[POWERPC] bootwrapper: Add fsl_get_immr() and 8xx/pq2 clock functions.

fsl_get_immr() uses /soc/ranges to determine the immr.

mpc885_get_clock() transforms a crystal frequency into a system frequency
according to the PLL register settings.

pq2_get_clocks() does the same as the above for the PowerQUICC II,
except that it produces several different clocks.

The mpc8xx/pq2 set_clocks() functions modify common properties in
the device tree based on the given clock data.

The mpc885/pq2 fixup_clocks() functions call get_clocks(), and
pass the results to set_clocks().

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/arch/powerpc/boot/fsl-soc.c b/arch/powerpc/boot/fsl-soc.c
new file mode 100644
index 00000000000..b835ed69e1a
--- /dev/null
+++ b/arch/powerpc/boot/fsl-soc.c
@@ -0,0 +1,57 @@
+/*
+ * Freescale SOC support functions
+ *
+ * Author: Scott Wood <scottwood@freescale.com>
+ *
+ * Copyright (c) 2007 Freescale Semiconductor, 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.
+ */
+
+#include "ops.h"
+#include "types.h"
+#include "fsl-soc.h"
+#include "stdio.h"
+
+static u32 prop_buf[MAX_PROP_LEN / 4];
+
+u32 *fsl_get_immr(void)
+{
+	void *soc;
+	unsigned long ret = 0;
+
+	soc = find_node_by_devtype(NULL, "soc");
+	if (soc) {
+		int size;
+		u32 naddr;
+
+		size = getprop(soc, "#address-cells", prop_buf, MAX_PROP_LEN);
+		if (size == 4)
+			naddr = prop_buf[0];
+		else
+			naddr = 2;
+
+		if (naddr != 1 && naddr != 2)
+			goto err;
+
+		size = getprop(soc, "ranges", prop_buf, MAX_PROP_LEN);
+
+		if (size < 12)
+			goto err;
+		if (prop_buf[0] != 0)
+			goto err;
+		if (naddr == 2 && prop_buf[1] != 0)
+			goto err;
+
+		if (!dt_xlate_addr(soc, prop_buf + naddr, 8, &ret))
+			ret = 0;
+	}
+
+err:
+	if (!ret)
+		printf("fsl_get_immr: Failed to find immr base\r\n");
+
+	return (u32 *)ret;
+}