提交 bb233fdf 编写于 作者: D Daniel Mack 提交者: Linus Torvalds

lis3: SPI transport layer

Make use of the new abstraction layer and add a new transport layer for
spi.  Works fine on a PXA based board.
Signed-off-by: NDaniel Mack <daniel@caiaq.de>
Acked-by: NPavel Machek <pavel@ucw.cz>
Acked-by: NEric Piel <eric.piel@tremplin-utc.net>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 a38da2ed
......@@ -932,6 +932,22 @@ config SENSORS_LIS3LV02D
Say Y here if you have an applicable laptop and want to experience
the awesome power of lis3lv02d.
config SENSORS_LIS3_SPI
tristate "STMicroeletronics LIS3LV02Dx three-axis digital accelerometer (SPI)"
depends on !ACPI && SPI_MASTER && INPUT
default n
help
This driver provides support for the LIS3LV02Dx accelerometer connected
via SPI. The accelerometer data is readable via
/sys/devices/platform/lis3lv02d.
This driver also provides an absolute input class device, allowing
the laptop to act as a pinball machine-esque joystick.
This driver can also be built as modules. If so, the core module
will be called lis3lv02d and a specific module for the SPI transport
is called lis3lv02d_spi.
config SENSORS_APPLESMC
tristate "Apple SMC (Motion sensor, light sensor, keyboard backlight)"
depends on INPUT && X86
......
......@@ -52,6 +52,7 @@ obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o
obj-$(CONFIG_SENSORS_IT87) += it87.o
obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
obj-$(CONFIG_SENSORS_LIS3LV02D) += lis3lv02d.o hp_accel.o
obj-$(CONFIG_SENSORS_LIS3_SPI) += lis3lv02d.o lis3lv02d_spi.o
obj-$(CONFIG_SENSORS_LM63) += lm63.o
obj-$(CONFIG_SENSORS_LM70) += lm70.o
obj-$(CONFIG_SENSORS_LM75) += lm75.o
......
/*
* 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, &reg);
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;
spi_set_drvdata(spi, &lis3_dev);
ret = lis3lv02d_init_device(&lis3_dev);
return ret;
}
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;
}
static struct spi_driver lis302dl_spi_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
.probe = lis302dl_spi_probe,
.remove = __devexit_p(lis302dl_spi_remove),
};
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");
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