From 29b83d983392fcb5378b915ee2112bb48b8c05be Mon Sep 17 00:00:00 2001
From: Timur Tabi <timur@freescale.com>
Date: Wed, 8 Jun 2011 12:10:49 -0500
Subject: [PATCH] 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>
---
board/freescale/p1022ds/p1022ds.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/board/freescale/p1022ds/p1022ds.c b/board/freescale/p1022ds/p1022ds.c
index 8ef627fc7b4..456d9b0e342 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)
--
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