Le 17.06.2010 16:12, Sergei Shtylyov a écrit :
Christophe Aeschlimann wrote:
I was surprised to see that the PINMUX registers configuration (in
da850.c) is SOC dependant (part of common initialisation).
Frankly speaking, I don't see where the pin lists are a part of common
initialization. Unless you mean da850_pins[] -- that is SoC specific of
course as the PinMux registers are situated in the SoC.
Yes I realised that after Caglar's answer. I first thought the
da850_pins structure in da850.c was used to define the functionality
of every PINMUX where it just defines a possible configuration.
I think the PINMUX configuration is definitely a board specific
setting.
The pin lists there are just the default ones, readily overridable by
the board code. With the annoyng exception of da850_nand_pins[] and
da850_nor_pins[] which should have been in board-da850-evm.c really...
Do you agree with me ? Did I miss something and the PINMUX
configuration can already be easily overloaded in the board specific
configuration ?
Yes.
I was just surprised I had to add my own PINMUX possible configuration
inside the da850_pins struct in da850.c
No wonder -- that table is just incomplete. TI was too lazy to enter
every PinMux field there.
Ok :)
so I could have a board specific list of pins inside my board specific
file. Or maybe there is another way to handle that ?
No, you describe how to enable the pins in da850_pins[], and you enable
the pins you need in your board code.
Yes that what I meant, I was talking about the equivalent of the
da850_mmcsd0_pins array for a custom feature on our board.
To summarize :
- The description of alternative PINMUX configuration takes place in
da850_pins[] in da850.c
- Group of pins that describe a new feature can be defined in the
board-specific file (so they can be enabled in one call)
- Programming the pinmux takes place in board-specific file using the
da8xx_pinmux_setup now renamed to davinci_cfg_reg_list.
Regards,
WBR, Sergei
Thank you for your help and clear explanations,
Regards,
--
Christophe Aeschlimann
Embedded Software Engineer
Advanced Communications Networks S.A.
Rue du Puits-Godet 8a
2000 Neuchâtel, Switzerland
Tél. +41 32 724 74 31
[email protected]
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