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https://github.com/AsahiLinux/u-boot
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c2ff69a444
With the new generic function, the scattered other functions are now removed to be replaced by the generic one. The new version also enables the configuration of the watchdog timeout via the DT "timeout-sec" property (if enabled via CONFIG_OF_CONTROL). The watchdog servicing is enabled via CONFIG_WATCHDOG. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Heiko Schocher <hs@denx.de> Cc: Eugen Hristev <eugen.hristev@microchip.com>
123 lines
2.4 KiB
C
123 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 <dm.h>
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#include <wdt.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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#include <asm/arch/at91_wdt.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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