linux-kernel - Re: [PATCH] ARM: dts: imx6dl-yapp43: Increase LED current to match the yapp4 HW design

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <Zrn2lL6E1IEBAlYj@dragon>
Date: Mon, 12 Aug 2024 19:48:36 +0800
From: Shawn Guo <shawnguo2@...h.net>
To: Michal Vokáč <michal.vokac@...ft.com>
Cc: Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	NXP Linux Team <linux-imx@....com>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: imx6dl-yapp43: Increase LED current to match
 the yapp4 HW design

On Tue, Jul 23, 2024 at 04:25:19PM +0200, Michal Vokáč wrote:
> On the imx6dl-yapp4 revision based boards, the RGB LED is not driven
> directly by the LP5562 driver but through FET transistors. Hence the LED
> current is not determined by the driver but by the LED series resistors.
> 
> On the imx6dl-yapp43 revision based boards, we removed the FET transistors
> to drive the LED directly from the LP5562 but forgot to tune the output
> current to match the previous HW design.
> 
> Set the LED current on imx6dl-yapp43 based boards to the same values
> measured on the imx6dl-yapp4 boards and limit the maximum current to 20mA.
> 
> Fixes: 7da4734751e0 ("ARM: dts: imx6dl-yapp43: Add support for new HW revision of the IOTA board")
> Cc: <stable@...r.kernel.org>
> Signed-off-by: Michal Vokáč <michal.vokac@...ft.com>

Applied, thanks!