+++ /dev/null
-From 1b0018dfd6295cbcc87738601b84bf49f3004419 Mon Sep 17 00:00:00 2001
-From: Kenneth Heitke <kheitke@codeaurora.org>
-Date: Wed, 12 Feb 2014 13:44:22 -0600
-Subject: [PATCH 055/182] spmi: Linux driver framework for SPMI
-
-System Power Management Interface (SPMI) is a specification
-developed by the MIPI (Mobile Industry Process Interface) Alliance
-optimized for the real time control of Power Management ICs (PMIC).
-
-SPMI is a two-wire serial interface that supports up to 4 master
-devices and up to 16 logical slaves.
-
-The framework supports message APIs, multiple busses (1 controller
-per bus) and multiple clients/slave devices per controller.
-
-Signed-off-by: Kenneth Heitke <kheitke@codeaurora.org>
-Signed-off-by: Michael Bohan <mbohan@codeaurora.org>
-Signed-off-by: Josh Cartwright <joshc@codeaurora.org>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
----
- drivers/Kconfig | 2 +
- drivers/Makefile | 1 +
- drivers/spmi/Kconfig | 9 +
- drivers/spmi/Makefile | 4 +
- drivers/spmi/spmi.c | 609 +++++++++++++++++++++++++++++++++++++++
- include/dt-bindings/spmi/spmi.h | 18 ++
- include/linux/mod_devicetable.h | 8 +
- include/linux/spmi.h | 191 ++++++++++++
- 8 files changed, 842 insertions(+)
- create mode 100644 drivers/spmi/Kconfig
- create mode 100644 drivers/spmi/Makefile
- create mode 100644 drivers/spmi/spmi.c
- create mode 100644 include/dt-bindings/spmi/spmi.h
- create mode 100644 include/linux/spmi.h
-
---- a/drivers/Kconfig
-+++ b/drivers/Kconfig
-@@ -52,6 +52,8 @@ source "drivers/i2c/Kconfig"
-
- source "drivers/spi/Kconfig"
-
-+source "drivers/spmi/Kconfig"
-+
- source "drivers/hsi/Kconfig"
-
- source "drivers/pps/Kconfig"
---- a/drivers/Makefile
-+++ b/drivers/Makefile
-@@ -66,6 +66,7 @@ obj-$(CONFIG_ATA) += ata/
- obj-$(CONFIG_TARGET_CORE) += target/
- obj-$(CONFIG_MTD) += mtd/
- obj-$(CONFIG_SPI) += spi/
-+obj-$(CONFIG_SPMI) += spmi/
- obj-y += hsi/
- obj-y += net/
- obj-$(CONFIG_ATM) += atm/
---- /dev/null
-+++ b/drivers/spmi/Kconfig
-@@ -0,0 +1,9 @@
-+#
-+# SPMI driver configuration
-+#
-+menuconfig SPMI
-+ tristate "SPMI support"
-+ help
-+ SPMI (System Power Management Interface) is a two-wire
-+ serial interface between baseband and application processors
-+ and Power Management Integrated Circuits (PMIC).
---- /dev/null
-+++ b/drivers/spmi/Makefile
-@@ -0,0 +1,4 @@
-+#
-+# Makefile for kernel SPMI framework.
-+#
-+obj-$(CONFIG_SPMI) += spmi.o
---- /dev/null
-+++ b/drivers/spmi/spmi.c
-@@ -0,0 +1,609 @@
-+/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 and
-+ * only 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.
