arm64: dts: qcom: sm8550: add TRNG node
[linux-modified.git] / drivers / iio / accel / adxl313_spi.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * ADXL313 3-Axis Digital Accelerometer
4  *
5  * Copyright (c) 2021 Lucas Stankus <lucas.p.stankus@gmail.com>
6  *
7  * Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf
8  */
9
10 #include <linux/mod_devicetable.h>
11 #include <linux/module.h>
12 #include <linux/regmap.h>
13 #include <linux/spi/spi.h>
14 #include <linux/property.h>
15
16 #include "adxl313.h"
17
18 static const struct regmap_config adxl31x_spi_regmap_config[] = {
19         [ADXL312] = {
20                 .reg_bits       = 8,
21                 .val_bits       = 8,
22                 .rd_table       = &adxl312_readable_regs_table,
23                 .wr_table       = &adxl312_writable_regs_table,
24                 .max_register   = 0x39,
25                 /* Setting bits 7 and 6 enables multiple-byte read */
26                 .read_flag_mask = BIT(7) | BIT(6),
27         },
28         [ADXL313] = {
29                 .reg_bits       = 8,
30                 .val_bits       = 8,
31                 .rd_table       = &adxl313_readable_regs_table,
32                 .wr_table       = &adxl313_writable_regs_table,
33                 .max_register   = 0x39,
34                 /* Setting bits 7 and 6 enables multiple-byte read */
35                 .read_flag_mask = BIT(7) | BIT(6),
36         },
37         [ADXL314] = {
38                 .reg_bits       = 8,
39                 .val_bits       = 8,
40                 .rd_table       = &adxl314_readable_regs_table,
41                 .wr_table       = &adxl314_writable_regs_table,
42                 .max_register   = 0x39,
43                 /* Setting bits 7 and 6 enables multiple-byte read */
44                 .read_flag_mask = BIT(7) | BIT(6),
45         },
46 };
47
48 static int adxl313_spi_setup(struct device *dev, struct regmap *regmap)
49 {
50         struct spi_device *spi = container_of(dev, struct spi_device, dev);
51         int ret;
52
53         if (spi->mode & SPI_3WIRE) {
54                 ret = regmap_write(regmap, ADXL313_REG_DATA_FORMAT,
55                                    ADXL313_SPI_3WIRE);
56                 if (ret)
57                         return ret;
58         }
59
60         return regmap_update_bits(regmap, ADXL313_REG_POWER_CTL,
61                                   ADXL313_I2C_DISABLE, ADXL313_I2C_DISABLE);
62 }
63
64 static int adxl313_spi_probe(struct spi_device *spi)
65 {
66         const struct adxl313_chip_info *chip_data;
67         struct regmap *regmap;
68         int ret;
69
70         spi->mode |= SPI_MODE_3;
71         ret = spi_setup(spi);
72         if (ret)
73                 return ret;
74
75         /*
76          * Retrieves device specific data as a pointer to a
77          * adxl313_chip_info structure
78          */
79         chip_data = device_get_match_data(&spi->dev);
80         if (!chip_data)
81                 chip_data = (const struct adxl313_chip_info *)spi_get_device_id(spi)->driver_data;
82
83         regmap = devm_regmap_init_spi(spi,
84                                       &adxl31x_spi_regmap_config[chip_data->type]);
85
86         if (IS_ERR(regmap)) {
87                 dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",
88                         PTR_ERR(regmap));
89                 return PTR_ERR(regmap);
90         }
91
92         return adxl313_core_probe(&spi->dev, regmap,
93                                   chip_data, &adxl313_spi_setup);
94 }
95
96 static const struct spi_device_id adxl313_spi_id[] = {
97         { .name = "adxl312", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL312] },
98         { .name = "adxl313", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL313] },
99         { .name = "adxl314", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL314] },
100         { }
101 };
102
103 MODULE_DEVICE_TABLE(spi, adxl313_spi_id);
104
105 static const struct of_device_id adxl313_of_match[] = {
106         { .compatible = "adi,adxl312", .data = &adxl31x_chip_info[ADXL312] },
107         { .compatible = "adi,adxl313", .data = &adxl31x_chip_info[ADXL313] },
108         { .compatible = "adi,adxl314", .data = &adxl31x_chip_info[ADXL314] },
109         { }
110 };
111
112 MODULE_DEVICE_TABLE(of, adxl313_of_match);
113
114 static struct spi_driver adxl313_spi_driver = {
115         .driver = {
116                 .name   = "adxl313_spi",
117                 .of_match_table = adxl313_of_match,
118         },
119         .probe          = adxl313_spi_probe,
120         .id_table       = adxl313_spi_id,
121 };
122
123 module_spi_driver(adxl313_spi_driver);
124
125 MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>");
126 MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer SPI driver");
127 MODULE_LICENSE("GPL v2");
128 MODULE_IMPORT_NS(IIO_ADXL313);