linux-kernel - Re: [RESEND PATCH v4] clk: stm32h7: Add stm32h743 clock driver

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Message-ID: <7c0c3861-cf61-a9e2-cd5d-2ae30b8f32fa@st.com>
Date:   Thu, 29 Jun 2017 13:41:04 +0000
From:   Gabriel FERNANDEZ <gabriel.fernandez@...com>
To:     Stephen Boyd <sboyd@...eaurora.org>
CC:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        Michael Turquette <mturquette@...libre.com>,
        Nicolas Pitre <nico@...aro.org>, Arnd Bergmann <arnd@...db.de>,
        "daniel.thompson@...aro.org" <daniel.thompson@...aro.org>,
        "andrea.merello@...il.com" <andrea.merello@...il.com>,
        "radoslaw.pietrzyk@...il.com" <radoslaw.pietrzyk@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        Ludovic BARRE <ludovic.barre@...com>,
        "Olivier BIDEAU" <olivier.bideau@...com>,
        Amelie DELAUNAY <amelie.delaunay@...com>,
        "gabriel.fernandez.st@...il.com" <gabriel.fernandez.st@...il.com>,
        "Gabriel FERNANDEZ" <gabriel.fernandez@...com>
Subject: Re: [RESEND PATCH v4] clk: stm32h7: Add stm32h743 clock driver



On 06/28/2017 05:59 PM, Stephen Boyd wrote:
> On 06/27, Gabriel FERNANDEZ wrote:
>>
>> On 06/22/2017 12:07 AM, Stephen Boyd wrote:
>>> readl_poll_timeout?
>>>
>> if i use readl_poll_timeout (wich use 'ktime_get()') it can be
>> operational only after the selection of clocksource ? (device_initcall).
>> And then if a driver turn on a clock before, it could blocked the linux
>> console ?
>>
> Ok. I wonder if we could add some sort of starting check to
> readl_poll_timeout() that tests system_state for booting vs.
> scheduling? That should be sufficient to handle this case?
>
Oops i think i understood my problem...
i used readl_poll_timeout in atomic context.
I have to move my code in the .prepare ops.

If you are ok with that i will send a v5

Thanks

Gabriel