From: Shawn Guo <shawnguo@kernel.org>
To: Lucas Stach <dev@lynxeye.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>,
NXP Linux Team <linux-imx@nxp.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] arm64: dts: imx8mq: disable DDRC node by default
Date: Wed, 26 Jan 2022 21:10:34 +0800 [thread overview]
Message-ID: <20220126131033.GW4686@dragon> (raw)
In-Reply-To: <20211218181808.235310-1-dev@lynxeye.de>
On Sat, Dec 18, 2021 at 07:18:08PM +0100, Lucas Stach wrote:
> Without a OPP table or a downstream TF-A running on the system the DDRC will
> fail to probe, as it has no means to scale the DRAM frequency in that case.
> This however will block the bus scaling driver to come up and this in turn
> prevents other devices that hook into the interconnect from probing.
>
> If the DDRC is disabled, the interconnect driver will simply ignore it. As
> most systems don't want to scale the DRAM frequency, disable the node by
> default and only enable it on the systems that actually uses this
> capability and provides a valid OPP table in the DT.
>
> Signed-off-by: Lucas Stach <dev@lynxeye.de>
> Reviewed-by: Fabio Estevam <festevam@gmail.com>
> Acked-by: Martin Kepplinger <martin.kepplinger@puri.sm>
> Reviewed-by: Guido Günther <agx@sigxcpu.org>
Applied, thanks!
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prev parent reply other threads:[~2022-01-26 13:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-18 18:18 [PATCH v2] arm64: dts: imx8mq: disable DDRC node by default Lucas Stach
2022-01-26 13:10 ` Shawn Guo [this message]
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