-+ */
-+#include <linux/kernel.h>
-+#include <linux/errno.h>
-+#include <linux/idr.h>
-+#include <linux/slab.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/of_device.h>
-+#include <linux/platform_device.h>
-+#include <linux/spmi.h>
-+#include <linux/module.h>
-+#include <linux/pm_runtime.h>
-+
-+#include <dt-bindings/spmi/spmi.h>
-+
-+static DEFINE_IDA(ctrl_ida);
-+
-+static void spmi_dev_release(struct device *dev)
-+{
-+ struct spmi_device *sdev = to_spmi_device(dev);
-+ kfree(sdev);
-+}
-+
-+static const struct device_type spmi_dev_type = {
-+ .release = spmi_dev_release,
-+};
-+
-+static void spmi_ctrl_release(struct device *dev)
-+{
-+ struct spmi_controller *ctrl = to_spmi_controller(dev);
-+ ida_simple_remove(&ctrl_ida, ctrl->nr);
-+ kfree(ctrl);
-+}
-+
-+static const struct device_type spmi_ctrl_type = {
-+ .release = spmi_ctrl_release,
-+};
-+
-+#ifdef CONFIG_PM_RUNTIME
-+static int spmi_runtime_suspend(struct device *dev)
-+{
-+ struct spmi_device *sdev = to_spmi_device(dev);
-+ int err;
-+
-+ err = pm_generic_runtime_suspend(dev);
-+ if (err)
-+ return err;
-+
-+ return spmi_command_sleep(sdev);
-+}
-+
-+static int spmi_runtime_resume(struct device *dev)
-+{
-+ struct spmi_device *sdev = to_spmi_device(dev);
-+ int err;
-+
-+ err = spmi_command_wakeup(sdev);
-+ if (err)
-+ return err;
-+
-+ return pm_generic_runtime_resume(dev);
-+}
-+#endif
-+
-+static const struct dev_pm_ops spmi_pm_ops = {
-+ SET_RUNTIME_PM_OPS(
-+ spmi_runtime_suspend,
-+ spmi_runtime_resume,
-+ NULL
-+ )
-+};
-+
-+static int spmi_device_match(struct device *dev, struct device_driver *drv)
-+{
-+ if (of_driver_match_device(dev, drv))
-+ return 1;
-+
-+ if (drv->name)
-+ return strncmp(dev_name(dev), drv->name,
-+ SPMI_NAME_SIZE) == 0;
-+
-+ return 0;
-+}
-+
-+/**
-+ * spmi_device_add() - add a device previously constructed via spmi_device_alloc()
-+ * @sdev: spmi_device to be added
-+ */
-+int spmi_device_add(struct spmi_device *sdev)
-+{
-+ struct spmi_controller *ctrl = sdev->ctrl;
-+ int err;
-+
-+ dev_set_name(&sdev->dev, "%d-%02x", ctrl->nr, sdev->usid);
-+
-+ err = device_add(&sdev->dev);
-+ if (err < 0) {
-+ dev_err(&sdev->dev, "Can't add %s, status %d\n",
-+ dev_name(&sdev->dev), err);
-+ goto err_device_add;
-+ }
-+
-+ dev_dbg(&sdev->dev, "device %s registered\n", dev_name(&sdev->dev));
-+
-+err_device_add:
-+ return err;
-+}
-+EXPORT_SYMBOL_GPL(spmi_device_add);
-+
-+/**
-+ * spmi_device_remove(): remove an SPMI device
-+ * @sdev: spmi_device to be removed
-+ */
-+void spmi_device_remove(struct spmi_device *sdev)
-+{
-+ device_unregister(&sdev->dev);
-+}
-+EXPORT_SYMBOL_GPL(spmi_device_remove);
-+
-+static inline int
-+spmi_cmd(struct spmi_controller *ctrl, u8 opcode, u8 sid)
-+{
-+ if (!ctrl || !ctrl->cmd || ctrl->dev.type != &spmi_ctrl_type)
-+ return -EINVAL;
-+
-+ return ctrl->cmd(ctrl, opcode, sid);
-+}
-+
-+static inline int spmi_read_cmd(struct spmi_controller *ctrl, u8 opcode,
-+ u8 sid, u16 addr, u8 *buf, size_t len)
-+{
-+ if (!ctrl || !ctrl->read_cmd || ctrl->dev.type != &spmi_ctrl_type)
-+ return -EINVAL;
-+
-+ return ctrl->read_cmd(ctrl, opcode, sid, addr, buf, len);
-+}
-+
-+static inline int spmi_write_cmd(struct spmi_controller *ctrl, u8 opcode,
-+ u8 sid, u16 addr, const u8 *buf, size_t len)
-+{
-+ if (!ctrl || !ctrl->write_cmd || ctrl->dev.type != &spmi_ctrl_type)
-+ return -EINVAL;
-+
-+ return ctrl->write_cmd(ctrl, opcode, sid, addr, buf, len);
-+}
-+
-+/**
-+ * spmi_register_read() - register read
-+ * @sdev: SPMI device.
-+ * @addr: slave register address (5-bit address).
