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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
121 lines
2.4 KiB
C
121 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015 Atmel Corporation
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* Wenyou Yang <wenyou.yang@atmel.com>
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/at91_pmc.h>
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#define EN_UPLL_TIMEOUT 500
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void at91_periph_clk_enable(int id)
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{
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struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
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#ifdef CPU_HAS_PCR
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u32 regval;
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u32 div_value;
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if (id > AT91_PMC_PCR_PID_MASK)
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return;
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writel(id, &pmc->pcr);
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div_value = readl(&pmc->pcr) & AT91_PMC_PCR_DIV;
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regval = AT91_PMC_PCR_EN | AT91_PMC_PCR_CMD_WRITE | id | div_value;
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writel(regval, &pmc->pcr);
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#else
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writel(0x01 << id, &pmc->pcer);
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#endif
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}
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void at91_periph_clk_disable(int id)
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{
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struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
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#ifdef CPU_HAS_PCR
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u32 regval;
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if (id > AT91_PMC_PCR_PID_MASK)
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return;
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regval = AT91_PMC_PCR_CMD_WRITE | id;
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writel(regval, &pmc->pcr);
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#else
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writel(0x01 << id, &pmc->pcdr);
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#endif
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}
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void at91_system_clk_enable(int sys_clk)
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{
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struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
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writel(sys_clk, &pmc->scer);
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}
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void at91_system_clk_disable(int sys_clk)
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{
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struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
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writel(sys_clk, &pmc->scdr);
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}
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int at91_upll_clk_enable(void)
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{
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struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
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ulong start_time, tmp_time;
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if ((readl(&pmc->uckr) & AT91_PMC_UPLLEN) == AT91_PMC_UPLLEN)
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return 0;
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start_time = get_timer(0);
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writel(AT91_PMC_UPLLEN | AT91_PMC_BIASEN, &pmc->uckr);
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while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU) {
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tmp_time = get_timer(0);
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if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
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printf("ERROR: failed to enable UPLL\n");
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return -1;
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}
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}
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return 0;
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}
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int at91_upll_clk_disable(void)
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{
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struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
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ulong start_time, tmp_time;
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start_time = get_timer(0);
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writel(readl(&pmc->uckr) & ~AT91_PMC_UPLLEN, &pmc->uckr);
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while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU) {
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tmp_time = get_timer(0);
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if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
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printf("ERROR: failed to stop UPLL\n");
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return -1;
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}
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}
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return 0;
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}
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void at91_usb_clk_init(u32 value)
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{
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struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
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writel(value, &pmc->usb);
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}
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void at91_pllicpr_init(u32 icpr)
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{
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struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
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writel(icpr, &pmc->pllicpr);
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}
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