1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/mfd/bcm590xx.c b/drivers/mfd/bcm590xx.c
new file mode 100644
index 000000000..6ca337cde
--- /dev/null
+++ b/drivers/mfd/bcm590xx.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Broadcom BCM590xx PMU
+ *
+ * Copyright 2014 Linaro Limited
+ * Author: Matt Porter <mporter@linaro.org>
+ */
+
+#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_device(i2c_pri->adapter,
+					  i2c_pri->addr | BIT(2));
+	if (IS_ERR(bcm590xx->i2c_sec)) {
+		dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n");
+		return PTR_ERR(bcm590xx->i2c_sec);
+	}
+	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 = devm_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 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",
+		   .of_match_table = bcm590xx_of_match,
+	},
+	.probe = bcm590xx_i2c_probe,
+	.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");