Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 1 | /* |
| 2 | * arizona-spi.c -- Arizona SPI bus interface |
| 3 | * |
| 4 | * Copyright 2012 Wolfson Microelectronics plc |
| 5 | * |
| 6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/err.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/pm_runtime.h> |
| 16 | #include <linux/regmap.h> |
| 17 | #include <linux/regulator/consumer.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <linux/spi/spi.h> |
Sachin Kamat | 3d6d1d1 | 2013-10-16 14:26:56 +0530 | [diff] [blame] | 20 | #include <linux/of.h> |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 21 | |
| 22 | #include <linux/mfd/arizona/core.h> |
| 23 | |
| 24 | #include "arizona.h" |
| 25 | |
Bill Pemberton | f791be4 | 2012-11-19 13:23:04 -0500 | [diff] [blame] | 26 | static int arizona_spi_probe(struct spi_device *spi) |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 27 | { |
| 28 | const struct spi_device_id *id = spi_get_device_id(spi); |
| 29 | struct arizona *arizona; |
Richard Fitzgerald | b61c1ec | 2015-10-02 13:29:14 +0100 | [diff] [blame] | 30 | const struct regmap_config *regmap_config = NULL; |
Lee Jones | 942786e | 2014-07-02 14:28:46 +0100 | [diff] [blame] | 31 | unsigned long type; |
| 32 | int ret; |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 33 | |
Mark Brown | d781009 | 2013-03-25 00:11:27 +0000 | [diff] [blame] | 34 | if (spi->dev.of_node) |
| 35 | type = arizona_of_get_type(&spi->dev); |
| 36 | else |
| 37 | type = id->driver_data; |
| 38 | |
| 39 | switch (type) { |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 40 | case WM5102: |
Richard Fitzgerald | b61c1ec | 2015-10-02 13:29:14 +0100 | [diff] [blame] | 41 | if (IS_ENABLED(CONFIG_MFD_WM5102)) |
| 42 | regmap_config = &wm5102_spi_regmap; |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 43 | break; |
Mark Brown | e102bef | 2012-07-10 12:37:58 +0100 | [diff] [blame] | 44 | case WM5110: |
Richard Fitzgerald | e5d4ef0 | 2015-01-17 15:21:22 +0000 | [diff] [blame] | 45 | case WM8280: |
Richard Fitzgerald | b61c1ec | 2015-10-02 13:29:14 +0100 | [diff] [blame] | 46 | if (IS_ENABLED(CONFIG_MFD_WM5110)) |
| 47 | regmap_config = &wm5110_spi_regmap; |
Mark Brown | e102bef | 2012-07-10 12:37:58 +0100 | [diff] [blame] | 48 | break; |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 49 | default: |
Richard Fitzgerald | 2e44e28 | 2015-10-02 13:29:15 +0100 | [diff] [blame] | 50 | dev_err(&spi->dev, "Unknown device type %ld\n", type); |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 51 | return -EINVAL; |
| 52 | } |
| 53 | |
Richard Fitzgerald | b61c1ec | 2015-10-02 13:29:14 +0100 | [diff] [blame] | 54 | if (!regmap_config) { |
| 55 | dev_err(&spi->dev, |
| 56 | "No kernel support for device type %ld\n", type); |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 57 | return -EINVAL; |
| 58 | } |
| 59 | |
| 60 | arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL); |
| 61 | if (arizona == NULL) |
| 62 | return -ENOMEM; |
| 63 | |
| 64 | arizona->regmap = devm_regmap_init_spi(spi, regmap_config); |
| 65 | if (IS_ERR(arizona->regmap)) { |
| 66 | ret = PTR_ERR(arizona->regmap); |
| 67 | dev_err(&spi->dev, "Failed to allocate register map: %d\n", |
| 68 | ret); |
| 69 | return ret; |
| 70 | } |
| 71 | |
Richard Fitzgerald | 2e44e28 | 2015-10-02 13:29:15 +0100 | [diff] [blame] | 72 | arizona->type = type; |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 73 | arizona->dev = &spi->dev; |
| 74 | arizona->irq = spi->irq; |
| 75 | |
| 76 | return arizona_dev_init(arizona); |
| 77 | } |
| 78 | |
Bill Pemberton | 4740f73 | 2012-11-19 13:26:01 -0500 | [diff] [blame] | 79 | static int arizona_spi_remove(struct spi_device *spi) |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 80 | { |
Jingoo Han | e9642d5 | 2013-04-06 15:44:30 +0900 | [diff] [blame] | 81 | struct arizona *arizona = spi_get_drvdata(spi); |
Will Sheppard | 6f467e5 | 2014-10-15 09:38:47 +0100 | [diff] [blame] | 82 | |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 83 | arizona_dev_exit(arizona); |
Will Sheppard | 6f467e5 | 2014-10-15 09:38:47 +0100 | [diff] [blame] | 84 | |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | static const struct spi_device_id arizona_spi_ids[] = { |
| 89 | { "wm5102", WM5102 }, |
Mark Brown | e102bef | 2012-07-10 12:37:58 +0100 | [diff] [blame] | 90 | { "wm5110", WM5110 }, |
Richard Fitzgerald | e5d4ef0 | 2015-01-17 15:21:22 +0000 | [diff] [blame] | 91 | { "wm8280", WM8280 }, |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 92 | { }, |
| 93 | }; |
| 94 | MODULE_DEVICE_TABLE(spi, arizona_spi_ids); |
| 95 | |
| 96 | static struct spi_driver arizona_spi_driver = { |
| 97 | .driver = { |
| 98 | .name = "arizona", |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 99 | .pm = &arizona_pm_ops, |
Mark Brown | d781009 | 2013-03-25 00:11:27 +0000 | [diff] [blame] | 100 | .of_match_table = of_match_ptr(arizona_of_match), |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 101 | }, |
| 102 | .probe = arizona_spi_probe, |
Bill Pemberton | 8444921 | 2012-11-19 13:20:24 -0500 | [diff] [blame] | 103 | .remove = arizona_spi_remove, |
Mark Brown | a15123c | 2012-06-19 16:36:18 +0100 | [diff] [blame] | 104 | .id_table = arizona_spi_ids, |
| 105 | }; |
| 106 | |
| 107 | module_spi_driver(arizona_spi_driver); |
| 108 | |
| 109 | MODULE_DESCRIPTION("Arizona SPI bus interface"); |
| 110 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); |
| 111 | MODULE_LICENSE("GPL"); |