![Andrew F. Davis](/assets/img/avatar_default.png)
An spi_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
154 lines
3.5 KiB
C
154 lines
3.5 KiB
C
/*
|
|
* lis3lv02d_spi - SPI glue layer for lis3lv02d
|
|
*
|
|
* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* publishhed by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/err.h>
|
|
#include <linux/input.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/of_device.h>
|
|
|
|
#include "lis3lv02d.h"
|
|
|
|
#define DRV_NAME "lis3lv02d_spi"
|
|
#define LIS3_SPI_READ 0x80
|
|
|
|
static int lis3_spi_read(struct lis3lv02d *lis3, int reg, u8 *v)
|
|
{
|
|
struct spi_device *spi = lis3->bus_priv;
|
|
int ret = spi_w8r8(spi, reg | LIS3_SPI_READ);
|
|
if (ret < 0)
|
|
return -EINVAL;
|
|
|
|
*v = (u8) ret;
|
|
return 0;
|
|
}
|
|
|
|
static int lis3_spi_write(struct lis3lv02d *lis3, int reg, u8 val)
|
|
{
|
|
u8 tmp[2] = { reg, val };
|
|
struct spi_device *spi = lis3->bus_priv;
|
|
return spi_write(spi, tmp, sizeof(tmp));
|
|
}
|
|
|
|
static int lis3_spi_init(struct lis3lv02d *lis3)
|
|
{
|
|
u8 reg;
|
|
int ret;
|
|
|
|
/* power up the device */
|
|
ret = lis3->read(lis3, CTRL_REG1, ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
|
|
return lis3->write(lis3, CTRL_REG1, reg);
|
|
}
|
|
|
|
static union axis_conversion lis3lv02d_axis_normal =
|
|
{ .as_array = { 1, 2, 3 } };
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id lis302dl_spi_dt_ids[] = {
|
|
{ .compatible = "st,lis302dl-spi" },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, lis302dl_spi_dt_ids);
|
|
#endif
|
|
|
|
static int lis302dl_spi_probe(struct spi_device *spi)
|
|
{
|
|
int ret;
|
|
|
|
spi->bits_per_word = 8;
|
|
spi->mode = SPI_MODE_0;
|
|
ret = spi_setup(spi);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
lis3_dev.bus_priv = spi;
|
|
lis3_dev.init = lis3_spi_init;
|
|
lis3_dev.read = lis3_spi_read;
|
|
lis3_dev.write = lis3_spi_write;
|
|
lis3_dev.irq = spi->irq;
|
|
lis3_dev.ac = lis3lv02d_axis_normal;
|
|
lis3_dev.pdata = spi->dev.platform_data;
|
|
|
|
#ifdef CONFIG_OF
|
|
if (of_match_device(lis302dl_spi_dt_ids, &spi->dev)) {
|
|
lis3_dev.of_node = spi->dev.of_node;
|
|
ret = lis3lv02d_init_dt(&lis3_dev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
#endif
|
|
spi_set_drvdata(spi, &lis3_dev);
|
|
|
|
return lis3lv02d_init_device(&lis3_dev);
|
|
}
|
|
|
|
static int lis302dl_spi_remove(struct spi_device *spi)
|
|
{
|
|
struct lis3lv02d *lis3 = spi_get_drvdata(spi);
|
|
lis3lv02d_joystick_disable(lis3);
|
|
lis3lv02d_poweroff(lis3);
|
|
|
|
return lis3lv02d_remove_fs(&lis3_dev);
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int lis3lv02d_spi_suspend(struct device *dev)
|
|
{
|
|
struct spi_device *spi = to_spi_device(dev);
|
|
struct lis3lv02d *lis3 = spi_get_drvdata(spi);
|
|
|
|
if (!lis3->pdata || !lis3->pdata->wakeup_flags)
|
|
lis3lv02d_poweroff(&lis3_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lis3lv02d_spi_resume(struct device *dev)
|
|
{
|
|
struct spi_device *spi = to_spi_device(dev);
|
|
struct lis3lv02d *lis3 = spi_get_drvdata(spi);
|
|
|
|
if (!lis3->pdata || !lis3->pdata->wakeup_flags)
|
|
lis3lv02d_poweron(lis3);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(lis3lv02d_spi_pm, lis3lv02d_spi_suspend,
|
|
lis3lv02d_spi_resume);
|
|
|
|
static struct spi_driver lis302dl_spi_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.pm = &lis3lv02d_spi_pm,
|
|
.of_match_table = of_match_ptr(lis302dl_spi_dt_ids),
|
|
},
|
|
.probe = lis302dl_spi_probe,
|
|
.remove = lis302dl_spi_remove,
|
|
};
|
|
|
|
module_spi_driver(lis302dl_spi_driver);
|
|
|
|
MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
|
|
MODULE_DESCRIPTION("lis3lv02d SPI glue layer");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("spi:" DRV_NAME);
|