linux-kernel - [PATCH 3/3] MIPS: Loongson64:Load LS7A dtbs

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Message-Id: <20200529034338.1137776-4-jiaxun.yang@flygoat.com>
Date:   Fri, 29 May 2020 11:43:20 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     maz@...nel.org
Cc:     Jiaxun Yang <jiaxun.yang@...goat.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Rob Herring <robh+dt@...nel.org>,
        Huacai Chen <chenhc@...ote.com>, linux-mips@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] MIPS: Loongson64:Load LS7A dtbs

Load correct devicetree according to PRID and PCH type.

Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
---
 arch/mips/loongson64/env.c | 56 +++++++++++++++++++++++---------------
 1 file changed, 34 insertions(+), 22 deletions(-)

diff --git a/arch/mips/loongson64/env.c b/arch/mips/loongson64/env.c
index d11bc346bbca..9b56f4a80b62 100644
--- a/arch/mips/loongson64/env.c
+++ b/arch/mips/loongson64/env.c
@@ -126,28 +126,6 @@ void __init prom_init_env(void)
 		loongson_sysconf.cores_per_node - 1) /
 		loongson_sysconf.cores_per_node;
 
-	if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64C) {
-		switch (read_c0_prid() & PRID_REV_MASK) {
-		case PRID_REV_LOONGSON3A_R1:
-		case PRID_REV_LOONGSON3A_R2_0:
-		case PRID_REV_LOONGSON3A_R2_1:
-		case PRID_REV_LOONGSON3A_R3_0:
-		case PRID_REV_LOONGSON3A_R3_1:
-			loongson_fdt_blob = __dtb_loongson3_4core_rs780e_begin;
-			break;
-		case PRID_REV_LOONGSON3B_R1:
-		case PRID_REV_LOONGSON3B_R2:
-			loongson_fdt_blob = __dtb_loongson3_8core_rs780e_begin;
-			break;
-		default:
-			break;
-		}
-	}
-
-
-	if (!loongson_fdt_blob)
-		pr_err("Failed to determine built-in Loongson64 dtb\n");
-
 	loongson_sysconf.pci_mem_start_addr = eirq_source->pci_mem_start_addr;
 	loongson_sysconf.pci_mem_end_addr = eirq_source->pci_mem_end_addr;
 	loongson_sysconf.pci_io_base = eirq_source->pci_io_start_addr;
@@ -198,4 +176,38 @@ void __init prom_init_env(void)
 		loongson_sysconf.bridgetype = RS780E;
 		loongson_sysconf.early_config = rs780e_early_config;
 	}
+
+	if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64C) {
+		switch (read_c0_prid() & PRID_REV_MASK) {
+		case PRID_REV_LOONGSON3A_R1:
+		case PRID_REV_LOONGSON3A_R2_0:
+		case PRID_REV_LOONGSON3A_R2_1:
+		case PRID_REV_LOONGSON3A_R3_0:
+		case PRID_REV_LOONGSON3A_R3_1:
+			switch (loongson_sysconf.bridgetype) {
+			case RS780E:
+				loongson_fdt_blob = __dtb_loongson3_4core_rs780e_begin;
+				break;
+			case LS7A:
+				loongson_fdt_blob = __dtb_loongson3_4core_ls7a_begin;
+				break;
+			default:
+				break;
+			}
+			break;
+		case PRID_REV_LOONGSON3B_R1:
+		case PRID_REV_LOONGSON3B_R2:
+			if (loongson_sysconf.bridgetype == RS780E)
+				loongson_fdt_blob = __dtb_loongson3_8core_rs780e_begin;
+			break;
+		default:
+			break;
+		}
+	} else if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64G) {
+		if (loongson_sysconf.bridgetype == LS7A)
+			loongson_fdt_blob = __dtb_loongson3_r4_ls7a_begin;
+	}
+
+	if (!loongson_fdt_blob)
+		pr_err("Failed to determine built-in Loongson64 dtb\n");
 }
-- 
2.27.0.rc0