2ee321440e
The axis-mapping of lis3dev device on many (rather most) HP machines doesn't follow the standard. When each new model appears, users need to adjust again. Testing this requires the rebuild of kernel, thus it's not trivial for end-users. This patch adds a module parameter "axes" to allow a custom axis-mapping without patching and recompiling the kernel driver. User can pass the parameter such as axes=3,2,1. Also it can be changed via sysfs. Signed-off-by: Takashi Iwai <tiwai@suse.de> Acked-by: Eric Piel <eric.piel@tremplin-utc.net> Cc: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
145 lines
3.1 KiB
C
145 lines
3.1 KiB
C
/*
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* lis3lv02d_spi - SPI glue layer for lis3lv02d
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*
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* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* publishhed by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/spi/spi.h>
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#include "lis3lv02d.h"
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#define DRV_NAME "lis3lv02d_spi"
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#define LIS3_SPI_READ 0x80
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static int lis3_spi_read(struct lis3lv02d *lis3, int reg, u8 *v)
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{
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struct spi_device *spi = lis3->bus_priv;
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int ret = spi_w8r8(spi, reg | LIS3_SPI_READ);
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if (ret < 0)
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return -EINVAL;
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*v = (u8) ret;
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return 0;
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}
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static int lis3_spi_write(struct lis3lv02d *lis3, int reg, u8 val)
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{
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u8 tmp[2] = { reg, val };
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struct spi_device *spi = lis3->bus_priv;
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return spi_write(spi, tmp, sizeof(tmp));
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}
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static int lis3_spi_init(struct lis3lv02d *lis3)
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{
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u8 reg;
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int ret;
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/* power up the device */
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ret = lis3->read(lis3, CTRL_REG1, ®);
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if (ret < 0)
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return ret;
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reg |= CTRL1_PD0;
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return lis3->write(lis3, CTRL_REG1, reg);
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}
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static union axis_conversion lis3lv02d_axis_normal =
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{ .as_array = { 1, 2, 3 } };
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static int __devinit lis302dl_spi_probe(struct spi_device *spi)
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{
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int ret;
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spi->bits_per_word = 8;
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spi->mode = SPI_MODE_0;
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ret = spi_setup(spi);
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if (ret < 0)
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return ret;
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lis3_dev.bus_priv = spi;
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lis3_dev.init = lis3_spi_init;
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lis3_dev.read = lis3_spi_read;
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lis3_dev.write = lis3_spi_write;
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lis3_dev.irq = spi->irq;
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lis3_dev.ac = lis3lv02d_axis_normal;
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lis3_dev.pdata = spi->dev.platform_data;
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spi_set_drvdata(spi, &lis3_dev);
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return lis3lv02d_init_device(&lis3_dev);
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}
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static int __devexit lis302dl_spi_remove(struct spi_device *spi)
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{
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struct lis3lv02d *lis3 = spi_get_drvdata(spi);
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lis3lv02d_joystick_disable();
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lis3lv02d_poweroff(lis3);
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return lis3lv02d_remove_fs(&lis3_dev);
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}
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#ifdef CONFIG_PM
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static int lis3lv02d_spi_suspend(struct spi_device *spi, pm_message_t mesg)
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{
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struct lis3lv02d *lis3 = spi_get_drvdata(spi);
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if (!lis3->pdata || !lis3->pdata->wakeup_flags)
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lis3lv02d_poweroff(&lis3_dev);
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return 0;
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}
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static int lis3lv02d_spi_resume(struct spi_device *spi)
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{
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struct lis3lv02d *lis3 = spi_get_drvdata(spi);
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if (!lis3->pdata || !lis3->pdata->wakeup_flags)
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lis3lv02d_poweron(lis3);
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return 0;
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}
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#else
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#define lis3lv02d_spi_suspend NULL
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#define lis3lv02d_spi_resume NULL
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#endif
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static struct spi_driver lis302dl_spi_driver = {
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.driver = {
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.name = DRV_NAME,
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.owner = THIS_MODULE,
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},
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.probe = lis302dl_spi_probe,
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.remove = __devexit_p(lis302dl_spi_remove),
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.suspend = lis3lv02d_spi_suspend,
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.resume = lis3lv02d_spi_resume,
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};
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static int __init lis302dl_init(void)
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{
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return spi_register_driver(&lis302dl_spi_driver);
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}
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static void __exit lis302dl_exit(void)
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{
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spi_unregister_driver(&lis302dl_spi_driver);
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}
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module_init(lis302dl_init);
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module_exit(lis302dl_exit);
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MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
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MODULE_DESCRIPTION("lis3lv02d SPI glue layer");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("spi:" DRV_NAME);
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