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Message-ID: <1507872618.5452.201.camel@aj.id.au>
Subject: Re: [PATCH linux dev-4.10] aspeed: firestone: Set SIO to bypass
 UART in hostboot
From: Andrew Jeffery <andrew@aj.id.au>
To: Lei YU <mine260309@gmail.com>, openbmc@lists.ozlabs.org
Date: Fri, 13 Oct 2017 16:00:18 +1030
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On Wed, 2017-10-11 at 15:41 +0800, Lei YU wrote:
> OpenBMC fails to boot host on Firestone.
> The cause is that Firestone's hostboot hangs after disables
> SUART/VUART.
>=C2=A0
> The workaround is to make hostboot run into default SUART init
> without disabling VUART, by setting 0x170 SIO register to 0.
>=C2=A0
> With this workaround, Firestone boots OK.
>=C2=A0
> Signed-off-by: Lei YU <mine260309@gmail.com>

Applied to dev-4.10.

We really should start to think again about how best to do this from usersp=
ace.

Andrew

> ---
> =C2=A0arch/arm/mach-aspeed/aspeed.c | 4 ++++
> =C2=A01 file changed, 4 insertions(+)
>=C2=A0
> diff --git a/arch/arm/mach-aspeed/aspeed.c b/arch/arm/mach-aspeed/aspeed.=
c
> index a9e91d9..c84c871 100644
> --- a/arch/arm/mach-aspeed/aspeed.c
> +++ b/arch/arm/mach-aspeed/aspeed.c
> @@ -104,6 +104,10 @@ static void __init do_firestone_setup(void)
> =C2=A0
> =C2=A0	/* Override serial destination to use the dedicated serial port */
> =C2=A0	writel(0x00004000, AST_IO(AST_BASE_LPC | 0x174));
> +
> +	/* Workaround to make hostboot run into default SUART init */
> +	/* Otherwise it fails to boot */
> +	writel(0x00000000, AST_IO(AST_BASE_LPC | 0x170));
> =C2=A0}
> =C2=A0
> =C2=A0static void __init do_garrison_setup(void)
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