[PATCH 5/8] [ARM] U8500: adds basic clock framework

[srinidhi kasagar]

From: srinidhi kasagar <srinidhi.kasagar at stericsson.com>

This adds basic clock infrastructure for U8500
platform. Currently the lookup table is
populated with uartx and ssp clocks.

Signed-off-by: srinidhi kasagar <srinidhi.kasagar at stericsson.com>
Acked-by: Andrea Gallo <andrea.gallo at stericsson.com>
---
 arch/arm/mach-ux500/clock.c |   95 +++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 95 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-ux500/clock.c

diff --git a/arch/arm/mach-ux500/clock.c b/arch/arm/mach-ux500/clock.c
new file mode 100644
index 0000000..20b6ebb
--- /dev/null
+++ b/arch/arm/mach-ux500/clock.c
@@ -0,0 +1,95 @@
+/*
+ *  Copyright (C) 2009 ST-Ericsson
+ * 	heavily based on realview platform
+ *
+ * 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/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/mutex.h>
+
+#include <asm/clkdev.h>
+
+/* currently the clk structure
+ * just supports rate. This would
+ * be extended as and when new devices are
+ * added - TODO
+ */
+struct clk {
+	unsigned long		rate;
+};
+
+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);
+
+long clk_round_rate(struct clk *clk, unsigned long rate)
+{
+	/*TODO*/
+	return rate;
+}
+EXPORT_SYMBOL(clk_round_rate);
+
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+	clk->rate = rate;
+	return 0;
+}
+EXPORT_SYMBOL(clk_set_rate);
+
+/* ssp clock */
+static struct clk ssp_clk = {
+	.rate = 48000000,
+};
+
+/* fixed clock */
+static struct clk f38_clk = {
+	.rate = 38400000,
+};
+
+static struct clk_lookup lookups[] = {
+	{
+		/* UART0 */
+		.dev_id		= "uart0",
+		.clk		= &f38_clk,
+	}, {	/* UART1 */
+		.dev_id		= "uart1",
+		.clk		= &f38_clk,
+	}, {	/* UART2 */
+		.dev_id		= "uart2",
+		.clk		= &f38_clk,
+	}, {	/* SSP */
+		.dev_id		= "pl022",
+		.clk		= &ssp_clk,
+	}
+};
+
+static int __init clk_init(void)
+{
+	int i;
+
+	/* register the clock lookups */
+	for (i = 0; i < ARRAY_SIZE(lookups); i++)
+		clkdev_add(&lookups[i]);
+	return 0;
+}
+arch_initcall(clk_init);
-- 
1.6.3.GIT