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11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/err.h>
14#include <linux/input.h>
15#include <linux/interrupt.h>
16#include <linux/workqueue.h>
17#include <linux/spi/spi.h>
18#include <linux/pm.h>
19#include <linux/of.h>
20#include <linux/of_platform.h>
21#include <linux/of_device.h>
22
23#include "lis3lv02d.h"
24
25#define DRV_NAME "lis3lv02d_spi"
26#define LIS3_SPI_READ 0x80
27
28static int lis3_spi_read(struct lis3lv02d *lis3, int reg, u8 *v)
29{
30 struct spi_device *spi = lis3->bus_priv;
31 int ret = spi_w8r8(spi, reg | LIS3_SPI_READ);
32 if (ret < 0)
33 return -EINVAL;
34
35 *v = (u8) ret;
36 return 0;
37}
38
39static int lis3_spi_write(struct lis3lv02d *lis3, int reg, u8 val)
40{
41 u8 tmp[2] = { reg, val };
42 struct spi_device *spi = lis3->bus_priv;
43 return spi_write(spi, tmp, sizeof(tmp));
44}
45
46static int lis3_spi_init(struct lis3lv02d *lis3)
47{
48 u8 reg;
49 int ret;
50
51
52 ret = lis3->read(lis3, CTRL_REG1, ®);
53 if (ret < 0)
54 return ret;
55
56 reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
57 return lis3->write(lis3, CTRL_REG1, reg);
58}
59
60static union axis_conversion lis3lv02d_axis_normal =
61 { .as_array = { 1, 2, 3 } };
62
63#ifdef CONFIG_OF
64static const struct of_device_id lis302dl_spi_dt_ids[] = {
65 { .compatible = "st,lis302dl-spi" },
66 {}
67};
68MODULE_DEVICE_TABLE(of, lis302dl_spi_dt_ids);
69#endif
70
71static int lis302dl_spi_probe(struct spi_device *spi)
72{
73 int ret;
74
75 spi->bits_per_word = 8;
76 spi->mode = SPI_MODE_0;
77 ret = spi_setup(spi);
78 if (ret < 0)
79 return ret;
80
81 lis3_dev.bus_priv = spi;
82 lis3_dev.init = lis3_spi_init;
83 lis3_dev.read = lis3_spi_read;
84 lis3_dev.write = lis3_spi_write;
85 lis3_dev.irq = spi->irq;
86 lis3_dev.ac = lis3lv02d_axis_normal;
87 lis3_dev.pdata = spi->dev.platform_data;
88
89#ifdef CONFIG_OF
90 if (of_match_device(lis302dl_spi_dt_ids, &spi->dev)) {
91 lis3_dev.of_node = spi->dev.of_node;
92 ret = lis3lv02d_init_dt(&lis3_dev);
93 if (ret)
94 return ret;
95 }
96#endif
97 spi_set_drvdata(spi, &lis3_dev);
98
99 return lis3lv02d_init_device(&lis3_dev);
100}
101
102static int lis302dl_spi_remove(struct spi_device *spi)
103{
104 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
105 lis3lv02d_joystick_disable(lis3);
106 lis3lv02d_poweroff(lis3);
107
108 return lis3lv02d_remove_fs(&lis3_dev);
109}
110
111#ifdef CONFIG_PM_SLEEP
112static int lis3lv02d_spi_suspend(struct device *dev)
113{
114 struct spi_device *spi = to_spi_device(dev);
115 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
116
117 if (!lis3->pdata || !lis3->pdata->wakeup_flags)
118 lis3lv02d_poweroff(&lis3_dev);
119
120 return 0;
121}
122
123static int lis3lv02d_spi_resume(struct device *dev)
124{
125 struct spi_device *spi = to_spi_device(dev);
126 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
127
128 if (!lis3->pdata || !lis3->pdata->wakeup_flags)
129 lis3lv02d_poweron(lis3);
130
131 return 0;
132}
133#endif
134
135static SIMPLE_DEV_PM_OPS(lis3lv02d_spi_pm, lis3lv02d_spi_suspend,
136 lis3lv02d_spi_resume);
137
138static struct spi_driver lis302dl_spi_driver = {
139 .driver = {
140 .name = DRV_NAME,
141 .owner = THIS_MODULE,
142 .pm = &lis3lv02d_spi_pm,
143 .of_match_table = of_match_ptr(lis302dl_spi_dt_ids),
144 },
145 .probe = lis302dl_spi_probe,
146 .remove = lis302dl_spi_remove,
147};
148
149module_spi_driver(lis302dl_spi_driver);
150
151MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
152MODULE_DESCRIPTION("lis3lv02d SPI glue layer");
153MODULE_LICENSE("GPL");
154MODULE_ALIAS("spi:" DRV_NAME);
155