mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-12 16:07:30 +00:00
c0b868c087
To avoid the duplicated code, add the PMC_PLLICPR init function. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Tested-by: Heiko Schocher <hs@denx.de> Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
121 lines
2.4 KiB
C
121 lines
2.4 KiB
C
/*
|
|
* Copyright (C) 2015 Atmel Corporation
|
|
* Wenyou Yang <wenyou.yang@atmel.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/hardware.h>
|
|
#include <asm/arch/at91_pmc.h>
|
|
|
|
#define EN_UPLL_TIMEOUT 500
|
|
|
|
void at91_periph_clk_enable(int id)
|
|
{
|
|
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
|
|
|
|
#ifdef CPU_HAS_PCR
|
|
u32 regval;
|
|
u32 div_value;
|
|
|
|
if (id > AT91_PMC_PCR_PID_MASK)
|
|
return;
|
|
|
|
writel(id, &pmc->pcr);
|
|
|
|
div_value = readl(&pmc->pcr) & AT91_PMC_PCR_DIV;
|
|
|
|
regval = AT91_PMC_PCR_EN | AT91_PMC_PCR_CMD_WRITE | id | div_value;
|
|
|
|
writel(regval, &pmc->pcr);
|
|
#else
|
|
writel(0x01 << id, &pmc->pcer);
|
|
#endif
|
|
}
|
|
|
|
void at91_periph_clk_disable(int id)
|
|
{
|
|
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
|
|
|
|
#ifdef CPU_HAS_PCR
|
|
u32 regval;
|
|
|
|
if (id > AT91_PMC_PCR_PID_MASK)
|
|
return;
|
|
|
|
regval = AT91_PMC_PCR_CMD_WRITE | id;
|
|
|
|
writel(regval, &pmc->pcr);
|
|
#else
|
|
writel(0x01 << id, &pmc->pcdr);
|
|
#endif
|
|
}
|
|
|
|
void at91_system_clk_enable(int sys_clk)
|
|
{
|
|
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
|
|
|
|
writel(sys_clk, &pmc->scer);
|
|
}
|
|
|
|
void at91_system_clk_disable(int sys_clk)
|
|
{
|
|
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
|
|
|
|
writel(sys_clk, &pmc->scdr);
|
|
}
|
|
|
|
int at91_upll_clk_enable(void)
|
|
{
|
|
struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
|
|
ulong start_time, tmp_time;
|
|
|
|
if ((readl(&pmc->uckr) & AT91_PMC_UPLLEN) == AT91_PMC_UPLLEN)
|
|
return 0;
|
|
|
|
start_time = get_timer(0);
|
|
writel(AT91_PMC_UPLLEN | AT91_PMC_BIASEN, &pmc->uckr);
|
|
while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU) {
|
|
tmp_time = get_timer(0);
|
|
if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
|
|
printf("ERROR: failed to enable UPLL\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int at91_upll_clk_disable(void)
|
|
{
|
|
struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
|
|
ulong start_time, tmp_time;
|
|
|
|
start_time = get_timer(0);
|
|
writel(readl(&pmc->uckr) & ~AT91_PMC_UPLLEN, &pmc->uckr);
|
|
while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU) {
|
|
tmp_time = get_timer(0);
|
|
if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
|
|
printf("ERROR: failed to stop UPLL\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void at91_usb_clk_init(u32 value)
|
|
{
|
|
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
|
|
|
|
writel(value, &pmc->usb);
|
|
}
|
|
|
|
void at91_pllicpr_init(u32 icpr)
|
|
{
|
|
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
|
|
|
|
writel(icpr, &pmc->pllicpr);
|
|
}
|