From: Javier Martinez Canillas <javier@dowhile0.org>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Ferruh Yigit <fery@cypress.com>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Henrik Rydberg <rydberg@bitmath.org>,
linux-input@vger.kernel.org
Subject: Re: [PATCH 4/7] Input: cyttsp - Reduce reset pulse timings
Date: Tue, 30 Mar 2021 12:57:57 +0200 [thread overview]
Message-ID: <CABxcv=kHCPkQdpSgbm_pNMZxBG9X++Yog5LP1qffSg6fdE4WEg@mail.gmail.com> (raw)
In-Reply-To: <20210330085424.2244653-5-linus.walleij@linaro.org>
On Tue, Mar 30, 2021 at 10:54 AM Linus Walleij <linus.walleij@linaro.org> wrote:
>
> The data sheet for CY8CTMA340 specifies that the reset pulse
> shall be at least 1 ms. Specify 1-2 ms with usleep_range()
> to cut some slack for the scheduler.
>
> Curiously the datasheet does not specify how long we have to
> wait after a hard reset until the chip is up, but I have found
> a vendor tree (Samsung GT-S7710) that has code for this touch
> screen and there this is set to 5 ms so I use this with
> the same 1 ms fuzz.
>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
Makes sense.
Reviewed-by: Javier Martinez Canillas <javier@dowhile0.org>
next prev parent reply other threads:[~2021-03-30 10:59 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-30 8:54 [PATCH 0/7] Input: cyttsp - First round of modernizations Linus Walleij
2021-03-30 8:54 ` [PATCH 1/7] Input: cyttsp - Probe from compatibles Linus Walleij
2021-03-30 10:51 ` Javier Martinez Canillas
2021-03-30 8:54 ` [PATCH 2/7] Input: cyttsp - Obtain regulators Linus Walleij
2021-03-30 10:54 ` Javier Martinez Canillas
2021-03-30 8:54 ` [PATCH 3/7] Input: cyttsp - Error message on boot mode exit error Linus Walleij
2021-03-30 10:56 ` Javier Martinez Canillas
2021-03-30 8:54 ` [PATCH 4/7] Input: cyttsp - Reduce reset pulse timings Linus Walleij
2021-03-30 10:57 ` Javier Martinez Canillas [this message]
2021-03-30 8:54 ` [PATCH 5/7] Input: cyttsp - Drop the phys path Linus Walleij
2021-03-30 11:00 ` Javier Martinez Canillas
2021-03-30 8:54 ` [PATCH 6/7] Input: cyttsp - Set abs params for ABS_MT_TOUCH_MAJOR Linus Walleij
2021-03-30 11:00 ` Javier Martinez Canillas
2021-03-30 8:54 ` [PATCH 7/7] Input: cyttsp - Flag the device properly Linus Walleij
2021-03-30 11:01 ` Javier Martinez Canillas
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