tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 2009-2010 Pengutronix
3 * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
4 *
5 * loosely based on an earlier driver that has
6 * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
7 *
8 * This program is free software; you can redistribute it and/or modify it under
9 * the terms of the GNU General Public License version 2 as published by the
10 * Free Software Foundation.
11 */
12
13#include <linux/slab.h>
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/mutex.h>
17#include <linux/interrupt.h>
18#include <linux/mfd/core.h>
19#include <linux/mfd/mc13xxx.h>
20#include <linux/of.h>
21#include <linux/of_device.h>
22#include <linux/of_gpio.h>
23#include <linux/err.h>
24#include <linux/spi/spi.h>
25
26#include "mc13xxx.h"
27
28static const struct spi_device_id mc13xxx_device_id[] = {
29 {
30 .name = "mc13783",
31 .driver_data = MC13XXX_ID_MC13783,
32 }, {
33 .name = "mc13892",
34 .driver_data = MC13XXX_ID_MC13892,
35 }, {
36 /* sentinel */
37 }
38};
39MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
40
41static const struct of_device_id mc13xxx_dt_ids[] = {
42 { .compatible = "fsl,mc13783", .data = (void *) MC13XXX_ID_MC13783, },
43 { .compatible = "fsl,mc13892", .data = (void *) MC13XXX_ID_MC13892, },
44 { /* sentinel */ }
45};
46MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
47
48static struct regmap_config mc13xxx_regmap_spi_config = {
49 .reg_bits = 7,
50 .pad_bits = 1,
51 .val_bits = 24,
52
53 .max_register = MC13XXX_NUMREGS,
54
55 .cache_type = REGCACHE_NONE,
56};
57
58static int mc13xxx_spi_probe(struct spi_device *spi)
59{
60 const struct of_device_id *of_id;
61 struct spi_driver *sdrv = to_spi_driver(spi->dev.driver);
62 struct mc13xxx *mc13xxx;
63 struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev);
64 int ret;
65
66 of_id = of_match_device(mc13xxx_dt_ids, &spi->dev);
67 if (of_id)
68 sdrv->id_table = &mc13xxx_device_id[(enum mc13xxx_id) of_id->data];
69
70 mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
71 if (!mc13xxx)
72 return -ENOMEM;
73
74 dev_set_drvdata(&spi->dev, mc13xxx);
75 spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
76 spi->bits_per_word = 32;
77
78 mc13xxx->dev = &spi->dev;
79 mutex_init(&mc13xxx->lock);
80
81 mc13xxx->regmap = regmap_init_spi(spi, &mc13xxx_regmap_spi_config);
82 if (IS_ERR(mc13xxx->regmap)) {
83 ret = PTR_ERR(mc13xxx->regmap);
84 dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
85 ret);
86 dev_set_drvdata(&spi->dev, NULL);
87 kfree(mc13xxx);
88 return ret;
89 }
90
91 ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq);
92
93 if (ret) {
94 dev_set_drvdata(&spi->dev, NULL);
95 } else {
96 const struct spi_device_id *devid =
97 spi_get_device_id(spi);
98 if (!devid || devid->driver_data != mc13xxx->ictype)
99 dev_warn(mc13xxx->dev,
100 "device id doesn't match auto detection!\n");
101 }
102
103 return ret;
104}
105
106static int __devexit mc13xxx_spi_remove(struct spi_device *spi)
107{
108 struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev);
109
110 mc13xxx_common_cleanup(mc13xxx);
111
112 return 0;
113}
114
115static struct spi_driver mc13xxx_spi_driver = {
116 .id_table = mc13xxx_device_id,
117 .driver = {
118 .name = "mc13xxx",
119 .owner = THIS_MODULE,
120 .of_match_table = mc13xxx_dt_ids,
121 },
122 .probe = mc13xxx_spi_probe,
123 .remove = __devexit_p(mc13xxx_spi_remove),
124};
125
126static int __init mc13xxx_init(void)
127{
128 return spi_register_driver(&mc13xxx_spi_driver);
129}
130subsys_initcall(mc13xxx_init);
131
132static void __exit mc13xxx_exit(void)
133{
134 spi_unregister_driver(&mc13xxx_spi_driver);
135}
136module_exit(mc13xxx_exit);
137
138MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
139MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
140MODULE_LICENSE("GPL v2");