[PATCH linux dev-4.10] ARM: aspeed: romulus: Add reset tolerance for power GPIOs

[Andrew Jeffery]

On Mon, 2017-10-30 at 17:20 +0800, Lei YU wrote:
> This is a similar change as Witherspoon, that enables the host to stay
> up across BMC reboots.
> 
> Signed-off-by: Lei YU <mine260309 at gmail.com>
> ---
>  arch/arm/mach-aspeed/aspeed.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm/mach-aspeed/aspeed.c b/arch/arm/mach-aspeed/aspeed.c
> index c84c871..5965bbf 100644
> --- a/arch/arm/mach-aspeed/aspeed.c
> +++ b/arch/arm/mach-aspeed/aspeed.c
> @@ -196,7 +196,17 @@ static void __init do_witherspoon_setup(void)
>  
>  static void __init do_romulus_setup(void)
>  {
> +	unsigned long reg;
> +
>  	do_common_setup();
> +
> +	/* Reset tolerance for BMC_POWER_UP (GPIOD1) */
> +	reg = readl(AST_IO(AST_BASE_GPIO | 0x01c));
> +	writel(reg | BIT(25), AST_IO(AST_BASE_GPIO | 0x01c));
> +
> +	/* Reset tolerance for SOFTWARE_PGOOD (GPIOR1) and SEQ_CONT (GPIOS7) */

What is SEQ_CONT? I'd guess at "power sequence continue". GPIOS7 doesn't have
an associated net name in the schematic I have for Romulus, though it's pulled
up to 3.3V. Maybe my schematic is out of date?

Cheers,

Andrew
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