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From: Marek Vasut <marex@denx.de>
To: u-boot@lists.denx.de
Subject: [RFC PATCH] imx: imx8mm-evk/imx8mn-evk: enable sysreset driver for SPL
Date: Fri, 17 Jan 2020 10:32:34 +0100	[thread overview]
Message-ID: <3b3c46f0-e99a-2d06-be9c-a122ce343227@denx.de> (raw)
In-Reply-To: <AM0PR04MB448105A93D9734D831F9F71888310@AM0PR04MB4481.eurprd04.prod.outlook.com>

On 1/17/20 3:33 AM, Peng Fan wrote:
> Hi Marek,

Hi,

>> Subject: Re: [RFC PATCH] imx: imx8mm-evk/imx8mn-evk: enable sysreset
>> driver for SPL
>>
>> On 1/16/20 3:21 AM, Peng Fan wrote:
>>
>> Hello Peng,
>>
>>>> Subject: [RFC PATCH] imx: imx8mm-evk/imx8mn-evk: enable sysreset
>>>> driver for SPL
>>>>
>>>
>>> NAK, this will not work on i.MX8MM/N.
>>>
>>> Currently sysreset psci is enabled, however psci will not work for
>>> SPL, because SPL boots before BL31.
>>
>> Thank you for the constructive feedback.
>>
>> So basically , what we need is a real sysreset driver for iMX8MM , which can
>> work with bare-bones hardware interface, that is, poking some register,
>> correct ?
> 
> Yes.
> 
>>
>> So, either you or Claudius needs to implement a driver in drivers/sysreset,
>> which will bind in SPL and if needed, do some writel() into some registers to
>> reset the board, correct ?
> 
> Yes.
> 
>>
>> Because, I believe we can both agree that dumping such ad-hoc code which
>> implements reset in board code is not the right way, esp. nowadays with all
>> the DM/DT stuff in.
> 
> Alought we still have ocram space, but our SPL is huge now, 100KB+

How so ?

How much does DM sysreset add to that ?

  reply	other threads:[~2020-01-17  9:32 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-28  8:56 [U-Boot] [PATCH] ARM: reset: use do_reset in SPL/TPL if SYSRESET was not enabled for them Claudius Heine
2019-11-28  9:22 ` Marek Vasut
2019-11-28  9:27 ` Simon Goldschmidt
2019-11-28 10:52   ` Claudius Heine
2019-11-28 11:31     ` Simon Goldschmidt
2020-01-10 21:48 ` Tom Rini
2020-01-14  9:59   ` Claudius Heine
2020-01-14 10:18     ` Peter Robinson
2020-01-14 12:02       ` Claudius Heine
2020-01-15 14:49     ` [RFC PATCH] imx: imx8mm-evk/imx8mn-evk: enable sysreset driver for SPL Claudius Heine
2020-01-16  0:10       ` Simon Glass
2020-01-16  2:21       ` Peng Fan
2020-01-16  9:27         ` Marek Vasut
2020-01-17  2:33           ` Peng Fan
2020-01-17  9:32             ` Marek Vasut [this message]
2020-01-19  7:48               ` Peng Fan
2020-01-19 14:10                 ` Marek Vasut

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