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mx5: lowlevel_init.S: Split init_clock macro

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init_clock is currently shared between mx51 and mx53 and it contains lots of
ifdef's which makes it really hard to follow the code.

Split the init_clock between mx51 and mx53 to allow easier readability.

No functional changes are made.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
This commit is contained in:
Fabio Estevam 2012-10-15 05:37:15 +00:00 • committed by Stefano Babic
parent 5676f598e7
commit 758c344945
1 changed files with 65 additions and 30 deletions
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95
arch/arm/cpu/armv7/mx5/lowlevel_init.S
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@ -162,9 +162,9 @@ setup_pll_func:
.endm
.macro init_clock
#if defined (CONFIG_MX51)
ldr r0, =CCM_BASE_ADDR
#if defined(CONFIG_MX51)
/* Gate of clocks to the peripherals first */
ldr r1, =0x3FFFFFFF
str r1, [r0, #CLKCTL_CCGR0]
@ -190,21 +190,6 @@ setup_pll_func:
1: ldr r1, [r0, #CLKCTL_CDHIPR]
cmp r1, #0x0
bne 1b
#else
ldr r1, =0x3FFFFFFF
str r1, [r0, #CLKCTL_CCGR0]
str r4, [r0, #CLKCTL_CCGR1]
str r4, [r0, #CLKCTL_CCGR2]
str r4, [r0, #CLKCTL_CCGR3]
str r4, [r0, #CLKCTL_CCGR7]
ldr r1, =0x00030000
str r1, [r0, #CLKCTL_CCGR4]
ldr r1, =0x00FFF030
str r1, [r0, #CLKCTL_CCGR5]
ldr r1, =0x0F00030F
str r1, [r0, #CLKCTL_CCGR6]
#endif
/* Switch ARM to step clock */
mov r1, #0x4
@ -217,7 +202,6 @@ setup_pll_func:
setup_pll PLL1_BASE_ADDR, 800
#endif
#if defined(CONFIG_MX51)
setup_pll PLL3_BASE_ADDR, 665
/* Switch peripheral to PLL 3 */
@ -234,7 +218,7 @@ setup_pll_func:
str r1, [r0, #CLKCTL_CBCDR]
ldr r1, =0x000020C0 | CONFIG_SYS_DDR_CLKSEL
str r1, [r0, #CLKCTL_CBCMR]
#endif
setup_pll PLL3_BASE_ADDR, 216
/* Set the platform clock dividers */
@ -244,21 +228,17 @@ setup_pll_func:
ldr r0, =CCM_BASE_ADDR
#if defined(CONFIG_MX51)
/* Run 3.0 at Full speed, for other TO's wait till we increase VDDGP */
ldr r3, [r4, #ROM_SI_REV]
cmp r3, #0x10
movls r1, #0x1
movhi r1, #0
#else
mov r1, #0
#endif
str r1, [r0, #CLKCTL_CACRR]
/* Switch ARM back to PLL 1 */
str r4, [r0, #CLKCTL_CCSR]
#if defined(CONFIG_MX51)
/* setup the rest */
/* Use lp_apm (24MHz) source for perclk */
ldr r1, =0x000020C2 | CONFIG_SYS_DDR_CLKSEL
@ -266,7 +246,6 @@ setup_pll_func:
/* ddr clock from PLL 1, all perclk dividers are 1 since using 24MHz */
ldr r1, =CONFIG_SYS_CLKTL_CBCDR
str r1, [r0, #CLKCTL_CBCDR]
#endif
/* Restore the default values in the Gate registers */
ldr r1, =0xFFFFFFFF
@ -277,17 +256,72 @@ setup_pll_func:
str r1, [r0, #CLKCTL_CCGR4]
str r1, [r0, #CLKCTL_CCGR5]
str r1, [r0, #CLKCTL_CCGR6]
#if defined(CONFIG_MX53)
str r1, [r0, #CLKCTL_CCGR7]
#endif
#if defined(CONFIG_MX51)
/* Use PLL 2 for UART's, get 66.5MHz from it */
ldr r1, =0xA5A2A020
str r1, [r0, #CLKCTL_CSCMR1]
ldr r1, =0x00C30321
str r1, [r0, #CLKCTL_CSCDR1]
#elif defined(CONFIG_MX53)
/* 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]
#else /* CONFIG_MX53 */
ldr r0, =CCM_BASE_ADDR
/* Gate of clocks to the peripherals first */
ldr r1, =0x3FFFFFFF
str r1, [r0, #CLKCTL_CCGR0]
str r4, [r0, #CLKCTL_CCGR1]
str r4, [r0, #CLKCTL_CCGR2]
str r4, [r0, #CLKCTL_CCGR3]
str r4, [r0, #CLKCTL_CCGR7]
ldr r1, =0x00030000
str r1, [r0, #CLKCTL_CCGR4]
ldr r1, =0x00FFF030
str r1, [r0, #CLKCTL_CCGR5]
ldr r1, =0x0F00030F
str r1, [r0, #CLKCTL_CCGR6]
/* Switch ARM to step clock */
mov r1, #0x4
str r1, [r0, #CLKCTL_CCSR]
setup_pll PLL1_BASE_ADDR, 800
setup_pll PLL3_BASE_ADDR, 216
/* Set the platform clock dividers */
ldr r0, =ARM_BASE_ADDR
ldr r1, =0x00000725
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]
/* Restore the default values in the Gate registers */
ldr r1, =0xFFFFFFFF
str r1, [r0, #CLKCTL_CCGR0]
str r1, [r0, #CLKCTL_CCGR1]
str r1, [r0, #CLKCTL_CCGR2]
str r1, [r0, #CLKCTL_CCGR3]
str r1, [r0, #CLKCTL_CCGR4]
str r1, [r0, #CLKCTL_CCGR5]
str r1, [r0, #CLKCTL_CCGR6]
str r1, [r0, #CLKCTL_CCGR7]
/* Switch peripheral to PLL2 */
ldr r0, =CCM_BASE_ADDR
ldr r1, =0x00808145
@ -306,7 +340,7 @@ setup_pll_func:
and r1, r1, #0xffffffc0
orr r1, r1, #0x0a
str r1, [r0, #CLKCTL_CSCDR1]
#endif
/* make sure divider effective */
1: ldr r1, [r0, #CLKCTL_CDHIPR]
cmp r1, #0x0
@ -318,6 +352,7 @@ setup_pll_func:
mov r1, #0x000A0000
add r1, r1, #0x00000F0
str r1, [r0, #CLKCTL_CCOSR]
#endif /* CONFIG_MX53 */
.endm
.macro setup_wdog