android_kernel_xiaomi_sm8350/arch/arm/mach-at91/Kconfig
Andrew Victor ad48ce74f7 [ARM] 4989/1: [AT91] SAM9 ClockSource / ClockEvents
Update AT91SAM9/CAP9 PIT driver to use generic time and clockevent
infrastructure:

 - Clocksource gives sub-microsecond timestamp precision, assuming
 memory is clocked at over 16 MHz.  It's less than a 32 bit counter,
 unless it's is also generating IRQs.

 - Clockevent device supports periodic mode only; no oneshot
 support from this hardware.  No IRQs generated unless it's the
 active clocksource.

Later, another timer (probably from a TC module) can provide a oneshot
clockevent device to get NO_HZ and High-Res-Timer behavior.

This also updates the timekeeping to use the actual master clock rate
on the system, instead of compile-time <asm/arch/timex.h> constants
matching what Atmel's EK boards use.  (Product boards may well differ!)

Plus cleanup:  rename "*_timer*" symbols to "*_pit*" (there are other
timers, but only one PIT); shorter lines; remove needless CPP stuff;
make several symbols static; etc.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-17 15:55:54 +01:00

320 lines
7.7 KiB
Plaintext

if ARCH_AT91
menu "Atmel AT91 System-on-Chip"
choice
prompt "Atmel AT91 Processor"
config ARCH_AT91RM9200
bool "AT91RM9200"
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
config ARCH_AT91SAM9260
bool "AT91SAM9260 or AT91SAM9XE"
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
config ARCH_AT91SAM9261
bool "AT91SAM9261"
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
config ARCH_AT91SAM9263
bool "AT91SAM9263"
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
config ARCH_AT91SAM9RL
bool "AT91SAM9RL"
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
config ARCH_AT91CAP9
bool "AT91CAP9"
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
config ARCH_AT91X40
bool "AT91x40"
endchoice
config AT91_PMC_UNIT
bool
default !ARCH_AT91X40
# ----------------------------------------------------------
if ARCH_AT91RM9200
comment "AT91RM9200 Board Type"
config MACH_ONEARM
bool "Ajeco 1ARM Single Board Computer"
depends on ARCH_AT91RM9200
help
Select this if you are using Ajeco's 1ARM Single Board Computer.
<http://www.ajeco.fi/products.htm>
config ARCH_AT91RM9200DK
bool "Atmel AT91RM9200-DK Development board"
depends on ARCH_AT91RM9200
help
Select this if you are using Atmel's AT91RM9200-DK Development board.
(Discontinued)
config MACH_AT91RM9200EK
bool "Atmel AT91RM9200-EK Evaluation Kit"
depends on ARCH_AT91RM9200
help
Select this if you are using Atmel's AT91RM9200-EK Evaluation Kit.
<http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3507>
config MACH_CSB337
bool "Cogent CSB337"
depends on ARCH_AT91RM9200
help
Select this if you are using Cogent's CSB337 board.
<http://www.cogcomp.com/csb_csb337.htm>
config MACH_CSB637
bool "Cogent CSB637"
depends on ARCH_AT91RM9200
help
Select this if you are using Cogent's CSB637 board.
<http://www.cogcomp.com/csb_csb637.htm>
config MACH_CARMEVA
bool "Conitec ARM&EVA"
depends on ARCH_AT91RM9200
help
Select this if you are using Conitec's AT91RM9200-MCU-Module.
<http://www.conitec.net/english/linuxboard.htm>
config MACH_ATEB9200
bool "Embest ATEB9200"
depends on ARCH_AT91RM9200
help
Select this if you are using Embest's ATEB9200 board.
<http://www.embedinfo.com/english/product/ATEB9200.asp>
config MACH_KB9200
bool "KwikByte KB920x"
depends on ARCH_AT91RM9200
help
Select this if you are using KwikByte's KB920x board.
<http://kwikbyte.com/KB9202_description_new.htm>
config MACH_PICOTUX2XX
bool "picotux 200"
depends on ARCH_AT91RM9200
help
Select this if you are using a picotux 200.
<http://www.picotux.com/>
config MACH_KAFA
bool "Sperry-Sun KAFA board"
depends on ARCH_AT91RM9200
help
Select this if you are using Sperry-Sun's KAFA board.
config MACH_ECBAT91
bool "emQbit ECB_AT91 SBC"
depends on ARCH_AT91RM9200
help
Select this if you are using emQbit's ECB_AT91 board.
<http://wiki.emqbit.com/free-ecb-at91>
endif
# ----------------------------------------------------------
if ARCH_AT91SAM9260
comment "AT91SAM9260 Variants"
config ARCH_AT91SAM9260_SAM9XE
bool "AT91SAM9XE"
depends on ARCH_AT91SAM9260
help
Select this if you are using Atmel's AT91SAM9XE System-on-Chip.
They are basically AT91SAM9260s with various sizes of embedded Flash.
comment "AT91SAM9260 / AT91SAM9XE Board Type"
