cpufreq: mediatek: Add support for MT8176 and MT817x

The Mediatek MT8173 is just one of several SOCs from the same MT817x
family, including the 6-core (4-little/2-big) MT8176.

The mt8173-cpufreq driver supports all of these SOCs, however,
machines using them may use a different machine compatible.

Since this driver checks explicitly for the machine compatible
string, add support for the whole family.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 20 insertions, 1 deletions

diff --git a/drivers/cpufreq/mt8173-cpufreq.c b/drivers/cpufreq/mt8173-cpufreq.c
index 72bc1192bd30..fd1886faf33a 100644
--- a/drivers/cpufreq/mt8173-cpufreq.c
+++ b/drivers/cpufreq/mt8173-cpufreq.c
@@ -573,14 +573,33 @@ static struct platform_driver mt8173_cpufreq_platdrv = {
         .probe          = mt8173_cpufreq_probe,
 };
 
+/* List of machines supported by this driver */
+static const struct of_device_id mt8173_cpufreq_machines[] __initconst = {
+        { .compatible = "mediatek,mt817x", },
+        { .compatible = "mediatek,mt8173", },
+        { .compatible = "mediatek,mt8176", },
+
+        { }
+};
+
 static int __init mt8173_cpufreq_driver_init(void)
 {
+        struct device_node *np;
+        const struct of_device_id *match;
         struct platform_device *pdev;
         int err;
 
-        if (!of_machine_is_compatible("mediatek,mt8173"))
+        np = of_find_node_by_path("/");
+        if (!np)
                 return -ENODEV;
 
+        match = of_match_node(mt8173_cpufreq_machines, np);
+        of_node_put(np);
+        if (!match) {
+                pr_warn("Machine is not compatible with mt8173-cpufreq\n");
+                return -ENODEV;
+        }
+
         err = platform_driver_register(&mt8173_cpufreq_platdrv);
         if (err)
                 return err;