mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 13:14:27 +00:00
74c69cdcc0
When fixing up the DT to report PSCI support, explicitly enable the node. DTs may ship with the node disabled in case a PSCI implementation is not present, and expect any PSCI implementation to enable the node if they are actually present. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
125 lines
2.8 KiB
C
125 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2016 NXP Semiconductor, Inc.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <linux/libfdt.h>
|
|
#include <fdt_support.h>
|
|
#include <linux/sizes.h>
|
|
#include <linux/kernel.h>
|
|
#include <asm/psci.h>
|
|
#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
|
|
#include <asm/armv8/sec_firmware.h>
|
|
#endif
|
|
|
|
int fdt_psci(void *fdt)
|
|
{
|
|
#if defined(CONFIG_ARMV7_PSCI) || defined(CONFIG_ARMV8_PSCI) || \
|
|
defined(CONFIG_SEC_FIRMWARE_ARMV8_PSCI)
|
|
int nodeoff;
|
|
unsigned int psci_ver = 0;
|
|
int tmp;
|
|
|
|
nodeoff = fdt_path_offset(fdt, "/cpus");
|
|
if (nodeoff < 0) {
|
|
printf("couldn't find /cpus\n");
|
|
return nodeoff;
|
|
}
|
|
|
|
/* add 'enable-method = "psci"' to each cpu node */
|
|
for (tmp = fdt_first_subnode(fdt, nodeoff);
|
|
tmp >= 0;
|
|
tmp = fdt_next_subnode(fdt, tmp)) {
|
|
const struct fdt_property *prop;
|
|
int len;
|
|
|
|
prop = fdt_get_property(fdt, tmp, "device_type", &len);
|
|
if (!prop)
|
|
continue;
|
|
if (len < 4)
|
|
continue;
|
|
if (strcmp(prop->data, "cpu"))
|
|
continue;
|
|
|
|
/*
|
|
* Not checking rv here, our approach is to skip over errors in
|
|
* individual cpu nodes, hopefully some of the nodes are
|
|
* processed correctly and those will boot
|
|
*/
|
|
fdt_setprop_string(fdt, tmp, "enable-method", "psci");
|
|
}
|
|
|
|
nodeoff = fdt_path_offset(fdt, "/psci");
|
|
if (nodeoff >= 0)
|
|
goto init_psci_node;
|
|
|
|
nodeoff = fdt_path_offset(fdt, "/");
|
|
if (nodeoff < 0)
|
|
return nodeoff;
|
|
|
|
nodeoff = fdt_add_subnode(fdt, nodeoff, "psci");
|
|
if (nodeoff < 0)
|
|
return nodeoff;
|
|
|
|
init_psci_node:
|
|
#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
|
|
psci_ver = sec_firmware_support_psci_version();
|
|
#elif defined(CONFIG_ARMV7_PSCI_1_0) || defined(CONFIG_ARMV8_PSCI)
|
|
psci_ver = ARM_PSCI_VER_1_0;
|
|
#elif defined(CONFIG_ARMV7_PSCI_0_2)
|
|
psci_ver = ARM_PSCI_VER_0_2;
|
|
#endif
|
|
if (psci_ver >= ARM_PSCI_VER_1_0) {
|
|
tmp = fdt_setprop_string(fdt, nodeoff,
|
|
"compatible", "arm,psci-1.0");
|
|
if (tmp)
|
|
return tmp;
|
|
}
|
|
|
|
if (psci_ver >= ARM_PSCI_VER_0_2) {
|
|
tmp = fdt_appendprop_string(fdt, nodeoff,
|
|
"compatible", "arm,psci-0.2");
|
|
if (tmp)
|
|
return tmp;
|
|
}
|
|
|
|
#ifndef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
|
|
/*
|
|
* The Secure firmware framework isn't able to support PSCI version 0.1.
|
|
*/
|
|
if (psci_ver < ARM_PSCI_VER_0_2) {
|
|
tmp = fdt_appendprop_string(fdt, nodeoff,
|
|
"compatible", "arm,psci");
|
|
if (tmp)
|
|
return tmp;
|
|
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_suspend",
|
|
ARM_PSCI_FN_CPU_SUSPEND);
|
|
if (tmp)
|
|
return tmp;
|
|
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_off",
|
|
ARM_PSCI_FN_CPU_OFF);
|
|
if (tmp)
|
|
return tmp;
|
|
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_on",
|
|
ARM_PSCI_FN_CPU_ON);
|
|
if (tmp)
|
|
return tmp;
|
|
tmp = fdt_setprop_u32(fdt, nodeoff, "migrate",
|
|
ARM_PSCI_FN_MIGRATE);
|
|
if (tmp)
|
|
return tmp;
|
|
}
|
|
#endif
|
|
|
|
tmp = fdt_setprop_string(fdt, nodeoff, "method", "smc");
|
|
if (tmp)
|
|
return tmp;
|
|
|
|
tmp = fdt_setprop_string(fdt, nodeoff, "status", "okay");
|
|
if (tmp)
|
|
return tmp;
|
|
|
|
#endif
|
|
return 0;
|
|
}
|