1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * max1586.h -- Voltage regulation for the Maxim 1586 |
4 | * |
5 | * Copyright (C) 2008 Robert Jarzmik |
6 | */ |
7 | |
8 | #ifndef REGULATOR_MAX1586 |
9 | #define REGULATOR_MAX1586 |
10 | |
11 | #include <linux/regulator/machine.h> |
12 | |
13 | #define MAX1586_V3 0 |
14 | #define MAX1586_V6 1 |
15 | |
16 | /* precalculated values for v3_gain */ |
17 | #define MAX1586_GAIN_NO_R24 1000000 /* 700000 .. 1475000 mV */ |
18 | #define MAX1586_GAIN_R24_3k32 1051098 /* 735768 .. 1550369 mV */ |
19 | #define MAX1586_GAIN_R24_5k11 1078648 /* 755053 .. 1591005 mV */ |
20 | #define MAX1586_GAIN_R24_7k5 1115432 /* 780802 .. 1645262 mV */ |
21 | |
22 | /** |
23 | * max1586_subdev_data - regulator data |
24 | * @id: regulator Id (either MAX1586_V3 or MAX1586_V6) |
25 | * @name: regulator cute name (example for V3: "vcc_core") |
26 | * @platform_data: regulator init data (constraints, supplies, ...) |
27 | */ |
28 | struct max1586_subdev_data { |
29 | int id; |
30 | const char *name; |
31 | struct regulator_init_data *platform_data; |
32 | }; |
33 | |
34 | /** |
35 | * max1586_platform_data - platform data for max1586 |
36 | * @num_subdevs: number of regulators used (may be 1 or 2) |
37 | * @subdevs: regulator used |
38 | * At most, there will be a regulator for V3 and one for V6 voltages. |
39 | * @v3_gain: gain on the V3 voltage output multiplied by 1e6. |
40 | * This can be calculated as ((1 + R24/R25 + R24/185.5kOhm) * 1e6) |
41 | * for an external resistor configuration as described in the |
42 | * data sheet (R25=100kOhm). |
43 | */ |
44 | struct max1586_platform_data { |
45 | int num_subdevs; |
46 | struct max1586_subdev_data *subdevs; |
47 | int v3_gain; |
48 | }; |
49 | |
50 | #endif |
51 | |