From: Shawn Guo <shawnguo@kernel.org>
To: Philippe Schenker <philippe.schenker@toradex.com>
Cc: devicetree@vger.kernel.org, Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Rob Herring <robh+dt@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ARM: dts: colibri-imx6ull: Change drive strength for usdhc2
Date: Mon, 8 Mar 2021 09:30:30 +0800 [thread overview]
Message-ID: <20210308013009.GT543@dragon> (raw)
In-Reply-To: <20210304093139.471554-1-philippe.schenker@toradex.com>
On Thu, Mar 04, 2021 at 10:31:39AM +0100, Philippe Schenker wrote:
> The current setting reflects about 86 Ohms of source-impedance
> on the SDIO signals where the WiFi board is hooked up. PCB traces are
> routed with 50 Ohms impedance and there are no serial resistors on
> those traces.
>
> This commit changes the source-impedance to 52 Ohms to better match our
> hardware design.
>
> The impedances given in this commit message refer to 3.3V operation.
>
> Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Applied, thanks.
prev parent reply other threads:[~2021-03-08 1:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-04 9:31 [PATCH] ARM: dts: colibri-imx6ull: Change drive strength for usdhc2 Philippe Schenker
2021-03-04 11:24 ` Fabio Estevam
2021-03-08 1:30 ` Shawn Guo [this message]
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