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[u-boot] / board / freescale / common / pfuze.c
1 /*
2  * Copyright 2014 Freescale Semiconductor, Inc.
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6
7 #include <common.h>
8 #include <errno.h>
9 #include <power/pmic.h>
10 #include <power/pfuze100_pmic.h>
11
12 #ifndef CONFIG_DM_PMIC_PFUZE100
13 int pfuze_mode_init(struct pmic *p, u32 mode)
14 {
15         unsigned char offset, i, switch_num;
16         u32 id;
17         int ret;
18
19         pmic_reg_read(p, PFUZE100_DEVICEID, &id);
20         id = id & 0xf;
21
22         if (id == 0) {
23                 switch_num = 6;
24                 offset = PFUZE100_SW1CMODE;
25         } else if (id == 1) {
26                 switch_num = 4;
27                 offset = PFUZE100_SW2MODE;
28         } else {
29                 printf("Not supported, id=%d\n", id);
30                 return -EINVAL;
31         }
32
33         ret = pmic_reg_write(p, PFUZE100_SW1ABMODE, mode);
34         if (ret < 0) {
35                 printf("Set SW1AB mode error!\n");
36                 return ret;
37         }
38
39         for (i = 0; i < switch_num - 1; i++) {
40                 ret = pmic_reg_write(p, offset + i * SWITCH_SIZE, mode);
41                 if (ret < 0) {
42                         printf("Set switch 0x%x mode error!\n",
43                                offset + i * SWITCH_SIZE);
44                         return ret;
45                 }
46         }
47
48         return ret;
49 }
50
51 struct pmic *pfuze_common_init(unsigned char i2cbus)
52 {
53         struct pmic *p;
54         int ret;
55         unsigned int reg;
56
57         ret = power_pfuze100_init(i2cbus);
58         if (ret)
59                 return NULL;
60
61         p = pmic_get("PFUZE100");
62         ret = pmic_probe(p);
63         if (ret)
64                 return NULL;
65
66         pmic_reg_read(p, PFUZE100_DEVICEID, &reg);
67         printf("PMIC:  PFUZE100 ID=0x%02x\n", reg);
68
69         /* Set SW1AB stanby volage to 0.975V */
70         pmic_reg_read(p, PFUZE100_SW1ABSTBY, &reg);
71         reg &= ~SW1x_STBY_MASK;
72         reg |= SW1x_0_975V;
73         pmic_reg_write(p, PFUZE100_SW1ABSTBY, reg);
74
75         /* Set SW1AB/VDDARM step ramp up time from 16us to 4us/25mV */
76         pmic_reg_read(p, PFUZE100_SW1ABCONF, &reg);
77         reg &= ~SW1xCONF_DVSSPEED_MASK;
78         reg |= SW1xCONF_DVSSPEED_4US;
79         pmic_reg_write(p, PFUZE100_SW1ABCONF, reg);
80
81         /* Set SW1C standby voltage to 0.975V */
82         pmic_reg_read(p, PFUZE100_SW1CSTBY, &reg);
83         reg &= ~SW1x_STBY_MASK;
84         reg |= SW1x_0_975V;
85         pmic_reg_write(p, PFUZE100_SW1CSTBY, reg);
86
87         /* Set SW1C/VDDSOC step ramp up time from 16us to 4us/25mV */
88         pmic_reg_read(p, PFUZE100_SW1CCONF, &reg);
89         reg &= ~SW1xCONF_DVSSPEED_MASK;
90         reg |= SW1xCONF_DVSSPEED_4US;
91         pmic_reg_write(p, PFUZE100_SW1CCONF, reg);
92
93         return p;
94 }
95 #endif