[linux-2.6-block.git] / drivers / misc / lis3lv02d / lis3lv02d_spi.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * lis3lv02d_spi - SPI glue layer for lis3lv02d
 *
 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
 */

#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, &reg);
	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 void lis302dl_spi_remove(struct spi_device *spi)
{
	struct lis3lv02d *lis3 = spi_get_drvdata(spi);
	lis3lv02d_joystick_disable(lis3);
	lis3lv02d_poweroff(lis3);

	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);
Commit	Line	Data
1d0ea069	1	// SPDX-License-Identifier: GPL-2.0-only
bb233fdf DM	2	/*
	3	* lis3lv02d_spi - SPI glue layer for lis3lv02d
	4	*
	5	* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
bb233fdf DM	6	*/
	7
	8	#include <linux/module.h>
	9	#include <linux/kernel.h>
bb233fdf DM	10	#include <linux/err.h>
	11	#include <linux/input.h>
	12	#include <linux/interrupt.h>
	13	#include <linux/workqueue.h>
	14	#include <linux/spi/spi.h>
4e9be650	15	#include <linux/pm.h>
4bcdea86 DM	16	#include <linux/of.h>
4bcdea86 DM	17	#include <linux/of_platform.h>
79df8d27	18	#include <linux/of_device.h>
bb233fdf DM	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, &reg);
	50	if (ret < 0)
	51	return ret;
	52
ed37d7f6	53	reg \|= CTRL1_PD0 \| CTRL1_Xen \| CTRL1_Yen \| CTRL1_Zen;
bb233fdf DM	54	return lis3->write(lis3, CTRL_REG1, reg);
	55	}
	56
2ee32144 TI	57	static union axis_conversion lis3lv02d_axis_normal =
2ee32144 TI	58	{ .as_array = { 1, 2, 3 } };
bb233fdf	59
4bcdea86	60	#ifdef CONFIG_OF
6893d9b5	61	static const struct of_device_id lis302dl_spi_dt_ids[] = {
4bcdea86 DM	62	{ .compatible = "st,lis302dl-spi" },
	63	{}
	64	};
	65	MODULE_DEVICE_TABLE(of, lis302dl_spi_dt_ids);
	66	#endif
	67
80c8ae28	68	static int lis302dl_spi_probe(struct spi_device *spi)
bb233fdf DM	69	{
	70	int ret;
	71
	72	spi->bits_per_word = 8;
	73	spi->mode = SPI_MODE_0;
	74	ret = spi_setup(spi);
	75	if (ret < 0)
	76	return ret;
	77
dc791f8a DM	78	lis3_dev.bus_priv = spi;
	79	lis3_dev.init = lis3_spi_init;
	80	lis3_dev.read = lis3_spi_read;
	81	lis3_dev.write = lis3_spi_write;
	82	lis3_dev.irq = spi->irq;
	83	lis3_dev.ac = lis3lv02d_axis_normal;
	84	lis3_dev.pdata = spi->dev.platform_data;
4bcdea86 DM	85
4bcdea86 DM	86	#ifdef CONFIG_OF
79df8d27	87	if (of_match_device(lis302dl_spi_dt_ids, &spi->dev)) {
4bcdea86	88	lis3_dev.of_node = spi->dev.of_node;
79df8d27 AC	89	ret = lis3lv02d_init_dt(&lis3_dev);
	90	if (ret)
	91	return ret;
	92	}
4bcdea86	93	#endif
bb233fdf DM	94	spi_set_drvdata(spi, &lis3_dev);
bb233fdf DM	95
dc791f8a	96	return lis3lv02d_init_device(&lis3_dev);
bb233fdf DM	97	}
bb233fdf DM	98
a0386bba	99	static void lis302dl_spi_remove(struct spi_device *spi)
bb233fdf DM	100	{
bb233fdf DM	101	struct lis3lv02d *lis3 = spi_get_drvdata(spi);
e1e5687d	102	lis3lv02d_joystick_disable(lis3);
bb233fdf	103	lis3lv02d_poweroff(lis3);
d82e23dc	104
4df4946d	105	lis3lv02d_remove_fs(&lis3_dev);
bb233fdf DM	106	}
bb233fdf DM	107
4e9be650 MB	108	#ifdef CONFIG_PM_SLEEP
4e9be650 MB	109	static int lis3lv02d_spi_suspend(struct device *dev)
2cd9645e	110	{
4e9be650	111	struct spi_device *spi = to_spi_device(dev);
2cd9645e DM	112	struct lis3lv02d *lis3 = spi_get_drvdata(spi);
2cd9645e DM	113
5facb097	114	if (!lis3->pdata \|\| !lis3->pdata->wakeup_flags)
2cd9645e DM	115	lis3lv02d_poweroff(&lis3_dev);
	116
	117	return 0;
	118	}
	119
4e9be650	120	static int lis3lv02d_spi_resume(struct device *dev)
2cd9645e	121	{
4e9be650	122	struct spi_device *spi = to_spi_device(dev);
2cd9645e DM	123	struct lis3lv02d *lis3 = spi_get_drvdata(spi);
2cd9645e DM	124
5facb097	125	if (!lis3->pdata \|\| !lis3->pdata->wakeup_flags)
2cd9645e DM	126	lis3lv02d_poweron(lis3);
	127
	128	return 0;
	129	}
2cd9645e DM	130	#endif
2cd9645e DM	131
4e9be650 MB	132	static SIMPLE_DEV_PM_OPS(lis3lv02d_spi_pm, lis3lv02d_spi_suspend,
	133	lis3lv02d_spi_resume);
	134
bb233fdf DM	135	static struct spi_driver lis302dl_spi_driver = {
	136	.driver = {
	137	.name = DRV_NAME,
4e9be650	138	.pm = &lis3lv02d_spi_pm,
4bcdea86	139	.of_match_table = of_match_ptr(lis302dl_spi_dt_ids),
bb233fdf DM	140	},
bb233fdf DM	141	.probe = lis302dl_spi_probe,
2d6bed9c	142	.remove = lis302dl_spi_remove,
bb233fdf DM	143	};
bb233fdf DM	144
a3dc3c9e	145	module_spi_driver(lis302dl_spi_driver);
bb233fdf DM	146
	147	MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
	148	MODULE_DESCRIPTION("lis3lv02d SPI glue layer");
	149	MODULE_LICENSE("GPL");
e0626e38	150	MODULE_ALIAS("spi:" DRV_NAME);