ACPI: scan: Make acpi_bus_get_device() clear return pointer on error
[platform/kernel/linux-rpi.git] / drivers / mfd / tps65912-spi.c
1 /*
2  * SPI access driver for TI TPS65912x PMICs
3  *
4  * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
5  *      Andrew F. Davis <afd@ti.com>
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  *
11  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
12  * kind, whether expressed or implied; without even the implied warranty
13  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License version 2 for more details.
15  *
16  * Based on the TPS65218 driver and the previous TPS65912 driver by
17  * Margarita Olaya Cabrera <magi@slimlogic.co.uk>
18  */
19
20 #include <linux/module.h>
21 #include <linux/regmap.h>
22 #include <linux/spi/spi.h>
23
24 #include <linux/mfd/tps65912.h>
25
26 static const struct of_device_id tps65912_spi_of_match_table[] = {
27         { .compatible = "ti,tps65912", },
28         { /* sentinel */ }
29 };
30 MODULE_DEVICE_TABLE(of, tps65912_spi_of_match_table);
31
32 static int tps65912_spi_probe(struct spi_device *spi)
33 {
34         struct tps65912 *tps;
35
36         tps = devm_kzalloc(&spi->dev, sizeof(*tps), GFP_KERNEL);
37         if (!tps)
38                 return -ENOMEM;
39
40         spi_set_drvdata(spi, tps);
41         tps->dev = &spi->dev;
42         tps->irq = spi->irq;
43
44         tps->regmap = devm_regmap_init_spi(spi, &tps65912_regmap_config);
45         if (IS_ERR(tps->regmap)) {
46                 dev_err(tps->dev, "Failed to initialize register map\n");
47                 return PTR_ERR(tps->regmap);
48         }
49
50         return tps65912_device_init(tps);
51 }
52
53 static int tps65912_spi_remove(struct spi_device *spi)
54 {
55         struct tps65912 *tps = spi_get_drvdata(spi);
56
57         return tps65912_device_exit(tps);
58 }
59
60 static const struct spi_device_id tps65912_spi_id_table[] = {
61         { "tps65912", 0 },
62         { /* sentinel */ }
63 };
64 MODULE_DEVICE_TABLE(spi, tps65912_spi_id_table);
65
66 static struct spi_driver tps65912_spi_driver = {
67         .driver         = {
68                 .name   = "tps65912",
69                 .of_match_table = tps65912_spi_of_match_table,
70         },
71         .probe          = tps65912_spi_probe,
72         .remove         = tps65912_spi_remove,
73         .id_table       = tps65912_spi_id_table,
74 };
75 module_spi_driver(tps65912_spi_driver);
76
77 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
78 MODULE_DESCRIPTION("TPS65912x SPI Interface Driver");
79 MODULE_LICENSE("GPL v2");