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arch: sc5xx: skip CDU0 CLKINSEL write on SC846 #175

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arch: sc5xx: skip CDU0 CLKINSEL write on SC846 #175

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9 changes: 8 additions & 1 deletion arch/arm/mach-sc5xx/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -59,9 +59,16 @@ config SC846
select GICV3_SUPPORT_GIC600
select GIC_600_CLEAR_RDPD
select MMC_SDHCI_ADMA_FORCE_32BIT
select FIXED_CGU1_INPUT_CLOCK
select NOP_PHY if PHY
endchoice

config FIXED_CGU1_INPUT_CLOCK
bool
help
The CDU has no CLKINSEL register, so the CGU1 input clock is
fixed to SYS_CLKIN0 and cannot be selected.

if SC57X

config TARGET_SC573_EZLITE
Expand Down Expand Up @@ -572,7 +579,7 @@ config CGU1_DIV_S1SELEX
SCLK1 = ((CLKIN / (1 + DF)) * VCO_MULT) / DIV_S1SELEX

config CDU0_CGU1_CLKIN
int "CDU0 CGU1 CLKINn Select"
int "CDU0 CGU1 CLKINn Select" if !FIXED_CGU1_INPUT_CLOCK
default 0
range 0 1
help
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8 changes: 7 additions & 1 deletion arch/arm/mach-sc5xx/init/clkinit.c
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Original file line number Diff line number Diff line change
Expand Up @@ -524,7 +524,13 @@ void cdu_init(void)
{
while (readl(REG_CDU0_STAT) & 0xffff)
;
writel((CONFIG_CDU0_CGU1_CLKIN & 0x1), REG_CDU0_CLKINSEL);

/*
* Some parts (e.g. SC846) have no CLKINSEL register; CGU1 is
* fixed to SYS_CLKIN0 there.
*/
if (!IS_ENABLED(CONFIG_FIXED_CGU1_INPUT_CLOCK))
writel((CONFIG_CDU0_CGU1_CLKIN & 0x1), REG_CDU0_CLKINSEL);

CONFIGURE_CDU0(CONFIG_CDU0_CLKO0, REG_CDU0_CFG0, 0);
CONFIGURE_CDU0(CONFIG_CDU0_CLKO1, REG_CDU0_CFG1, 1);
Expand Down
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