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SubjectRe: [PATCH v2 1/2] ARM: debug: Add Iproc UART3 debug addresses
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On 5/31/2018 1:22 AM, Clément Péron wrote:
> Hi Rai,
>
> On Wed, 30 May 2018 at 19:25, Ray Jui <ray.jui@broadcom.com> wrote:
>>
>> Hi Clément,
>>
>> Correct me if I'm wrong, but I thought the trend is to move to use
>> earlycon that can be activated from kernel command line for early print
>> before the serial driver is loaded.
>>
>> Have you tried earlcon?
> No, only tested this method.
>
> Thanks,
> Clement
>

If I remember it correctly, I think the trend is to use earlycon. There
are obvious shortcomings by making this configuration compile time based.

>>
>> Thanks,
>>
>> Ray
>>
>> On 5/30/2018 6:19 AM, Clément Péron wrote:
>>> From: Clément Peron <clement.peron@devialet.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@devialet.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..4ea9d5793b91 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
>>> @@ -1557,6 +1565,7 @@ config DEBUG_UART_PHYS
>>> default 0x18000400 if DEBUG_BCM_HR2
>>> default 0x18010000 if DEBUG_SIRFATLAS7_UART0
>>> default 0x18020000 if DEBUG_SIRFATLAS7_UART1
>>> + default 0x18023000 if DEBUG_BCM_IPROC_UART3
>>> default 0x1c090000 if DEBUG_VEXPRESS_UART0_RS1
>>> default 0x20001000 if DEBUG_HIP01_UART
>>> default 0x20060000 if DEBUG_RK29_UART0
>>> @@ -1676,6 +1685,7 @@ config DEBUG_UART_VIRT
>>> default 0xf1002000 if DEBUG_MT8127_UART0
>>> default 0xf1006000 if DEBUG_MT6589_UART0
>>> default 0xf1009000 if DEBUG_MT8135_UART3
>>> + default 0xf1023000 if DEBUG_BCM_IPROC_UART3
>>> default 0xf11f1000 if DEBUG_VERSATILE
>>> default 0xf1600000 if DEBUG_INTEGRATOR
>>> default 0xf1c28000 if DEBUG_SUNXI_UART0
>>> @@ -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
>>>
>>> config DEBUG_UART_8250_PALMCHIP
>>>

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