| /* |
| * 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); |
| } |