projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| bb233fdf DM |
1 | /* |
| 2 | * lis3lv02d_spi - SPI glue layer for lis3lv02d | |
| 3 | * | |
| 4 | * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> | |
| 5 | * | |
| 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. | |
| 9 | */ | |
| 10 | ||
| 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> | |
| 19 | ||
| 20 | #include "lis3lv02d.h" | |
| 21 | ||
| 22 | #define DRV_NAME "lis3lv02d_spi" | |
| 23 | #define LIS3_SPI_READ 0x80 | |
| 24 | ||
| 25 | static int lis3_spi_read(struct lis3lv02d *lis3, int reg, u8 *v) | |
| 26 | { | |
| 27 | struct spi_device *spi = lis3->bus_priv; | |
| 28 | int ret = spi_w8r8(spi, reg | LIS3_SPI_READ); | |
| 29 | if (ret < 0) | |
| 30 | return -EINVAL; | |
| 31 | ||
| 32 | *v = (u8) ret; | |
| 33 | return 0; | |
| 34 | } | |
| 35 | ||
| 36 | static int lis3_spi_write(struct lis3lv02d *lis3, int reg, u8 val) | |
| 37 | { | |
| 38 | u8 tmp[2] = { reg, val }; | |
| 39 | struct spi_device *spi = lis3->bus_priv; | |
| 40 | return spi_write(spi, tmp, sizeof(tmp)); | |
| 41 | } | |
| 42 | ||
| 43 | static int lis3_spi_init(struct lis3lv02d *lis3) | |
| 44 | { | |
| 45 | u8 reg; | |
| 46 | int ret; | |
| 47 | ||
| 48 | /* power up the device */ | |
| 49 | ret = lis3->read(lis3, CTRL_REG1, ®); | |
| 50 | if (ret < 0) | |
| 51 | return ret; | |
| 52 | ||
| 53 | reg |= CTRL1_PD0; | |
| 54 | return lis3->write(lis3, CTRL_REG1, reg); | |
| 55 | } | |
| 56 | ||
| 57 | static struct axis_conversion lis3lv02d_axis_normal = { 1, 2, 3 }; | |
| 58 | ||
| 59 | static int __devinit lis302dl_spi_probe(struct spi_device *spi) | |
| 60 | { | |
| 61 | int ret; | |
| 62 | ||
| 63 | spi->bits_per_word = 8; | |
| 64 | spi->mode = SPI_MODE_0; | |
| 65 | ret = spi_setup(spi); | |
| 66 | if (ret < 0) | |
| 67 | return ret; | |
| 68 | ||
| 69 | lis3_dev.bus_priv = spi; | |
| 70 | lis3_dev.init = lis3_spi_init; | |
| 71 | lis3_dev.read = lis3_spi_read; | |
| 72 | lis3_dev.write = lis3_spi_write; | |
| 73 | lis3_dev.irq = spi->irq; | |
| 74 | lis3_dev.ac = lis3lv02d_axis_normal; | |
| 75 | spi_set_drvdata(spi, &lis3_dev); | |
| 76 | ||
| 77 | ret = lis3lv02d_init_device(&lis3_dev); | |
| 78 | return ret; | |
| 79 | } | |
| 80 | ||
| 81 | static int __devexit lis302dl_spi_remove(struct spi_device *spi) | |
| 82 | { | |
| 83 | struct lis3lv02d *lis3 = spi_get_drvdata(spi); | |
| 84 | lis3lv02d_joystick_disable(); | |
| 85 | lis3lv02d_poweroff(lis3); | |
| 86 | return 0; | |
| 87 | } | |
| 88 | ||
| 89 | static struct spi_driver lis302dl_spi_driver = { | |
| 90 | .driver = { | |
| 91 | .name = DRV_NAME, | |
| 92 | .owner = THIS_MODULE, | |
| 93 | }, | |
| 94 | .probe = lis302dl_spi_probe, | |
| 95 | .remove = __devexit_p(lis302dl_spi_remove), | |
| 96 | }; | |
| 97 | ||
| 98 | static int __init lis302dl_init(void) | |
| 99 | { | |
| 100 | return spi_register_driver(&lis302dl_spi_driver); | |
| 101 | } | |
| 102 | ||
| 103 | static void __exit lis302dl_exit(void) | |
| 104 | { | |
| 105 | spi_unregister_driver(&lis302dl_spi_driver); | |
| 106 | } | |
| 107 | ||
| 108 | module_init(lis302dl_init); | |
| 109 | module_exit(lis302dl_exit); | |
| 110 | ||
| 111 | MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>"); | |
| 112 | MODULE_DESCRIPTION("lis3lv02d SPI glue layer"); | |
| 113 | MODULE_LICENSE("GPL"); | |
| 114 |