linux-kernel - [PATCH v2 01/18] genpd: Create a new subsystem directory to host genpd providers

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Message-Id: <20230711141956.751529-1-ulf.hansson@linaro.org>
Date:   Tue, 11 Jul 2023 16:19:56 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Michal Simek <michal.simek@....com>,
        Nishanth Menon <nm@...com>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Tero Kristo <kristo@...nel.org>,
        Tony Lindgren <tony@...mide.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Walker Chen <walker.chen@...rfivetech.com>,
        Conor Dooley <conor@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Hector Martin <marcan@...can.st>,
        Sven Peter <sven@...npeter.dev>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Andreas Farber <afaerber@...e.de>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 01/18] genpd: Create a new subsystem directory to host genpd providers

There are currently ~60 users of the genpd provider interface, which
implementations are sprinkled across various subsystems. To simplify with
maintenance let's create a new subsystem (drivers/genpd) and start moving
the providers in there.

My intention is also to host a git tree to collect and to get the patches
tested/integrated through the linux-next tree. Ideally this should release
some of the burden on the soc maintainers.

Note that, I will of course require acks/reviews from the current platform
maintainers, hence the MAINTAINERS file needs to be updated accordingly for
each genpd provider that is moved into the new genpd subsystem.

Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
---
 MAINTAINERS            | 7 +++++++
 drivers/Makefile       | 1 +
 drivers/genpd/Makefile | 1 +
 3 files changed, 9 insertions(+)
 create mode 100644 drivers/genpd/Makefile

diff --git a/MAINTAINERS b/MAINTAINERS
index 3be1bdfe8ecc..38eebcc97aa2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8665,6 +8665,13 @@ F:	Documentation/devicetree/bindings/power/power?domain*
 F:	drivers/base/power/domain*.c
 F:	include/linux/pm_domain.h
 
+GENERIC PM DOMAIN PROVIDERS
+M:	Ulf Hansson <ulf.hansson@...aro.org>
+L:	linux-pm@...r.kernel.org
+S:	Supported
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm.git
+F:	drivers/genpd/
+
 GENERIC RESISTIVE TOUCHSCREEN ADC DRIVER
 M:	Eugen Hristev <eugen.hristev@...rochip.com>
 L:	linux-input@...r.kernel.org
diff --git a/drivers/Makefile b/drivers/Makefile
index 7241d80a7b29..cffac5b8c092 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_DMADEVICES)	+= dma/
 
 # SOC specific infrastructure drivers.
 obj-y				+= soc/
+obj-$(CONFIG_PM_GENERIC_DOMAINS)	+= genpd/
 
 obj-y				+= virtio/
 obj-$(CONFIG_VDPA)		+= vdpa/
diff --git a/drivers/genpd/Makefile b/drivers/genpd/Makefile
new file mode 100644
index 000000000000..a4e40e534e6a
--- /dev/null
+++ b/drivers/genpd/Makefile
@@ -0,0 +1 @@
+# SPDX-License-Identifier: GPL-2.0-only
-- 
2.34.1