Re: [PATCH net-next 2/2] drivers: net: dsa: mt7530: MT7530 optional GPIO support
From: DENG Qingfang <dqfext@gmail.com>
Date: 2021-01-11 13:40:48
Also in:
linux-arm-kernel, linux-devicetree, lkml, netdev
On Mon, Jan 11, 2021 at 7:04 PM Russell King - ARM Linux admin [off-list ref] wrote:
FYI, Documentation/driver-api/gpio/consumer.rst says: For output GPIOs, the value provided becomes the initial output value. This helps avoid signal glitching during system startup. Setting the pin to be an output, and then setting its initial value does not avoid the glitch. You may wish to investigate whether you can set the value before setting the pin as an output to avoid this issue.
So, setting the Output Enable bit _after_ setting the direction and initial value should avoid this issue. Right? _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek