linux-kernel - Re: [PATCH 12/22] ARM: gemini: DT for the Cortina Gemini SoC platforms

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Date:   Fri, 27 Jan 2017 00:23:54 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Hans Ulli Kroll <ulli.kroll@...glemail.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Janos Laube <janos.dev@...il.com>,
        Paulius Zaleckas <paulius.zaleckas@...il.com>,
        openwrt-devel@...nwrt.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 12/22] ARM: gemini: DT for the Cortina Gemini SoC platforms

On Sunday, January 22, 2017 1:22:36 PM CET Linus Walleij wrote:
> +
> +/* Can we just use CONFIG_DEBUG_UART_PHYS and CONFIG_DEBUG_UART_VIRT? */
> +#define GEMINI_UART_BASE 0x42000000
> +#define GEMINI_UART_VBASE 0xf4200000
> +
> +/* This is needed for LL-debug/earlyprintk/debug-macro.S */
> +static struct map_desc gemini_io_desc[] __initdata = {
> +       {
> +               .virtual = GEMINI_UART_VBASE,
> +               .pfn = __phys_to_pfn(GEMINI_UART_BASE),
> +               .length = SZ_4K,
> +               .type = MT_DEVICE,
> +       },
> +};

I don't see why using CONFIG_DEBUG_UART_PHYS / CONFIG_DEBUG_UART_VIRT shouldn't
work here. Have you tried it?

	Arnd