1 /*
2 * Copyright (c) 2023 Grinn
3 * SPDX-License-Identifier: Apache-2.0
4 */
5
6 #define DT_DRV_COMPAT adi_ad559x
7
8 #include <zephyr/drivers/gpio.h>
9 #include <zephyr/kernel.h>
10 #include <zephyr/sys/byteorder.h>
11
12 #include <zephyr/drivers/mfd/ad559x.h>
13
14 #include "mfd_ad559x.h"
15
mfd_ad559x_has_pointer_byte_map(const struct device * dev)16 bool mfd_ad559x_has_pointer_byte_map(const struct device *dev)
17 {
18 const struct mfd_ad559x_config *config = dev->config;
19
20 return config->has_pointer_byte_map;
21 }
22
mfd_ad559x_read_raw(const struct device * dev,uint8_t * val,size_t len)23 int mfd_ad559x_read_raw(const struct device *dev, uint8_t *val, size_t len)
24 {
25 struct mfd_ad559x_data *data = dev->data;
26
27 return data->transfer_function->read_raw(dev, val, len);
28 }
29
mfd_ad559x_write_raw(const struct device * dev,uint8_t * val,size_t len)30 int mfd_ad559x_write_raw(const struct device *dev, uint8_t *val, size_t len)
31 {
32 struct mfd_ad559x_data *data = dev->data;
33
34 return data->transfer_function->write_raw(dev, val, len);
35 }
36
mfd_ad559x_read_reg(const struct device * dev,uint8_t reg,uint8_t reg_data,uint16_t * val)37 int mfd_ad559x_read_reg(const struct device *dev, uint8_t reg, uint8_t reg_data, uint16_t *val)
38 {
39 struct mfd_ad559x_data *data = dev->data;
40
41 return data->transfer_function->read_reg(dev, reg, reg_data, val);
42 }
43
mfd_ad559x_write_reg(const struct device * dev,uint8_t reg,uint16_t val)44 int mfd_ad559x_write_reg(const struct device *dev, uint8_t reg, uint16_t val)
45 {
46 struct mfd_ad559x_data *data = dev->data;
47
48 return data->transfer_function->write_reg(dev, reg, val);
49 }
50
mfd_add559x_software_reset(const struct device * dev)51 static int mfd_add559x_software_reset(const struct device *dev)
52 {
53 return mfd_ad559x_write_reg(dev, AD559X_REG_SOFTWARE_RESET,
54 AD559X_SOFTWARE_RESET_MAGIC_VAL);
55 }
56
mfd_ad559x_init(const struct device * dev)57 static int mfd_ad559x_init(const struct device *dev)
58 {
59 const struct mfd_ad559x_config *config = dev->config;
60 int ret;
61
62 ret = config->bus_init(dev);
63 if (ret < 0) {
64 return ret;
65 }
66
67 if (!gpio_is_ready_dt(&config->reset_gpio)) {
68 return -ENODEV;
69 }
70
71 ret = gpio_pin_configure_dt(&config->reset_gpio, GPIO_OUTPUT_INACTIVE);
72 if (ret < 0) {
73 return ret;
74 }
75
76 ret = mfd_add559x_software_reset(dev);
77 if (ret < 0) {
78 return ret;
79 }
80
81 return 0;
82 }
83
84 #define MDF_AD559X_DEFINE_I2C_BUS(inst) \
85 .i2c = I2C_DT_SPEC_INST_GET(inst), .bus_init = mfd_ad559x_i2c_init, \
86 .has_pointer_byte_map = true
87
88 #define MDF_AD559X_DEFINE_SPI_BUS_FLAGS \
89 (SPI_WORD_SET(8) | SPI_TRANSFER_MSB | SPI_OP_MODE_MASTER | SPI_MODE_CPOL)
90
91 #define MDF_AD559X_DEFINE_SPI_BUS(inst) \
92 .spi = SPI_DT_SPEC_INST_GET(inst, MDF_AD559X_DEFINE_SPI_BUS_FLAGS, 0), \
93 .bus_init = mfd_ad559x_spi_init, .has_pointer_byte_map = false
94
95 #define MFD_AD559X_DEFINE_BUS(inst) \
96 COND_CODE_1(DT_INST_ON_BUS(inst, i2c), (MDF_AD559X_DEFINE_I2C_BUS(inst)), \
97 (MDF_AD559X_DEFINE_SPI_BUS(inst)))
98
99 #define MFD_AD559X_DEFINE(inst) \
100 static struct mfd_ad559x_data mfd_ad559x_data_##inst; \
101 static const struct mfd_ad559x_config mfd_ad559x_config_##inst = { \
102 .reset_gpio = GPIO_DT_SPEC_INST_GET(inst, reset_gpios), \
103 MFD_AD559X_DEFINE_BUS(inst), \
104 }; \
105 \
106 DEVICE_DT_INST_DEFINE(inst, mfd_ad559x_init, NULL, &mfd_ad559x_data_##inst, \
107 &mfd_ad559x_config_##inst, POST_KERNEL, CONFIG_MFD_INIT_PRIORITY, \
108 NULL);
109
110 DT_INST_FOREACH_STATUS_OKAY(MFD_AD559X_DEFINE);
111
