mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 12:28:41 +08:00
263291fa44
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it was merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Acked-by: Sam Ravnborg <sam@ravnborg.org> Link: https://lore.kernel.org/all/20230718143211.1066810-1-robh@kernel.org/ Signed-off-by: Rob Herring <robh@kernel.org>
101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* pmc - Driver implementation for power management functions
|
|
* of Power Management Controller (PMC) on SPARCstation-Voyager.
|
|
*
|
|
* Copyright (c) 2002 Eric Brower (ebrower@usa.net)
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/oplib.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/auxio.h>
|
|
#include <asm/processor.h>
|
|
|
|
/* Debug
|
|
*
|
|
* #define PMC_DEBUG_LED
|
|
* #define PMC_NO_IDLE
|
|
*/
|
|
|
|
#define PMC_OBPNAME "SUNW,pmc"
|
|
#define PMC_DEVNAME "pmc"
|
|
|
|
#define PMC_IDLE_REG 0x00
|
|
#define PMC_IDLE_ON 0x01
|
|
|
|
static u8 __iomem *regs;
|
|
|
|
#define pmc_readb(offs) (sbus_readb(regs+offs))
|
|
#define pmc_writeb(val, offs) (sbus_writeb(val, regs+offs))
|
|
|
|
/*
|
|
* CPU idle callback function
|
|
* See .../arch/sparc/kernel/process.c
|
|
*/
|
|
static void pmc_swift_idle(void)
|
|
{
|
|
#ifdef PMC_DEBUG_LED
|
|
set_auxio(0x00, AUXIO_LED);
|
|
#endif
|
|
|
|
pmc_writeb(pmc_readb(PMC_IDLE_REG) | PMC_IDLE_ON, PMC_IDLE_REG);
|
|
|
|
#ifdef PMC_DEBUG_LED
|
|
set_auxio(AUXIO_LED, 0x00);
|
|
#endif
|
|
}
|
|
|
|
static int pmc_probe(struct platform_device *op)
|
|
{
|
|
regs = of_ioremap(&op->resource[0], 0,
|
|
resource_size(&op->resource[0]), PMC_OBPNAME);
|
|
if (!regs) {
|
|
printk(KERN_ERR "%s: unable to map registers\n", PMC_DEVNAME);
|
|
return -ENODEV;
|
|
}
|
|
|
|
#ifndef PMC_NO_IDLE
|
|
/* Assign power management IDLE handler */
|
|
sparc_idle = pmc_swift_idle;
|
|
#endif
|
|
|
|
printk(KERN_INFO "%s: power management initialized\n", PMC_DEVNAME);
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id pmc_match[] = {
|
|
{
|
|
.name = PMC_OBPNAME,
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, pmc_match);
|
|
|
|
static struct platform_driver pmc_driver = {
|
|
.driver = {
|
|
.name = "pmc",
|
|
.of_match_table = pmc_match,
|
|
},
|
|
.probe = pmc_probe,
|
|
};
|
|
|
|
static int __init pmc_init(void)
|
|
{
|
|
return platform_driver_register(&pmc_driver);
|
|
}
|
|
|
|
/* This driver is not critical to the boot process
|
|
* and is easiest to ioremap when SBus is already
|
|
* initialized, so we install ourselves thusly:
|
|
*/
|
|
__initcall(pmc_init);
|