-+ * @buf: buffer to be populated with data from the Slave.
-+ *
-+ * Reads 1 byte of data from a Slave device register.
-+ */
-+int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf)
-+{
-+ /* 5-bit register address */
-+ if (addr > 0x1F)
-+ return -EINVAL;
-+
-+ return spmi_read_cmd(sdev->ctrl, SPMI_CMD_READ, sdev->usid, addr,
-+ buf, 1);
-+}
-+EXPORT_SYMBOL_GPL(spmi_register_read);
-+
-+/**
-+ * spmi_ext_register_read() - extended register read
-+ * @sdev: SPMI device.
-+ * @addr: slave register address (8-bit address).
-+ * @buf: buffer to be populated with data from the Slave.
-+ * @len: the request number of bytes to read (up to 16 bytes).
-+ *
-+ * Reads up to 16 bytes of data from the extended register space on a
-+ * Slave device.
-+ */
-+int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf,
-+ size_t len)
-+{
-+ /* 8-bit register address, up to 16 bytes */
-+ if (len == 0 || len > 16)
-+ return -EINVAL;
-+
-+ return spmi_read_cmd(sdev->ctrl, SPMI_CMD_EXT_READ, sdev->usid, addr,
-+ buf, len);
-+}
-+EXPORT_SYMBOL_GPL(spmi_ext_register_read);
-+
-+/**
-+ * spmi_ext_register_readl() - extended register read long
-+ * @sdev: SPMI device.
-+ * @addr: slave register address (16-bit address).
-+ * @buf: buffer to be populated with data from the Slave.
-+ * @len: the request number of bytes to read (up to 8 bytes).
-+ *
-+ * Reads up to 8 bytes of data from the extended register space on a
-+ * Slave device using 16-bit address.
-+ */
-+int spmi_ext_register_readl(struct spmi_device *sdev, u16 addr, u8 *buf,
-+ size_t len)
-+{
-+ /* 16-bit register address, up to 8 bytes */
-+ if (len == 0 || len > 8)
-+ return -EINVAL;
-+
-+ return spmi_read_cmd(sdev->ctrl, SPMI_CMD_EXT_READL, sdev->usid, addr,
-+ buf, len);
-+}
-+EXPORT_SYMBOL_GPL(spmi_ext_register_readl);
-+
-+/**
-+ * spmi_register_write() - register write
-+ * @sdev: SPMI device
-+ * @addr: slave register address (5-bit address).
-+ * @data: buffer containing the data to be transferred to the Slave.
-+ *
-+ * Writes 1 byte of data to a Slave device register.
-+ */
-+int spmi_register_write(struct spmi_device *sdev, u8 addr, u8 data)
-+{
-+ /* 5-bit register address */
-+ if (addr > 0x1F)
-+ return -EINVAL;
-+
-+ return spmi_write_cmd(sdev->ctrl, SPMI_CMD_WRITE, sdev->usid, addr,
-+ &data, 1);
-+}
-+EXPORT_SYMBOL_GPL(spmi_register_write);
-+
-+/**
-+ * spmi_register_zero_write() - register zero write
-+ * @sdev: SPMI device.
-+ * @data: the data to be written to register 0 (7-bits).
-+ *
-+ * Writes data to register 0 of the Slave device.
-+ */
-+int spmi_register_zero_write(struct spmi_device *sdev, u8 data)
-+{
-+ return spmi_write_cmd(sdev->ctrl, SPMI_CMD_ZERO_WRITE, sdev->usid, 0,
-+ &data, 1);
-+}
-+EXPORT_SYMBOL_GPL(spmi_register_zero_write);
-+
-+/**
-+ * spmi_ext_register_write() - extended register write
-+ * @sdev: SPMI device.
-+ * @addr: slave register address (8-bit address).
-+ * @buf: buffer containing the data to be transferred to the Slave.
-+ * @len: the request number of bytes to read (up to 16 bytes).
-+ *
-+ * Writes up to 16 bytes of data to the extended register space of a
-+ * Slave device.
