Re: [PATCH 4/6] MIPS: Loongson64: Add 2K1000 early_printk_port
From: "Jiaxun Yang" <jiaxun.yang@flygoat.com>
Date: 2021-02-10 11:29:29
Also in:
linux-mips, lkml
On Tue, Feb 9, 2021, at 5:32 PM, Qing Zhang wrote:
Distinguish between 3A series CPU and 2K1000 CPU UART0. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Qing Zhang <redacted> Signed-off-by: Xingxing Su <redacted>
Personally I don't like this kind of quirk. Probably we should use earlycon as Arm later. - Jiaxun
quoted hunk ↗ jump to hunk
--- 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 8bef1ebab72d..a8ad02d8d088 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
-- - Jiaxun