mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2024-12-29 17:23:36 +00:00
37e2d7d237
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. A couple of other includes are unused and can be dropped too. Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
142 lines
3.1 KiB
C
142 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* arch/arm/mach-socfpga/pm.c
|
|
*
|
|
* Copyright (C) 2014-2015 Altera Corporation. All rights reserved.
|
|
*
|
|
* with code from pm-imx6.c
|
|
* Copyright 2011-2014 Freescale Semiconductor, Inc.
|
|
* Copyright 2011 Linaro Ltd.
|
|
*/
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/genalloc.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/suspend.h>
|
|
#include <asm/suspend.h>
|
|
#include <asm/fncpy.h>
|
|
#include "core.h"
|
|
|
|
/* Pointer to function copied to ocram */
|
|
static u32 (*socfpga_sdram_self_refresh_in_ocram)(u32 sdr_base);
|
|
|
|
static int socfpga_setup_ocram_self_refresh(void)
|
|
{
|
|
struct platform_device *pdev;
|
|
phys_addr_t ocram_pbase;
|
|
struct device_node *np;
|
|
struct gen_pool *ocram_pool;
|
|
unsigned long ocram_base;
|
|
void __iomem *suspend_ocram_base;
|
|
int ret = 0;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "mmio-sram");
|
|
if (!np) {
|
|
pr_err("%s: Unable to find mmio-sram in dtb\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
pdev = of_find_device_by_node(np);
|
|
if (!pdev) {
|
|
pr_warn("%s: failed to find ocram device!\n", __func__);
|
|
ret = -ENODEV;
|
|
goto put_node;
|
|
}
|
|
|
|
ocram_pool = gen_pool_get(&pdev->dev, NULL);
|
|
if (!ocram_pool) {
|
|
pr_warn("%s: ocram pool unavailable!\n", __func__);
|
|
ret = -ENODEV;
|
|
goto put_device;
|
|
}
|
|
|
|
ocram_base = gen_pool_alloc(ocram_pool, socfpga_sdram_self_refresh_sz);
|
|
if (!ocram_base) {
|
|
pr_warn("%s: unable to alloc ocram!\n", __func__);
|
|
ret = -ENOMEM;
|
|
goto put_device;
|
|
}
|
|
|
|
ocram_pbase = gen_pool_virt_to_phys(ocram_pool, ocram_base);
|
|
|
|
suspend_ocram_base = __arm_ioremap_exec(ocram_pbase,
|
|
socfpga_sdram_self_refresh_sz,
|
|
false);
|
|
if (!suspend_ocram_base) {
|
|
pr_warn("%s: __arm_ioremap_exec failed!\n", __func__);
|
|
ret = -ENOMEM;
|
|
goto put_device;
|
|
}
|
|
|
|
/* Copy the code that puts DDR in self refresh to ocram */
|
|
socfpga_sdram_self_refresh_in_ocram =
|
|
(void *)fncpy(suspend_ocram_base,
|
|
&socfpga_sdram_self_refresh,
|
|
socfpga_sdram_self_refresh_sz);
|
|
|
|
WARN(!socfpga_sdram_self_refresh_in_ocram,
|
|
"could not copy function to ocram");
|
|
if (!socfpga_sdram_self_refresh_in_ocram)
|
|
ret = -EFAULT;
|
|
|
|
put_device:
|
|
put_device(&pdev->dev);
|
|
put_node:
|
|
of_node_put(np);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int socfpga_pm_suspend(unsigned long arg)
|
|
{
|
|
u32 ret;
|
|
|
|
if (!sdr_ctl_base_addr)
|
|
return -EFAULT;
|
|
|
|
ret = socfpga_sdram_self_refresh_in_ocram((u32)sdr_ctl_base_addr);
|
|
|
|
pr_debug("%s self-refresh loops request=%d exit=%d\n", __func__,
|
|
ret & 0xffff, (ret >> 16) & 0xffff);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int socfpga_pm_enter(suspend_state_t state)
|
|
{
|
|
switch (state) {
|
|
case PM_SUSPEND_MEM:
|
|
outer_disable();
|
|
cpu_suspend(0, socfpga_pm_suspend);
|
|
outer_resume();
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_suspend_ops socfpga_pm_ops = {
|
|
.valid = suspend_valid_only_mem,
|
|
.enter = socfpga_pm_enter,
|
|
};
|
|
|
|
static int __init socfpga_pm_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = socfpga_setup_ocram_self_refresh();
|
|
if (ret)
|
|
return ret;
|
|
|
|
suspend_set_ops(&socfpga_pm_ops);
|
|
pr_info("SoCFPGA initialized for DDR self-refresh during suspend.\n");
|
|
|
|
return 0;
|
|
}
|
|
arch_initcall(socfpga_pm_init);
|