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authorFabio Estevam <fabio.estevam@freescale.com>2013-04-17 13:09:56 +0000
committerStefano Babic <sbabic@denx.de>2013-04-25 21:15:49 +0200
commit492938a33484e8d1b14ed82d2545ecde08f6be30 (patch)
tree9a57a8bcab3d50026d7e6d1e4566c403326e8a80 /board/boundary
parent7a56f1791d84bb0fbd4e40bb6731915cc5ff6251 (diff)
nitrogen6x: Setup CCM_CCOSR register
CKO1 drives sgtl5000 codec clock on nitrogen boards and wandboard. Doing this setup in the bootloader will allow us to remove a lot of code in arch/arm/mach-imx/mach-imx6q.c from the mainline kernel. Also, according to Eric Nelson: "enabling the clock <in the bootloader> will remove squeal after an ungraceful reboot (watchdog) if hooked up to speakers." Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Diffstat (limited to 'board/boundary')
-rw-r--r--board/boundary/nitrogen6x/clocks.cfg11
1 files changed, 11 insertions, 0 deletions
diff --git a/board/boundary/nitrogen6x/clocks.cfg b/board/boundary/nitrogen6x/clocks.cfg
index e7d1f86cdb1..0a3b47b5d04 100644
--- a/board/boundary/nitrogen6x/clocks.cfg
+++ b/board/boundary/nitrogen6x/clocks.cfg
@@ -44,3 +44,14 @@ DATA 4, MX6_IOMUXC_GPR4, 0xF00000CF
/* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */
DATA 4, MX6_IOMUXC_GPR6, 0x007F007F
DATA 4, MX6_IOMUXC_GPR7, 0x007F007F
+
+/*
+ * Setup CCM_CCOSR register as follows:
+ *
+ * cko1_en = 1 --> CKO1 enabled
+ * cko1_div = 111 --> divide by 8
+ * cko1_sel = 1011 --> ahb_clk_root
+ *
+ * This sets CKO1 at ahb_clk_root/8 = 132/8 = 16.5 MHz
+ */
+DATA 4, CCM_CCOSR, 0x000000fb