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Message-Id: <1391516352-32359-4-git-send-email-mporter@linaro.org>
Date: Tue, 4 Feb 2014 07:19:09 -0500
From: Matt Porter <mporter@...aro.org>
To: Wolfram Sang <wsa@...-dreams.de>,
Tim Kryger <tim.kryger@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Samuel Ortiz <sameo@...ux.intel.com>,
Lee Jones <lee.jones@...aro.org>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nsource.wolfsonmicro.com>,
Christian Daudt <bcm@...thebug.org>
Cc: Devicetree List <devicetree@...r.kernel.org>,
Linux I2C List <linux-i2c@...r.kernel.org>,
Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/6] mfd: add bcm59056 pmu driver
Add a driver for the BCM59056 PMU multi-function device. The driver
initially supports regmap initialization and instantiation of the
voltage regulator device function of the PMU.
Signed-off-by: Matt Porter <mporter@...aro.org>
Reviewed-by: Tim Kryger <tim.kryger@...aro.org>
Reviewed-by: Markus Mayer <markus.mayer@...aro.org>
---
drivers/mfd/Kconfig | 8 +++
drivers/mfd/Makefile | 1 +
drivers/mfd/bcm59056.c | 119 +++++++++++++++++++++++++++++++++++++++++++
include/linux/mfd/bcm59056.h | 35 +++++++++++++
4 files changed, 163 insertions(+)
create mode 100644 drivers/mfd/bcm59056.c
create mode 100644 include/linux/mfd/bcm59056.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 49bb445..36e96c2 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -59,6 +59,14 @@ config MFD_AAT2870_CORE
additional drivers must be enabled in order to use the
functionality of the device.
+config MFD_BCM59056
+ bool "Broadcom BCM59056 PMU"
+ select MFD_CORE
+ select REGMAP_I2C
+ depends on I2C=y
+ help
+ Support for the BCM59056 PMU from Broadcom
+
config MFD_CROS_EC
tristate "ChromeOS Embedded Controller"
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 5aea5ef..8d7e110 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_MFD_88PM800) += 88pm800.o 88pm80x.o
obj-$(CONFIG_MFD_88PM805) += 88pm805.o 88pm80x.o
obj-$(CONFIG_MFD_SM501) += sm501.o
obj-$(CONFIG_MFD_ASIC3) += asic3.o tmio_core.o
+obj-$(CONFIG_MFD_BCM59056) += bcm59056.o
obj-$(CONFIG_MFD_CROS_EC) += cros_ec.o
obj-$(CONFIG_MFD_CROS_EC_I2C) += cros_ec_i2c.o
obj-$(CONFIG_MFD_CROS_EC_SPI) += cros_ec_spi.o
diff --git a/drivers/mfd/bcm59056.c b/drivers/mfd/bcm59056.c
new file mode 100644
index 0000000..f193bfb
--- /dev/null
+++ b/drivers/mfd/bcm59056.c
@@ -0,0 +1,119 @@
+/*
+ * Broadcom BCM59056 PMU
+ *
+ * Copyright 2014 Linaro Limited
+ * Author: Matt Porter <mporter@...aro.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/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/mfd/bcm59056.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 struct mfd_cell bcm59056s[] = {
+ {
+ .name = "bcm59056-pmu",
+ },
+};
+
+static const struct regmap_config bcm59056_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = BCM59056_MAX_REGISTER - 1,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int bcm59056_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct bcm59056 *bcm59056;
+ int chip_id = id->driver_data;
+ int ret = 0;
+
+ bcm59056 = devm_kzalloc(&i2c->dev, sizeof(*bcm59056), GFP_KERNEL);
+ if (!bcm59056)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, bcm59056);
+ bcm59056->dev = &i2c->dev;
+ bcm59056->i2c_client = i2c;
+ bcm59056->id = chip_id;
+
+ bcm59056->regmap = devm_regmap_init_i2c(i2c, &bcm59056_regmap_config);
+ if (IS_ERR(bcm59056->regmap)) {
+ ret = PTR_ERR(bcm59056->regmap);
+ dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = mfd_add_devices(bcm59056->dev, -1,
+ bcm59056s, ARRAY_SIZE(bcm59056s),
+ NULL, 0, NULL);
+ if (ret < 0)
+ dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
+
+ return ret;
+}
+
+static int bcm59056_i2c_remove(struct i2c_client *i2c)
+{
+ struct bcm59056 *bcm59056 = i2c_get_clientdata(i2c);
+
+ mfd_remove_devices(bcm59056->dev);
+
+ return 0;
+}
+
+static const struct of_device_id bcm59056_of_match[] = {
+ { .compatible = "brcm,bcm59056", .data = (void *)BCM59056 },
+ { }
+};
+
+static const struct i2c_device_id bcm59056_i2c_id[] = {
+ { "bcm59056", BCM59056 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, bcm59056_i2c_id);
+
+static struct i2c_driver bcm59056_i2c_driver = {
+ .driver = {
+ .name = "bcm59056",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(bcm59056_of_match),
+ },
+ .probe = bcm59056_i2c_probe,
+ .remove = bcm59056_i2c_remove,
+ .id_table = bcm59056_i2c_id,
+};
+
+static int __init bcm59056_init(void)
+{
+ return i2c_add_driver(&bcm59056_i2c_driver);
+}
+subsys_initcall(bcm59056_init);
+
+static void __exit bcm59056_exit(void)
+{
+ i2c_del_driver(&bcm59056_i2c_driver);
+}
+module_exit(bcm59056_exit);
+
+MODULE_AUTHOR("Matt Porter <mporter@...aro.org>");
+MODULE_DESCRIPTION("BCM59056 multi-function driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:bcm59056");
diff --git a/include/linux/mfd/bcm59056.h b/include/linux/mfd/bcm59056.h
new file mode 100644
index 0000000..967395d
--- /dev/null
+++ b/include/linux/mfd/bcm59056.h
@@ -0,0 +1,35 @@
+/*
+ * Broadcom BCM59056 PMU
+ *
+ * Copyright 2014 Linaro Limited
+ * Author: Matt Porter <mporter@...aro.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.
+ *
+ */
+
+#ifndef __LINUX_MFD_BCM59056_H
+#define __LINUX_MFD_BCM59056_H
+
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+
+/* chip id */
+#define BCM59056 0
+
+/* max register address */
+#define BCM59056_MAX_REGISTER 0xe8
+
+/* bcm59056 chip access */
+struct bcm59056 {
+ struct device *dev;
+ struct i2c_client *i2c_client;
+ struct regmap *regmap;
+ unsigned int id;
+};
+
+#endif /* __LINUX_MFD_BCM59056_H */
--
1.8.4
--
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