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kernel: 6.1: backport Marvell Armada 8k AP807 cpufreq support

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Upstream a patch adding support for cpufreq on AP807-based SoC like the
CN913x was submitted. Include it in patches to ensure best performance
under load and lowest power consumption in idle.

Signed-off-by: Tobias Schramm <tobias@t-sys.eu>
This commit is contained in:
Tobias Schramm 2024-02-26 10:40:50 +01:00 committed by Christian Lamparter
parent 4f668091bf
commit 1ed01ef606
1 changed files with 64 additions and 0 deletions
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64
target/linux/mvebu/patches-6.1/000-cpufreq-armada-8k-add-ap807-support.patch Normal file
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@ -0,0 +1,64 @@
From 8eec6e740b564ec5e1da59ab7070b89aa23c9973 Mon Sep 17 00:00:00 2001
From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Date: Fri, 16 Jun 2023 12:41:30 +0100
Subject: [PATCH] cpufreq: armada-8k: add ap807 support
Add support for the Armada AP807 die to armada-8k. This uses a
different compatible for the CPU clock which needs to be added to
the cpufreq driver.
This commit takes a different approach to the WindRiver patch
"cpufreq: armada: enable ap807-cpu-clk" in that rather than calling
of_find_compatible_node() for each compatible, we use a table of
IDs instead.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/cpufreq/armada-8k-cpufreq.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/cpufreq/armada-8k-cpufreq.c b/drivers/cpufreq/armada-8k-cpufreq.c
index b0fc5e84f857..8afefdea4d80 100644
--- a/drivers/cpufreq/armada-8k-cpufreq.c
+++ b/drivers/cpufreq/armada-8k-cpufreq.c
@@ -21,6 +21,13 @@
#include <linux/pm_opp.h>
#include <linux/slab.h>
+static const struct of_device_id __maybe_unused armada_8k_cpufreq_of_match[] = {
+ { .compatible = "marvell,ap806-cpu-clock" },
+ { .compatible = "marvell,ap807-cpu-clock" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, armada_8k_cpufreq_of_match);
+
/*
* Setup the opps list with the divider for the max frequency, that
* will be filled at runtime.
@@ -127,7 +134,8 @@ static int __init armada_8k_cpufreq_init(void)
struct device_node *node;
struct cpumask cpus;
- node = of_find_compatible_node(NULL, NULL, "marvell,ap806-cpu-clock");
+ node = of_find_matching_node_and_match(NULL, armada_8k_cpufreq_of_match,
+ NULL);
if (!node || !of_device_is_available(node)) {
of_node_put(node);
return -ENODEV;
@@ -204,12 +212,6 @@ static void __exit armada_8k_cpufreq_exit(void)
}
module_exit(armada_8k_cpufreq_exit);
-static const struct of_device_id __maybe_unused armada_8k_cpufreq_of_match[] = {
- { .compatible = "marvell,ap806-cpu-clock" },
- { },
-};
-MODULE_DEVICE_TABLE(of, armada_8k_cpufreq_of_match);
-
MODULE_AUTHOR("Gregory Clement <gregory.clement@bootlin.com>");
MODULE_DESCRIPTION("Armada 8K cpufreq driver");
MODULE_LICENSE("GPL");
--
2.43.2