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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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be120397e7
Now that the common PSCI client code has been factored out to drivers/firmware, and made safe for 32-bit use, move the 32-bit ARM code over to it. This results in a moderate reduction of duplicated lines, and will prevent further duplication as the PSCI client code is updated for PSCI 1.0 and beyond. The two legacy platform users of the PSCI invocation code are updated to account for interface changes. In both cases the power state parameter (which is constant) is now generated using macros, so that the pack/unpack logic can be killed in preparation for PSCI 1.0 power state changes. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Rob Herring <robh@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Ashwin Chaugule <ashwin.chaugule@linaro.org> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/*
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* Copyright 2012 Calxeda, Inc.
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*
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* Based on arch/arm/plat-mxc/cpuidle.c: #v3.7
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* Copyright 2012 Freescale Semiconductor, Inc.
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* Copyright 2012 Linaro Ltd.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Maintainer: Rob Herring <rob.herring@calxeda.com>
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*/
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#include <linux/cpuidle.h>
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#include <linux/cpu_pm.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/platform_device.h>
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#include <linux/psci.h>
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#include <asm/cpuidle.h>
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#include <asm/suspend.h>
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#include <uapi/linux/psci.h>
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#define CALXEDA_IDLE_PARAM \
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((0 << PSCI_0_2_POWER_STATE_ID_SHIFT) | \
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(0 << PSCI_0_2_POWER_STATE_AFFL_SHIFT) | \
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(PSCI_POWER_STATE_TYPE_POWER_DOWN << PSCI_0_2_POWER_STATE_TYPE_SHIFT))
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static int calxeda_idle_finish(unsigned long val)
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{
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return psci_ops.cpu_suspend(CALXEDA_IDLE_PARAM, __pa(cpu_resume));
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}
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static int calxeda_pwrdown_idle(struct cpuidle_device *dev,
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struct cpuidle_driver *drv,
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int index)
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{
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cpu_pm_enter();
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cpu_suspend(0, calxeda_idle_finish);
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cpu_pm_exit();
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return index;
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}
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static struct cpuidle_driver calxeda_idle_driver = {
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.name = "calxeda_idle",
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.states = {
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ARM_CPUIDLE_WFI_STATE,
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{
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.name = "PG",
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.desc = "Power Gate",
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.exit_latency = 30,
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.power_usage = 50,
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.target_residency = 200,
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.enter = calxeda_pwrdown_idle,
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},
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},
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.state_count = 2,
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};
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static int calxeda_cpuidle_probe(struct platform_device *pdev)
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{
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return cpuidle_register(&calxeda_idle_driver, NULL);
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}
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static struct platform_driver calxeda_cpuidle_plat_driver = {
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.driver = {
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.name = "cpuidle-calxeda",
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},
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.probe = calxeda_cpuidle_probe,
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};
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builtin_platform_driver(calxeda_cpuidle_plat_driver);
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