sh: clkfwk: Rework legacy CPG clock handling.

This moves out the old legacy CPG clocks to their own file, and converts
over the existing users. With these clocks going away and each CPU
dealing with them on their own, CPUs can gradually move over to the new
interface.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 60 insertions, 0 deletions

diff --git a/arch/sh/kernel/cpu/clock-cpg.c b/arch/sh/kernel/cpu/clock-cpg.c
new file mode 100644
index 00000000000..b4ca2004844
--- /dev/null
+++ b/arch/sh/kernel/cpu/clock-cpg.c
@@ -0,0 +1,60 @@
+#include <linux/clk.h>
+#include <linux/compiler.h>
+#include <asm/clock.h>
+
+static struct clk master_clk = {
+        .name           = "master_clk",
+        .flags          = CLK_ENABLE_ON_INIT,
+        .rate           = CONFIG_SH_PCLK_FREQ,
+};
+
+static struct clk peripheral_clk = {
+        .name           = "peripheral_clk",
+        .parent         = &master_clk,
+        .flags          = CLK_ENABLE_ON_INIT,
+};
+
+static struct clk bus_clk = {
+        .name           = "bus_clk",
+        .parent         = &master_clk,
+        .flags          = CLK_ENABLE_ON_INIT,
+};
+
+static struct clk cpu_clk = {
+        .name           = "cpu_clk",
+        .parent         = &master_clk,
+        .flags          = CLK_ENABLE_ON_INIT,
+};
+
+/*
+ * The ordering of these clocks matters, do not change it.
+ */
+static struct clk *onchip_clocks[] = {
+        &master_clk,
+        &peripheral_clk,
+        &bus_clk,
+        &cpu_clk,
+};
+
+int __init __deprecated cpg_clk_init(void)
+{
+        int i, ret = 0;
+
+        for (i = 0; i < ARRAY_SIZE(onchip_clocks); i++) {
+                struct clk *clk = onchip_clocks[i];
+                arch_init_clk_ops(&clk->ops, i);
+                if (clk->ops)
+                        ret |= clk_register(clk);
+        }
+
+        return ret;
+}
+
+/*
+ * Placeholder for compatability, until the lazy CPUs do this
+ * on their own.
+ */
+int __init __weak arch_clk_init(void)
+{
+        return cpg_clk_init();
+}