diff options
author | Scott Wood <scottwood@freescale.com> | 2007-08-27 14:46:38 -0400 |
---|---|---|
committer | Kumar Gala <galak@kernel.crashing.org> | 2007-10-03 21:36:35 -0400 |
commit | bbc6fac387f09e46a372e4aadbc935cba5a6b463 (patch) | |
tree | 930a30665c87ad0bd3c845ba892817f4a7b0ba19 /arch/powerpc/boot/fsl-soc.c | |
parent | 568091512d464b06f17b88bfd2bdc1ec98a697bd (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.c | 57 |
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 | |||
18 | static u32 prop_buf[MAX_PROP_LEN / 4]; | ||
19 | |||
20 | u32 *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 | |||
52 | err: | ||
53 | if (!ret) | ||
54 | printf("fsl_get_immr: Failed to find immr base\r\n"); | ||
55 | |||
56 | return (u32 *)ret; | ||
57 | } | ||