forked from Minki/linux
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>
This commit is contained in:
Kenneth Heitke
Greg Kroah-Hartman
parent
a2a720e15f
commit
5a86bf3439
@ -52,6 +52,8 @@ source "drivers/i2c/Kconfig"
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source "drivers/spi/Kconfig"
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source "drivers/spmi/Kconfig"
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source "drivers/hsi/Kconfig"
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source "drivers/pps/Kconfig"
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@ -66,6 +66,7 @@ obj-$(CONFIG_ATA) += ata/
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obj-$(CONFIG_TARGET_CORE) += target/
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obj-$(CONFIG_MTD) += mtd/
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obj-$(CONFIG_SPI) += spi/
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obj-$(CONFIG_SPMI) += spmi/
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obj-y += hsi/
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obj-y += net/
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obj-$(CONFIG_ATM) += atm/
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9
drivers/spmi/Kconfig
Normal file
9
drivers/spmi/Kconfig
Normal file
@ -0,0 +1,9 @@
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#
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# SPMI driver configuration
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#
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menuconfig SPMI
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tristate "SPMI support"
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help
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SPMI (System Power Management Interface) is a two-wire
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serial interface between baseband and application processors
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and Power Management Integrated Circuits (PMIC).
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4
drivers/spmi/Makefile
Normal file
4
drivers/spmi/Makefile
Normal file
@ -0,0 +1,4 @@
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#
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# Makefile for kernel SPMI framework.
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#
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obj-$(CONFIG_SPMI) += spmi.o
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609
drivers/spmi/spmi.c
Normal file
609
drivers/spmi/spmi.c
Normal file
@ -0,0 +1,609 @@
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/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/idr.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/spmi.h>
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#include <linux/module.h>
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#include <linux/pm_runtime.h>
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#include <dt-bindings/spmi/spmi.h>
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static DEFINE_IDA(ctrl_ida);
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static void spmi_dev_release(struct device *dev)
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{
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struct spmi_device *sdev = to_spmi_device(dev);
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kfree(sdev);
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}
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static const struct device_type spmi_dev_type = {
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.release = spmi_dev_release,
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};
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static void spmi_ctrl_release(struct device *dev)
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{
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struct spmi_controller *ctrl = to_spmi_controller(dev);
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ida_simple_remove(&ctrl_ida, ctrl->nr);
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kfree(ctrl);
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}
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static const struct device_type spmi_ctrl_type = {
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.release = spmi_ctrl_release,
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};
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#ifdef CONFIG_PM_RUNTIME
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static int spmi_runtime_suspend(struct device *dev)
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{
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struct spmi_device *sdev = to_spmi_device(dev);
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int err;
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err = pm_generic_runtime_suspend(dev);
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if (err)
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return err;
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return spmi_command_sleep(sdev);
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}
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static int spmi_runtime_resume(struct device *dev)
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{
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struct spmi_device *sdev = to_spmi_device(dev);
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int err;
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err = spmi_command_wakeup(sdev);
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if (err)
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return err;
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return pm_generic_runtime_resume(dev);
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}
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#endif
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static const struct dev_pm_ops spmi_pm_ops = {
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SET_RUNTIME_PM_OPS(
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spmi_runtime_suspend,
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spmi_runtime_resume,
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NULL
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)
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};
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static int spmi_device_match(struct device *dev, struct device_driver *drv)
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{
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if (of_driver_match_device(dev, drv))
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return 1;
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if (drv->name)
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return strncmp(dev_name(dev), drv->name,
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SPMI_NAME_SIZE) == 0;
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return 0;
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}
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/**
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* spmi_device_add() - add a device previously constructed via spmi_device_alloc()
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* @sdev: spmi_device to be added
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*/
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int spmi_device_add(struct spmi_device *sdev)
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{
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struct spmi_controller *ctrl = sdev->ctrl;
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int err;
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dev_set_name(&sdev->dev, "%d-%02x", ctrl->nr, sdev->usid);
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err = device_add(&sdev->dev);
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if (err < 0) {
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dev_err(&sdev->dev, "Can't add %s, status %d\n",
