Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-30 16:39:35 +00:00
Code Issues Projects Releases Packages Wiki Activity

mx5: lowlevel_init.S: Fix PLL settings for mx53

Browse source 
Currently PLL2 is not explicitely configured for mx53 and it runs at 333MHz.

Since PLL2 is the parent clock for DDR2, IPU, VPU, we should set it at 400MHz
instead.

Without doing so, it is not possible to use a 2.6.35 FSL kernel and display HDMI
at 1080p because the IPU clock cannot reach the requested frequency.

Set PLL2 to 400MHz, so that 1080p can be played and the DDR2 can run at its
maximum frequency.

Also, setup the other PLL's as done in FSL U-boot and re-arrange the code a little
bit to allow easier comparison with the original clock setup from FSL U-boot.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
This commit is contained in:
Fabio Estevam 2012-10-15 05:37:16 +00:00 committed by Stefano Babic
parent 758c344945
commit 782b028841
2 changed files with 67 additions and 33 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

96
arch/arm/cpu/armv7/mx5/lowlevel_init.S
View file

@ -296,20 +296,66 @@ setup_pll_func:
setup_pll PLL1_BASE_ADDR, 800
setup_pll PLL3_BASE_ADDR, 216
setup_pll PLL3_BASE_ADDR, 400
/* Switch peripheral to PLL3 */
ldr r0, =CCM_BASE_ADDR
ldr r1, =0x00015154
str r1, [r0, #CLKCTL_CBCMR]
ldr r1, =0x02888945
orr r1, r1, #(1 << 16)
str r1, [r0, #CLKCTL_CBCDR]
/* make sure change is effective */
1: ldr r1, [r0, #CLKCTL_CDHIPR]
cmp r1, #0x0
bne 1b
setup_pll PLL2_BASE_ADDR, 400
/* Switch peripheral to PLL2 */
ldr r0, =CCM_BASE_ADDR
ldr r1, =0x00808145
orr r1, r1, #(2 << 10)
orr r1, r1, #(0 << 16)
orr r1, r1, #(1 << 19)
str r1, [r0, #CLKCTL_CBCDR]
ldr r1, =0x00016154
str r1, [r0, #CLKCTL_CBCMR]
/*change uart clk parent to pll2*/
ldr r1, [r0, #CLKCTL_CSCMR1]
and r1, r1, #0xfcffffff
orr r1, r1, #0x01000000
str r1, [r0, #CLKCTL_CSCMR1]
/* make sure change is effective */
1: ldr r1, [r0, #CLKCTL_CDHIPR]
cmp r1, #0x0
bne 1b
setup_pll PLL3_BASE_ADDR, 216
setup_pll PLL4_BASE_ADDR, 455
/* Set the platform clock dividers */
ldr r0, =ARM_BASE_ADDR
ldr r1, =0x00000725
ldr r1, =0x00000124
str r1, [r0, #0x14]
ldr r0, =CCM_BASE_ADDR
mov r1, #0
str r1, [r0, #CLKCTL_CACRR]
/* Switch ARM back to PLL 1 */
str r4, [r0, #CLKCTL_CCSR]
/* Switch ARM back to PLL 1. */
mov r1, #0x0
str r1, [r0, #CLKCTL_CCSR]
/* make uart div=6 */
ldr r1, [r0, #CLKCTL_CSCDR1]
and r1, r1, #0xffffffc0
orr r1, r1, #0x0a
str r1, [r0, #CLKCTL_CSCDR1]
/* Restore the default values in the Gate registers */
ldr r1, =0xFFFFFFFF
@ -322,36 +368,14 @@ setup_pll_func:
str r1, [r0, #CLKCTL_CCGR6]
str r1, [r0, #CLKCTL_CCGR7]
/* Switch peripheral to PLL2 */
ldr r0, =CCM_BASE_ADDR
ldr r1, =0x00808145
orr r1, r1, #2 << 10
orr r1, r1, #1 << 19
str r1, [r0, #CLKCTL_CBCDR]
mov r1, #0x00000
str r1, [r0, #CLKCTL_CCDR]
ldr r1, =0x00016154
str r1, [r0, #CLKCTL_CBCMR]
/* Change uart clk parent to pll2*/
ldr r1, [r0, #CLKCTL_CSCMR1]
and r1, r1, #0xfcffffff
orr r1, r1, #0x01000000
str r1, [r0, #CLKCTL_CSCMR1]
ldr r1, [r0, #CLKCTL_CSCDR1]
and r1, r1, #0xffffffc0
orr r1, r1, #0x0a
str r1, [r0, #CLKCTL_CSCDR1]
/* for cko - for ARM div by 8 */
mov r1, #0x000A0000
add r1, r1, #0x00000F0
str r1, [r0, #CLKCTL_CCOSR]
/* make sure divider effective */
1: ldr r1, [r0, #CLKCTL_CDHIPR]
cmp r1, #0x0
bne 1b
str r4, [r0, #CLKCTL_CCDR]
/* for cko - for ARM div by 8 */
mov r1, #0x000A0000
add r1, r1, #0x00000F0
str r1, [r0, #CLKCTL_CCOSR]
#endif /* CONFIG_MX53 */
.endm
@ -405,3 +429,9 @@ W_DP_665: .word DP_OP_665
W_DP_216: .word DP_OP_216
.word DP_MFD_216
.word DP_MFN_216
W_DP_400: .word DP_OP_400
.word DP_MFD_400
.word DP_MFN_400
W_DP_455: .word DP_OP_455
.word DP_MFD_455
.word DP_MFN_455

4
arch/arm/include/asm/arch-mx5/imx-regs.h
View file

@ -308,6 +308,10 @@
#define DP_MFD_400 (3 - 1)
#define DP_MFN_400 1
#define DP_OP_455 ((9 << 4) + ((2 - 1) << 0))
#define DP_MFD_455 (48 - 1)
#define DP_MFN_455 23
#define DP_OP_216 ((6 << 4) + ((3 - 1) << 0))
#define DP_MFD_216 (4 - 1)
#define DP_MFN_216 3