[ARM] 3401/1: lpd7a40x: platform update
Patch from Marc Singer
Updates to the lpd7a40x_platform files. Includes support for new
architecture, lpd7a400.
Signed-off-by: Marc Singer <elf@buici.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-lh7a40x/clocks.c b/arch/arm/mach-lh7a40x/clocks.c
new file mode 100644
index 0000000..2291afe9
--- /dev/null
+++ b/arch/arm/mach-lh7a40x/clocks.c
@@ -0,0 +1,199 @@
+/* arch/arm/mach-lh7a40x/clocks.c
+ *
+ * Copyright (C) 2004 Marc Singer
+ *
+ * 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/config.h>
+#include <linux/cpufreq.h>
+#include <asm/hardware.h>
+#include <asm/arch/clocks.h>
+#include <linux/err.h>
+
+struct module;
+struct icst525_params;
+
+struct clk {
+ struct list_head node;
+ unsigned long rate;
+ struct module *owner;
+ const char *name;
+// void *data;
+// const struct icst525_params *params;
+// void (*setvco)(struct clk *, struct icst525_vco vco);
+};
+
+int clk_register(struct clk *clk);
+void clk_unregister(struct clk *clk);
+
+/* ----- */
+
+#define MAINDIV1(c) (((c) >> 7) & 0x0f)
+#define MAINDIV2(c) (((c) >> 11) & 0x1f)
+#define PS(c) (((c) >> 18) & 0x03)
+#define PREDIV(c) (((c) >> 2) & 0x1f)
+#define HCLKDIV(c) (((c) >> 0) & 0x02)
+#define PCLKDIV(c) (((c) >> 16) & 0x03)
+
+unsigned int cpufreq_get (unsigned int cpu) /* in kHz */
+{
+ return fclkfreq_get ()/1000;
+}
+EXPORT_SYMBOL(cpufreq_get);
+
+unsigned int fclkfreq_get (void)
+{
+ unsigned int clkset = CSC_CLKSET;
+ unsigned int gclk
+ = XTAL_IN
+ / (1 << PS(clkset))
+ * (MAINDIV1(clkset) + 2)
+ / (PREDIV(clkset) + 2)
+ * (MAINDIV2(clkset) + 2)
+ ;
+ return gclk;
+}
+
+unsigned int hclkfreq_get (void)
+{
+ unsigned int clkset = CSC_CLKSET;
+ unsigned int hclk = fclkfreq_get () / (HCLKDIV(clkset) + 1);
+
+ return hclk;
+}
+
+unsigned int pclkfreq_get (void)
+{
+ unsigned int clkset = CSC_CLKSET;
+ int pclkdiv = PCLKDIV(clkset);
+ unsigned int pclk;
+ if (pclkdiv == 0x3)
+ pclkdiv = 0x2;
+ pclk = hclkfreq_get () / (1 << pclkdiv);
+
+ return pclk;
+}
+
+/* ----- */
+
+static LIST_HEAD(clocks);
+static DECLARE_MUTEX(clocks_sem);
+
+struct clk *clk_get (struct device *dev, const char *id)
+{
+ struct clk *p;
+ struct clk *clk = ERR_PTR(-ENOENT);
+
+ down (&clocks_sem);
+ list_for_each_entry (p, &clocks, node) {
+ if (strcmp (id, p->name) == 0
+ && try_module_get(p->owner)) {
+ clk = p;
+ break;
+ }
+ }
+ up (&clocks_sem);
+
+ return clk;
+}
+EXPORT_SYMBOL(clk_get);
+
+void clk_put (struct clk *clk)
+{
+ module_put(clk->owner);
+}
+EXPORT_SYMBOL(clk_put);
+
+int clk_enable (struct clk *clk)
+{
+ return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable (struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+int clk_use (struct clk *clk)
+{
+ return 0;
+}
+EXPORT_SYMBOL(clk_use);
+
+void clk_unuse (struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_unuse);
+
+unsigned long clk_get_rate (struct clk *clk)
+{
+ return clk->rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+long clk_round_rate (struct clk *clk, unsigned long rate)
+{
+ return rate;
+}
+EXPORT_SYMBOL(clk_round_rate);
+
+int clk_set_rate (struct clk *clk, unsigned long rate)
+{
+ int ret = -EIO;
+ return ret;
+}
+EXPORT_SYMBOL(clk_set_rate);
+
+#if 0
+/*
+ * These are fixed clocks.
+ */
+static struct clk kmi_clk = {
+ .name = "KMIREFCLK",
+ .rate = 24000000,
+};
+
+static struct clk uart_clk = {
+ .name = "UARTCLK",
+ .rate = 24000000,
+};
+
+static struct clk mmci_clk = {
+ .name = "MCLK",
+ .rate = 33000000,
+};
+#endif
+
+static struct clk clcd_clk = {
+ .name = "CLCDCLK",
+ .rate = 0,
+};
+
+int clk_register (struct clk *clk)
+{
+ down (&clocks_sem);
+ list_add (&clk->node, &clocks);
+ up (&clocks_sem);
+ return 0;
+}
+EXPORT_SYMBOL(clk_register);
+
+void clk_unregister (struct clk *clk)
+{
+ down (&clocks_sem);
+ list_del (&clk->node);
+ up (&clocks_sem);
+}
+EXPORT_SYMBOL(clk_unregister);
+
+static int __init clk_init (void)
+{
+ clk_register(&clcd_clk);
+ return 0;
+}
+arch_initcall(clk_init);