Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mfd / bcm590xx.c

diff --git a/kernel/drivers/mfd/bcm590xx.c b/kernel/drivers/mfd/bcm590xx.c
new file mode 100644 (file)
index 0000000..e334de0
--- /dev/null
+++ b/kernel/drivers/mfd/bcm590xx.c
@@ -0,0 +1,132 @@
+/*
+ * Broadcom BCM590xx PMU
+ *
+ * Copyright 2014 Linaro Limited
+ * Author: Matt Porter <mporter@linaro.org>
+ *
+ * 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/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/mfd/bcm590xx.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+static const struct mfd_cell bcm590xx_devs[] = {
+       {
+               .name = "bcm590xx-vregs",
+       },
+};
+
+static const struct regmap_config bcm590xx_regmap_config_pri = {
+       .reg_bits       = 8,
+       .val_bits       = 8,
+       .max_register   = BCM590XX_MAX_REGISTER_PRI,
+       .cache_type     = REGCACHE_RBTREE,
+};
+
+static const struct regmap_config bcm590xx_regmap_config_sec = {
+       .reg_bits       = 8,
+       .val_bits       = 8,
+       .max_register   = BCM590XX_MAX_REGISTER_SEC,
+       .cache_type     = REGCACHE_RBTREE,
+};
+
+static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri,
+                             const struct i2c_device_id *id)
+{
+       struct bcm590xx *bcm590xx;
+       int ret;
+
+       bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL);
+       if (!bcm590xx)
+               return -ENOMEM;
+
+       i2c_set_clientdata(i2c_pri, bcm590xx);
+       bcm590xx->dev = &i2c_pri->dev;
+       bcm590xx->i2c_pri = i2c_pri;
+
+       bcm590xx->regmap_pri = devm_regmap_init_i2c(i2c_pri,
+                                                &bcm590xx_regmap_config_pri);
+       if (IS_ERR(bcm590xx->regmap_pri)) {
+               ret = PTR_ERR(bcm590xx->regmap_pri);
+               dev_err(&i2c_pri->dev, "primary regmap init failed: %d\n", ret);
+               return ret;
+       }
+
+       /* Secondary I2C slave address is the base address with A(2) asserted */
+       bcm590xx->i2c_sec = i2c_new_dummy(i2c_pri->adapter,
+                                         i2c_pri->addr | BIT(2));
+       if (IS_ERR_OR_NULL(bcm590xx->i2c_sec)) {
+               dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n");
+               return -ENODEV;
+       }
+       i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx);
+
+       bcm590xx->regmap_sec = devm_regmap_init_i2c(bcm590xx->i2c_sec,
+                                               &bcm590xx_regmap_config_sec);
+       if (IS_ERR(bcm590xx->regmap_sec)) {
+               ret = PTR_ERR(bcm590xx->regmap_sec);
+               dev_err(&bcm590xx->i2c_sec->dev,
+                       "secondary regmap init failed: %d\n", ret);
+               goto err;
+       }
+
+       ret = mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs,
+                             ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL);
+       if (ret < 0) {
+               dev_err(&i2c_pri->dev, "failed to add sub-devices: %d\n", ret);
+               goto err;
+       }
+
+       return 0;
+
+err:
+       i2c_unregister_device(bcm590xx->i2c_sec);
+       return ret;
+}
+
+static int bcm590xx_i2c_remove(struct i2c_client *i2c)
+{
+       mfd_remove_devices(&i2c->dev);
+       return 0;
+}
+
+static const struct of_device_id bcm590xx_of_match[] = {
+       { .compatible = "brcm,bcm59056" },
+       { }
+};
+MODULE_DEVICE_TABLE(of, bcm590xx_of_match);
+
+static const struct i2c_device_id bcm590xx_i2c_id[] = {
+       { "bcm59056" },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id);
+
+static struct i2c_driver bcm590xx_i2c_driver = {
+       .driver = {
+                  .name = "bcm590xx",
+                  .owner = THIS_MODULE,
+                  .of_match_table = of_match_ptr(bcm590xx_of_match),
+       },
+       .probe = bcm590xx_i2c_probe,
+       .remove = bcm590xx_i2c_remove,
+       .id_table = bcm590xx_i2c_id,
+};
+module_i2c_driver(bcm590xx_i2c_driver);
+
+MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
+MODULE_DESCRIPTION("BCM590xx multi-function driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("i2c:bcm590xx");