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Date: Mon, 11 May 2026 17:10:33 +0100
From: Jonathan Cameron <jic23@kernel.org>
To: Andy Shevchenko <andriy.shevchenko@intel.com>
Cc: Stepan Ionichev <sozdayvek@gmail.com>, lars@metafoo.de,
 Michael.Hennerich@analog.com, alisa.roman@analog.com,
 dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org,
 linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4] iio: adc: ad7192: replace usleep_range() with
 fsleep()
Message-ID: <20260511171033.2000a763@jic23-huawei>
In-Reply-To: <agHZh32XjOMcPv2F@ashevche-desk.local>
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On Mon, 11 May 2026 16:28:39 +0300
Andy Shevchenko <andriy.shevchenko@intel.com> wrote:

> On Mon, May 11, 2026 at 07:55:44AM +0500, Stepan Ionichev wrote:
> > The AD7192 datasheet (Rev. A, page 34, RESET section) says:
> > "When a reset is initiated, the user must allow a period of
> > 500 us before accessing any of the on-chip registers."  
> 
> > Use fsleep(500) instead of usleep_range(500, 1000). The 500 us
> > minimum stays the same; fsleep() picks the upper slack itself
> > (about +25% on a default config).  
> 
> The second sentence here...
> 
> > Add a code comment with the datasheet reference so the "why"
> > of the wait is visible at the call site.  
> 
> ...and this paragraph are unneeded details.
> 
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
> 

Tweaked and applied.