-+ */
-+int spmi_ext_register_write(struct spmi_device *sdev, u8 addr, const u8 *buf,
-+ size_t len)
-+{
-+ /* 8-bit register address, up to 16 bytes */
-+ if (len == 0 || len > 16)
-+ return -EINVAL;
-+
-+ return spmi_write_cmd(sdev->ctrl, SPMI_CMD_EXT_WRITE, sdev->usid, addr,
-+ buf, len);
-+}
-+EXPORT_SYMBOL_GPL(spmi_ext_register_write);
-+
-+/**
-+ * spmi_ext_register_writel() - extended register write long
-+ * @sdev: SPMI device.
-+ * @addr: slave register address (16-bit address).
-+ * @buf: buffer containing the data to be transferred to the Slave.
-+ * @len: the request number of bytes to read (up to 8 bytes).
-+ *
-+ * Writes up to 8 bytes of data to the extended register space of a
-+ * Slave device using 16-bit address.
-+ */
-+int spmi_ext_register_writel(struct spmi_device *sdev, u16 addr, const u8 *buf,
-+ size_t len)
-+{
-+ /* 4-bit Slave Identifier, 16-bit register address, up to 8 bytes */
-+ if (len == 0 || len > 8)
-+ return -EINVAL;
-+
-+ return spmi_write_cmd(sdev->ctrl, SPMI_CMD_EXT_WRITEL, sdev->usid,
-+ addr, buf, len);
-+}
-+EXPORT_SYMBOL_GPL(spmi_ext_register_writel);
-+
-+/**
-+ * spmi_command_reset() - sends RESET command to the specified slave
-+ * @sdev: SPMI device.
-+ *
-+ * The Reset command initializes the Slave and forces all registers to
-+ * their reset values. The Slave shall enter the STARTUP state after
-+ * receiving a Reset command.
-+ */
-+int spmi_command_reset(struct spmi_device *sdev)
-+{
-+ return spmi_cmd(sdev->ctrl, SPMI_CMD_RESET, sdev->usid);
-+}
-+EXPORT_SYMBOL_GPL(spmi_command_reset);
-+
-+/**
-+ * spmi_command_sleep() - sends SLEEP command to the specified SPMI device
-+ * @sdev: SPMI device.
-+ *
-+ * The Sleep command causes the Slave to enter the user defined SLEEP state.
-+ */
-+int spmi_command_sleep(struct spmi_device *sdev)
-+{
-+ return spmi_cmd(sdev->ctrl, SPMI_CMD_SLEEP, sdev->usid);
-+}
-+EXPORT_SYMBOL_GPL(spmi_command_sleep);
-+
-+/**
-+ * spmi_command_wakeup() - sends WAKEUP command to the specified SPMI device
-+ * @sdev: SPMI device.
-+ *
-+ * The Wakeup command causes the Slave to move from the SLEEP state to
-+ * the ACTIVE state.
-+ */
-+int spmi_command_wakeup(struct spmi_device *sdev)
-+{
-+ return spmi_cmd(sdev->ctrl, SPMI_CMD_WAKEUP, sdev->usid);
-+}
-+EXPORT_SYMBOL_GPL(spmi_command_wakeup);
-+
-+/**
-+ * spmi_command_shutdown() - sends SHUTDOWN command to the specified SPMI device
-+ * @sdev: SPMI device.
-+ *
-+ * The Shutdown command causes the Slave to enter the SHUTDOWN state.
-+ */
-+int spmi_command_shutdown(struct spmi_device *sdev)
-+{
-+ return spmi_cmd(sdev->ctrl, SPMI_CMD_SHUTDOWN, sdev->usid);
-+}
-+EXPORT_SYMBOL_GPL(spmi_command_shutdown);
-+
-+static int spmi_drv_probe(struct device *dev)
-+{
-+ const struct spmi_driver *sdrv = to_spmi_driver(dev->driver);
-+ struct spmi_device *sdev = to_spmi_device(dev);
-+ int err;
-+
-+ /* Ensure the slave is in ACTIVE state */
-+ err = spmi_command_wakeup(sdev);
-+ if (err)
-+ goto fail_wakeup;
-+
-+ pm_runtime_get_noresume(dev);
-+ pm_runtime_set_active(dev);
-+ pm_runtime_enable(dev);
-+
-+ err = sdrv->probe(sdev);
-+ if (err)
-+ goto fail_probe;
-+
-+ return 0;
-+
-+fail_probe:
-+ pm_runtime_disable(dev);
-+ pm_runtime_set_suspended(dev);
-+ pm_runtime_put_noidle(dev);
-+fail_wakeup:
-+ return err;
-+}
-+
-+static int spmi_drv_remove(struct device *dev)
-+{
-+ const struct spmi_driver *sdrv = to_spmi_driver(dev->driver);
-+
-+ pm_runtime_get_sync(dev);
-+ sdrv->remove(to_spmi_device(dev));
-+ pm_runtime_put_noidle(dev);
-+
-+ pm_runtime_disable(dev);
-+ pm_runtime_set_suspended(dev);
-+ pm_runtime_put_noidle(dev);
-+ return 0;
-+}
-+
-+static struct bus_type spmi_bus_type = {
-+ .name = "spmi",
-+ .match = spmi_device_match,
-+ .pm = &spmi_pm_ops,
-+ .probe = spmi_drv_probe,
-+ .remove = spmi_drv_remove,
-+};
-+
-+/**
-+ * spmi_controller_alloc() - Allocate a new SPMI device
-+ * @ctrl: associated controller
-+ *
-+ * Caller is responsible for either calling spmi_device_add() to add the
-+ * newly allocated controller, or calling spmi_device_put() to discard it.
