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Diffstat (limited to 'arch/sh/kernel/cpu/clock-cpg.c')
-rw-r--r--arch/sh/kernel/cpu/clock-cpg.c78
1 files changed, 78 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 000000000..5b75a384c
--- /dev/null
+++ b/arch/sh/kernel/cpu/clock-cpg.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0
+#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);
+
+ 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();
+}