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u-boot/arch
Lokesh Vutla eda6fbcc8c ARM: DRA7: Add support for IO delay configuration
On DRA7, in addition to the regular muxing of pins, an additional
hardware module called IODelay which is also expected to be
configured. This "IODelay" module has it's own register space that is
independent of the control module.

It is advocated strongly in TI's official documentation considering
the existing design of the DRA7 family of processors during mux or
IODelay recalibration, there is a potential for a significant glitch
which may cause functional impairment to certain hardware. It is
hence recommended to do muxing as part of IOdelay recalibration.

IODELAY recalibration sequence:
- Complete AVS voltage change on VDD_CORE_L
- Unlock IODLAY config registers.
- Perform IO delay calibration with predefined values.
- Isolate all the IOs
- Update the delay mechanism for each IO with new calibrated values.
- Configure PAD configuration registers
- De-isolate all the IOs.
- Relock IODELAY config registers.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
2015-06-12 13:02:05 -04:00
..
arc arc: gitignore: ignore ARC DTBs 2015-05-18 12:06:36 +03:00
arm ARM: DRA7: Add support for IO delay configuration 2015-06-12 13:02:05 -04:00
avr32 avr32: delete ancient board.c 2015-06-10 14:03:26 +02:00
blackfin arch: Make board selection choices optional 2015-05-12 18:10:02 -04:00
m68k arch: Make board selection choices optional 2015-05-12 18:10:02 -04:00
microblaze arch: Make board selection choices optional 2015-05-12 18:10:02 -04:00
mips arch: Make board selection choices optional 2015-05-12 18:10:02 -04:00
nds32 arch: Make board selection choices optional 2015-05-12 18:10:02 -04:00
nios2 arch: Make board selection choices optional 2015-05-12 18:10:02 -04:00
openrisc arch: Make board selection choices optional 2015-05-12 18:10:02 -04:00
powerpc powerpc: gitignore: ignore PowerPC DTBs 2015-05-28 08:18:20 -04:00
sandbox sandbox: Add an implementation for cleanup_before_linux_select() 2015-06-10 19:26:54 -06:00
sh arch: Make board selection choices optional 2015-05-12 18:10:02 -04:00
sparc arch: Make board selection choices optional 2015-05-12 18:10:02 -04:00
x86 x86: gpio: add pinctrl support from the device tree 2015-06-04 03:32:08 -06:00
.gitignore .gitignore: drop include/asm/proc from ignore pattern 2014-06-19 11:18:54 -04:00
Kconfig x86: Kconfig: Move DM_SPI & DM_SPI_FLASH to arch/Kconfig 2015-04-29 18:51:50 -06:00