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authorTimur Tabi <timur@freescale.com>2011-06-08 12:10:49 -0500
committerKumar Gala <galak@kernel.crashing.org>2011-06-09 15:53:38 -0500
commit29b83d983392fcb5378b915ee2112bb48b8c05be (patch)
tree809db6af1e5b6289b2685a381455875e507d49ec /board/freescale/p1022ds
parent9571865e0d32b1bcf8a6625497d1cd5d4bbad354 (diff)
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powerpc/p1022ds: set the clock-frequency prop only if the clock is enabled
The clock-frequency property in an audio codec's device tree node is set to the input clock frequency for that codec. On the Freescale P1022DS board, the input clock is enabled only if the hwconfig 'audclk' option is set. Therefore, the property should only be set in the device tree if the clock is actually enabled. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'board/freescale/p1022ds')
-rw-r--r--board/freescale/p1022ds/p1022ds.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/board/freescale/p1022ds/p1022ds.c b/board/freescale/p1022ds/p1022ds.c
index 8ef627f..456d9b0 100644
--- a/board/freescale/p1022ds/p1022ds.c
+++ b/board/freescale/p1022ds/p1022ds.c
@@ -308,7 +308,8 @@ int board_eth_init(bd_t *bis)
* ft_codec_setup - fix up the clock-frequency property of the codec node
*
* Update the clock-frequency property based on the value of the 'audclk'
- * hwconfig option. If audclk is not specified, then default to 12.288MHz.
+ * hwconfig option. If audclk is not specified, then don't write anything
+ * to the device tree, because it means that the codec clock is disabled.
*/
static void ft_codec_setup(void *blob, const char *compatible)
{
@@ -317,12 +318,15 @@ static void ft_codec_setup(void *blob, const char *compatible)
u32 freq;
audclk = hwconfig_arg("audclk", &arglen);
- if (audclk && (strncmp(audclk, "11", 2) == 0))
- freq = 11289600;
- else
- freq = 12288000;
+ if (audclk) {
+ if (strncmp(audclk, "11", 2) == 0)
+ freq = 11289600;
+ else
+ freq = 12288000;
- do_fixup_by_compat_u32(blob, compatible, "clock-frequency", freq, 1);
+ do_fixup_by_compat_u32(blob, compatible, "clock-frequency",
+ freq, 1);
+ }
}
void ft_board_setup(void *blob, bd_t *bd)