netdev - Re: [PATCH v3 12/20] phy: rockchip-usb: switch to FIELD_PREP

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Message-ID: <5249188.NgBsaNRSFp@phil>
Date: Wed, 27 Aug 2025 09:34:44 +0200
From: Heiko Stuebner <heiko@...ech.de>
To: Yury Norov <yury.norov@...il.com>,
 Rasmus Villemoes <linux@...musvillemoes.dk>,
 Jaehoon Chung <jh80.chung@...sung.com>, Ulf Hansson <ulf.hansson@...aro.org>,
 Shreeya Patel <shreeya.patel@...labora.com>,
 Mauro Carvalho Chehab <mchehab@...nel.org>, Sandy Huang <hjc@...k-chips.com>,
 Andy Yan <andy.yan@...k-chips.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>,
 Nicolas Frattaroli <frattaroli.nicolas@...il.com>,
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
 Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Shawn Lin <shawn.lin@...k-chips.com>,
 Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Krzysztof Wilczyński <kwilczynski@...nel.org>,
 Manivannan Sadhasivam <mani@...nel.org>, Rob Herring <robh@...nel.org>,
 Bjorn Helgaas <bhelgaas@...gle.com>, Chanwoo Choi <cw00.choi@...sung.com>,
 MyungJoo Ham <myungjoo.ham@...sung.com>,
 Kyungmin Park <kyungmin.park@...sung.com>, Qin Jian <qinjian@...lus1.com>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>,
 Nathan Chancellor <nathan@...nel.org>,
 Nick Desaulniers <nick.desaulniers+lkml@...il.com>,
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 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Cc: kernel@...labora.com, linux-kernel@...r.kernel.org,
 linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-media@...r.kernel.org,
 dri-devel@...ts.freedesktop.org, linux-phy@...ts.infradead.org,
 linux-sound@...r.kernel.org, netdev@...r.kernel.org,
 linux-stm32@...md-mailman.stormreply.com, linux-pci@...r.kernel.org,
 linux-pm@...r.kernel.org, linux-clk@...r.kernel.org, llvm@...ts.linux.dev,
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject:
 Re: [PATCH v3 12/20] phy: rockchip-usb: switch to FIELD_PREP_WM16 macro

Am Montag, 25. August 2025, 10:28:32 Mitteleuropäische Sommerzeit schrieb Nicolas Frattaroli:
> The era of hand-rolled HIWORD_UPDATE macros is over, at least for those
> drivers that use constant masks.
> 
> Remove this driver's HIWORD_UPDATE macro, and replace all instances of
> it with (hopefully) equivalent FIELD_PREP_WM16 instances. To do this, a
> few of the defines are being adjusted, as FIELD_PREP_WM16 shifts up the
> value for us. This gets rid of the icky update(mask, mask) shenanigans.
> 
> The benefit of using FIELD_PREP_WM16 is that it does more checking of
> the input, hopefully catching errors. In practice, a shared definition
> makes code more readable than several different flavours of the same
> macro, and the shifted value helps as well.
> 
> I do not have the hardware that uses this particular driver, so it's
> compile-tested only as far as my own testing goes.
> 
> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>

Reviewed-by: Heiko Stuebner <heiko@...ech.de>