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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 | ||
28 | static 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 | }; | |
39 | MODULE_DEVICE_TABLE(spi, mc13xxx_device_id); | |
40 | ||
41 | static 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 | }; | |
46 | MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids); | |
47 | ||
48 | static 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 | ||
58 | static 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 | ||
106 | static 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 | ||
115 | static 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 | ||
126 | static int __init mc13xxx_init(void) | |
127 | { | |
128 | return spi_register_driver(&mc13xxx_spi_driver); | |
129 | } | |
130 | subsys_initcall(mc13xxx_init); | |
131 | ||
132 | static void __exit mc13xxx_exit(void) | |
133 | { | |
134 | spi_unregister_driver(&mc13xxx_spi_driver); | |
135 | } | |
136 | module_exit(mc13xxx_exit); | |
137 | ||
138 | MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC"); | |
139 | MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>"); | |
140 | MODULE_LICENSE("GPL v2"); |