From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Marek Vasut <marex@denx.de>
Cc: linux-input@vger.kernel.org
Subject: Re: [PATCH v2] Input: ili210x - Fix reset timing
Date: Wed, 18 May 2022 14:32:31 -0700 [thread overview]
Message-ID: <YoVl7yPMQSSAWwbG@google.com> (raw)
In-Reply-To: <20220518204901.93534-1-marex@denx.de>
On Wed, May 18, 2022 at 10:49:01PM +0200, Marek Vasut wrote:
> According to Ilitek "231x & ILI251x Programming Guide" Version: 2.30
> "2.1. Power Sequence", "T4 Chip Reset and discharge time" is minimum
> 10ms and "T2 Chip initial time" is maximum 150ms. Adjust the reset
> timings such that T4 is 12ms and T2 is 160ms to fit those figures.
>
> This prevents sporadic touch controller start up failures when some
> systems with at least ILI251x controller boot, without this patch
> the systems sometimes fail to communicate with the touch controller.
>
> Fixes: 201f3c803544c ("Input: ili210x - add reset GPIO support")
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Applied, thank you.
--
Dmitry
prev parent reply other threads:[~2022-05-18 21:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-18 20:49 [PATCH v2] Input: ili210x - Fix reset timing Marek Vasut
2022-05-18 21:32 ` Dmitry Torokhov [this message]
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