-+ */
-+struct spmi_device *spmi_device_alloc(struct spmi_controller *ctrl)
-+{
-+ struct spmi_device *sdev;
-+
-+ sdev = kzalloc(sizeof(*sdev), GFP_KERNEL);
-+ if (!sdev)
-+ return NULL;
-+
-+ sdev->ctrl = ctrl;
-+ device_initialize(&sdev->dev);
-+ sdev->dev.parent = &ctrl->dev;
-+ sdev->dev.bus = &spmi_bus_type;
-+ sdev->dev.type = &spmi_dev_type;
-+ return sdev;
-+}
-+EXPORT_SYMBOL_GPL(spmi_device_alloc);
-+
-+/**
-+ * spmi_controller_alloc() - Allocate a new SPMI controller
-+ * @parent: parent device
-+ * @size: size of private data
-+ *
-+ * Caller is responsible for either calling spmi_controller_add() to add the
-+ * newly allocated controller, or calling spmi_controller_put() to discard it.
-+ * The allocated private data region may be accessed via
-+ * spmi_controller_get_drvdata()
-+ */
-+struct spmi_controller *spmi_controller_alloc(struct device *parent,
-+ size_t size)
-+{
-+ struct spmi_controller *ctrl;
-+ int id;
-+
-+ if (WARN_ON(!parent))
-+ return NULL;
-+
-+ ctrl = kzalloc(sizeof(*ctrl) + size, GFP_KERNEL);
-+ if (!ctrl)
-+ return NULL;
-+
-+ device_initialize(&ctrl->dev);
-+ ctrl->dev.type = &spmi_ctrl_type;
-+ ctrl->dev.bus = &spmi_bus_type;
-+ ctrl->dev.parent = parent;
-+ ctrl->dev.of_node = parent->of_node;
-+ spmi_controller_set_drvdata(ctrl, &ctrl[1]);
-+
-+ id = ida_simple_get(&ctrl_ida, 0, 0, GFP_KERNEL);
-+ if (id < 0) {
-+ dev_err(parent,
-+ "unable to allocate SPMI controller identifier.\n");
-+ spmi_controller_put(ctrl);
-+ return NULL;
-+ }
-+
-+ ctrl->nr = id;
-+ dev_set_name(&ctrl->dev, "spmi-%d", id);
-+
-+ dev_dbg(&ctrl->dev, "allocated controller 0x%p id %d\n", ctrl, id);
-+ return ctrl;
-+}
-+EXPORT_SYMBOL_GPL(spmi_controller_alloc);
-+
-+static void of_spmi_register_devices(struct spmi_controller *ctrl)
-+{
-+ struct device_node *node;
-+ int err;
-+
-+ if (!ctrl->dev.of_node)
-+ return;
-+
-+ for_each_available_child_of_node(ctrl->dev.of_node, node) {
-+ struct spmi_device *sdev;
-+ u32 reg[2];
-+
-+ dev_dbg(&ctrl->dev, "adding child %s\n", node->full_name);
-+
-+ err = of_property_read_u32_array(node, "reg", reg, 2);
-+ if (err) {
-+ dev_err(&ctrl->dev,
-+ "node %s err (%d) does not have 'reg' property\n",
-+ node->full_name, err);
-+ continue;
-+ }
-+
-+ if (reg[1] != SPMI_USID) {
-+ dev_err(&ctrl->dev,
-+ "node %s contains unsupported 'reg' entry\n",
-+ node->full_name);
-+ continue;
-+ }
-+
-+ if (reg[0] >= SPMI_MAX_SLAVE_ID) {
-+ dev_err(&ctrl->dev,
-+ "invalid usid on node %s\n",
-+ node->full_name);
-+ continue;
-+ }
-+
-+ dev_dbg(&ctrl->dev, "read usid %02x\n", reg[0]);
-+
-+ sdev = spmi_device_alloc(ctrl);
-+ if (!sdev)
-+ continue;
-+
-+ sdev->dev.of_node = node;
-+ sdev->usid = (u8) reg[0];
-+
-+ err = spmi_device_add(sdev);
-+ if (err) {
-+ dev_err(&sdev->dev,
-+ "failure adding device. status %d\n", err);
-+ spmi_device_put(sdev);
-+ }
-+ }
-+}
-+
-+/**
-+ * spmi_controller_add() - Add an SPMI controller
-+ * @ctrl: controller to be registered.
