1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * TI/National Semiconductor LP3943 Device
4 *
5 * Copyright 2013 Texas Instruments
6 *
7 * Author: Milo Kim <milo.kim@ti.com>
8 */
9
10#ifndef __MFD_LP3943_H__
11#define __MFD_LP3943_H__
12
13#include <linux/gpio.h>
14#include <linux/pwm.h>
15#include <linux/regmap.h>
16
17/* Registers */
18#define LP3943_REG_GPIO_A 0x00
19#define LP3943_REG_GPIO_B 0x01
20#define LP3943_REG_PRESCALE0 0x02
21#define LP3943_REG_PWM0 0x03
22#define LP3943_REG_PRESCALE1 0x04
23#define LP3943_REG_PWM1 0x05
24#define LP3943_REG_MUX0 0x06
25#define LP3943_REG_MUX1 0x07
26#define LP3943_REG_MUX2 0x08
27#define LP3943_REG_MUX3 0x09
28
29/* Bit description for LP3943_REG_MUX0 ~ 3 */
30#define LP3943_GPIO_IN 0x00
31#define LP3943_GPIO_OUT_HIGH 0x00
32#define LP3943_GPIO_OUT_LOW 0x01
33#define LP3943_DIM_PWM0 0x02
34#define LP3943_DIM_PWM1 0x03
35
36#define LP3943_NUM_PWMS 2
37
38enum lp3943_pwm_output {
39 LP3943_PWM_OUT0,
40 LP3943_PWM_OUT1,
41 LP3943_PWM_OUT2,
42 LP3943_PWM_OUT3,
43 LP3943_PWM_OUT4,
44 LP3943_PWM_OUT5,
45 LP3943_PWM_OUT6,
46 LP3943_PWM_OUT7,
47 LP3943_PWM_OUT8,
48 LP3943_PWM_OUT9,
49 LP3943_PWM_OUT10,
50 LP3943_PWM_OUT11,
51 LP3943_PWM_OUT12,
52 LP3943_PWM_OUT13,
53 LP3943_PWM_OUT14,
54 LP3943_PWM_OUT15,
55};
56
57/*
58 * struct lp3943_pwm_map
59 * @output: Output pins which are mapped to each PWM channel
60 * @num_outputs: Number of outputs
61 */
62struct lp3943_pwm_map {
63 enum lp3943_pwm_output *output;
64 int num_outputs;
65};
66
67/*
68 * struct lp3943_platform_data
69 * @pwms: Output channel definitions for PWM channel 0 and 1
70 */
71struct lp3943_platform_data {
72 struct lp3943_pwm_map *pwms[LP3943_NUM_PWMS];
73};
74
75/*
76 * struct lp3943_reg_cfg
77 * @reg: Register address
78 * @mask: Register bit mask to be updated
79 * @shift: Register bit shift
80 */
81struct lp3943_reg_cfg {
82 u8 reg;
83 u8 mask;
84 u8 shift;
85};
86
87/*
88 * struct lp3943
89 * @dev: Parent device pointer
90 * @regmap: Used for I2C communication on accessing registers
91 * @pdata: LP3943 platform specific data
92 * @mux_cfg: Register configuration for pin MUX
93 * @pin_used: Bit mask for output pin used.
94 * This bitmask is used for pin assignment management.
95 * 1 = pin used, 0 = available.
96 * Only LSB 16 bits are used, but it is unsigned long type
97 * for atomic bitwise operations.
98 */
99struct lp3943 {
100 struct device *dev;
101 struct regmap *regmap;
102 struct lp3943_platform_data *pdata;
103 const struct lp3943_reg_cfg *mux_cfg;
104 unsigned long pin_used;
105};
106
107int lp3943_read_byte(struct lp3943 *lp3943, u8 reg, u8 *read);
108int lp3943_write_byte(struct lp3943 *lp3943, u8 reg, u8 data);
109int lp3943_update_bits(struct lp3943 *lp3943, u8 reg, u8 mask, u8 data);
110#endif
111

source code of linux/include/linux/mfd/lp3943.h