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6 Commits

Author SHA1 Message Date
Leif Middelschulte
f72efa7e69 spi-imx: Implements handling of the SPI_READY mode flag. 
This patch implements consideration of the SPI_READY mode flag as
defined in spi.h. It extends the device tree bindings to support
the values defined by the reference manual for the DRCTL field.

Thus supporting edge-triggered and level-triggered bursts.

Signed-off-by: Leif Middelschulte <Leif.Middelschulte@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
 2017-04-25 16:37:53 +01:00
Alexander Shiyan
956fff7189 spi: imx: Update DT binding documentation 
Mark "fsl,spi-num-chipselects" property as obsolete.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Mark Brown <broonie@kernel.org>
 2016-06-14 10:19:50 +01:00
Matt Porter
7f43a87e06 spi: fsl-imx-cspi: add explicit compatible strings and required clock properties 
The fsl-imx-cspi binding contains language indicating compatible
strings to be used that is not valid for all supported parts
e.g. Should be "fsl,<soc>-cspi" or "fsl,<soc>-ecspi". Fix this
by enumerating the set of valid compatible strings.

The binding is also missing the clocks/clock-names properties
so document these and the two required ipg and per clocks.

Signed-off-by: Matt Porter <mporter@konsulko.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
 2015-03-05 17:07:06 +00:00
Robin Gong
f62caccd12 spi: spi-imx: add DMA support 
Enable DMA support on i.mx6. The read speed can increase from 600KB/s
to 1.2MB/s on i.mx6q. You can disable or enable dma function in dts.
If not set "dma-names" in dts, spi will use PIO mode. This patch only
validate on i.mx6, not i.mx5, but encourage ones to apply this patch
on i.mx5 since they share the same IP.

Note:
  Sometime, there is a weid data in rxfifo after one full tx/rx
transfer finish by DMA on i.mx6dl, so we disable dma functhion on
i.mx6dl.

Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: Robin Gong <b38343@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
 2014-09-17 11:36:11 -07:00
Fabio Estevam
37797d5f2e dt: fsl-imx-cspi.txt: Fix comment about GPIOs used for chip selects 
The gpio numbers does not match the comment.

Fix the comments for GPIOs used for chip selects.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
 2012-06-13 13:34:39 -05:00
Shawn Guo
22a85e4cd5 spi/imx: add device tree probe support 
It adds device tree probe support for spi-imx driver.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
 2011-07-14 13:47:18 -06:00