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author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-19 16:36:18 +0100 |
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committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-23 13:30:42 +0100 |
commit | a15123c708a364cc70c5db0ef56e6fab8268bf68 (patch) | |
tree | a3ccf858de07c372045b15012c1bfd87f96fa9f8 /drivers/mfd/arizona-spi.c | |
parent | c6f756223ad6bf5b71f1b9454b092f3dbe94900f (diff) | |
download | linux-stable-a15123c708a364cc70c5db0ef56e6fab8268bf68.tar.gz linux-stable-a15123c708a364cc70c5db0ef56e6fab8268bf68.tar.bz2 linux-stable-a15123c708a364cc70c5db0ef56e6fab8268bf68.zip |
mfd: arizona: SPI bus interface
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>
Diffstat (limited to 'drivers/mfd/arizona-spi.c')
-rw-r--r-- | drivers/mfd/arizona-spi.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/drivers/mfd/arizona-spi.c b/drivers/mfd/arizona-spi.c new file mode 100644 index 000000000000..f4bedaf875e6 --- /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"); |