0x00, 0},
39 {AS3722_LDO10
, 0x00, 0},
40 {AS3722_LDO11
, 0x00, 1},
43 static void pmic_write_reg(unsigned int bus
, uint8_t reg
, uint8_t val
, int do_delay
)
45 if (i2c_writeb(bus
, AS3722_I2C_ADDR
, reg
, val
)) {
46 printk(BIOS_ERR
, "%s: reg = 0x%02X, value = 0x%02X failed!\n",
48 /* Reset the SoC on any PMIC write error */
56 static void pmic_slam_defaults(unsigned int bus
)
59 for (i
= 0; i
< ARRAY_SIZE(init_list
); i
++) {
60 struct as3722_init_reg
*reg
= &init_list
[i
];
61 pmic_write_reg(bus
, reg
->reg
, reg
->val
, reg
->delay
);
65 void pmic_init(unsigned int bus
)
68 * Don't need to set up VDD_CORE - already done - by OTP
69 * Don't write SDCONTROL - it's already 0x7F, i.e. all SDs enabled.
70 * Don't write LDCONTROL - it's already 0xFF, i.e. all LDOs enabled.
73 /* Restore PMIC POR defaults, in case kernel changed 'em */
74 pmic_slam_defaults(bus
);
76 /* First set VDD_CPU to 1.2V, then enable the VDD_CPU regulator. */
78 pmic_write_reg(bus
, 0x00, 0x3c, 1);
80 pmic_write_reg(bus
, 0x00, 0x50, 1);
82 /* First set VDD_GPU to 1.0V, then enable the VDD_GPU regulator. */
83 pmic_write_reg(bus
, 0x06, 0x28, 1);
86 * First set +1.2V_GEN_AVDD to 1.2V, then enable the +1.2V_GEN_AVDD
89 pmic_write_reg(bus
, 0x12, 0x10, 1);
92 * Panel power GPIO O4. Set mode for GPIO4 (0x0c to 7), then set
93 * the value (register 0x20 bit 4)
95 pmic_write_reg(bus
, 0x0c, 0x07, 0);
96 pmic_write_reg(bus
, 0x20, 0x10, 1);