-+ *
-+ * Register a controller previously allocated via spmi_controller_alloc() with
-+ * the SPMI core.
-+ */
-+int spmi_controller_add(struct spmi_controller *ctrl)
-+{
-+ int ret;
-+
-+ /* Can't register until after driver model init */
-+ if (WARN_ON(!spmi_bus_type.p))
-+ return -EAGAIN;
-+
-+ ret = device_add(&ctrl->dev);
-+ if (ret)
-+ return ret;
-+
-+ if (IS_ENABLED(CONFIG_OF))
-+ of_spmi_register_devices(ctrl);
-+
-+ dev_dbg(&ctrl->dev, "spmi-%d registered: dev:%p\n",
-+ ctrl->nr, &ctrl->dev);
-+
-+ return 0;
-+};
-+EXPORT_SYMBOL_GPL(spmi_controller_add);
-+
-+/* Remove a device associated with a controller */
-+static int spmi_ctrl_remove_device(struct device *dev, void *data)
-+{
-+ struct spmi_device *spmidev = to_spmi_device(dev);
-+ if (dev->type == &spmi_dev_type)
-+ spmi_device_remove(spmidev);
-+ return 0;
-+}
-+
-+/**
-+ * spmi_controller_remove(): remove an SPMI controller
-+ * @ctrl: controller to remove
-+ *
-+ * Remove a SPMI controller. Caller is responsible for calling
-+ * spmi_controller_put() to discard the allocated controller.
-+ */
-+void spmi_controller_remove(struct spmi_controller *ctrl)
-+{
-+ int dummy;
-+
-+ if (!ctrl)
-+ return;
-+
-+ dummy = device_for_each_child(&ctrl->dev, NULL,
-+ spmi_ctrl_remove_device);
-+ device_del(&ctrl->dev);
-+}
-+EXPORT_SYMBOL_GPL(spmi_controller_remove);
-+
-+/**
-+ * spmi_driver_register() - Register client driver with SPMI core
-+ * @sdrv: client driver to be associated with client-device.
-+ *
-+ * This API will register the client driver with the SPMI framework.
-+ * It is typically called from the driver's module-init function.
-+ */
-+int spmi_driver_register(struct spmi_driver *sdrv)
-+{
-+ sdrv->driver.bus = &spmi_bus_type;
-+ return driver_register(&sdrv->driver);
-+}
-+EXPORT_SYMBOL_GPL(spmi_driver_register);
-+
-+static void __exit spmi_exit(void)
-+{
-+ bus_unregister(&spmi_bus_type);
-+}
-+module_exit(spmi_exit);
-+
-+static int __init spmi_init(void)
-+{
-+ return bus_register(&spmi_bus_type);
-+}
-+postcore_initcall(spmi_init);
-+
-+MODULE_LICENSE("GPL v2");
-+MODULE_DESCRIPTION("SPMI module");
-+MODULE_ALIAS("platform:spmi");
---- /dev/null
-+++ b/include/dt-bindings/spmi/spmi.h
-@@ -0,0 +1,18 @@
-+/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 and
-+ * only 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.
