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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>
This commit is contained in:
Fabio Estevam 2013-04-17 13:09:56 +00:00 committed by Stefano Babic
parent 7a56f1791d
commit 492938a334
2 changed files with 12 additions and 0 deletions
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1
arch/arm/include/asm/arch-mx6/crm_regs.h
View File

@ -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

11
board/boundary/nitrogen6x/clocks.cfg
View File

@ -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