linux-kernel - [PATCH 3/3] cpufreq: amd-pstate: Add a module device table

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Date:   Fri, 25 Mar 2022 00:42:28 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     Huang Rui <ray.huang@....com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>
CC:     "open list:AMD PSTATE DRIVER" <linux-pm@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Mario Limonciello <mario.limonciello@....com>
Subject: [PATCH 3/3] cpufreq: amd-pstate: Add a module device table

`amd-pstate` currently only loads automatically if compiled into the
kernel.  To improve the usability, add a module device table that
will load when AMD CPUs that support CPPC are detected.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 drivers/cpufreq/amd-pstate.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 31a04e818195..44490292fa72 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -644,6 +644,12 @@ static void __exit amd_pstate_exit(void)
 	amd_pstate_enable(false);
 }
 
+static const struct x86_cpu_id __maybe_unused amd_pstate_ids[] = {
+	X86_MATCH_VENDOR_FEATURE(AMD, X86_FEATURE_CPPC, NULL),
+	{}
+};
+MODULE_DEVICE_TABLE(x86cpu, amd_pstate_ids);
+
 module_init(amd_pstate_init);
 module_exit(amd_pstate_exit);
 
-- 
2.34.1