-+ */
-+#ifndef __DT_BINDINGS_SPMI_H
-+#define __DT_BINDINGS_SPMI_H
-+
-+#define SPMI_USID 0
-+#define SPMI_GSID 1
-+
-+#endif
---- a/include/linux/mod_devicetable.h
-+++ b/include/linux/mod_devicetable.h
-@@ -432,6 +432,14 @@ struct spi_device_id {
- kernel_ulong_t driver_data; /* Data private to the driver */
- };
-
-+#define SPMI_NAME_SIZE 32
-+#define SPMI_MODULE_PREFIX "spmi:"
-+
-+struct spmi_device_id {
-+ char name[SPMI_NAME_SIZE];
-+ kernel_ulong_t driver_data; /* Data private to the driver */
-+};
-+
- /* dmi */
- enum dmi_field {
- DMI_NONE,
---- /dev/null
-+++ b/include/linux/spmi.h
-@@ -0,0 +1,191 @@
-+/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 and
-+ * only 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.
-+ */
-+#ifndef _LINUX_SPMI_H
-+#define _LINUX_SPMI_H
-+
-+#include <linux/types.h>
-+#include <linux/device.h>
-+#include <linux/mod_devicetable.h>
-+
-+/* Maximum slave identifier */
-+#define SPMI_MAX_SLAVE_ID 16
-+
-+/* SPMI Commands */
-+#define SPMI_CMD_EXT_WRITE 0x00
-+#define SPMI_CMD_RESET 0x10
-+#define SPMI_CMD_SLEEP 0x11
-+#define SPMI_CMD_SHUTDOWN 0x12
-+#define SPMI_CMD_WAKEUP 0x13
-+#define SPMI_CMD_AUTHENTICATE 0x14
-+#define SPMI_CMD_MSTR_READ 0x15
-+#define SPMI_CMD_MSTR_WRITE 0x16
-+#define SPMI_CMD_TRANSFER_BUS_OWNERSHIP 0x1A
-+#define SPMI_CMD_DDB_MASTER_READ 0x1B
-+#define SPMI_CMD_DDB_SLAVE_READ 0x1C
-+#define SPMI_CMD_EXT_READ 0x20
-+#define SPMI_CMD_EXT_WRITEL 0x30
-+#define SPMI_CMD_EXT_READL 0x38
-+#define SPMI_CMD_WRITE 0x40
-+#define SPMI_CMD_READ 0x60
-+#define SPMI_CMD_ZERO_WRITE 0x80
-+
-+/**
-+ * struct spmi_device - Basic representation of an SPMI device
-+ * @dev: Driver model representation of the device.
-+ * @ctrl: SPMI controller managing the bus hosting this device.
-+ * @usid: This devices' Unique Slave IDentifier.
-+ */
-+struct spmi_device {
-+ struct device dev;
-+ struct spmi_controller *ctrl;
-+ u8 usid;
-+};
-+
-+static inline struct spmi_device *to_spmi_device(struct device *d)
-+{
-+ return container_of(d, struct spmi_device, dev);
-+}
-+
-+static inline void *spmi_device_get_drvdata(const struct spmi_device *sdev)
-+{
-+ return dev_get_drvdata(&sdev->dev);
-+}
-+
-+static inline void spmi_device_set_drvdata(struct spmi_device *sdev, void *data)
-+{
-+ dev_set_drvdata(&sdev->dev, data);
-+}
-+
-+struct spmi_device *spmi_device_alloc(struct spmi_controller *ctrl);
-+
-+static inline void spmi_device_put(struct spmi_device *sdev)
-+{
-+ if (sdev)
-+ put_device(&sdev->dev);
-+}
-+
-+int spmi_device_add(struct spmi_device *sdev);
-+
-+void spmi_device_remove(struct spmi_device *sdev);
-+
-+/**
-+ * struct spmi_controller - interface to the SPMI master controller
-+ * @dev: Driver model representation of the device.
-+ * @nr: board-specific number identifier for this controller/bus
-+ * @cmd: sends a non-data command sequence on the SPMI bus.
-+ * @read_cmd: sends a register read command sequence on the SPMI bus.
-+ * @write_cmd: sends a register write command sequence on the SPMI bus.
