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authorHou Zhiqiang <Zhiqiang.Hou@nxp.com>2016-07-29 18:26:36 +0800
committerYork Sun <york.sun@nxp.com>2016-08-02 09:47:49 -0700
commit2c774165449ebb180060b8596764140cfb00a1e1 (patch)
tree64b5dcf3c2d369bbac88c33db627230367ff5cca /arch
parent388aabc85d4c6a0e603e45421e7e2edadd9f24ac (diff)
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arm/PSCI: Fixed the backward compatiblity issue
Appended the compatible strings of old version PSCI to the latest version supported. And there are some psci functions' property must be added to DT only for psci version 0.1, including cpu_on, cpu_off, cpu_suspend, migrate. Note, ARMv8 Secure Firmware Framework doesn't support PSCI ver 0.1. Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> Reviewed-by: York Sun <york.sun@nxp.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/include/asm/psci.h3
-rw-r--r--arch/arm/lib/psci-dt.c61
2 files changed, 38 insertions, 26 deletions
diff --git a/arch/arm/include/asm/psci.h b/arch/arm/include/asm/psci.h
index 8aefaa7..5b8ce4d 100644
--- a/arch/arm/include/asm/psci.h
+++ b/arch/arm/include/asm/psci.h
@@ -18,6 +18,9 @@
#ifndef __ARM_PSCI_H__
#define __ARM_PSCI_H__
+#define ARM_PSCI_VER_1_0 (0x00010000)
+#define ARM_PSCI_VER_0_2 (0x00000002)
+
/* PSCI 0.1 interface */
#define ARM_PSCI_FN_BASE 0x95c1ba5e
#define ARM_PSCI_FN(n) (ARM_PSCI_FN_BASE + (n))
diff --git a/arch/arm/lib/psci-dt.c b/arch/arm/lib/psci-dt.c
index bcd92e7..af49c24 100644
--- a/arch/arm/lib/psci-dt.c
+++ b/arch/arm/lib/psci-dt.c
@@ -19,7 +19,6 @@ int fdt_psci(void *fdt)
#if defined(CONFIG_ARMV8_PSCI) || defined(CONFIG_ARMV7_PSCI)
int nodeoff;
unsigned int psci_ver = 0;
- char *psci_compt;
int tmp;
nodeoff = fdt_path_offset(fdt, "/cpus");
@@ -68,39 +67,49 @@ init_psci_node:
psci_ver = sec_firmware_support_psci_version();
#endif
switch (psci_ver) {
- case 0x00010000:
- psci_compt = "arm,psci-1.0";
- break;
- case 0x00000002:
- psci_compt = "arm,psci-0.2";
- break;
+ case ARM_PSCI_VER_1_0:
+ tmp = fdt_setprop_string(fdt, nodeoff,
+ "compatible", "arm,psci-1.0");
+ if (tmp)
+ return tmp;
+ case ARM_PSCI_VER_0_2:
+ tmp = fdt_appendprop_string(fdt, nodeoff,
+ "compatible", "arm,psci-0.2");
+ if (tmp)
+ return tmp;
default:
- psci_compt = "arm,psci";
+ /*
+ * The Secure firmware framework isn't able to support PSCI version 0.1.
+ */
+#ifndef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
+ 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
break;
}
- tmp = fdt_setprop_string(fdt, nodeoff, "compatible", psci_compt);
- if (tmp)
- return tmp;
tmp = fdt_setprop_string(fdt, nodeoff, "method", "smc");
if (tmp)
return tmp;
-#ifdef CONFIG_ARMV7_PSCI
- 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
#endif
return 0;
}