ARM: at91: clock: add a new file to handle clock
To reduce the duplicated code, add a new file to accommodate
the peripheral's and system's clock handle code, shared with
the SoCs with different ARM core.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Tested-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/arch/arm/mach-at91/clock.c b/arch/arm/mach-at91/clock.c
new file mode 100644
index 0000000..2a0308f
--- /dev/null
+++ b/arch/arm/mach-at91/clock.c
@@ -0,0 +1,66 @@
+/*
+ * 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);
+}