67 lines
1.2 KiB
C
67 lines
1.2 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>
|
||
|
|
|
||
|
|
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);
|
||
|
|
}
|