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SAMA5D-EK: Correct system timer frequency. Input clock is MCK/2, not MCK

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This commit is contained in:
Gregory Nutt 2014-07-29 07:12:36 -06:00
parent 1b6eec572d
commit 53930d5531
13 changed files with 21 additions and 3 deletions
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11
arch/arm/src/sama5/sam_timerisr.c
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@ -52,11 +52,16 @@
#include "chip/sam_pit.h"
/****************************************************************************
* Definitions
* Pre-processor Definitions
****************************************************************************/
/* The PIT counter runs at a rate of the main clock (MCK) divided by 16 */
/* The PIT counter runs at a rate of the main clock (MCK) divided by 16.
*
* On the SAMA5D4, the clocking to the PIC may be divided down from MCK.
* Perhaps because of H32MXDIV? We will let the board.h tell us the correct
* PIT include clock by defining BOARD_PIT_FREQUENCY.
*/
#define PIT_CLOCK (BOARD_MCK_FREQUENCY >> 4)
#define PIT_CLOCK (BOARD_PIT_FREQUENCY >> 4)
/* The desired timer interrupt frequency is provided by the definition
* CLK_TCK (see include/time.h). CLK_TCK defines the desired number of

1
configs/sama5d3-xplained/include/board_384mhz.h
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@ -170,6 +170,7 @@
* but not for the SAMA5D3.
*/
#define BOARD_PIT_FREQUENCY BOARD_MCK_FREQUENCY
#define BOARD_USART_FREQUENCY BOARD_MCK_FREQUENCY
/* HSMCI clocking

1
configs/sama5d3-xplained/include/board_396mhz.h
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@ -128,6 +128,7 @@
* but not for the SAMA5D3.
*/
#define BOARD_PIT_FREQUENCY BOARD_MCK_FREQUENCY
#define BOARD_USART_FREQUENCY BOARD_MCK_FREQUENCY
#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \

1
configs/sama5d3-xplained/include/board_528mhz.h
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@ -127,6 +127,7 @@
* but not for the SAMA5D3.
*/
#define BOARD_PIT_FREQUENCY BOARD_MCK_FREQUENCY
#define BOARD_USART_FREQUENCY BOARD_MCK_FREQUENCY
#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \

1
configs/sama5d3-xplained/include/board_sdram.h
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@ -66,6 +66,7 @@
* but not for the SAMA5D3.
*/
#define BOARD_PIT_FREQUENCY BOARD_MCK_FREQUENCY
#define BOARD_USART_FREQUENCY BOARD_MCK_FREQUENCY
#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \

1
configs/sama5d3x-ek/include/board_384mhz.h
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@ -170,6 +170,7 @@
* but not for the SAMA5D3.
*/
#define BOARD_PIT_FREQUENCY BOARD_MCK_FREQUENCY
#define BOARD_USART_FREQUENCY BOARD_MCK_FREQUENCY
/* HSMCI clocking

1
configs/sama5d3x-ek/include/board_396mhz.h
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@ -128,6 +128,7 @@
* but not for the SAMA5D3.
*/
#define BOARD_PIT_FREQUENCY BOARD_MCK_FREQUENCY
#define BOARD_USART_FREQUENCY BOARD_MCK_FREQUENCY
#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \

2
configs/sama5d3x-ek/include/board_528mhz.h
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@ -127,7 +127,9 @@
* but not for the SAMA5D3.
*/
#define BOARD_PIT_FREQUENCY BOARD_MCK_FREQUENCY
#define BOARD_USART_FREQUENCY BOARD_MCK_FREQUENCY
#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
defined(CONFIG_SAMA5_UDPHS)

1
configs/sama5d3x-ek/include/board_sdram.h
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@ -66,6 +66,7 @@
* but not for the SAMA5D3.
*/
#define BOARD_PIT_FREQUENCY BOARD_MCK_FREQUENCY
#define BOARD_USART_FREQUENCY BOARD_MCK_FREQUENCY
#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \

1
configs/sama5d4-ek/include/board_384mhz.h
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@ -169,6 +169,7 @@
* REVISIT: I am not sure why this is. Perhaps because of H32MXDIV?
*/
#define BOARD_PIT_FREQUENCY (BOARD_MCK_FREQUENCY >> 1)
#define BOARD_USART_FREQUENCY (BOARD_MCK_FREQUENCY >> 1)
/* HSMCI clocking

1
configs/sama5d4-ek/include/board_396mhz.h
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@ -127,6 +127,7 @@
* REVISIT: I am not sure why this is. Perhaps because of H32MXDIV?
*/
#define BOARD_PIT_FREQUENCY (BOARD_MCK_FREQUENCY >> 1)
#define BOARD_USART_FREQUENCY (BOARD_MCK_FREQUENCY >> 1)
#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \

1
configs/sama5d4-ek/include/board_528mhz.h
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@ -126,6 +126,7 @@
* REVISIT: I am not sure why this is. Perhaps because of H32MXDIV?
*/
#define BOARD_PIT_FREQUENCY (BOARD_MCK_FREQUENCY >> 1)
#define BOARD_USART_FREQUENCY (BOARD_MCK_FREQUENCY >> 1)
#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \

1
configs/sama5d4-ek/include/board_sdram.h
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@ -67,6 +67,7 @@
* REVISIT: I am not sure why this is. Perhaps because of H32MXDIV?
*/
#define BOARD_PIT_FREQUENCY (BOARD_MCK_FREQUENCY >> 1)
#define BOARD_USART_FREQUENCY (BOARD_MCK_FREQUENCY >> 1)
#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \