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192.168.1.100 / T108 / e958203796650e3959a43708d67534bf36f4c83b / . / marvell / linux / drivers / misc / lis3lv02d / lis3lv02d_spi.c
blob: f664ed123730de50c7f05fd94496d6237db3d38b [file] [log] [blame]
b.liue9582032025-04-17 19:18:16 +0800[diff] [blame^]1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * lis3lv02d_spi - SPI glue layer for lis3lv02d
4 *
5 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
6 */
7
8#include <linux/module.h>
9#include <linux/kernel.h>
10#include <linux/err.h>
11#include <linux/input.h>
12#include <linux/interrupt.h>
13#include <linux/workqueue.h>
14#include <linux/spi/spi.h>
15#include <linux/pm.h>
16#include <linux/of.h>
17#include <linux/of_platform.h>
18#include <linux/of_device.h>
19
20#include "lis3lv02d.h"
21
22#define DRV_NAME "lis3lv02d_spi"
23#define LIS3_SPI_READ 0x80
24
25static int lis3_spi_read(struct lis3lv02d *lis3, int reg, u8 *v)
26{
27 struct spi_device *spi = lis3->bus_priv;
28 int ret = spi_w8r8(spi, reg | LIS3_SPI_READ);
29 if (ret < 0)
30 return -EINVAL;
31
32 *v = (u8) ret;
33 return 0;
34}
35
36static int lis3_spi_write(struct lis3lv02d *lis3, int reg, u8 val)
37{
38 u8 tmp[2] = { reg, val };
39 struct spi_device *spi = lis3->bus_priv;
40 return spi_write(spi, tmp, sizeof(tmp));
41}
42
43static int lis3_spi_init(struct lis3lv02d *lis3)
44{
45 u8 reg;
46 int ret;
47
48 /* power up the device */
49 ret = lis3->read(lis3, CTRL_REG1, &reg);
50 if (ret < 0)
51 return ret;
52
53 reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
54 return lis3->write(lis3, CTRL_REG1, reg);
55}
56
57static union axis_conversion lis3lv02d_axis_normal =
58 { .as_array = { 1, 2, 3 } };
59
60#ifdef CONFIG_OF
61static const struct of_device_id lis302dl_spi_dt_ids[] = {
62 { .compatible = "st,lis302dl-spi" },
63 {}
64};
65MODULE_DEVICE_TABLE(of, lis302dl_spi_dt_ids);
66#endif
67
68static int lis302dl_spi_probe(struct spi_device *spi)
69{
70 int ret;
71
72 spi->bits_per_word = 8;
73 spi->mode = SPI_MODE_0;
74 ret = spi_setup(spi);
75 if (ret < 0)
76 return ret;
77
78 lis3_dev.bus_priv = spi;
79 lis3_dev.init = lis3_spi_init;
80 lis3_dev.read = lis3_spi_read;
81 lis3_dev.write = lis3_spi_write;
82 lis3_dev.irq = spi->irq;
83 lis3_dev.ac = lis3lv02d_axis_normal;
84 lis3_dev.pdata = spi->dev.platform_data;
85
86#ifdef CONFIG_OF
87 if (of_match_device(lis302dl_spi_dt_ids, &spi->dev)) {
88 lis3_dev.of_node = spi->dev.of_node;
89 ret = lis3lv02d_init_dt(&lis3_dev);
90 if (ret)
91 return ret;
92 }
93#endif
94 spi_set_drvdata(spi, &lis3_dev);
95
96 return lis3lv02d_init_device(&lis3_dev);
97}
98
99static int lis302dl_spi_remove(struct spi_device *spi)
100{
101 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
102 lis3lv02d_joystick_disable(lis3);
103 lis3lv02d_poweroff(lis3);
104
105 return lis3lv02d_remove_fs(&lis3_dev);
106}
107
108#ifdef CONFIG_PM_SLEEP
109static int lis3lv02d_spi_suspend(struct device *dev)
110{
111 struct spi_device *spi = to_spi_device(dev);
112 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
113
114 if (!lis3->pdata || !lis3->pdata->wakeup_flags)
115 lis3lv02d_poweroff(&lis3_dev);
116
117 return 0;
118}
119
120static int lis3lv02d_spi_resume(struct device *dev)
121{
122 struct spi_device *spi = to_spi_device(dev);
123 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
124
125 if (!lis3->pdata || !lis3->pdata->wakeup_flags)
126 lis3lv02d_poweron(lis3);
127
128 return 0;
129}
130#endif
131
132static SIMPLE_DEV_PM_OPS(lis3lv02d_spi_pm, lis3lv02d_spi_suspend,
133 lis3lv02d_spi_resume);
134
135static struct spi_driver lis302dl_spi_driver = {
136 .driver = {
137 .name = DRV_NAME,
138 .pm = &lis3lv02d_spi_pm,
139 .of_match_table = of_match_ptr(lis302dl_spi_dt_ids),
140 },
141 .probe = lis302dl_spi_probe,
142 .remove = lis302dl_spi_remove,
143};
144
145module_spi_driver(lis302dl_spi_driver);
146
147MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
148MODULE_DESCRIPTION("lis3lv02d SPI glue layer");
149MODULE_LICENSE("GPL");
150MODULE_ALIAS("spi:" DRV_NAME);