summaryrefslogtreecommitdiff
path: root/drivers/mfd/bcm590xx.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mfd/bcm590xx.c')
-rw-r--r--drivers/mfd/bcm590xx.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/mfd/bcm590xx.c b/drivers/mfd/bcm590xx.c
new file mode 100644
index 000000000..e334de000
--- /dev/null
+++ b/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");