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authorScott Wood <scottwood@freescale.com>2007-08-27 14:46:38 -0400
committerKumar Gala <galak@kernel.crashing.org>2007-10-03 21:36:35 -0400
commitbbc6fac387f09e46a372e4aadbc935cba5a6b463 (patch)
tree930a30665c87ad0bd3c845ba892817f4a7b0ba19 /arch/powerpc/boot/fsl-soc.c
parent568091512d464b06f17b88bfd2bdc1ec98a697bd (diff)
[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>
Diffstat (limited to 'arch/powerpc/boot/fsl-soc.c')
-rw-r--r--arch/powerpc/boot/fsl-soc.c57
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 000000000000..b835ed69e1a1
--- /dev/null
+++ b/arch/powerpc/boot/fsl-soc.c
@@ -0,0 +1,57 @@
1/*
2 * Freescale SOC support functions
3 *
4 * Author: Scott Wood <scottwood@freescale.com>
5 *
6 * Copyright (c) 2007 Freescale Semiconductor, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published
10 * by the Free Software Foundation.
11 */
12
13#include "ops.h"
14#include "types.h"
15#include "fsl-soc.h"
16#include "stdio.h"
17
18static u32 prop_buf[MAX_PROP_LEN / 4];
19
20u32 *fsl_get_immr(void)
21{
22 void *soc;
23 unsigned long ret = 0;
24
25 soc = find_node_by_devtype(NULL, "soc");
26 if (soc) {
27 int size;
28 u32 naddr;
29
30 size = getprop(soc, "#address-cells", prop_buf, MAX_PROP_LEN);
31 if (size == 4)
32 naddr = prop_buf[0];
33 else
34 naddr = 2;
35
36 if (naddr != 1 && naddr != 2)
37 goto err;
38
39 size = getprop(soc, "ranges", prop_buf, MAX_PROP_LEN);
40
41 if (size < 12)
42 goto err;
43 if (prop_buf[0] != 0)
44 goto err;
45 if (naddr == 2 && prop_buf[1] != 0)
46 goto err;
47
48 if (!dt_xlate_addr(soc, prop_buf + naddr, 8, &ret))
49 ret = 0;
50 }
51
52err:
53 if (!ret)
54 printf("fsl_get_immr: Failed to find immr base\r\n");
55
56 return (u32 *)ret;
57}