[ramips] move files to files-3.7

[openwrt.git] / target / linux / ramips / files-3.7 / arch / mips / ralink / rt288x / clock.c

diff --git a/target/linux/ramips/files-3.7/arch/mips/ralink/rt288x/clock.c b/target/linux/ramips/files-3.7/arch/mips/ralink/rt288x/clock.c
new file mode 100644 (file)
index 0000000..36d754d
--- /dev/null
+++ b/target/linux/ramips/files-3.7/arch/mips/ralink/rt288x/clock.c
@@ -0,0 +1,99 @@
+/*
+ *  Ralink RT288X 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/rt288x.h>
+#include <asm/mach-ralink/rt288x_regs.h>
+#include "common.h"
+
+struct clk {
+       unsigned long rate;
+};
+
+static struct clk rt288x_cpu_clk;
+static struct clk rt288x_sys_clk;
+static struct clk rt288x_wdt_clk;
+static struct clk rt288x_uart_clk;
+
+void __init rt288x_clocks_init(void)
+{
+       u32     t;
+
+       t = rt288x_sysc_rr(SYSC_REG_SYSTEM_CONFIG);
+       t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK);
+
+       switch (t) {
+       case SYSTEM_CONFIG_CPUCLK_250:
+               rt288x_cpu_clk.rate = 250000000;
+               break;
+       case SYSTEM_CONFIG_CPUCLK_266:
+               rt288x_cpu_clk.rate = 266666667;
+               break;
+       case SYSTEM_CONFIG_CPUCLK_280:
+               rt288x_cpu_clk.rate = 280000000;
+               break;
+       case SYSTEM_CONFIG_CPUCLK_300:
+               rt288x_cpu_clk.rate = 300000000;
+               break;
+       }
+
+       rt288x_sys_clk.rate = rt288x_cpu_clk.rate / 2;
+       rt288x_uart_clk.rate = rt288x_sys_clk.rate;
+       rt288x_wdt_clk.rate = rt288x_sys_clk.rate;
+}
+
+/*
+ * Linux clock API
+ */
+struct clk *clk_get(struct device *dev, const char *id)
+{
+       if (!strcmp(id, "sys"))
+               return &rt288x_sys_clk;
+
+       if (!strcmp(id, "cpu"))
+               return &rt288x_cpu_clk;
+
+       if (!strcmp(id, "wdt"))
+               return &rt288x_wdt_clk;
+
+       if (!strcmp(id, "uart"))
+               return &rt288x_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);