linux-kernel - [PATCH 0/2] arm64: remove generic ARM cpuidle support

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Message-Id: <20220529181329.2345722-1-michael@walle.cc>
Date:   Sun, 29 May 2022 20:13:27 +0200
From:   Michael Walle <michael@...le.cc>
To:     Catalin Marinas <catalin.marinas@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Will Deacon <will@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, Michael Walle <michael@...le.cc>
Subject: [PATCH 0/2] arm64: remove generic ARM cpuidle support

Playing with an own PSCI implementation, I've noticed that the cpuidle-arm
driver doesn't work on arm64. It doesn't probe because since commit
788961462f34 ("ARM: psci: cpuidle: Enable PSCI CPUidle driver") the
arm_cpuidle_init() can only return -EOPNOTSUPP, because the commit removed
the cpu_idle_init and cpu_suspend ops.

It left me puzzled for quite some time. It seems that the cpuidle-psci is
the preferred one and this has been the case for quite some time. The
mentioned commit first appeared in v5.4.

Remove the ARM64 support for the cpuidle-arm driver, which then let us
remove all the supporting arch code.

Michael Walle (2):
  cpuidle: cpuidle-arm: remove arm64 support
  arm64: cpuidle: remove generic cpuidle support

 arch/arm64/include/asm/cpu_ops.h |  9 ---------
 arch/arm64/include/asm/cpuidle.h | 15 ---------------
 arch/arm64/kernel/cpuidle.c      | 29 -----------------------------
 drivers/cpuidle/Kconfig.arm      |  3 ++-
 4 files changed, 2 insertions(+), 54 deletions(-)

-- 
2.30.2