From: Christoph Niedermaier <cniedermaier@dh-electronics.com>
To: Francesco Dolcini <francesco@dolcini.it>,
Marek Vasut <marex@nabladev.com>
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 10:58:19 +0000 [thread overview]
Message-ID: <794745ff1c484257bef4f17917f3cf0e@dh-electronics.com> (raw)
In-Reply-To: <20261022092536.GA232648@francesco-nb>
From: Francesco Dolcini <francesco@dolcini.it>
Sent: Thursday, October 22, 2026 11:26 AM
>
> Hello Christoph,
>
> On Thu, Oct 22, 2026 at 09:12:12AM +0000, Christoph Niedermaier wrote:
>> From: Marek Vasut <marex@nabladev.com>
>> Sent: Wednesday, October 21, 2026 8:56 PM
>>> On 10/21/26 8:37 PM, Francesco Dolcini wrote:
>>>> On Wed, Oct 21, 2026 at 07:19:30PM +0200, Marek Vasut wrote:
>>>>> On 10/21/26 3:44 PM, Christoph Niedermaier wrote:
>
> [...]
>
>>>>>> --- 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.
@Marek: If you insist, I can also remove the status line.
Regards
Christoph
prev parent reply other threads:[~2026-10-22 10:58 UTC|newest]
Thread overview: 10+ 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
2026-10-21 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 [this message]
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