From: Marek Vasut <marex@nabladev.com>
To: Christoph Niedermaier <cniedermaier@dh-electronics.com>,
Francesco Dolcini <francesco@dolcini.it>
Cc: "linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>, Frank Li <Frank.Li@nxp.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"imx@lists.linux.dev" <imx@lists.linux.dev>,
kernel <kernel@dh-electronics.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] ARM: dts: imx6ull-dhcor-maveo-box: Remove unused SPI device
Date: Thu, 22 Oct 2026 13:34:24 +0200 [thread overview]
Message-ID: <948d901e-ee1c-45f3-9946-30cea28a6128@nabladev.com> (raw)
In-Reply-To: <794745ff1c484257bef4f17917f3cf0e@dh-electronics.com>
On 10/22/26 12:58 PM, Christoph Niedermaier wrote:
Hello Christoph,
>>>>>>> --- a/arch/arm/boot/dts/nxp/imx/imx6ull-dhcor-maveo-box.dts
>>>>>>> +++ b/arch/arm/boot/dts/nxp/imx/imx6ull-dhcor-maveo-box.dts
>>>>>>> @@ -60,14 +60,6 @@ &ecspi4 {
>>>>>>> pinctrl-0 = <&pinctrl_ecspi4>;
>>>>>>> pinctrl-names = "default";
>>>>>>> status = "okay";
>>>>>>
>>>>>> Drop "status = "okay"" too , since this controller will be unused ?
>>>>>
>>>>> you can instantiate a new device on the SPI bus from userspace. up to
>>>>> you, but if I was a user I would appreciate to have it enabled.
>>>> Good point -- Christoph, is this the (use)case here , can the user do that?
>>>
>>> I don't think that's the case, since there isn't currently an SPI device
>>> connected to this interface. Nevertheless, I'd be interested to know how
>>> to instantiate a new device from user space.
>>
>> Documentation/spi/instantiating-devices.rst
>
> This is a relatively new document, I haven't seen it yet. Thank you very much.
>
> I'm now leaning toward leaving the interface set to “okay” so that the existing
> SPI pins on X10 connector can easily accessed in the future.
If you connect anything more complex than a simple device, you would
anyway need a DT overlay for this.
> @Marek: If you insist, I can also remove the status line.
Either way is fine by me, but consider the above.
prev parent reply other threads:[~2026-10-22 12:55 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-21 13:44 Christoph Niedermaier
2026-10-21 13:44 ` [PATCH 2/2] ARM: dts: imx6ull-dhcor-maveo-box: Correct PCB number Christoph Niedermaier
2026-10-21 17:20 ` Marek Vasut
2026-10-22 8:59 ` Christoph Niedermaier
2026-10-22 10:45 ` Marek Vasut
2026-10-21 17:19 ` [PATCH 1/2] ARM: dts: imx6ull-dhcor-maveo-box: Remove unused SPI device Marek Vasut
2026-10-21 18:37 ` Francesco Dolcini
2026-10-21 18:55 ` Marek Vasut
2026-10-22 9:12 ` Christoph Niedermaier
2026-10-22 9:25 ` Francesco Dolcini
2026-10-22 10:58 ` Christoph Niedermaier
2026-10-22 11:34 ` Marek Vasut [this message]
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