Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mfd / sky81452.c

diff --git a/kernel/drivers/mfd/sky81452.c b/kernel/drivers/mfd/sky81452.c
new file mode 100644 (file)
index 0000000..b0c9b04
--- /dev/null
+++ b/kernel/drivers/mfd/sky81452.c
@@ -0,0 +1,108 @@
+/*
+ * sky81452.c  SKY81452 MFD driver
+ *
+ * Copyright 2014 Skyworks Solutions Inc.
+ * Author : Gyungoh Yoo <jack.yoo@skyworksinc.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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/sky81452.h>
+
+static const struct regmap_config sky81452_config = {
+       .reg_bits = 8,
+       .val_bits = 8,
+};
+
+static int sky81452_probe(struct i2c_client *client,
+                               const struct i2c_device_id *id)
+{
+       struct device *dev = &client->dev;
+       const struct sky81452_platform_data *pdata = dev_get_platdata(dev);
+       struct mfd_cell cells[2];
+       struct regmap *regmap;
+       int ret;
+
+       if (!pdata) {
+               pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+               if (!pdata)
+                       return -ENOMEM;
+       }
+
+       regmap = devm_regmap_init_i2c(client, &sky81452_config);
+       if (IS_ERR(regmap)) {
+               dev_err(dev, "failed to initialize.err=%ld\n", PTR_ERR(regmap));
+               return PTR_ERR(regmap);
+       }
+
+       i2c_set_clientdata(client, regmap);
+
+       memset(cells, 0, sizeof(cells));
+       cells[0].name = "sky81452-backlight";
+       cells[0].of_compatible = "skyworks,sky81452-backlight";
+       cells[0].platform_data = pdata->bl_pdata;
+       cells[0].pdata_size = sizeof(*pdata->bl_pdata);
+       cells[1].name = "sky81452-regulator";
+       cells[1].platform_data = pdata->regulator_init_data;
+       cells[1].pdata_size = sizeof(*pdata->regulator_init_data);
+
+       ret = mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells), NULL, 0, NULL);
+       if (ret)
+               dev_err(dev, "failed to add child devices. err=%d\n", ret);
+
+       return ret;
+}
+
+static int sky81452_remove(struct i2c_client *client)
+{
+       mfd_remove_devices(&client->dev);
+       return 0;
+}
+
+static const struct i2c_device_id sky81452_ids[] = {
+       { "sky81452" },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, sky81452_ids);
+
+#ifdef CONFIG_OF
+static const struct of_device_id sky81452_of_match[] = {
+       { .compatible = "skyworks,sky81452", },
+       { }
+};
+MODULE_DEVICE_TABLE(of, sky81452_of_match);
+#endif
+
+static struct i2c_driver sky81452_driver = {
+       .driver = {
+               .name = "sky81452",
+               .of_match_table = of_match_ptr(sky81452_of_match),
+       },
+       .probe = sky81452_probe,
+       .remove = sky81452_remove,
+       .id_table = sky81452_ids,
+};
+
+module_i2c_driver(sky81452_driver);
+
+MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");
+MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
+MODULE_LICENSE("GPL v2");