linux-kernel - Re: [PATCH] ARM: debug: Add Iproc UART3 debug addresses

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Date:   Wed, 30 May 2018 15:38:09 +0300
From:   Baruch Siach <baruch@...s.co.il>
To:     Clément Péron <peron.clem@...il.com>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        Scott Branden <sbranden@...adcom.com>,
        Tony Lindgren <tony@...mide.com>, Ray Jui <rjui@...adcom.com>,
        Russell King <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org, Jon Mason <jonmason@...adcom.com>,
        Clément Peron <clement.peron@...ialet.com>,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        Laura Abbott <labbott@...hat.com>
Subject: Re: [PATCH] ARM: debug: Add Iproc UART3 debug addresses

Hi Clément,

On Wed, May 30, 2018 at 02:29:22PM +0200, Clément Péron wrote:
> From: Clément Peron <clement.peron@...ialet.com>
> 
> Broadcom Iproc SoCs typically use the UART3 for
> debug/console, provide a known good location for that.
> 
> Signed-off-by: Clément Peron <clement.peron@...ialet.com>
> ---
>  arch/arm/Kconfig.debug | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
> index 199ebc1c4538..fa6fa1dae94d 100644
> --- a/arch/arm/Kconfig.debug
> +++ b/arch/arm/Kconfig.debug
> @@ -207,6 +207,14 @@ choice
>  		depends on ARCH_BCM_HR2
>  		select DEBUG_UART_8250
>  
> +	config DEBUG_BCM_IPROC_UART3
> +		bool "Kernel low-level debugging on BCM IPROC UART3"
> +		depends on ARCH_BCM_CYGNUS
> +		select DEBUG_UART_8250
> +		help
> +		  Say Y here if you want the debug print routines to direct
> +		  their output to the third serial port on these devices.
> +
>  	config DEBUG_BCM_KONA_UART
>  		bool "Kernel low-level debugging messages via BCM KONA UART"
>  		depends on ARCH_BCM_MOBILE
> @@ -1564,6 +1572,7 @@ config DEBUG_UART_PHYS
>  	default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
>  	default 0x20201000 if DEBUG_BCM2835
>  	default 0x3f201000 if DEBUG_BCM2836
> +	default 0x18023000 if DEBUG_BCM_IPROC_UART3

Entries are sorted by the address value. Except that DEBUG_BCM_KONA_UART 
should be listed above DEBUG_BCM2836.

>  	default 0x3e000000 if DEBUG_BCM_KONA_UART
>  	default 0x4000e400 if DEBUG_LL_UART_EFM32
>  	default 0x40028000 if DEBUG_AT91_SAMV7_USART1
> @@ -1730,6 +1739,7 @@ config DEBUG_UART_VIRT
>  	default 0xfe018000 if DEBUG_MMP_UART3
>  	default 0xfe100000 if DEBUG_IMX23_UART || DEBUG_IMX28_UART
>  	default 0xfe230000 if DEBUG_PICOXCELL_UART
> +	default 0xf1023000 if DEBUG_BCM_IPROC_UART3

Same here.

>  	default 0xfe300000 if DEBUG_BCM_KONA_UART
>  	default 0xfe800000 if ARCH_IOP32X
>  	default 0xfeb00000 if DEBUG_HI3620_UART || DEBUG_HIX5HD2_UART
> @@ -1791,7 +1801,7 @@ config DEBUG_UART_8250_WORD
>  		DEBUG_KEYSTONE_UART0 || DEBUG_KEYSTONE_UART1 || \
>  		DEBUG_ALPINE_UART0 || \
>  		DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
> -		DEBUG_DAVINCI_DA8XX_UART2 || \
> +		DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_BCM_IPROC_UART3 || \
>  		DEBUG_BCM_KONA_UART || DEBUG_RK32_UART2

baruch

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