linux/arch/blackfin/mach-bf537/Kconfig
Michael Hennerich 2adcf194cb Blackfin: SIC: BF537: change default data/error relative priorities
Some peripherals might generate an error interrupt shortly after the
data interrupt due to the fact that the peripheral isn't serviced fast
enough.  In most cases this isn't a problem and is expected behavior.
This hasn't been a problem on most parts since you simply don't request
the error interrupt (or you leave it disabled while there is an expected
state) and do the peripheral status checking in the data interrupt.

The Blackfin SIC allows people to prioritize data and error interrupts,
and the Blackfin CEC allows interrupts of equal or higher priority to
nest.  The current default settings gives error interrupts a higher
priority than data interrupts.  So if an error occurs while processing
the data interrupt, it will be serviced immediately.

However, the error interrupt on the BF537 SIC cannot be enabled on a
per-peripheral basis.  Once the error interrupt is enabled for one
peripheral, it is automatically enabled for all peripherals.

Therefore lower the default multiplexed error interrupt priority so
most people need not worry themselves with this issue.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-10-22 03:48:49 -04:00

117 lines
2 KiB
Text

if (BF537 || BF534 || BF536)
source "arch/blackfin/mach-bf537/boards/Kconfig"
menu "BF537 Specific Configuration"
comment "Interrupt Priority Assignment"
menu "Priority"
config IRQ_PLL_WAKEUP
int "IRQ_PLL_WAKEUP"
default 7
config IRQ_DMA_ERROR
int "IRQ_DMA_ERROR Generic"
default 7
config IRQ_ERROR
int "IRQ_ERROR: PPI CAN MAC SPORT0 SPORT1 SPI UART0 UART1"
default 11
config IRQ_RTC
int "IRQ_RTC"
default 8
config IRQ_PPI
int "IRQ_PPI"
default 8
config IRQ_SPORT0_RX
int "IRQ_SPORT0_RX"
default 9
config IRQ_SPORT0_TX
int "IRQ_SPORT0_TX"
default 9
config IRQ_SPORT1_RX
int "IRQ_SPORT1_RX"
default 9
config IRQ_SPORT1_TX
int "IRQ_SPORT1_TX"
default 9
config IRQ_TWI
int "IRQ_TWI"
default 10
config IRQ_SPI
int "IRQ_SPI"
default 10
config IRQ_UART0_RX
int "IRQ_UART0_RX"
default 10
config IRQ_UART0_TX
int "IRQ_UART0_TX"
default 10
config IRQ_UART1_RX
int "IRQ_UART1_RX"
default 10
config IRQ_UART1_TX
int "IRQ_UART1_TX"
default 10
config IRQ_CAN_RX
int "IRQ_CAN_RX"
default 11
config IRQ_CAN_TX
int "IRQ_CAN_TX"
default 11
config IRQ_MAC_RX
int "IRQ_MAC_RX"
default 11
config IRQ_MAC_TX
int "IRQ_MAC_TX"
default 11
config IRQ_TIMER0
int "IRQ_TIMER0"
default 7 if TICKSOURCE_GPTMR0
default 8
config IRQ_TIMER1
int "IRQ_TIMER1"
default 12
config IRQ_TIMER2
int "IRQ_TIMER2"
default 12
config IRQ_TIMER3
int "IRQ_TIMER3"
default 12
config IRQ_TIMER4
int "IRQ_TIMER4"
default 12
config IRQ_TIMER5
int "IRQ_TIMER5"
default 12
config IRQ_TIMER6
int "IRQ_TIMER6"
default 12
config IRQ_TIMER7
int "IRQ_TIMER7"
default 12
config IRQ_PROG_INTA
int "IRQ_PROG_INTA"
default 12
config IRQ_PORTG_INTB
int "IRQ_PORTG_INTB"
default 12
config IRQ_MEM_DMA0
int "IRQ_MEM_DMA0"
default 13
config IRQ_MEM_DMA1
int "IRQ_MEM_DMA1"
default 13
config IRQ_WATCH
int "IRQ_WATCH"
default 13
help
Enter the priority numbers between 7-13 ONLY. Others are Reserved.
This applies to all the above. It is not recommended to assign the
highest priority number 7 to UART or any other device.
endmenu
endmenu
endif