1 files changed, 76 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/clkt2xxx_osc.c b/arch/arm/mach-omap2/clkt2xxx_osc.c
new file mode 100644
index 00000000..c3460928
--- /dev/null
+++ b/arch/arm/mach-omap2/clkt2xxx_osc.c
@@ -0,0 +1,76 @@
+/*
+ * OMAP2xxx osc_clk-specific clock code
+ *
+ * Copyright (C) 2005-2008 Texas Instruments, Inc.
+ * Copyright (C) 2004-2010 Nokia Corporation
+ *
+ * Contacts:
+ * Richard Woodruff <r-woodruff2@ti.com>
+ * Paul Walmsley
+ *
+ * Based on earlier work by Tuukka Tikkanen, Tony Lindgren,
+ * Gordon McNutt and RidgeRun, Inc.
+ *
+ * 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.
+ */
+#undef DEBUG
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <plat/clock.h>
+
+#include "clock.h"
+#include "clock2xxx.h"
+#include "prm2xxx_3xxx.h"
+#include "prm-regbits-24xx.h"
+
+/*
+ * XXX This does not actually enable the osc_ck, since the osc_ck must
+ * be running for this function to be called.  Instead, this function
+ * is used to disable an autoidle mode on the osc_ck.  The existing
+ * clk_enable/clk_disable()-based usecounting for osc_ck should be
+ * replaced with autoidle-based usecounting.
+ */
+static int omap2_enable_osc_ck(struct clk *clk)
+{
+	u32 pcc;
+
+	pcc = __raw_readl(prcm_clksrc_ctrl);
+
+	__raw_writel(pcc & ~OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl);
+
+	return 0;
+}
+
+/*
+ * XXX This does not actually disable the osc_ck, since doing so would
+ * immediately halt the system.  Instead, this function is used to
+ * enable an autoidle mode on the osc_ck.  The existing
+ * clk_enable/clk_disable()-based usecounting for osc_ck should be
+ * replaced with autoidle-based usecounting.
+ */
+static void omap2_disable_osc_ck(struct clk *clk)
+{
+	u32 pcc;
+
+	pcc = __raw_readl(prcm_clksrc_ctrl);
+
+	__raw_writel(pcc | OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl);
+}
+
+const struct clkops clkops_oscck = {
+	.enable		= omap2_enable_osc_ck,
+	.disable	= omap2_disable_osc_ck,
+};
+
+unsigned long omap2_osc_clk_recalc(struct clk *clk)
+{
+	return omap2xxx_get_apll_clkin() * omap2xxx_get_sysclkdiv();
+}
+