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@@ -0,0 +1,66 @@
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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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+ * SPDX-License-Identifier: GPL-2.0+
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+ */
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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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+
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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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+
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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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+
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+ if (id > AT91_PMC_PCR_PID_MASK)
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+ return;
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+
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+ writel(id, &pmc->pcr);
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+
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+ div_value = readl(&pmc->pcr) & AT91_PMC_PCR_DIV;
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+
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+ regval = AT91_PMC_PCR_EN | AT91_PMC_PCR_CMD_WRITE | id | div_value;
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+
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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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+
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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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+
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+#ifdef CPU_HAS_PCR
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+ u32 regval;
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+
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+ if (id > AT91_PMC_PCR_PID_MASK)
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+ return;
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+
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+ regval = AT91_PMC_PCR_CMD_WRITE | id;
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+
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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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+
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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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+
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+ writel(sys_clk, &pmc->scer);
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+}
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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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+
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+ writel(sys_clk, &pmc->scdr);
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+}
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