1 files changed, 76 insertions, 0 deletions
diff --git a/target/linux/adm8668/files-3.18/arch/mips/adm8668/clock.c b/target/linux/adm8668/files-3.18/arch/mips/adm8668/clock.c
new file mode 100644
index 0000000..1e010fc
--- /dev/null
+++ b/target/linux/adm8668/files-3.18/arch/mips/adm8668/clock.c
@@ -0,0 +1,76 @@
+/*
+ * ADM8668 minimal clock support
+ *
+ * Copyright (C) 2012, Florian Fainelli <florian@openwrt.org>
+ *
+ * Licensed under the terms of the GPLv2
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+
+#include <adm8668.h>
+
+struct clk {
+	unsigned long rate;
+};
+
+static struct clk uart_clk = {
+	.rate	= 62500000,
+};
+
+static struct clk sys_clk;
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+	const char *lookup = id;
+
+	if (dev)
+		lookup = dev_name(dev);
+
+	if (!strcmp(lookup, "apb:uart0"))
+		return &uart_clk;
+	if (!strcmp(lookup, "sys"))
+		return &sys_clk;
+
+	return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(clk_get);
+
+int clk_enable(struct clk *clk)
+{
+	return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+	return clk->rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_put);
+
+void __init adm8668_init_clocks(void)
+{
+	u32 adj;
+
+	/* adjustable clock selection
+	 * CR3 bit 14~11, 0000 -> 175MHz, 0001 -> 180MHz, etc...
+	 */
+	adj = (ADM8668_CONFIG_REG(ADM8668_CR3) >> 11) & 0xf;
+	sys_clk.rate = 175000000 + (adj * 5000000);
+
+	pr_info("ADM8668 CPU clock: %lu MHz\n", sys_clk.rate / 1000000);
+}