Wenyou Yang | 41bf25c | 2016-02-03 10:16:48 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 Atmel Corporation |
| 3 | * Wenyou Yang <wenyou.yang@atmel.com> |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 6 | */ |
| 7 | |
| 8 | #include <common.h> |
| 9 | #include <asm/io.h> |
| 10 | #include <asm/arch/hardware.h> |
| 11 | #include <asm/arch/at91_pmc.h> |
| 12 | |
| 13 | void at91_periph_clk_enable(int id) |
| 14 | { |
| 15 | struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; |
| 16 | |
| 17 | #ifdef CPU_HAS_PCR |
| 18 | u32 regval; |
| 19 | u32 div_value; |
| 20 | |
| 21 | if (id > AT91_PMC_PCR_PID_MASK) |
| 22 | return; |
| 23 | |
| 24 | writel(id, &pmc->pcr); |
| 25 | |
| 26 | div_value = readl(&pmc->pcr) & AT91_PMC_PCR_DIV; |
| 27 | |
| 28 | regval = AT91_PMC_PCR_EN | AT91_PMC_PCR_CMD_WRITE | id | div_value; |
| 29 | |
| 30 | writel(regval, &pmc->pcr); |
| 31 | #else |
| 32 | writel(0x01 << id, &pmc->pcer); |
| 33 | #endif |
| 34 | } |
| 35 | |
| 36 | void at91_periph_clk_disable(int id) |
| 37 | { |
| 38 | struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; |
| 39 | |
| 40 | #ifdef CPU_HAS_PCR |
| 41 | u32 regval; |
| 42 | |
| 43 | if (id > AT91_PMC_PCR_PID_MASK) |
| 44 | return; |
| 45 | |
| 46 | regval = AT91_PMC_PCR_CMD_WRITE | id; |
| 47 | |
| 48 | writel(regval, &pmc->pcr); |
| 49 | #else |
| 50 | writel(0x01 << id, &pmc->pcdr); |
| 51 | #endif |
| 52 | } |
| 53 | |
| 54 | void at91_system_clk_enable(int sys_clk) |
| 55 | { |
| 56 | struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; |
| 57 | |
| 58 | writel(sys_clk, &pmc->scer); |
| 59 | } |
| 60 | |
| 61 | void at91_system_clk_disable(int sys_clk) |
| 62 | { |
| 63 | struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; |
| 64 | |
| 65 | writel(sys_clk, &pmc->scdr); |
| 66 | } |