88 lines
3.2 KiB
C
88 lines
3.2 KiB
C
/****************************************************************************
|
|
* arch/arm/src/lpc31xx/lpc31_bcrndx.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/* References:
|
|
* - UM10314 LPC3130/31 User manual Rev. 1.01 — 9 September 2009
|
|
* - lpc313x.cdl.drivers.zip example driver code
|
|
*/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <stdint.h>
|
|
|
|
#include "arm_internal.h"
|
|
#include "lpc31_cgudrvr.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: lpc31_bcrndx
|
|
*
|
|
* Description:
|
|
* Only 5 of the 12 domains have an associated BCR register. This
|
|
* function returns the index to the associated BCR register (if any)
|
|
* or BCRNDX_INVALID otherwise.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int lpc31_bcrndx(enum lpc31_domainid_e dmnid)
|
|
{
|
|
switch (dmnid)
|
|
{
|
|
/* BCR0-3 correspond directly to domains 0-3 */
|
|
|
|
case DOMAINID_SYS: /* Domain 0: SYS_BASE */
|
|
case DOMAINID_AHB0APB0: /* Domain 1: AHB0APB0_BASE */
|
|
case DOMAINID_AHB0APB1: /* Domain 2: AHB0APB1_BASE */
|
|
case DOMAINID_AHB0APB2: /* Domain 3: AHB0APB2_BASE */
|
|
return (int)dmnid;
|
|
|
|
/* There is a BCR register corresponding to domain 7, but it is at
|
|
* index 4
|
|
*/
|
|
|
|
case DOMAINID_CLK1024FS: /* Domain 7: CLK1024FS_BASE */
|
|
return 4;
|
|
|
|
default: /* There is no BCR register for the other
|
|
* domains. */
|
|
break;
|
|
}
|
|
|
|
return BCRNDX_INVALID;
|
|
}
|