2 * Copyright (C) 2014 Lothar Waßmann <LW@KARO-electronics.de>
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 as published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
23 #define RN5T618_NOETIMSET 0x11
24 #define RN5T618_LDORTC1_SLOT 0x2a
25 #define RN5T618_DC1CTL 0x2c
26 #define RN5T618_DC1CTL2 0x2d
27 #define RN5T618_DC2CTL 0x2e
28 #define RN5T618_DC2CTL2 0x2f
29 #define RN5T618_DC3CTL 0x30
30 #define RN5T618_DC3CTL2 0x31
31 #define RN5T618_DC1DAC 0x36 /* CORE */
32 #define RN5T618_DC2DAC 0x37 /* SOC */
33 #define RN5T618_DC3DAC 0x38 /* DDR */
34 #define RN5T618_DC1DAC_SLP 0x3b
35 #define RN5T618_DC2DAC_SLP 0x3c
36 #define RN5T618_DC3DAC_SLP 0x3d
37 #define RN5T618_LDOEN1 0x44
38 #define RN5T618_LDODIS 0x46
39 #define RN5T618_LDOEN2 0x48
40 #define RN5T618_LDO3DAC 0x4e /* IO */
41 #define RN5T618_LDORTCDAC 0x56 /* VBACKUP */
43 #define VDD_RTC_VAL mV_to_regval_rtc(3000)
44 #define VDD_HIGH_VAL mV_to_regval3(3000)
45 #define VDD_HIGH_VAL_LP mV_to_regval3(3000)
46 #define VDD_CORE_VAL mV_to_regval(1425) /* DCDC1 */
47 #define VDD_CORE_VAL_LP mV_to_regval(900)
48 #define VDD_SOC_VAL mV_to_regval(1425) /* DCDC2 */
49 #define VDD_SOC_VAL_LP mV_to_regval(900)
50 #define VDD_DDR_VAL mV_to_regval(1500) /* DCDC3 */
51 #define VDD_DDR_VAL_LP mV_to_regval(1500)
53 /* calculate voltages in 10mV */
54 #define v2r(v,n,m) DIV_ROUND(((((v) < (n)) ? (n) : (v)) - (n)), (m))
55 #define r2v(r,n,m) (((r) * (m) + (n)) / 10)
58 #define mV_to_regval(mV) v2r((mV) * 10, 6000, 125)
59 #define regval_to_mV(r) r2v(r, 6000, 125)
62 #define mV_to_regval2(mV) v2r((mV) * 10, 9000, 250)
63 #define regval2_to_mV(r) r2v(r, 9000, 250)
66 #define mV_to_regval3(mV) v2r((mV) * 10, 6000, 250)
67 #define regval3_to_mV(r) r2v(r, 6000, 250)
70 #define mV_to_regval_rtc(mV) v2r((mV) * 10, 17000, 250)
71 #define regval_rtc_to_mV(r) r2v(r, 17000, 250)
73 static struct rn5t618_regs {
78 { RN5T618_NOETIMSET, 0, },
79 { RN5T618_DC1DAC, VDD_CORE_VAL, },
80 { RN5T618_DC2DAC, VDD_SOC_VAL, },
81 { RN5T618_DC3DAC, VDD_DDR_VAL, },
82 { RN5T618_DC1DAC_SLP, VDD_CORE_VAL_LP, },
83 { RN5T618_DC2DAC_SLP, VDD_SOC_VAL_LP, },
84 { RN5T618_DC3DAC_SLP, VDD_DDR_VAL_LP, },
85 { RN5T618_LDOEN1, 0x01f, ~0x1f, },
86 { RN5T618_LDOEN2, 0x10, ~0x30, },
87 { RN5T618_LDODIS, 0x00, },
88 { RN5T618_LDO3DAC, VDD_HIGH_VAL, },
89 { RN5T618_LDORTCDAC, VDD_RTC_VAL, },
90 { RN5T618_LDORTC1_SLOT, 0x0f, ~0x3f, },
93 static int rn5t618_setup_regs(uchar slave_addr, struct rn5t618_regs *r,
99 for (i = 0; i < count; i++, r++) {
103 ret = i2c_read(slave_addr, r->addr, 1, &value, 1);
104 if ((value & ~r->mask) != r->val) {
105 printf("Changing PMIC reg %02x from %02x to %02x\n",
106 r->addr, value, r->val);
109 printf("%s: failed to read PMIC register %02x: %d\n",
110 __func__, r->addr, ret);
114 ret = i2c_write(slave_addr, r->addr, 1, &r->val, 1);
116 printf("%s: failed to write PMIC register %02x: %d\n",
117 __func__, r->addr, ret);
124 int rn5t618_pmic_setup(uchar slave_addr)
129 ret = i2c_read(slave_addr, 0x11, 1, &value, 1);
131 printf("%s: i2c_read error: %d\n", __func__, ret);
135 ret = rn5t618_setup_regs(slave_addr, rn5t618_regs,
136 ARRAY_SIZE(rn5t618_regs));
140 ret = i2c_read(slave_addr, RN5T618_DC1DAC, 1, &value, 1);
142 printf("VDDCORE set to %umV\n", regval_to_mV(value));
144 printf("Failed to read VDDCORE register setting\n");
147 ret = i2c_read(slave_addr, RN5T618_DC2DAC, 1, &value, 1);
149 printf("VDDSOC set to %umV\n", regval_to_mV(value));
151 printf("Failed to read VDDSOC register setting\n");