From 638b266630db8d492255d340e18d46ba6ab1b057 Mon Sep 17 00:00:00 2001
From: Marc Singer <elf@buici.com>
Date: Tue, 16 May 2006 11:41:28 +0100
Subject: [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>
---
 arch/arm/mach-lh7a40x/clocks.c | 199 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 199 insertions(+)
 create mode 100644 arch/arm/mach-lh7a40x/clocks.c

(limited to 'arch/arm/mach-lh7a40x/clocks.c')

diff --git a/arch/arm/mach-lh7a40x/clocks.c b/arch/arm/mach-lh7a40x/clocks.c
new file mode 100644
index 00000000000..2291afe9f23
--- /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);
-- 
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