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Message-Id: <20210303062434.22280-5-zhangqing@loongson.cn>
Date: Wed, 3 Mar 2021 14:24:31 +0800
From: Qing Zhang <zhangqing@...ngson.cn>
To: Rob Herring <robh+dt@...nel.org>,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
Huacai Chen <chenhuacai@...nel.org>,
Jiaxun Yang <jiaxun.yang@...goat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Marc Zyngier <maz@...nel.org>
Cc: devicetree@...r.kernel.org, linux-mips@...r.kernel.org,
linux-kernel@...r.kernel.org, Xingxing Su <suxingxing@...ngson.cn>
Subject: [PATCH v2 4/7] MIPS: Loongson64: Add 2K1000 early_printk_port
Distinguish between 3A series CPU and 2K1000 CPU UART0.
Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
Signed-off-by: Qing Zhang <zhangqing@...ngson.cn>
Signed-off-by: Xingxing Su <suxingxing@...ngson.cn>
---
v2:
- No changes
arch/mips/loongson64/init.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/mips/loongson64/init.c b/arch/mips/loongson64/init.c
index ed280b73bf89..d5a1eddb8202 100644
--- a/arch/mips/loongson64/init.c
+++ b/arch/mips/loongson64/init.c
@@ -120,7 +120,10 @@ void __init prom_init(void)
#endif
/* Hardcode to CPU UART 0 */
- setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024);
+ if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64R)
+ setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE), 0, 1024);
+ else
+ setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024);
register_smp_ops(&loongson3_smp_ops);
board_nmi_handler_setup = mips_nmi_setup;
--
2.20.1
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