[U-Boot] [PATCH 1/3] Add support for PCA953x I2C gpio devices
Wolfgang Denk
wd at denx.de
Tue Nov 18 22:33:22 CET 2008
Dear Peter Tyser,
In message <1224800639-31350-2-git-send-email-ptyser at xes-inc.com> you wrote:
> Initial support for NXP's 4 and 8 bit I2C gpio expanders
> (eg pca9537, pca9557, etc). The CONFIG_PCA953X define
> enables support for the devices while the CONFIG_CMD_PCA953X
> define enables the pca953x command.
I'm not sure if we need such a detailed level of access to these
chips. We already have a couple of similar I/O expanders in some
boards, for example implemente in some PICs. See for example the "pic
read" / "pic write" conde in board/lwmon/lwmon.c etc.
I think we should generalize this - and more than read / write isn't
really needed, or is it?
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Virtue is a relative term.
-- Spock, "Friday's Child", stardate 3499.1
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