1 files changed, 133 insertions, 0 deletions
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt305x/clock.c b/target/linux/ramips/files/arch/mips/ralink/rt305x/clock.c
new file mode 100644
index 0000000..c46a174
--- /dev/null
+++ b/target/linux/ramips/files/arch/mips/ralink/rt305x/clock.c
@@ -0,0 +1,133 @@
+/*
+ *  Ralink RT305X clock API
+ *
+ *  Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+
+#include <asm/mach-ralink/common.h>
+#include <asm/mach-ralink/rt305x.h>
+#include <asm/mach-ralink/rt305x_regs.h>
+#include "common.h"
+
+struct clk {
+	unsigned long rate;
+};
+
+static struct clk rt305x_cpu_clk;
+static struct clk rt305x_sys_clk;
+static struct clk rt305x_wdt_clk;
+static struct clk rt305x_uart_clk;
+
+void __init rt305x_clocks_init(void)
+{
+	u32	t;
+
+	t = rt305x_sysc_rr(SYSC_REG_SYSTEM_CONFIG);
+
+	if (soc_is_rt305x() || soc_is_rt3350()) {
+		t = (t >> RT305X_SYSCFG_CPUCLK_SHIFT) &
+		     RT305X_SYSCFG_CPUCLK_MASK;
+		switch (t) {
+		case RT305X_SYSCFG_CPUCLK_LOW:
+			rt305x_cpu_clk.rate = 320000000;
+			break;
+		case RT305X_SYSCFG_CPUCLK_HIGH:
+			rt305x_cpu_clk.rate = 384000000;
+			break;
+		}
+		rt305x_sys_clk.rate = rt305x_cpu_clk.rate / 3;
+		rt305x_uart_clk.rate = rt305x_sys_clk.rate;
+		rt305x_wdt_clk.rate = rt305x_sys_clk.rate;
+	} else if (soc_is_rt3352()) {
+		t = (t >> RT3352_SYSCFG0_CPUCLK_SHIFT) &
+		     RT3352_SYSCFG0_CPUCLK_MASK;
+		switch (t) {
+		case RT3352_SYSCFG0_CPUCLK_LOW:
+			rt305x_cpu_clk.rate = 384000000;
+			break;
+		case RT3352_SYSCFG0_CPUCLK_HIGH:
+			rt305x_cpu_clk.rate = 400000000;
+			break;
+		}
+		rt305x_sys_clk.rate = rt305x_cpu_clk.rate / 3;
+		rt305x_uart_clk.rate = 40000000;
+		rt305x_wdt_clk.rate = rt305x_sys_clk.rate;
+	} else if (soc_is_rt5350()) {
+		t = (t >> RT5350_SYSCFG0_CPUCLK_SHIFT) &
+		     RT5350_SYSCFG0_CPUCLK_MASK;
+		switch (t) {
+		case RT5350_SYSCFG0_CPUCLK_360:
+			rt305x_cpu_clk.rate = 360000000;
+			rt305x_sys_clk.rate = rt305x_cpu_clk.rate / 3;
+			break;
+		case RT5350_SYSCFG0_CPUCLK_320:
+			rt305x_cpu_clk.rate = 320000000;
+			rt305x_sys_clk.rate = rt305x_cpu_clk.rate / 4;
+			break;
+		case RT5350_SYSCFG0_CPUCLK_300:
+			rt305x_cpu_clk.rate = 300000000;
+			rt305x_sys_clk.rate = rt305x_cpu_clk.rate / 3;
+			break;
+		default:
+			BUG();
+		}
+		rt305x_uart_clk.rate = 40000000;
+		rt305x_wdt_clk.rate = rt305x_sys_clk.rate;
+	} else {
+		BUG();
+	}
+
+}
+
+/*
+ * Linux clock API
+ */
+struct clk *clk_get(struct device *dev, const char *id)
+{
+	if (!strcmp(id, "sys"))
+		return &rt305x_sys_clk;
+
+	if (!strcmp(id, "cpu"))
+		return &rt305x_cpu_clk;
+
+	if (!strcmp(id, "wdt"))
+		return &rt305x_wdt_clk;
+
+	if (!strcmp(id, "uart"))
+		return &rt305x_uart_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);