| /* |
| * wm831x-spi.c -- SPI access for Wolfson WM831x PMICs |
| * |
| * Copyright 2009,2010 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 as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/pm.h> |
| #include <linux/spi/spi.h> |
| #include <linux/regmap.h> |
| #include <linux/err.h> |
| |
| #include <linux/mfd/wm831x/core.h> |
| |
| static int wm831x_spi_probe(struct spi_device *spi) |
| { |
| const struct spi_device_id *id = spi_get_device_id(spi); |
| struct wm831x *wm831x; |
| enum wm831x_parent type; |
| int ret; |
| |
| type = (enum wm831x_parent)id->driver_data; |
| |
| wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL); |
| if (wm831x == NULL) |
| return -ENOMEM; |
| |
| spi->mode = SPI_MODE_0; |
| |
| spi_set_drvdata(spi, wm831x); |
| wm831x->dev = &spi->dev; |
| |
| wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config); |
| if (IS_ERR(wm831x->regmap)) { |
| ret = PTR_ERR(wm831x->regmap); |
| dev_err(wm831x->dev, "Failed to allocate register map: %d\n", |
| ret); |
| return ret; |
| } |
| |
| return wm831x_device_init(wm831x, type, spi->irq); |
| } |
| |
| static int wm831x_spi_remove(struct spi_device *spi) |
| { |
| struct wm831x *wm831x = spi_get_drvdata(spi); |
| |
| wm831x_device_exit(wm831x); |
| |
| return 0; |
| } |
| |
| static int wm831x_spi_suspend(struct device *dev) |
| { |
| struct wm831x *wm831x = dev_get_drvdata(dev); |
| |
| return wm831x_device_suspend(wm831x); |
| } |
| |
| static int wm831x_spi_poweroff(struct device *dev) |
| { |
| struct wm831x *wm831x = dev_get_drvdata(dev); |
| |
| wm831x_device_shutdown(wm831x); |
| |
| return 0; |
| } |
| |
| static const struct dev_pm_ops wm831x_spi_pm = { |
| .freeze = wm831x_spi_suspend, |
| .suspend = wm831x_spi_suspend, |
| .poweroff = wm831x_spi_poweroff, |
| }; |
| |
| static const struct spi_device_id wm831x_spi_ids[] = { |
| { "wm8310", WM8310 }, |
| { "wm8311", WM8311 }, |
| { "wm8312", WM8312 }, |
| { "wm8320", WM8320 }, |
| { "wm8321", WM8321 }, |
| { "wm8325", WM8325 }, |
| { "wm8326", WM8326 }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(spi, wm831x_spi_ids); |
| |
| static struct spi_driver wm831x_spi_driver = { |
| .driver = { |
| .name = "wm831x", |
| .pm = &wm831x_spi_pm, |
| }, |
| .id_table = wm831x_spi_ids, |
| .probe = wm831x_spi_probe, |
| .remove = wm831x_spi_remove, |
| }; |
| |
| static int __init wm831x_spi_init(void) |
| { |
| int ret; |
| |
| ret = spi_register_driver(&wm831x_spi_driver); |
| if (ret != 0) |
| pr_err("Failed to register WM831x SPI driver: %d\n", ret); |
| |
| return 0; |
| } |
| subsys_initcall(wm831x_spi_init); |
| |
| static void __exit wm831x_spi_exit(void) |
| { |
| spi_unregister_driver(&wm831x_spi_driver); |
| } |
| module_exit(wm831x_spi_exit); |
| |
| MODULE_DESCRIPTION("SPI support for WM831x/2x AudioPlus PMICs"); |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Mark Brown"); |