2 * lis3lv02d_spi - SPI glue layer for lis3lv02d
4 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * publishhed by the Free Software Foundation.
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/err.h>
15 #include <linux/input.h>
16 #include <linux/interrupt.h>
17 #include <linux/workqueue.h>
18 #include <linux/spi/spi.h>
21 #include <linux/of_platform.h>
22 #include <linux/of_device.h>
24 #include "lis3lv02d.h"
26 #define DRV_NAME "lis3lv02d_spi"
27 #define LIS3_SPI_READ 0x80
29 static int lis3_spi_read(struct lis3lv02d *lis3, int reg, u8 *v)
31 struct spi_device *spi = lis3->bus_priv;
32 int ret = spi_w8r8(spi, reg | LIS3_SPI_READ);
40 static int lis3_spi_write(struct lis3lv02d *lis3, int reg, u8 val)
42 u8 tmp[2] = { reg, val };
43 struct spi_device *spi = lis3->bus_priv;
44 return spi_write(spi, tmp, sizeof(tmp));
47 static int lis3_spi_init(struct lis3lv02d *lis3)
52 /* power up the device */
53 ret = lis3->read(lis3, CTRL_REG1, ®);
57 reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
58 return lis3->write(lis3, CTRL_REG1, reg);
61 static union axis_conversion lis3lv02d_axis_normal =
62 { .as_array = { 1, 2, 3 } };
65 static struct of_device_id lis302dl_spi_dt_ids[] = {
66 { .compatible = "st,lis302dl-spi" },
69 MODULE_DEVICE_TABLE(of, lis302dl_spi_dt_ids);
72 static int __devinit lis302dl_spi_probe(struct spi_device *spi)
76 spi->bits_per_word = 8;
77 spi->mode = SPI_MODE_0;
82 lis3_dev.bus_priv = spi;
83 lis3_dev.init = lis3_spi_init;
84 lis3_dev.read = lis3_spi_read;
85 lis3_dev.write = lis3_spi_write;
86 lis3_dev.irq = spi->irq;
87 lis3_dev.ac = lis3lv02d_axis_normal;
88 lis3_dev.pdata = spi->dev.platform_data;
91 if (of_match_device(lis302dl_spi_dt_ids, &spi->dev)) {
92 lis3_dev.of_node = spi->dev.of_node;
93 ret = lis3lv02d_init_dt(&lis3_dev);
98 spi_set_drvdata(spi, &lis3_dev);
100 return lis3lv02d_init_device(&lis3_dev);
103 static int __devexit lis302dl_spi_remove(struct spi_device *spi)
105 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
106 lis3lv02d_joystick_disable(lis3);
107 lis3lv02d_poweroff(lis3);
109 return lis3lv02d_remove_fs(&lis3_dev);
112 #ifdef CONFIG_PM_SLEEP
113 static int lis3lv02d_spi_suspend(struct device *dev)
115 struct spi_device *spi = to_spi_device(dev);
116 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
118 if (!lis3->pdata || !lis3->pdata->wakeup_flags)
119 lis3lv02d_poweroff(&lis3_dev);
124 static int lis3lv02d_spi_resume(struct device *dev)
126 struct spi_device *spi = to_spi_device(dev);
127 struct lis3lv02d *lis3 = spi_get_drvdata(spi);
129 if (!lis3->pdata || !lis3->pdata->wakeup_flags)
130 lis3lv02d_poweron(lis3);
136 static SIMPLE_DEV_PM_OPS(lis3lv02d_spi_pm, lis3lv02d_spi_suspend,
137 lis3lv02d_spi_resume);
139 static struct spi_driver lis302dl_spi_driver = {
142 .owner = THIS_MODULE,
143 .pm = &lis3lv02d_spi_pm,
144 .of_match_table = of_match_ptr(lis302dl_spi_dt_ids),
146 .probe = lis302dl_spi_probe,
147 .remove = __devexit_p(lis302dl_spi_remove),
150 module_spi_driver(lis302dl_spi_driver);
152 MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
153 MODULE_DESCRIPTION("lis3lv02d SPI glue layer");
154 MODULE_LICENSE("GPL");
155 MODULE_ALIAS("spi:" DRV_NAME);