mirror of https://gitee.com/openkylin/linux.git
141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
/*
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* Copyright 2009-2010 Pengutronix
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* Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
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*
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* loosely based on an earlier driver that has
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* Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License version 2 as published by the
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* Free Software Foundation.
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*/
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/mutex.h>
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#include <linux/interrupt.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/mc13xxx.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/err.h>
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#include <linux/spi/spi.h>
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#include "mc13xxx.h"
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static const struct spi_device_id mc13xxx_device_id[] = {
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{
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.name = "mc13783",
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.driver_data = MC13XXX_ID_MC13783,
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}, {
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.name = "mc13892",
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.driver_data = MC13XXX_ID_MC13892,
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}, {
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/* sentinel */
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}
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};
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MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
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static const struct of_device_id mc13xxx_dt_ids[] = {
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{ .compatible = "fsl,mc13783", .data = (void *) MC13XXX_ID_MC13783, },
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{ .compatible = "fsl,mc13892", .data = (void *) MC13XXX_ID_MC13892, },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
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static struct regmap_config mc13xxx_regmap_spi_config = {
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.reg_bits = 7,
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.pad_bits = 1,
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.val_bits = 24,
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.max_register = MC13XXX_NUMREGS,
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.cache_type = REGCACHE_NONE,
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};
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static int mc13xxx_spi_probe(struct spi_device *spi)
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{
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const struct of_device_id *of_id;
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struct spi_driver *sdrv = to_spi_driver(spi->dev.driver);
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struct mc13xxx *mc13xxx;
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struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev);
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int ret;
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of_id = of_match_device(mc13xxx_dt_ids, &spi->dev);
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if (of_id)
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sdrv->id_table = &mc13xxx_device_id[(enum mc13xxx_id) of_id->data];
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mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
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if (!mc13xxx)
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return -ENOMEM;
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dev_set_drvdata(&spi->dev, mc13xxx);
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spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
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spi->bits_per_word = 32;
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mc13xxx->dev = &spi->dev;
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mutex_init(&mc13xxx->lock);
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mc13xxx->regmap = regmap_init_spi(spi, &mc13xxx_regmap_spi_config);
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if (IS_ERR(mc13xxx->regmap)) {
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ret = PTR_ERR(mc13xxx->regmap);
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dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
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ret);
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dev_set_drvdata(&spi->dev, NULL);
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kfree(mc13xxx);
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return ret;
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}
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ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq);
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if (ret) {
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dev_set_drvdata(&spi->dev, NULL);
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} else {
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const struct spi_device_id *devid =
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spi_get_device_id(spi);
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if (!devid || devid->driver_data != mc13xxx->ictype)
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dev_warn(mc13xxx->dev,
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"device id doesn't match auto detection!\n");
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}
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return ret;
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}
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static int __devexit mc13xxx_spi_remove(struct spi_device *spi)
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{
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struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev);
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mc13xxx_common_cleanup(mc13xxx);
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return 0;
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}
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static struct spi_driver mc13xxx_spi_driver = {
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.id_table = mc13xxx_device_id,
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.driver = {
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.name = "mc13xxx",
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.owner = THIS_MODULE,
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.of_match_table = mc13xxx_dt_ids,
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},
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.probe = mc13xxx_spi_probe,
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.remove = __devexit_p(mc13xxx_spi_remove),
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};
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static int __init mc13xxx_init(void)
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{
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return spi_register_driver(&mc13xxx_spi_driver);
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}
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subsys_initcall(mc13xxx_init);
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static void __exit mc13xxx_exit(void)
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{
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spi_unregister_driver(&mc13xxx_spi_driver);
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}
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module_exit(mc13xxx_exit);
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MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
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MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
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MODULE_LICENSE("GPL v2");
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