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dev_name(&sdev->dev), err);
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goto err_device_add;
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}
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dev_dbg(&sdev->dev, "device %s registered\n", dev_name(&sdev->dev));
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err_device_add:
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return err;
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}
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EXPORT_SYMBOL_GPL(spmi_device_add);
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/**
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* spmi_device_remove(): remove an SPMI device
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* @sdev: spmi_device to be removed
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*/
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void spmi_device_remove(struct spmi_device *sdev)
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{
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device_unregister(&sdev->dev);
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}
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EXPORT_SYMBOL_GPL(spmi_device_remove);
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static inline int
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spmi_cmd(struct spmi_controller *ctrl, u8 opcode, u8 sid)
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{
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if (!ctrl || !ctrl->cmd || ctrl->dev.type != &spmi_ctrl_type)
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return -EINVAL;
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return ctrl->cmd(ctrl, opcode, sid);
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}
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static inline int spmi_read_cmd(struct spmi_controller *ctrl, u8 opcode,
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u8 sid, u16 addr, u8 *buf, size_t len)
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{
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if (!ctrl || !ctrl->read_cmd || ctrl->dev.type != &spmi_ctrl_type)
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return -EINVAL;
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return ctrl->read_cmd(ctrl, opcode, sid, addr, buf, len);
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}
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static inline int spmi_write_cmd(struct spmi_controller *ctrl, u8 opcode,
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u8 sid, u16 addr, const u8 *buf, size_t len)
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{
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if (!ctrl || !ctrl->write_cmd || ctrl->dev.type != &spmi_ctrl_type)
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return -EINVAL;
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return ctrl->write_cmd(ctrl, opcode, sid, addr, buf, len);
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}
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/**
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* spmi_register_read() - register read
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* @sdev: SPMI device.
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* @addr: slave register address (5-bit address).
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* @buf: buffer to be populated with data from the Slave.
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*
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* Reads 1 byte of data from a Slave device register.
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*/
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int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf)
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{
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/* 5-bit register address */
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if (addr > 0x1F)
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return -EINVAL;
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return spmi_read_cmd(sdev->ctrl, SPMI_CMD_READ, sdev->usid, addr,
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buf, 1);
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}
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EXPORT_SYMBOL_GPL(spmi_register_read);
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/**
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* spmi_ext_register_read() - extended register read
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* @sdev: SPMI device.
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* @addr: slave register address (8-bit address).
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* @buf: buffer to be populated with data from the Slave.
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* @len: the request number of bytes to read (up to 16 bytes).
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*
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* Reads up to 16 bytes of data from the extended register space on a
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* Slave device.
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*/
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int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf,
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size_t len)
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{
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/* 8-bit register address, up to 16 bytes */
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if (len == 0 || len > 16)
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return -EINVAL;
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return spmi_read_cmd(sdev->ctrl, SPMI_CMD_EXT_READ, sdev->usid, addr,
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buf, len);
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}
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EXPORT_SYMBOL_GPL(spmi_ext_register_read);
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/**
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* spmi_ext_register_readl() - extended register read long
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* @sdev: SPMI device.
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* @addr: slave register address (16-bit address).
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* @buf: buffer to be populated with data from the Slave.
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* @len: the request number of bytes to read (up to 8 bytes).
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*
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* Reads up to 8 bytes of data from the extended register space on a
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* Slave device using 16-bit address.
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*/
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int spmi_ext_register_readl(struct spmi_device *sdev, u16 addr, u8 *buf,
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size_t len)
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{
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/* 16-bit register address, up to 8 bytes */
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if (len == 0 || len > 8)
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return -EINVAL;
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return spmi_read_cmd(sdev->ctrl, SPMI_CMD_EXT_READL, sdev->usid, addr,
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buf, len);
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}
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EXPORT_SYMBOL_GPL(spmi_ext_register_readl);
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/**
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* spmi_register_write() - register write
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* @sdev: SPMI device
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* @addr: slave register address (5-bit address).
