116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/****************************************************************************
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* arch/arm/src/sama5/sam_pmc.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_SAMA5_SAM_PMC_H
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#define __ARCH_ARM_SRC_SAMA5_SAM_PMC_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Functions Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: sam_pllack_frequency
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*
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* Description:
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* Given the Main Clock frequency that provides the input to PLLA, return
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* the frequency of the PPA output clock, PLLACK
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*
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* Assumptions:
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* PLLA is enabled. If the PLL is is disabled, either at the input divider
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* or the output multiplier, the value zero is returned.
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*
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****************************************************************************/
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uint32_t sam_pllack_frequency(uint32_t mainclk);
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/****************************************************************************
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* Name: sam_plladiv2_frequency
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*
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* Description:
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* The PLLACK input to most clocking may or may not be divided by two.
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* This function will return the possibly divided PLLACK clock input
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* frequency.
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*
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* Assumptions:
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* See sam_pllack_frequency.
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*
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****************************************************************************/
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uint32_t sam_plladiv2_frequency(uint32_t mainclk);
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/****************************************************************************
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* Name: sam_pck_frequency
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*
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* Description:
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* Given the Main Clock frequency that provides the input to PLLA, return
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* the frequency of the processor clock (PCK).
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*
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* Assumptions:
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* PLLA is enabled and the either the main clock or the PLLA output clock
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* (PLLACK) provides the input to the MCK prescaler.
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*
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****************************************************************************/
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uint32_t sam_pck_frequency(uint32_t mainclk);
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/****************************************************************************
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* Name: sam_mck_frequency
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*
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* Description:
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* Given the Main Clock frequency that provides the input to PLLA, return
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* the frequency of the PPA output clock, PLLACK
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*
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* Assumptions:
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* PLLA is enabled and the either the main clock or the PLLA output clock
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* (PLLACK) provides the input to the MCK prescaler.
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*
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****************************************************************************/
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uint32_t sam_mck_frequency(uint32_t mainclk);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_SAMA5_SAM_PMC_H */
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