[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/mfd/wm831x-spi.c b/ap/os/linux/linux-3.4.x/drivers/mfd/wm831x-spi.c
new file mode 100644
index 0000000..4bceee9
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/mfd/wm831x-spi.c
@@ -0,0 +1,126 @@
+/*
+ * 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 __devinit 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->bits_per_word = 16;
+ spi->mode = SPI_MODE_0;
+
+ dev_set_drvdata(&spi->dev, 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 __devexit wm831x_spi_remove(struct spi_device *spi)
+{
+ struct wm831x *wm831x = dev_get_drvdata(&spi->dev);
+
+ 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 void wm831x_spi_shutdown(struct spi_device *spi)
+{
+ struct wm831x *wm831x = dev_get_drvdata(&spi->dev);
+
+ wm831x_device_shutdown(wm831x);
+}
+
+static const struct dev_pm_ops wm831x_spi_pm = {
+ .freeze = wm831x_spi_suspend,
+ .suspend = wm831x_spi_suspend,
+};
+
+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",
+ .owner = THIS_MODULE,
+ .pm = &wm831x_spi_pm,
+ },
+ .id_table = wm831x_spi_ids,
+ .probe = wm831x_spi_probe,
+ .remove = __devexit_p(wm831x_spi_remove),
+ .shutdown = wm831x_spi_shutdown,
+};
+
+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");