[U-Boot] [PATCH v2 2/9] ARM: rockchip: rk3188: Remove the pinctrl setup and enable uart at SPL【请注意，邮件由u-boot-bounces@lists.denx.de代发】

[Lukasz Majewski <lukma@denx.de>]

Hi Kever,

> Lukasz,
> 
> 
> On 01/19/2019 07:34 AM, Lukasz Majewski wrote:
> > Hi David,
> >  
> >> Hi Heiko,
> >>
> >> 在 2019/1/6 上午1:17, Heiko Stuebner 写道:  
> >>>> diff --git a/arch/arm/mach-rockchip/rk3188-board-spl.c
> >>>> b/arch/arm/mach-rockchip/rk3188-board-spl.c index
> >>>> 3c6c3d3c09..a5e4d39cb7 100644 ---
> >>>> a/arch/arm/mach-rockchip/rk3188-board-spl.c +++
> >>>> b/arch/arm/mach-rockchip/rk3188-board-spl.c @@ -120,7 +120,7 @@
> >>>> void board_debug_uart_init(void) 
> >>>>   void board_init_f(ulong dummy)
> >>>>   {
> >>>> -	struct udevice *pinctrl, *dev;
> >>>> +	struct udevice *dev;
> >>>>   	int ret;
> >>>>   
> >>>>   #define EARLY_UART
> >>>> @@ -134,10 +134,7 @@ void board_init_f(ulong dummy)
> >>>>   	 * printascii("string");
> >>>>   	 */
> >>>>   	debug_uart_init();
> >>>> -	printch('s');
> >>>> -	printch('p');
> >>>> -	printch('l');
> >>>> -	printch('\n');
> >>>> +	printascii("U-Boot SPL board init");    
> >>> Did you test this change?
> >>> I remember rk3188 having issues (aka hanging) when trying to print
> >>> strings through the debug uart and only printch working at all.
> >>> (Timer issue or so?) ... Not sure if this got fixed in the
> >>> meantime? 
> > But you are using the debug uart for "production". Please use the
> > proper driver.
> >
> > You may either properly setup normal uart or buffer the console
> > output until the uart is configured by device model (DM).  
> 
> If this is U-Boot proper, I would agree with you, but I don't agree
> this opinion for using in TPL, because TPL is running in limited
> SRAM, and we may not enable DM/console for it,

If I may ask - what is the limit for TPL size?

Have you considered using OF_PLATDATA with some DTS converted to C
structs?

> DEBUG_UART is pretty
> good enough and small enough for U-Boot TPL.

Do you have U-boot TPL -> SPL -> U-boot proper ?

> If everything works fine, you can just turn off the DEBUG_UART and get
> a TPL without any debug message in production, this is acceptable just
> like we
> may add silent mode for both U-Boot and Kernel in production which do
> not have any debug output.

I see your point. 

> 
> Thanks,
> - Kever
> >
> >  
> >> I don't know there was a issue, but i test it on the Radxa board
> >> today, it looks okay.
> >>
> >> U-Boot SPL board init
> >> U-Boot SPL 2019.01-rc1-00009-gdd7b9156fe (Jan 14 2019 - 19:53:50
> >> +0800) Returning to boot ROM...
> >>
> >>
> >> U-Boot 2019.01-rc1-00009-gdd7b9156fe (Jan 14 2019 - 19:53:50 +0800)
> >>
> >> Model: Radxa Rock
> >> DRAM:  2 GiB
> >> MMC:   dwmmc at 10214000: 0
> >> Loading Environment from MMC... Card did not respond to voltage
> >> select! *** Warning - No block device, using default environment
> >>
> >> In:    serial at 20064000
> >> Out:   serial at 20064000
> >> Err:   serial at 20064000
> >> Model: Radxa Rock
> >> rockchip_dnl_key_pressed: adc_channel_single_shot fail!
> >> Net:   Net Initialization Skipped
> >> No ethernet found.
> >> Hit any key to stop autoboot:  0  
> >> =>    
> >>
> >>
> >> _______________________________________________
> >> U-Boot mailing list
> >> U-Boot at lists.denx.de
> >> https://lists.denx.de/listinfo/u-boot  
> >
> >
> >
> > Best regards,
> >
> > Lukasz Majewski
> >
> > --
> >
> > DENX Software Engineering GmbH,      Managing Director: Wolfgang
> > Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell,
> > Germany Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email:
> > lukma at denx.de
> >
> >
> > _______________________________________________
> > U-Boot mailing list
> > U-Boot at lists.denx.de
> > https://lists.denx.de/listinfo/u-boot  
> 




Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma at denx.de
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