clk: qoriq: add cpufreq platform device

Add a platform device for qoirq-cpufreq driver for the compatible
clockgen blocks.
Reviewed-by: Yuantian Tang <andy.tang@nxp.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

drivers/clk/clk-qoriq.c

@@ -95,6 +95,7 @@ struct clockgen {
 };
 
 static struct clockgen clockgen;
+static bool add_cpufreq_dev __initdata;
 
 static void cg_out(struct clockgen *cg, u32 val, u32 __iomem *reg)
 {
@@ -1019,7 +1020,7 @@ static void __init create_muxes(struct clockgen *cg)
 	}
 }
 
-static void __init clockgen_init(struct device_node *np);
+static void __init _clockgen_init(struct device_node *np, bool legacy);
 
 /*
  * Legacy nodes may get probed before the parent clockgen node.
@@ -1030,7 +1031,7 @@ static void __init clockgen_init(struct device_node *np);
 static void __init legacy_init_clockgen(struct device_node *np)
 {
 	if (!clockgen.node)
-		clockgen_init(of_get_parent(np));
+		_clockgen_init(of_get_parent(np), true);
 }
 
 /* Legacy node */
@@ -1447,7 +1448,7 @@ static bool __init has_erratum_a4510(void)
 }
 #endif
 
-static void __init clockgen_init(struct device_node *np)
+static void __init _clockgen_init(struct device_node *np, bool legacy)
 {
 	int i, ret;
 	bool is_old_ls1021a = false;
@@ -1516,12 +1517,35 @@ static void __init clockgen_init(struct device_node *np)
 		       __func__, np, ret);
 	}
 
+	/* Don't create cpufreq device for legacy clockgen blocks */
+	add_cpufreq_dev = !legacy;
+
 	return;
 err:
 	iounmap(clockgen.regs);
 	clockgen.regs = NULL;
 }
 
+static void __init clockgen_init(struct device_node *np)
+{
+	_clockgen_init(np, false);
+}
+
+static int __init clockgen_cpufreq_init(void)
+{
+	struct platform_device *pdev;
+
+	if (add_cpufreq_dev) {
+		pdev = platform_device_register_simple("qoriq-cpufreq", -1,
+				NULL, 0);
+		if (IS_ERR(pdev))
+			pr_err("Couldn't register qoriq-cpufreq err=%ld\n",
+				PTR_ERR(pdev));
+	}
+	return 0;
+}
+device_initcall(clockgen_cpufreq_init);
+
 CLK_OF_DECLARE(qoriq_clockgen_1, "fsl,qoriq-clockgen-1.0", clockgen_init);
 CLK_OF_DECLARE(qoriq_clockgen_2, "fsl,qoriq-clockgen-2.0", clockgen_init);
 CLK_OF_DECLARE(qoriq_clockgen_b4420, "fsl,b4420-clockgen", clockgen_init);