119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
/*
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* arizona-spi.c -- Arizona SPI bus interface
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*
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* Copyright 2012 Wolfson Microelectronics plc
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*
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* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/spi/spi.h>
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#include <linux/of.h>
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#include <linux/mfd/arizona/core.h>
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#include "arizona.h"
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static int arizona_spi_probe(struct spi_device *spi)
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{
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const struct spi_device_id *id = spi_get_device_id(spi);
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struct arizona *arizona;
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const struct regmap_config *regmap_config = NULL;
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unsigned long type;
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int ret;
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if (spi->dev.of_node)
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type = arizona_of_get_type(&spi->dev);
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else
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type = id->driver_data;
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switch (type) {
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case WM5102:
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if (IS_ENABLED(CONFIG_MFD_WM5102))
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regmap_config = &wm5102_spi_regmap;
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break;
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case WM5110:
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case WM8280:
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if (IS_ENABLED(CONFIG_MFD_WM5110))
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regmap_config = &wm5110_spi_regmap;
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break;
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case WM1831:
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case CS47L24:
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if (IS_ENABLED(CONFIG_MFD_CS47L24))
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regmap_config = &cs47l24_spi_regmap;
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break;
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default:
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dev_err(&spi->dev, "Unknown device type %ld\n", type);
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return -EINVAL;
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}
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if (!regmap_config) {
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dev_err(&spi->dev,
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"No kernel support for device type %ld\n", type);
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return -EINVAL;
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}
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arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
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if (arizona == NULL)
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return -ENOMEM;
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arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
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if (IS_ERR(arizona->regmap)) {
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ret = PTR_ERR(arizona->regmap);
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dev_err(&spi->dev, "Failed to allocate register map: %d\n",
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ret);
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return ret;
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}
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arizona->type = type;
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arizona->dev = &spi->dev;
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arizona->irq = spi->irq;
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return arizona_dev_init(arizona);
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}
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static int arizona_spi_remove(struct spi_device *spi)
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{
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struct arizona *arizona = spi_get_drvdata(spi);
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arizona_dev_exit(arizona);
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return 0;
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}
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static const struct spi_device_id arizona_spi_ids[] = {
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{ "wm5102", WM5102 },
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{ "wm5110", WM5110 },
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{ "wm8280", WM8280 },
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{ "wm1831", WM1831 },
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{ "cs47l24", CS47L24 },
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{ },
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};
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MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
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static struct spi_driver arizona_spi_driver = {
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.driver = {
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.name = "arizona",
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.pm = &arizona_pm_ops,
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.of_match_table = of_match_ptr(arizona_of_match),
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},
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.probe = arizona_spi_probe,
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.remove = arizona_spi_remove,
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.id_table = arizona_spi_ids,
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};
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module_spi_driver(arizona_spi_driver);
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MODULE_DESCRIPTION("Arizona SPI bus interface");
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MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
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MODULE_LICENSE("GPL");
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