config MACH_AT91SAM9260EK
bool "Atmel AT91SAM9260-EK / AT91SAM9XE Evaluation Kit"
depends on ARCH_AT91SAM9260
help
Select this if you are using Atmel's AT91SAM9260-EK or AT91SAM9XE Evaluation Kit
<http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3933>
config MACH_CAM60
bool "KwikByte KB9260 (CAM60) board"
depends on ARCH_AT91SAM9260
help
Select this if you are using KwikByte's KB9260 (CAM60) board based on the Atmel AT91SAM9260.
<http://www.kwikbyte.com/KB9260.html>
config MACH_SAM9_L9260
bool "Olimex SAM9-L9260 board"
depends on ARCH_AT91SAM9260
help
Select this if you are using Olimex's SAM9-L9260 board based on the Atmel AT91SAM9260.
<http://www.olimex.com/dev/sam9-L9260.html>
endif
# ----------------------------------------------------------
if ARCH_AT91SAM9261
comment "AT91SAM9261 Board Type"
config MACH_AT91SAM9261EK
bool "Atmel AT91SAM9261-EK Evaluation Kit"
depends on ARCH_AT91SAM9261
help
Select this if you are using Atmel's AT91SAM9261-EK Evaluation Kit.
<http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3820>
endif
# ----------------------------------------------------------
if ARCH_AT91SAM9263
comment "AT91SAM9263 Board Type"
config MACH_AT91SAM9263EK
bool "Atmel AT91SAM9263-EK Evaluation Kit"
depends on ARCH_AT91SAM9263
help
Select this if you are using Atmel's AT91SAM9263-EK Evaluation Kit.
<http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4057>
endif
# ----------------------------------------------------------
if ARCH_AT91SAM9RL
comment "AT91SAM9RL Board Type"
config MACH_AT91SAM9RLEK
bool "Atmel AT91SAM9RL-EK Evaluation Kit"
depends on ARCH_AT91SAM9RL
help
Select this if you are using Atmel's AT91SAM9RL-EK Evaluation Kit.
endif
# ----------------------------------------------------------
if ARCH_AT91CAP9
comment "AT91CAP9 Board Type"
config MACH_AT91CAP9ADK
bool "Atmel AT91CAP9A-DK Evaluation Kit"
depends on ARCH_AT91CAP9
help
Select this if you are using Atmel's AT91CAP9A-DK Evaluation Kit.
<http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4138>
endif
# ----------------------------------------------------------
if ARCH_AT91X40
comment "AT91X40 Board Type"
config MACH_AT91EB01
bool "Atmel AT91EB01 Evaluation Kit"
help
Select this if you are using Atmel's AT91EB01 Evaluation Kit.
It is also a popular target for simulators such as GDB's
ARM simulator (commonly known as the ARMulator) and the
Skyeye simulator.
endif
# ----------------------------------------------------------
comment "AT91 Board Options"
config MTD_AT91_DATAFLASH_CARD
bool "Enable DataFlash Card support"
depends on (ARCH_AT91RM9200DK || MACH_AT91RM9200EK || MACH_AT91SAM9260EK || MACH_AT91SAM9261EK || MACH_AT91SAM9263EK || MACH_AT91CAP9ADK || MACH_SAM9_L9260 || MACH_ECBAT91)
help
Enable support for the DataFlash card.
config MTD_NAND_AT91_BUSWIDTH_16
bool "Enable 16-bit data bus interface to NAND flash"
depends on (MACH_AT91SAM9260EK || MACH_AT91SAM9261EK || MACH_AT91SAM9263EK || MACH_AT91CAP9ADK)
help
On AT91SAM926x boards both types of NAND flash can be present
(8 and 16 bit data bus width).
# ----------------------------------------------------------
comment "AT91 Feature Selections"
config AT91_PROGRAMMABLE_CLOCKS
bool "Programmable Clocks"
help
Select this if you need to program one or more of the PCK0..PCK3
programmable clock outputs.
config AT91_TIMER_HZ
int "Kernel HZ (jiffies per second)"
range 32 1024
depends on ARCH_AT91
default "128" if ARCH_AT91RM9200
default "100"
help
On AT91rm9200 chips where you're using a system clock derived
from the 32768 Hz hardware clock, this tick rate should divide
it exactly: use a power-of-two value, such as 128 or 256, to
reduce timing errors caused by rounding.
On AT91sam926x chips, or otherwise when using a higher precision
system clock (of at least several MHz), rounding is less of a
problem so it can be safer to use a decimal values like 100.
choice
prompt "Select a UART for early kernel messages"
config AT91_EARLY_DBGU
bool "DBGU"
config AT91_EARLY_USART0
bool "USART0"
config AT91_EARLY_USART1
bool "USART1"
config AT91_EARLY_USART2
bool "USART2"
depends on ! ARCH_AT91X40
config AT91_EARLY_USART3
bool "USART3"
depends on (ARCH_AT91RM9200 || ARCH_AT91SAM9RL || ARCH_AT91SAM9260)
config AT91_EARLY_USART4
bool "USART4"
depends on ARCH_AT91SAM9260
config AT91_EARLY_USART5
bool "USART5"
depends on ARCH_AT91SAM9260
endchoice
endmenu
endif