-+ */
-+struct spmi_controller {
-+ struct device dev;
-+ unsigned int nr;
-+ int (*cmd)(struct spmi_controller *ctrl, u8 opcode, u8 sid);
-+ int (*read_cmd)(struct spmi_controller *ctrl, u8 opcode,
-+ u8 sid, u16 addr, u8 *buf, size_t len);
-+ int (*write_cmd)(struct spmi_controller *ctrl, u8 opcode,
-+ u8 sid, u16 addr, const u8 *buf, size_t len);
-+};
-+
-+static inline struct spmi_controller *to_spmi_controller(struct device *d)
-+{
-+ return container_of(d, struct spmi_controller, dev);
-+}
-+
-+static inline
-+void *spmi_controller_get_drvdata(const struct spmi_controller *ctrl)
-+{
-+ return dev_get_drvdata(&ctrl->dev);
-+}
-+
-+static inline void spmi_controller_set_drvdata(struct spmi_controller *ctrl,
-+ void *data)
-+{
-+ dev_set_drvdata(&ctrl->dev, data);
-+}
-+
-+struct spmi_controller *spmi_controller_alloc(struct device *parent,
-+ size_t size);
-+
-+/**
-+ * spmi_controller_put() - decrement controller refcount
-+ * @ctrl SPMI controller.
-+ */
-+static inline void spmi_controller_put(struct spmi_controller *ctrl)
-+{
-+ if (ctrl)
-+ put_device(&ctrl->dev);
-+}
-+
-+int spmi_controller_add(struct spmi_controller *ctrl);
-+void spmi_controller_remove(struct spmi_controller *ctrl);
-+
-+/**
-+ * struct spmi_driver - SPMI slave device driver
-+ * @driver: SPMI device drivers should initialize name and owner field of
-+ * this structure.
-+ * @probe: binds this driver to a SPMI device.
-+ * @remove: unbinds this driver from the SPMI device.
-+ * @shutdown: standard shutdown callback used during powerdown/halt.
-+ * @suspend: standard suspend callback used during system suspend.
-+ * @resume: standard resume callback used during system resume.
-+ *
-+ * If PM runtime support is desired for a slave, a device driver can call
-+ * pm_runtime_put() from their probe() routine (and a balancing
-+ * pm_runtime_get() in remove()). PM runtime support for a slave is
-+ * implemented by issuing a SLEEP command to the slave on runtime_suspend(),
-+ * transitioning the slave into the SLEEP state. On runtime_resume(), a WAKEUP
-+ * command is sent to the slave to bring it back to ACTIVE.
-+ */
-+struct spmi_driver {
-+ struct device_driver driver;
-+ int (*probe)(struct spmi_device *sdev);
-+ void (*remove)(struct spmi_device *sdev);
-+};
-+
-+static inline struct spmi_driver *to_spmi_driver(struct device_driver *d)
-+{
-+ return container_of(d, struct spmi_driver, driver);
-+}
-+
-+int spmi_driver_register(struct spmi_driver *sdrv);
-+
-+/**
-+ * spmi_driver_unregister() - unregister an SPMI client driver
-+ * @sdrv: the driver to unregister
-+ */
-+static inline void spmi_driver_unregister(struct spmi_driver *sdrv)
-+{
-+ if (sdrv)
-+ driver_unregister(&sdrv->driver);
-+}
-+
-+#define module_spmi_driver(__spmi_driver) \
-+ module_driver(__spmi_driver, spmi_driver_register, \
-+ spmi_driver_unregister)
-+
-+int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf);
-+int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf,
-+ size_t len);
-+int spmi_ext_register_readl(struct spmi_device *sdev, u16 addr, u8 *buf,
-+ size_t len);
-+int spmi_register_write(struct spmi_device *sdev, u8 addr, u8 data);
-+int spmi_register_zero_write(struct spmi_device *sdev, u8 data);
-+int spmi_ext_register_write(struct spmi_device *sdev, u8 addr,
-+ const u8 *buf, size_t len);
-+int spmi_ext_register_writel(struct spmi_device *sdev, u16 addr,
-+ const u8 *buf, size_t len);
-+int spmi_command_reset(struct spmi_device *sdev);
-+int spmi_command_sleep(struct spmi_device *sdev);
-+int spmi_command_wakeup(struct spmi_device *sdev);
-+int spmi_command_shutdown(struct spmi_device *sdev);
-+
-+#endif
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