e0626e3844
This makes it consistent with other buses (platform, i2c, vio, ...). I'm not sure why we use the prefixes, but there must be a reason. This was easy enough to do it, and I did it. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Jean Delvare <khali@linux-fr.org> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Dmitry Torokhov <dtor@mail.ru> Cc: Samuel Ortiz <sameo@openedhand.com> Cc: "John W. Linville" <linville@tuxdriver.com> Acked-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
143 lines
3.1 KiB
C
143 lines
3.1 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/init.h>
|
|
#include <linux/err.h>
|
|
#include <linux/input.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/spi/spi.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;
|
|
return lis3->write(lis3, CTRL_REG1, reg);
|
|
}
|
|
|
|
static struct axis_conversion lis3lv02d_axis_normal = { 1, 2, 3 };
|
|
|
|
static int __devinit 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;
|
|
spi_set_drvdata(spi, &lis3_dev);
|
|
|
|
return lis3lv02d_init_device(&lis3_dev);
|
|
}
|
|
|
|
static int __devexit lis302dl_spi_remove(struct spi_device *spi)
|
|
{
|
|
struct lis3lv02d *lis3 = spi_get_drvdata(spi);
|
|
lis3lv02d_joystick_disable();
|
|
lis3lv02d_poweroff(lis3);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int lis3lv02d_spi_suspend(struct spi_device *spi, pm_message_t mesg)
|
|
{
|
|
struct lis3lv02d *lis3 = spi_get_drvdata(spi);
|
|
|
|
if (!lis3->pdata->wakeup_flags)
|
|
lis3lv02d_poweroff(&lis3_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lis3lv02d_spi_resume(struct spi_device *spi)
|
|
{
|
|
struct lis3lv02d *lis3 = spi_get_drvdata(spi);
|
|
|
|
if (!lis3->pdata->wakeup_flags)
|
|
lis3lv02d_poweron(lis3);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
#define lis3lv02d_spi_suspend NULL
|
|
#define lis3lv02d_spi_resume NULL
|
|
#endif
|
|
|
|
static struct spi_driver lis302dl_spi_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = lis302dl_spi_probe,
|
|
.remove = __devexit_p(lis302dl_spi_remove),
|
|
.suspend = lis3lv02d_spi_suspend,
|
|
.resume = lis3lv02d_spi_resume,
|
|
};
|
|
|
|
static int __init lis302dl_init(void)
|
|
{
|
|
return spi_register_driver(&lis302dl_spi_driver);
|
|
}
|
|
|
|
static void __exit lis302dl_exit(void)
|
|
{
|
|
spi_unregister_driver(&lis302dl_spi_driver);
|
|
}
|
|
|
|
module_init(lis302dl_init);
|
|
module_exit(lis302dl_exit);
|
|
|
|
MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
|
|
MODULE_DESCRIPTION("lis3lv02d SPI glue layer");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("spi:" DRV_NAME);
|