From: Krzysztof Kozlowski <krzk@kernel.org>
To: "B. Niedermayr" <benedikt.niedermayr@siemens.com>,
linux-omap@vger.kernel.org, devicetree@vger.kernel.org
Cc: rogerq@kernel.org, tony@atomide.com, robh+dt@kernel.org
Subject: Re: [PATCH 0/3] omap-gpmc wait pin additions
Date: Thu, 1 Sep 2022 15:56:19 +0300 [thread overview]
Message-ID: <8b166d0d-2b09-55f6-8078-c791653f3349@kernel.org> (raw)
In-Reply-To: <20220901124144.1006238-1-benedikt.niedermayr@siemens.com>
On 01/09/2022 15:41, B. Niedermayr wrote:
> From: Benedikt Niedermayr <benedikt.niedermayr@siemens.com>
>
> There is currently no possibility for the gpmc to set either the
> waitp-pin polarity or use the same wait-pin for different cs-regions.
>
> While the current implementation may fullfill most usecases, it may not
> be sufficient for more complex setups (e.g. FPGA/ASIC interfaces), where
> more complex interfacing options where possible.
>
> For example interfacing an ASIC which offers multiple cs-regions but
> only one waitpin the current driver and dt-bindings are not sufficient.
>
> While using the same waitpin for different cs-regions worked for older
> kernels (4.14) the omap-gpmc.c driver refused to probe (-EBUSY) with
> newer kernels (>5.10).
Please base your patches on a recent Linux kernel (judging by CC list
this is something old) - either current RC or linux-next.
Best regards,
Krzysztof
next prev parent reply other threads:[~2022-09-01 12:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-01 12:41 [PATCH 0/3] omap-gpmc wait pin additions B. Niedermayr
2022-09-01 12:41 ` [PATCH 1/3] memory: omap-gpmc: allow shared wait pins B. Niedermayr
2022-09-01 12:41 ` [PATCH 2/3] memory: omap-gpmc: add support for wait pin polarity B. Niedermayr
2022-09-01 12:41 ` [PATCH 3/3] dt-bindings: memory-controllers: gpmc-child: Add binding for wait-pin-polarity B. Niedermayr
2022-09-01 12:56 ` Krzysztof Kozlowski [this message]
2022-09-01 13:02 ` [PATCH 0/3] omap-gpmc wait pin additions Niedermayr, BENEDIKT
2022-09-01 13:11 ` Krzysztof Kozlowski
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