| Milo Kim | 470eca4 | 2013-12-06 11:18:41 +0900 | [diff] [blame] | 1 | /* |
| 2 | * TI/National Semiconductor LP3943 Device |
| 3 | * |
| 4 | * Copyright 2013 Texas Instruments |
| 5 | * |
| 6 | * Author: Milo Kim <milo.kim@ti.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #ifndef __MFD_LP3943_H__ |
| 15 | #define __MFD_LP3943_H__ |
| 16 | |
| 17 | #include <linux/gpio.h> |
| 18 | #include <linux/pwm.h> |
| 19 | #include <linux/regmap.h> |
| 20 | |
| 21 | /* Registers */ |
| 22 | #define LP3943_REG_GPIO_A 0x00 |
| 23 | #define LP3943_REG_GPIO_B 0x01 |
| 24 | #define LP3943_REG_PRESCALE0 0x02 |
| 25 | #define LP3943_REG_PWM0 0x03 |
| 26 | #define LP3943_REG_PRESCALE1 0x04 |
| 27 | #define LP3943_REG_PWM1 0x05 |
| 28 | #define LP3943_REG_MUX0 0x06 |
| 29 | #define LP3943_REG_MUX1 0x07 |
| 30 | #define LP3943_REG_MUX2 0x08 |
| 31 | #define LP3943_REG_MUX3 0x09 |
| 32 | |
| 33 | /* Bit description for LP3943_REG_MUX0 ~ 3 */ |
| 34 | #define LP3943_GPIO_IN 0x00 |
| 35 | #define LP3943_GPIO_OUT_HIGH 0x00 |
| 36 | #define LP3943_GPIO_OUT_LOW 0x01 |
| 37 | #define LP3943_DIM_PWM0 0x02 |
| 38 | #define LP3943_DIM_PWM1 0x03 |
| 39 | |
| 40 | #define LP3943_NUM_PWMS 2 |
| 41 | |
| 42 | enum lp3943_pwm_output { |
| 43 | LP3943_PWM_OUT0, |
| 44 | LP3943_PWM_OUT1, |
| 45 | LP3943_PWM_OUT2, |
| 46 | LP3943_PWM_OUT3, |
| 47 | LP3943_PWM_OUT4, |
| 48 | LP3943_PWM_OUT5, |
| 49 | LP3943_PWM_OUT6, |
| 50 | LP3943_PWM_OUT7, |
| 51 | LP3943_PWM_OUT8, |
| 52 | LP3943_PWM_OUT9, |
| 53 | LP3943_PWM_OUT10, |
| 54 | LP3943_PWM_OUT11, |
| 55 | LP3943_PWM_OUT12, |
| 56 | LP3943_PWM_OUT13, |
| 57 | LP3943_PWM_OUT14, |
| 58 | LP3943_PWM_OUT15, |
| 59 | }; |
| 60 | |
| 61 | /* |
| 62 | * struct lp3943_pwm_map |
| 63 | * @output: Output pins which are mapped to each PWM channel |
| 64 | * @num_outputs: Number of outputs |
| 65 | */ |
| 66 | struct lp3943_pwm_map { |
| 67 | enum lp3943_pwm_output *output; |
| 68 | int num_outputs; |
| 69 | }; |
| 70 | |
| 71 | /* |
| 72 | * struct lp3943_platform_data |
| 73 | * @pwms: Output channel definitions for PWM channel 0 and 1 |
| 74 | */ |
| 75 | struct lp3943_platform_data { |
| 76 | struct lp3943_pwm_map *pwms[LP3943_NUM_PWMS]; |
| 77 | }; |
| 78 | |
| 79 | /* |
| 80 | * struct lp3943_reg_cfg |
| 81 | * @reg: Register address |
| 82 | * @mask: Register bit mask to be updated |
| 83 | * @shift: Register bit shift |
| 84 | */ |
| 85 | struct lp3943_reg_cfg { |
| 86 | u8 reg; |
| 87 | u8 mask; |
| 88 | u8 shift; |
| 89 | }; |
| 90 | |
| 91 | /* |
| 92 | * struct lp3943 |
| 93 | * @dev: Parent device pointer |
| 94 | * @regmap: Used for I2C communication on accessing registers |
| 95 | * @pdata: LP3943 platform specific data |
| 96 | * @mux_cfg: Register configuration for pin MUX |
| 97 | * @pin_used: Bit mask for output pin used. |
| 98 | * This bitmask is used for pin assignment management. |
| 99 | * 1 = pin used, 0 = available. |
| 100 | * Only LSB 16 bits are used, but it is unsigned long type |
| 101 | * for atomic bitwise operations. |
| 102 | */ |
| 103 | struct lp3943 { |
| 104 | struct device *dev; |
| 105 | struct regmap *regmap; |
| 106 | struct lp3943_platform_data *pdata; |
| 107 | const struct lp3943_reg_cfg *mux_cfg; |
| 108 | unsigned long pin_used; |
| 109 | }; |
| 110 | |
| 111 | int lp3943_read_byte(struct lp3943 *lp3943, u8 reg, u8 *read); |
| 112 | int lp3943_write_byte(struct lp3943 *lp3943, u8 reg, u8 data); |
| 113 | int lp3943_update_bits(struct lp3943 *lp3943, u8 reg, u8 mask, u8 data); |
| 114 | #endif |