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ARM: at91: clock: add PLLB enable/disable functions

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To avoid the duplicated code, add the PLLB handle functions.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
Tested-by: Heiko Schocher <hs@denx.de>
[add enable/disable functions to arm920t]
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
This commit is contained in:
Wenyou Yang 2016-02-03 10:20:43 +08:00 committed by Andreas Bießmann
parent 8d233521cd
commit be5e485cf9
3 changed files with 78 additions and 0 deletions
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38
arch/arm/mach-at91/arm920t/clock.c
View File

@ -18,6 +18,8 @@
# error You need to define CONFIG_AT91FAMILY in your board config!
#endif
#define EN_PLLB_TIMEOUT 500
DECLARE_GLOBAL_DATA_PTR;
static unsigned long at91_css_to_rate(unsigned long css)
@ -155,3 +157,39 @@ int at91_clock_init(unsigned long main_clock)
return 0;
}
int at91_pllb_clk_enable(u32 pllbr)
{
struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
ulong start_time, tmp_time;
start_time = get_timer(0);
writel(pllbr, &pmc->pllbr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB) {
tmp_time = get_timer(0);
if ((tmp_time - start_time) > EN_PLLB_TIMEOUT) {
printf("ERROR: failed to enable PLLB\n");
return -1;
}
}
return 0;
}
int at91_pllb_clk_disable(void)
{
struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
ulong start_time, tmp_time;
start_time = get_timer(0);
writel(0, &pmc->pllbr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0) {
tmp_time = get_timer(0);
if ((tmp_time - start_time) > EN_PLLB_TIMEOUT) {
printf("ERROR: failed to disable PLLB\n");
return -1;
}
}
return 0;
}

38
arch/arm/mach-at91/arm926ejs/clock.c
View File

@ -18,6 +18,8 @@
# error You need to define CONFIG_AT91FAMILY in your board config!
#endif
#define EN_PLLB_TIMEOUT 500
DECLARE_GLOBAL_DATA_PTR;
static unsigned long at91_css_to_rate(unsigned long css)
@ -242,3 +244,39 @@ void at91_mck_init(u32 mckr)
while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
;
}
int at91_pllb_clk_enable(u32 pllbr)
{
struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
ulong start_time, tmp_time;
start_time = get_timer(0);
writel(pllbr, &pmc->pllbr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB) {
tmp_time = get_timer(0);
if ((tmp_time - start_time) > EN_PLLB_TIMEOUT) {
printf("ERROR: failed to enable PLLB\n");
return -1;
}
}
return 0;
}
int at91_pllb_clk_disable(void)
{
struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
ulong start_time, tmp_time;
start_time = get_timer(0);
writel(0, &pmc->pllbr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0) {
tmp_time = get_timer(0);
if ((tmp_time - start_time) > EN_PLLB_TIMEOUT) {
printf("ERROR: failed to disable PLLB\n");
return -1;
}
}
return 0;
}

2
arch/arm/mach-at91/include/mach/clk.h
View File

@ -133,5 +133,7 @@ void at91_system_clk_disable(int sys_clk);
int at91_upll_clk_enable(void);
int at91_upll_clk_disable(void);
void at91_usb_clk_init(u32 value);
int at91_pllb_clk_enable(u32 pllbr);
int at91_pllb_clk_disable(void);
#endif /* __ASM_ARM_ARCH_CLK_H__ */