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    Subject[PATCH 5/7] mfd: arizona: SPI bus interface
    Date
    Several forthcoming Wolfson devices are based on a common platform
    known as Arizona allowing a great deal of reuse of driver code. This
    patch adds SPI bus interface code for the devices.

    Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
    ---
    drivers/mfd/arizona-spi.c | 91 +++++++++++++++++++++++++++++++++++++++++++++
    1 file changed, 91 insertions(+)
    create mode 100644 drivers/mfd/arizona-spi.c

    diff --git a/drivers/mfd/arizona-spi.c b/drivers/mfd/arizona-spi.c
    new file mode 100644
    index 0000000..f4bedaf
    --- /dev/null
    +++ b/drivers/mfd/arizona-spi.c
    @@ -0,0 +1,91 @@
    +/*
    + * arizona-spi.c -- Arizona SPI bus interface
    + *
    + * Copyright 2012 Wolfson Microelectronics plc
    + *
    + * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 as
    + * published by the Free Software Foundation.
    + */
    +
    +#include <linux/err.h>
    +#include <linux/module.h>
    +#include <linux/pm_runtime.h>
    +#include <linux/regmap.h>
    +#include <linux/regulator/consumer.h>
    +#include <linux/slab.h>
    +#include <linux/spi/spi.h>
    +
    +#include <linux/mfd/arizona/core.h>
    +
    +#include "arizona.h"
    +
    +static int __devinit arizona_spi_probe(struct spi_device *spi)
    +{
    + const struct spi_device_id *id = spi_get_device_id(spi);
    + struct arizona *arizona;
    + const struct regmap_config *regmap_config;
    + int ret;
    +
    + switch (id->driver_data) {
    +#ifdef CONFIG_MFD_WM5102
    + case WM5102:
    + regmap_config = &wm5102_spi_regmap;
    + break;
    +#endif
    + default:
    + dev_err(&spi->dev, "Unknown device type %ld\n",
    + id->driver_data);
    + return -EINVAL;
    + }
    +
    + arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
    + if (arizona == NULL)
    + return -ENOMEM;
    +
    + arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
    + if (IS_ERR(arizona->regmap)) {
    + ret = PTR_ERR(arizona->regmap);
    + dev_err(&spi->dev, "Failed to allocate register map: %d\n",
    + ret);
    + return ret;
    + }
    +
    + arizona->type = id->driver_data;
    + arizona->dev = &spi->dev;
    + arizona->irq = spi->irq;
    +
    + return arizona_dev_init(arizona);
    +}
    +
    +static int __devexit arizona_spi_remove(struct spi_device *spi)
    +{
    + struct arizona *arizona = dev_get_drvdata(&spi->dev);
    + arizona_dev_exit(arizona);
    + return 0;
    +}
    +
    +static const struct spi_device_id arizona_spi_ids[] = {
    + { "wm5102", WM5102 },
    + { },
    +};
    +MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
    +
    +static struct spi_driver arizona_spi_driver = {
    + .driver = {
    + .name = "arizona",
    + .owner = THIS_MODULE,
    + .pm = &arizona_pm_ops,
    + },
    + .probe = arizona_spi_probe,
    + .remove = __devexit_p(arizona_spi_remove),
    + .id_table = arizona_spi_ids,
    +};
    +
    +module_spi_driver(arizona_spi_driver);
    +
    +MODULE_DESCRIPTION("Arizona SPI bus interface");
    +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
    +MODULE_LICENSE("GPL");
    --
    1.7.10


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