Messages in this thread | | | Date | Mon, 31 Jan 2022 14:12:39 +0100 | Subject | Re: [PATCH v9 03/13] ARM: Add basic support for Airoha EN7523 SoC | From | John Crispin <> |
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On 31.01.22 14:00, Robert Marko wrote: > On Mon, Jan 31, 2022 at 1:57 PM Felix Fietkau <nbd@nbd.name> wrote: >> >> >> On 31.01.22 11:51, Luka Perkov wrote: >>> Hello Felix, >>> >>> On Sun, Jan 30, 2022 at 3:56 PM Felix Fietkau <nbd@nbd.name> wrote: >>>> >>>> From: John Crispin <john@phrozen.org> >>>> >>>> EN7523 is an armv8 based silicon used inside broadband access type devices >>>> such as xPON and xDSL. It shares various silicon blocks with MediaTek >>>> silicon such as the MT7622. >>>> >>>> Add basic support for Airoha EN7523, enough for booting to console. >>>> >>>> The UART is basically 8250-compatible, except for the clock selection. >>>> A clock-frequency value is synthesized to get this to run at 115200 bps. >>>> >>>> Signed-off-by: John Crispin <john@phrozen.org> >>>> Signed-off-by: Bert Vermeulen <bert@biot.com> >>>> Signed-off-by: Felix Fietkau <nbd@nbd.name> >>>> --- >>>> index 000000000000..ea23b5abb478 >>>> --- /dev/null >>>> +++ b/arch/arm/mach-airoha/airoha.c >>>> @@ -0,0 +1,16 @@ >>>> +// SPDX-License-Identifier: GPL-2.0-or-later >>>> +/* >>>> + * Device Tree support for Airoha SoCs >>>> + * >>>> + * Copyright (c) 2022 Felix Fietkau <nbd@nbd.name> >>>> + */ >>>> +#include <asm/mach/arch.h> >>>> + >>>> +static const char * const airoha_board_dt_compat[] = { >>>> + "airoha,en7523", >>>> + NULL, >>>> +}; >>>> + >>>> +DT_MACHINE_START(MEDIATEK_DT, "Airoha Cortex-A53 (Device Tree)") >>> >>> Since this is Cortex-A53 core is there a reason why this is not placed >>> within arm64 directory? >> From what I can tell, it's a stripped-down core that only runs in >> 32-bit mode. > > Hmm, this is new for me that you could do that to an ARMv8 (A53) core. > I know that you can run ARMv7 code but not that you can reduce it to > 32 bit only. > > Regards, > Robert
the bootrom and vendor bootloader do not support 64bit more. John
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