From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Boyd <sboyd@codeaurora.org>
Subject: Re: [RESEND PATCH v4] clk: stm32h7: Add stm32h743 clock driver
Date: Thu, 29 Jun 2017 17:20:08 -0700
Message-ID: <20170630002008.GD22780@codeaurora.org>
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To: Gabriel FERNANDEZ <gabriel.fernandez@st.com>
Cc: Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Russell King <linux@armlinux.org.uk>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, Alexandre TORGUE <alexandre.torgue@st.com>, Michael Turquette <mturquette@baylibre.com>, Nicolas Pitre <nico@linaro.org>, Arnd Bergmann <arnd@arndb.de>, "daniel.thompson@linaro.org" <daniel.thompson@linaro.org>, "andrea.merello@gmail.com" <andrea.merello@gmail.com>, "radoslaw.pietrzyk@gmail.com" <radoslaw.pietrzyk@gmail.com>, Lee Jones <lee.jones@linaro.org>, "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>
List-Id: devicetree@vger.kernel.org

On 06/29, Gabriel FERNANDEZ wrote:
> 
> 
> 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
> 

There's readl_poll_timeout_atomic() for those modes.

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