From 23fa18eaa71266feff7ba8d83022d9e1cc83c65a Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:42:03 +0000
Subject: [PATCH] disable pwm7
---
kernel/arch/arm64/kernel/cpuidle.c | 65 ++++++++++++++++++++++++++------
1 files changed, 52 insertions(+), 13 deletions(-)
diff --git a/kernel/arch/arm64/kernel/cpuidle.c b/kernel/arch/arm64/kernel/cpuidle.c
index e774077..d4ff9ae 100644
--- a/kernel/arch/arm64/kernel/cpuidle.c
+++ b/kernel/arch/arm64/kernel/cpuidle.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* ARM64 CPU idle arch support
*
* Copyright (C) 2014 ARM Ltd.
* Author: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/acpi.h>
@@ -14,17 +11,18 @@
#include <linux/cpu_pm.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/psci.h>
#include <asm/cpuidle.h>
#include <asm/cpu_ops.h>
int arm_cpuidle_init(unsigned int cpu)
{
+ const struct cpu_operations *ops = get_cpu_ops(cpu);
int ret = -EOPNOTSUPP;
- if (cpu_ops[cpu] && cpu_ops[cpu]->cpu_suspend &&
- cpu_ops[cpu]->cpu_init_idle)
- ret = cpu_ops[cpu]->cpu_init_idle(cpu);
+ if (ops && ops->cpu_suspend && ops->cpu_init_idle)
+ ret = ops->cpu_init_idle(cpu);
return ret;
}
@@ -39,10 +37,10 @@
int arm_cpuidle_suspend(int index)
{
int cpu = smp_processor_id();
+ const struct cpu_operations *ops = get_cpu_ops(cpu);
- return cpu_ops[cpu]->cpu_suspend(index);
+ return ops->cpu_suspend(index);
}
-EXPORT_SYMBOL_GPL(arm_cpuidle_suspend);
#ifdef CONFIG_ACPI
@@ -50,17 +48,58 @@
#define ARM64_LPI_IS_RETENTION_STATE(arch_flags) (!(arch_flags))
+static int psci_acpi_cpu_init_idle(unsigned int cpu)
+{
+ int i, count;
+ struct acpi_lpi_state *lpi;
+ struct acpi_processor *pr = per_cpu(processors, cpu);
+
+ if (unlikely(!pr || !pr->flags.has_lpi))
+ return -EINVAL;
+
+ /*
+ * If the PSCI cpu_suspend function hook has not been initialized
+ * idle states must not be enabled, so bail out
+ */
+ if (!psci_ops.cpu_suspend)
+ return -EOPNOTSUPP;
+
+ count = pr->power.count - 1;
+ if (count <= 0)
+ return -ENODEV;
+
+ for (i = 0; i < count; i++) {
+ u32 state;
+
+ lpi = &pr->power.lpi_states[i + 1];
+ /*
+ * Only bits[31:0] represent a PSCI power_state while
+ * bits[63:32] must be 0x0 as per ARM ACPI FFH Specification
+ */
+ state = lpi->address;
+ if (!psci_power_state_is_valid(state)) {
+ pr_warn("Invalid PSCI power state %#x\n", state);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
int acpi_processor_ffh_lpi_probe(unsigned int cpu)
{
- return arm_cpuidle_init(cpu);
+ return psci_acpi_cpu_init_idle(cpu);
}
int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi)
{
+ u32 state = lpi->address;
+
if (ARM64_LPI_IS_RETENTION_STATE(lpi->arch_flags))
- return CPU_PM_CPU_IDLE_ENTER_RETENTION(arm_cpuidle_suspend,
- lpi->index);
+ return CPU_PM_CPU_IDLE_ENTER_RETENTION_PARAM(psci_cpu_suspend_enter,
+ lpi->index, state);
else
- return CPU_PM_CPU_IDLE_ENTER(arm_cpuidle_suspend, lpi->index);
+ return CPU_PM_CPU_IDLE_ENTER_PARAM(psci_cpu_suspend_enter,
+ lpi->index, state);
}
#endif
--
Gitblit v1.6.2