----- Original Message -----
From: "Talis, Gilles" <g-talis@xxxxxx>
To: <linux-omap@xxxxxxxxxxxxxxx>
Sent: Tuesday, February 09, 2010 3:06 PM
Subject: OMAP3 Slave McSPI driver
Hi,
My customer is using Android 2.6.29 kernel from OMAPZOOM and is looking
for support for slave mode on the SPI driver.
I saw there were patches for this feature sent to this list, but I was
wondering if those patches were tested on 2.6.29.
These patches have not been specifically tested on 29 kernel, but you could
give it a shot. Pl also look at the latest patches (V2) posted.
I am also looking for some kind of API usage guidelines. How to setup the
slave mode and how is OMAP notified that data have been received from
external master device? My customer plans to use this driver in interrupt
mode (no DMA needed).
To set any mcspi controller to slave mode, you need to modify
arch/arm/mach-omap2/devices.c file and set mode to OMAP2_MCSPI_SLAVE.
Typically gpio is used by master to notify the slave that it is ready to
transfer data. On gpio interrupt slave client could issue spi_read/spi_write
commands.
Two modes are supported i.e PIO and DMA. Any specific reason not to use DMA
mode.
Thanks
Hemanth
Thanks
Gilels.
Texas Instruments France SA, 821 Avenue Jack Kilby, 06270 Villeneuve
Loubet. 036 420 040 R.C.S Antibes. Capital de EUR 753.920
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