ACPI: APD: Add a fmw property clk-name

Add a new device property to fetch clk-name from firmware.
Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
Reviewed-by: Mario Limonciello <Mario.Limonciello@amd.com>
Link: https://lore.kernel.org/r/20211212180527.1641362-4-AjitKumar.Pandey@amd.comSigned-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/acpi/acpi_apd.c

@@ -87,6 +87,16 @@ static int fch_misc_setup(struct apd_private_data *pdata)
 	if (ret < 0)
 		return -ENOENT;
 
+	if (!acpi_dev_get_property(adev, "clk-name", ACPI_TYPE_STRING, &obj)) {
+		clk_data->name = devm_kzalloc(&adev->dev, obj->string.length,
+					      GFP_KERNEL);
+
+		strcpy(clk_data->name, obj->string.pointer);
+	} else {
+		/* Set default name to mclk if entry missing in firmware */
+		clk_data->name = "mclk";
+	}
+
 	list_for_each_entry(rentry, &resource_list, node) {
 		clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
 					      resource_size(rentry->res));

include/linux/platform_data/clk-fch.h

@@ -12,6 +12,7 @@
 
 struct fch_clk_data {
 	void __iomem *base;
+	char *name;
 };
 
 #endif /* __CLK_FCH_H */