1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * TI/National Semiconductor LP3943 Device
5 * Copyright 2013 Texas Instruments
7 * Author: Milo Kim <milo.kim@ti.com>
10 #ifndef __MFD_LP3943_H__
11 #define __MFD_LP3943_H__
13 #include <linux/gpio.h>
14 #include <linux/pwm.h>
15 #include <linux/regmap.h>
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
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
36 #define LP3943_NUM_PWMS 2
38 enum lp3943_pwm_output {
58 * struct lp3943_pwm_map
59 * @output: Output pins which are mapped to each PWM channel
60 * @num_outputs: Number of outputs
62 struct lp3943_pwm_map {
63 enum lp3943_pwm_output *output;
68 * struct lp3943_platform_data
69 * @pwms: Output channel definitions for PWM channel 0 and 1
71 struct lp3943_platform_data {
72 struct lp3943_pwm_map *pwms[LP3943_NUM_PWMS];
76 * struct lp3943_reg_cfg
77 * @reg: Register address
78 * @mask: Register bit mask to be updated
79 * @shift: Register bit shift
81 struct lp3943_reg_cfg {
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.
101 struct regmap *regmap;
102 struct lp3943_platform_data *pdata;
103 const struct lp3943_reg_cfg *mux_cfg;
104 unsigned long pin_used;
107 int lp3943_read_byte(struct lp3943 *lp3943, u8 reg, u8 *read);
108 int lp3943_write_byte(struct lp3943 *lp3943, u8 reg, u8 data);
109 int lp3943_update_bits(struct lp3943 *lp3943, u8 reg, u8 mask, u8 data);