mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-01 00:49:43 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2016 NXP Semiconductor, Inc.
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*/
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#include <common.h>
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#include <linux/libfdt.h>
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#include <fdt_support.h>
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#include <linux/sizes.h>
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#include <linux/kernel.h>
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#include <asm/psci.h>
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#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
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#include <asm/armv8/sec_firmware.h>
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#endif
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int fdt_psci(void *fdt)
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{
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#if defined(CONFIG_ARMV7_PSCI) || defined(CONFIG_ARMV8_PSCI) || \
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defined(CONFIG_SEC_FIRMWARE_ARMV8_PSCI)
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int nodeoff;
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unsigned int psci_ver = 0;
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int tmp;
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nodeoff = fdt_path_offset(fdt, "/cpus");
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if (nodeoff < 0) {
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printf("couldn't find /cpus\n");
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return nodeoff;
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}
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/* add 'enable-method = "psci"' to each cpu node */
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for (tmp = fdt_first_subnode(fdt, nodeoff);
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tmp >= 0;
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tmp = fdt_next_subnode(fdt, tmp)) {
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const struct fdt_property *prop;
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int len;
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prop = fdt_get_property(fdt, tmp, "device_type", &len);
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if (!prop)
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continue;
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if (len < 4)
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continue;
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if (strcmp(prop->data, "cpu"))
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continue;
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/*
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* Not checking rv here, our approach is to skip over errors in
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* individual cpu nodes, hopefully some of the nodes are
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* processed correctly and those will boot
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*/
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fdt_setprop_string(fdt, tmp, "enable-method", "psci");
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}
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nodeoff = fdt_path_offset(fdt, "/psci");
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if (nodeoff >= 0)
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goto init_psci_node;
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nodeoff = fdt_path_offset(fdt, "/");
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if (nodeoff < 0)
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return nodeoff;
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nodeoff = fdt_add_subnode(fdt, nodeoff, "psci");
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if (nodeoff < 0)
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return nodeoff;
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init_psci_node:
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#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
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psci_ver = sec_firmware_support_psci_version();
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#elif defined(CONFIG_ARMV7_PSCI_1_0) || defined(CONFIG_ARMV8_PSCI)
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psci_ver = ARM_PSCI_VER_1_0;
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#endif
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if (psci_ver >= ARM_PSCI_VER_1_0) {
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tmp = fdt_setprop_string(fdt, nodeoff,
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"compatible", "arm,psci-1.0");
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if (tmp)
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return tmp;
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}
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if (psci_ver >= ARM_PSCI_VER_0_2) {
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tmp = fdt_appendprop_string(fdt, nodeoff,
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"compatible", "arm,psci-0.2");
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if (tmp)
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return tmp;
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}
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#ifndef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
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/*
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* The Secure firmware framework isn't able to support PSCI version 0.1.
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*/
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if (psci_ver < ARM_PSCI_VER_0_2) {
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tmp = fdt_appendprop_string(fdt, nodeoff,
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"compatible", "arm,psci");
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if (tmp)
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return tmp;
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tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_suspend",
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ARM_PSCI_FN_CPU_SUSPEND);
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if (tmp)
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return tmp;
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tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_off",
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ARM_PSCI_FN_CPU_OFF);
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if (tmp)
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return tmp;
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tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_on",
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ARM_PSCI_FN_CPU_ON);
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if (tmp)
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return tmp;
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tmp = fdt_setprop_u32(fdt, nodeoff, "migrate",
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ARM_PSCI_FN_MIGRATE);
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if (tmp)
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return tmp;
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}
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#endif
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tmp = fdt_setprop_string(fdt, nodeoff, "method", "smc");
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if (tmp)
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return tmp;
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#endif
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return 0;
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}
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