From: Maris <maris.rob-rHNaxI9ti4Y@public.gmane.org>
To: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Proposal spi.h
Date: Wed, 10 Feb 2010 08:36:27 +0100 [thread overview]
Message-ID: <op.u7wh21l67fwl0e@rob-desktop.lan> (raw)
* extend spi_device struct element 'mode' to u16 (currently u8, fully
utilized as of 2.6.3x)
* chip_select to s16 (until now also u8)
Background:
Chip select size change: allow specification of SPI-device
hardware-related spi control per device-specific (native) or gpio-based
control.
mode size change: obligatory... A mode bit could also be assigned a
selection bit: chip_select interpreted as native SSEL-index or as
gpio-index (instead of negative value for chip_select).
Chip select differentiation bottom line: Naming of the device. I'm not
sure how to establish this. spidev0.x are normally assigned for chip
selects driven by the SPI peripheral hardware. GPIO-based: spidev0.gpioxx?
-Rob
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next reply other threads:[~2010-02-10 7:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-10 7:36 Maris [this message]
[not found] <mailman.2334.1265803025.4911.spi-devel-general@lists.sourceforge.net>
[not found] ` <mailman.2334.1265803025.4911.spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
2010-02-10 12:22 ` Proposal spi.h Maris
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