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* @data: buffer containing the data to be transferred to the Slave.
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*
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* Writes 1 byte of data to a Slave device register.
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*/
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int spmi_register_write(struct spmi_device *sdev, u8 addr, u8 data)
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{
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/* 5-bit register address */
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if (addr > 0x1F)
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return -EINVAL;
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return spmi_write_cmd(sdev->ctrl, SPMI_CMD_WRITE, sdev->usid, addr,
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&data, 1);
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}
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EXPORT_SYMBOL_GPL(spmi_register_write);
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/**
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* spmi_register_zero_write() - register zero write
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* @sdev: SPMI device.
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* @data: the data to be written to register 0 (7-bits).
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*
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* Writes data to register 0 of the Slave device.
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*/
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int spmi_register_zero_write(struct spmi_device *sdev, u8 data)
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{
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return spmi_write_cmd(sdev->ctrl, SPMI_CMD_ZERO_WRITE, sdev->usid, 0,
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&data, 1);
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}
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EXPORT_SYMBOL_GPL(spmi_register_zero_write);
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/**
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* spmi_ext_register_write() - extended register write
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* @sdev: SPMI device.
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* @addr: slave register address (8-bit address).
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* @buf: buffer containing the data to be transferred to the Slave.
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* @len: the request number of bytes to read (up to 16 bytes).
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*
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* Writes up to 16 bytes of data to the extended register space of a
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* Slave device.
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*/
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int spmi_ext_register_write(struct spmi_device *sdev, u8 addr, const u8 *buf,
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size_t len)
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{
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/* 8-bit register address, up to 16 bytes */
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if (len == 0 || len > 16)
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return -EINVAL;
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return spmi_write_cmd(sdev->ctrl, SPMI_CMD_EXT_WRITE, sdev->usid, addr,
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buf, len);
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}
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EXPORT_SYMBOL_GPL(spmi_ext_register_write);
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/**
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* spmi_ext_register_writel() - extended register write long
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* @sdev: SPMI device.
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* @addr: slave register address (16-bit address).
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* @buf: buffer containing the data to be transferred to the Slave.
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* @len: the request number of bytes to read (up to 8 bytes).
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*
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* Writes up to 8 bytes of data to the extended register space of a
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* Slave device using 16-bit address.
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*/
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int spmi_ext_register_writel(struct spmi_device *sdev, u16 addr, const u8 *buf,
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size_t len)
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{
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/* 4-bit Slave Identifier, 16-bit register address, up to 8 bytes */
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if (len == 0 || len > 8)
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return -EINVAL;
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return spmi_write_cmd(sdev->ctrl, SPMI_CMD_EXT_WRITEL, sdev->usid,
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addr, buf, len);
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}
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EXPORT_SYMBOL_GPL(spmi_ext_register_writel);
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/**
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* spmi_command_reset() - sends RESET command to the specified slave
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* @sdev: SPMI device.
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*
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* The Reset command initializes the Slave and forces all registers to
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* their reset values. The Slave shall enter the STARTUP state after
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* receiving a Reset command.
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*/
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int spmi_command_reset(struct spmi_device *sdev)
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{
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return spmi_cmd(sdev->ctrl, SPMI_CMD_RESET, sdev->usid);
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}
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EXPORT_SYMBOL_GPL(spmi_command_reset);
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/**
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* spmi_command_sleep() - sends SLEEP command to the specified SPMI device
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* @sdev: SPMI device.
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*
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* The Sleep command causes the Slave to enter the user defined SLEEP state.
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*/
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int spmi_command_sleep(struct spmi_device *sdev)
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{
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return spmi_cmd(sdev->ctrl, SPMI_CMD_SLEEP, sdev->usid);
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}
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EXPORT_SYMBOL_GPL(spmi_command_sleep);
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/**
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* spmi_command_wakeup() - sends WAKEUP command to the specified SPMI device
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* @sdev: SPMI device.
