linux-kernel - Re: [PATCH 2/2] arm64: defconfig: Enable Apple Silicon drivers

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Message-ID: <20260107112059.GB4068972@robin.jannau.net>
Date: Wed, 7 Jan 2026 12:20:59 +0100
From: Janne Grunau <j@...nau.net>
To: Piotr Masłowski <piotr@...lowski.xyz>
Cc: Nick Chan <towinchenmi@...il.com>, Robin Murphy <robin.murphy@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Sven Peter <sven@...nel.org>,
	linux-kernel@...r.kernel.org, asahi@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/2] arm64: defconfig: Enable Apple Silicon drivers

On Wed, Dec 31, 2025 at 07:14:13PM +0100, Piotr Masłowski wrote:
> Hello, I'm not a kernel developer so this might be entirely irrelevant,
> but while browsing the list I noticed something you might've missed:
> 
> On Wed Dec 31, 2025 at 16:42 CET, Janne Grunau wrote:
> > From: Sven Peter <sven@...nel.org>
> >
> > Enable drivers for hardware present on Apple Silicon machines. None of
> > these drivers are critical so build them as modules.
> [...]
> > Link: https://lore.kernel.org/asahi/20250612-apple-kconfig-defconfig-v1-0-0e6f9cb512c1@kernel.org/
> > Signed-off-by: Sven Peter <sven@...nel.org>
> > Signed-off-by: Janne Grunau <j@...nau.net>
> >
> > ---
> > Changes compared to the original submission:
> > - Remove AIC and APPLE_PMGR_PWRSTATE as those are selected by ARCH_APPLE
> > - Add new macsmc drivers (mfd, reset, hwmon, rtc and gpio)
> > - Add BACKLIGHT_APPLE_DWI, DRM_PANEL_SUMMIT and NVMEM_APPLE_SPMI
> >   (suggested by Nick Chan)
> 
> What about DRM_ADP which Nick also mentioned?
> 
> > - Add PWM_APPLE and APPLE_M1_CPU_PMU
> [...]
> 
> I tried to check whether it had possibly been taken care of elsewhere,
> but I didn't find anything related on the mailing list(s) nor in the repo.

Good catch, I missed it in Nick's list. Comma or new line separated
entries would have been easier to read. I also missed the network and
bluetooth devices:

- BRCMFMAC_PCIE
- BT_HCIBCM4377
- TIGON3
- AQTION

Missing as well although only in linux-next is PHY_APPLE_ATC

What is the merge policy for defconfig changes? If this can be merged
for v6.19 I won't bother with a v2 and add them later in a subsequent
change.

If it will be picked up only for the next cycle (v7.0?) I'll send a v2
with the missing configs. Any advise how to deal with PHY_APPLE_ATC? It
depends on commit 8e98ca1e74db ("phy: apple: Add Apple Type-C PHY")
currently only in
https://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy.git/log/?h=next

Janne