1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (C) 2020 InvenSense, Inc. |
4 | */ |
5 | |
6 | #include <linux/kernel.h> |
7 | #include <linux/device.h> |
8 | #include <linux/module.h> |
9 | #include <linux/mod_devicetable.h> |
10 | #include <linux/spi/spi.h> |
11 | #include <linux/regmap.h> |
12 | #include <linux/property.h> |
13 | |
14 | #include "inv_icm42600.h" |
15 | |
16 | static int inv_icm42600_spi_bus_setup(struct inv_icm42600_state *st) |
17 | { |
18 | unsigned int mask, val; |
19 | int ret; |
20 | |
21 | /* setup interface registers */ |
22 | val = INV_ICM42600_INTF_CONFIG6_I3C_EN | |
23 | INV_ICM42600_INTF_CONFIG6_I3C_SDR_EN | |
24 | INV_ICM42600_INTF_CONFIG6_I3C_DDR_EN; |
25 | ret = regmap_update_bits(map: st->map, INV_ICM42600_REG_INTF_CONFIG6, |
26 | INV_ICM42600_INTF_CONFIG6_MASK, val); |
27 | if (ret) |
28 | return ret; |
29 | |
30 | ret = regmap_update_bits(map: st->map, INV_ICM42600_REG_INTF_CONFIG4, |
31 | INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY, val: 0); |
32 | if (ret) |
33 | return ret; |
34 | |
35 | /* set slew rates for I2C and SPI */ |
36 | mask = INV_ICM42600_DRIVE_CONFIG_I2C_MASK | |
37 | INV_ICM42600_DRIVE_CONFIG_SPI_MASK; |
38 | val = INV_ICM42600_DRIVE_CONFIG_I2C(INV_ICM42600_SLEW_RATE_20_60NS) | |
39 | INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_INF_2NS); |
40 | ret = regmap_update_bits(map: st->map, INV_ICM42600_REG_DRIVE_CONFIG, |
41 | mask, val); |
42 | if (ret) |
43 | return ret; |
44 | |
45 | /* disable i2c bus */ |
46 | return regmap_update_bits(map: st->map, INV_ICM42600_REG_INTF_CONFIG0, |
47 | INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK, |
48 | INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_I2C_DIS); |
49 | } |
50 | |
51 | static int inv_icm42600_probe(struct spi_device *spi) |
52 | { |
53 | const void *match; |
54 | enum inv_icm42600_chip chip; |
55 | struct regmap *regmap; |
56 | |
57 | match = device_get_match_data(dev: &spi->dev); |
58 | if (!match) |
59 | return -EINVAL; |
60 | chip = (uintptr_t)match; |
61 | |
62 | regmap = devm_regmap_init_spi(spi, &inv_icm42600_regmap_config); |
63 | if (IS_ERR(ptr: regmap)) |
64 | return PTR_ERR(ptr: regmap); |
65 | |
66 | return inv_icm42600_core_probe(regmap, chip, irq: spi->irq, |
67 | bus_setup: inv_icm42600_spi_bus_setup); |
68 | } |
69 | |
70 | static const struct of_device_id inv_icm42600_of_matches[] = { |
71 | { |
72 | .compatible = "invensense,icm42600" , |
73 | .data = (void *)INV_CHIP_ICM42600, |
74 | }, { |
75 | .compatible = "invensense,icm42602" , |
76 | .data = (void *)INV_CHIP_ICM42602, |
77 | }, { |
78 | .compatible = "invensense,icm42605" , |
79 | .data = (void *)INV_CHIP_ICM42605, |
80 | }, { |
81 | .compatible = "invensense,icm42622" , |
82 | .data = (void *)INV_CHIP_ICM42622, |
83 | }, { |
84 | .compatible = "invensense,icm42631" , |
85 | .data = (void *)INV_CHIP_ICM42631, |
86 | }, |
87 | {} |
88 | }; |
89 | MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches); |
90 | |
91 | static struct spi_driver inv_icm42600_driver = { |
92 | .driver = { |
93 | .name = "inv-icm42600-spi" , |
94 | .of_match_table = inv_icm42600_of_matches, |
95 | .pm = pm_ptr(&inv_icm42600_pm_ops), |
96 | }, |
97 | .probe = inv_icm42600_probe, |
98 | }; |
99 | module_spi_driver(inv_icm42600_driver); |
100 | |
101 | MODULE_AUTHOR("InvenSense, Inc." ); |
102 | MODULE_DESCRIPTION("InvenSense ICM-426xx SPI driver" ); |
103 | MODULE_LICENSE("GPL" ); |
104 | MODULE_IMPORT_NS(IIO_ICM42600); |
105 | |