Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / sh / kernel / cpu / clock-cpg.c

diff --git a/kernel/arch/sh/kernel/cpu/clock-cpg.c b/kernel/arch/sh/kernel/cpu/clock-cpg.c
new file mode 100644 (file)
index 0000000..8525a67
--- /dev/null
+++ b/kernel/arch/sh/kernel/cpu/clock-cpg.c
@@ -0,0 +1,78 @@
+#include <linux/clk.h>
+#include <linux/compiler.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/clkdev.h>
+#include <asm/clock.h>
+
+static struct clk master_clk = {
+       .flags          = CLK_ENABLE_ON_INIT,
+       .rate           = CONFIG_SH_PCLK_FREQ,
+};
+
+static struct clk peripheral_clk = {
+       .parent         = &master_clk,
+       .flags          = CLK_ENABLE_ON_INIT,
+};
+
+static struct clk bus_clk = {
+       .parent         = &master_clk,
+       .flags          = CLK_ENABLE_ON_INIT,
+};
+
+static struct clk 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,
+};
+
+static struct clk_lookup lookups[] = {
+       /* main clocks */
+       CLKDEV_CON_ID("master_clk", &master_clk),
+       CLKDEV_CON_ID("peripheral_clk", &peripheral_clk),
+       CLKDEV_CON_ID("bus_clk", &bus_clk),
+       CLKDEV_CON_ID("cpu_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);
+       }
+
+       clkdev_add_table(lookups, ARRAY_SIZE(lookups));
+
+       clk_add_alias("fck", "sh-tmu-sh3.0", "peripheral_clk", NULL);
+       clk_add_alias("fck", "sh-tmu.0", "peripheral_clk", NULL);
+       clk_add_alias("fck", "sh-tmu.1", "peripheral_clk", NULL);
+       clk_add_alias("fck", "sh-tmu.2", "peripheral_clk", NULL);
+       clk_add_alias("fck", "sh-mtu2", "peripheral_clk", NULL);
+       clk_add_alias("fck", "sh-cmt-16.0", "peripheral_clk", NULL);
+       clk_add_alias("fck", "sh-cmt-32.0", "peripheral_clk", NULL);
+       clk_add_alias("sci_ick", NULL, "peripheral_clk", NULL);
+
+       return ret;
+}
+
+/*
+ * Placeholder for compatibility, until the lazy CPUs do this
+ * on their own.
+ */
+int __init __weak arch_clk_init(void)
+{
+       return cpg_clk_init();
+}