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ARM: at91: pm: add plla disable/enable support for sam9x60 

Add PLLA enable/disable support for SAM9X60.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1579522208-19523-8-git-send-email-claudiu.beznea@microchip.com
This commit is contained in:
Claudiu Beznea 2020-01-20 14:10:07 +02:00 committed by Alexandre Belloni
parent e13208ab5d
commit 4fd36e4583
1 changed files with 113 additions and 4 deletions
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117
arch/arm/mach-at91/pm_suspend.S
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@ -18,6 +18,7 @@
pmc .req r0
tmp1 .req r4
tmp2 .req r5
tmp3 .req r6
/*
* Wait until master clock is ready (after switching master clock source)
@ -331,6 +332,61 @@ ENDPROC(at91_backup_mode)
.macro at91_plla_disable
/* Save PLLA setting and disable it */
ldr tmp1, .pmc_version
cmp tmp1, #AT91_PMC_V1
beq 1f
#ifdef CONFIG_SOC_SAM9X60
/* Save PLLA settings. */
ldr tmp2, [pmc, #AT91_PMC_PLL_UPDT]
bic tmp2, tmp2, #AT91_PMC_PLL_UPDT_ID
str tmp2, [pmc, #AT91_PMC_PLL_UPDT]
/* save div. */
mov tmp1, #0
ldr tmp2, [pmc, #AT91_PMC_PLL_CTRL0]
bic tmp2, tmp2, #0xffffff00
orr tmp1, tmp1, tmp2
/* save mul. */
ldr tmp2, [pmc, #AT91_PMC_PLL_CTRL1]
bic tmp2, tmp2, #0xffffff
orr tmp1, tmp1, tmp2
str tmp1, .saved_pllar
/* step 2. */
ldr tmp1, [pmc, #AT91_PMC_PLL_UPDT]
bic tmp1, tmp1, #AT91_PMC_PLL_UPDT_UPDATE
bic tmp1, tmp1, #AT91_PMC_PLL_UPDT_ID
str tmp1, [pmc, #AT91_PMC_PLL_UPDT]
/* step 3. */
ldr tmp1, [pmc, #AT91_PMC_PLL_CTRL0]
bic tmp1, tmp1, #AT91_PMC_PLL_CTRL0_ENPLLCK
orr tmp1, tmp1, #AT91_PMC_PLL_CTRL0_ENPLL
str tmp1, [pmc, #AT91_PMC_PLL_CTRL0]
/* step 4. */
ldr tmp1, [pmc, #AT91_PMC_PLL_UPDT]
orr tmp1, tmp1, #AT91_PMC_PLL_UPDT_UPDATE
bic tmp1, tmp1, #AT91_PMC_PLL_UPDT_ID
str tmp1, [pmc, #AT91_PMC_PLL_UPDT]
/* step 5. */
ldr tmp1, [pmc, #AT91_PMC_PLL_CTRL0]
bic tmp1, tmp1, #AT91_PMC_PLL_CTRL0_ENPLL
str tmp1, [pmc, #AT91_PMC_PLL_CTRL0]
/* step 7. */
ldr tmp1, [pmc, #AT91_PMC_PLL_UPDT]
orr tmp1, tmp1, #AT91_PMC_PLL_UPDT_UPDATE
bic tmp1, tmp1, #AT91_PMC_PLL_UPDT_ID
str tmp1, [pmc, #AT91_PMC_PLL_UPDT]
b 2f
#endif
1: /* Save PLLA setting and disable it */
ldr tmp1, [pmc, #AT91_CKGR_PLLAR]
str tmp1, .saved_pllar
@ -338,17 +394,70 @@ ENDPROC(at91_backup_mode)
mov tmp1, #AT91_PMC_PLLCOUNT
orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
str tmp1, [pmc, #AT91_CKGR_PLLAR]
2:
.endm
.macro at91_plla_enable
ldr tmp2, .saved_pllar
ldr tmp3, .pmc_version
cmp tmp3, #AT91_PMC_V1
beq 4f
#ifdef CONFIG_SOC_SAM9X60
/* step 1. */
ldr tmp1, [pmc, #AT91_PMC_PLL_UPDT]
bic tmp1, tmp1, #AT91_PMC_PLL_UPDT_ID
bic tmp1, tmp1, #AT91_PMC_PLL_UPDT_UPDATE
str tmp1, [pmc, #AT91_PMC_PLL_UPDT]
/* step 2. */
ldr tmp1, =#AT91_PMC_PLL_ACR_DEFAULT_PLLA
str tmp1, [pmc, #AT91_PMC_PLL_ACR]
/* step 3. */
ldr tmp1, [pmc, #AT91_PMC_PLL_CTRL1]
mov tmp3, tmp2
bic tmp3, tmp3, #0xffffff
orr tmp1, tmp1, tmp3
str tmp1, [pmc, #AT91_PMC_PLL_CTRL1]
/* step 8. */
ldr tmp1, [pmc, #AT91_PMC_PLL_UPDT]
bic tmp1, tmp1, #AT91_PMC_PLL_UPDT_ID
orr tmp1, tmp1, #AT91_PMC_PLL_UPDT_UPDATE
str tmp1, [pmc, #AT91_PMC_PLL_UPDT]
/* step 9. */
ldr tmp1, [pmc, #AT91_PMC_PLL_CTRL0]
orr tmp1, tmp1, #AT91_PMC_PLL_CTRL0_ENLOCK
orr tmp1, tmp1, #AT91_PMC_PLL_CTRL0_ENPLL
orr tmp1, tmp1, #AT91_PMC_PLL_CTRL0_ENPLLCK
bic tmp1, tmp1, #0xff
mov tmp3, tmp2
bic tmp3, tmp3, #0xffffff00
orr tmp1, tmp1, tmp3
str tmp1, [pmc, #AT91_PMC_PLL_CTRL0]
/* step 10. */
ldr tmp1, [pmc, #AT91_PMC_PLL_UPDT]
orr tmp1, tmp1, #AT91_PMC_PLL_UPDT_UPDATE
bic tmp1, tmp1, #AT91_PMC_PLL_UPDT_ID
str tmp1, [pmc, #AT91_PMC_PLL_UPDT]
/* step 11. */
3: ldr tmp1, [pmc, #AT91_PMC_PLL_ISR0]
tst tmp1, #0x1
beq 3b
b 2f
#endif
/* Restore PLLA setting */
ldr tmp1, .saved_pllar
str tmp1, [pmc, #AT91_CKGR_PLLAR]
4: str tmp2, [pmc, #AT91_CKGR_PLLAR]
/* Enable PLLA. */
tst tmp1, #(AT91_PMC_MUL & 0xff0000)
tst tmp2, #(AT91_PMC_MUL & 0xff0000)
bne 1f
tst tmp1, #(AT91_PMC_MUL & ~0xff0000)
tst tmp2, #(AT91_PMC_MUL & ~0xff0000)
beq 2f
1: ldr tmp1, [pmc, #AT91_PMC_SR]