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*
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* The Wakeup command causes the Slave to move from the SLEEP state to
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* the ACTIVE state.
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*/
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int spmi_command_wakeup(struct spmi_device *sdev)
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{
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return spmi_cmd(sdev->ctrl, SPMI_CMD_WAKEUP, sdev->usid);
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}
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EXPORT_SYMBOL_GPL(spmi_command_wakeup);
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/**
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* spmi_command_shutdown() - sends SHUTDOWN command to the specified SPMI device
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* @sdev: SPMI device.
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*
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* The Shutdown command causes the Slave to enter the SHUTDOWN state.
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*/
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int spmi_command_shutdown(struct spmi_device *sdev)
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{
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return spmi_cmd(sdev->ctrl, SPMI_CMD_SHUTDOWN, sdev->usid);
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}
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EXPORT_SYMBOL_GPL(spmi_command_shutdown);
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static int spmi_drv_probe(struct device *dev)
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{
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const struct spmi_driver *sdrv = to_spmi_driver(dev->driver);
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struct spmi_device *sdev = to_spmi_device(dev);
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int err;
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/* Ensure the slave is in ACTIVE state */
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err = spmi_command_wakeup(sdev);
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if (err)
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goto fail_wakeup;
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pm_runtime_get_noresume(dev);
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pm_runtime_set_active(dev);
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pm_runtime_enable(dev);
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err = sdrv->probe(sdev);
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if (err)
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goto fail_probe;
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return 0;
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fail_probe:
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pm_runtime_disable(dev);
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pm_runtime_set_suspended(dev);
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pm_runtime_put_noidle(dev);
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fail_wakeup:
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return err;
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}
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static int spmi_drv_remove(struct device *dev)
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{
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const struct spmi_driver *sdrv = to_spmi_driver(dev->driver);
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pm_runtime_get_sync(dev);
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sdrv->remove(to_spmi_device(dev));
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pm_runtime_put_noidle(dev);
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pm_runtime_disable(dev);
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pm_runtime_set_suspended(dev);
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pm_runtime_put_noidle(dev);
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return 0;
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}
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static struct bus_type spmi_bus_type = {
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.name = "spmi",
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.match = spmi_device_match,
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.pm = &spmi_pm_ops,
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.probe = spmi_drv_probe,
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.remove = spmi_drv_remove,
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};
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/**
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* spmi_controller_alloc() - Allocate a new SPMI device
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* @ctrl: associated controller
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*
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* Caller is responsible for either calling spmi_device_add() to add the
|
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* newly allocated controller, or calling spmi_device_put() to discard it.
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*/
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struct spmi_device *spmi_device_alloc(struct spmi_controller *ctrl)
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{
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struct spmi_device *sdev;
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sdev = kzalloc(sizeof(*sdev), GFP_KERNEL);
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if (!sdev)
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return NULL;
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sdev->ctrl = ctrl;
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device_initialize(&sdev->dev);
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sdev->dev.parent = &ctrl->dev;
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sdev->dev.bus = &spmi_bus_type;
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sdev->dev.type = &spmi_dev_type;
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return sdev;
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}
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EXPORT_SYMBOL_GPL(spmi_device_alloc);
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/**
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* spmi_controller_alloc() - Allocate a new SPMI controller
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* @parent: parent device
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* @size: size of private data
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*
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* Caller is responsible for either calling spmi_controller_add() to add the
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||||
* 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");
|
||||
18
include/dt-bindings/spmi/spmi.h
Normal file
18
include/dt-bindings/spmi/spmi.h
Normal file
@ -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
|
||||
@ -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,
|
||||
|
||||
191
include/linux/spmi.h
Normal file
191
include/linux/spmi.h
Normal file
@ -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
|
||||
Loading…
Reference in New Issue
Block a user