diff options
| author | Fabio Estevam <fabio.estevam@freescale.com> | 2013-04-17 13:09:56 +0000 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2013-04-25 21:15:49 +0200 |
| commit | 492938a33484e8d1b14ed82d2545ecde08f6be30 (patch) | |
| tree | 9a57a8bcab3d50026d7e6d1e4566c403326e8a80 | |
| parent | 7a56f1791d84bb0fbd4e40bb6731915cc5ff6251 (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>
| -rw-r--r-- | arch/arm/include/asm/arch-mx6/crm_regs.h | 1 | ||||
| -rw-r--r-- | board/boundary/nitrogen6x/clocks.cfg | 11 |
2 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-mx6/crm_regs.h b/arch/arm/include/asm/arch-mx6/crm_regs.h index f16bd92abc..aa9747ce33 100644 --- a/arch/arm/include/asm/arch-mx6/crm_regs.h +++ b/arch/arm/include/asm/arch-mx6/crm_regs.h @@ -20,6 +20,7 @@ #ifndef __ARCH_ARM_MACH_MX6_CCM_REGS_H__ #define __ARCH_ARM_MACH_MX6_CCM_REGS_H__ +#define CCM_CCOSR 0x020c4060 #define CCM_CCGR0 0x020C4068 #define CCM_CCGR1 0x020C406c #define CCM_CCGR2 0x020C4070 diff --git a/board/boundary/nitrogen6x/clocks.cfg b/board/boundary/nitrogen6x/clocks.cfg index e7d1f86cdb..0a3b47b5d0 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 |