linux-kernel - Re: [PATCH v2 4/4] ptp: ptp_vmclock: Add device tree support

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Message-ID: <d5b28017aad83771052d4387bfec45dac289d737.camel@infradead.org>
Date: Tue, 02 Dec 2025 23:43:27 +0000
From: David Woodhouse <dwmw2@...radead.org>
To: "Chalios, Babis" <bchalios@...zon.es>, "richardcochran@...il.com"
 <richardcochran@...il.com>, "andrew+netdev@...n.ch"
 <andrew+netdev@...n.ch>,  "davem@...emloft.net" <davem@...emloft.net>,
 "edumazet@...gle.com" <edumazet@...gle.com>,  "kuba@...nel.org"
 <kuba@...nel.org>, "pabeni@...hat.com" <pabeni@...hat.com>, 
 "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc: "Graf (AWS), Alexander" <graf@...zon.de>, "mzxreary@...inter.de"
	 <mzxreary@...inter.de>
Subject: Re: [PATCH v2 4/4] ptp: ptp_vmclock: Add device tree support

On Tue, 2025-12-02 at 20:12 +0000, Chalios, Babis wrote:
> From: David Woodhouse <dwmw@...zon.co.uk>
> 
> Add device tree support to the ptp_vmclock driver, allowing it to probe
> via device tree in addition to ACPI.
> 
> Handle optional interrupt for clock disruption notifications, mirroring
> the ACPI notification behavior.
> 
> Signed-off-by: David Woodhouse <dwmw@...zon.co.uk>
> Signed-off-by: Babis Chalios <bchalios@...zon.es>
> ---
>  drivers/ptp/ptp_vmclock.c | 69 +++++++++++++++++++++++++++++++++++----
>  1 file changed, 63 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/ptp/ptp_vmclock.c b/drivers/ptp/ptp_vmclock.c
> index 49a17435bd35..1af50e06e212 100644
> --- a/drivers/ptp/ptp_vmclock.c
> +++ b/drivers/ptp/ptp_vmclock.c
> @@ -18,6 +18,7 @@
>  #include <linux/miscdevice.h>
>  #include <linux/mm.h>
>  #include <linux/module.h>
> +#include <linux/of.h>
>  #include <linux/platform_device.h>
>  #include <linux/slab.h>

Needs <linux/interrupt.h> (a few lines up) too.

...
> +static int vmclock_probe_dt(struct device *dev, struct vmclock_state *st)
> +{
> +	struct platform_device *pdev = to_platform_device(dev);
> +	struct resource *res;
> +	int irq, ret;

Those are unused now.

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