Hi Marek,
On 6/17/19 8:49 AM, Lukasz Majewski wrote:
Hi Marek,
On 6/16/19 12:34 AM, Lukasz Majewski wrote:
This commit converts mxs_spi driver to support DM/DTS.
Signed-off-by: Lukasz Majewski lukma@denx.de
Is the non-DM part needed for anything ?
Do you mean the non-DM part of the mxs_gpio driver? Yes, it is used by not converted boards.
This is a SPI driver though.
I recall the SPL jumps back to BootROM when loading the U-Boot proper. So if not, drop it.
Also, please don't do partial conversion for iMX28 only, do the iMX23 part as well, it cannot be hard.
Maybe it is not hard, but I cannot test it properly as I don't have i.MX23 device. If you are offering your help with testing (i.e. you do have the access to i.MX23 device and you will test those changes) I can add support for it.
Otherwise, NO, I will not add ANY new untested code.
In general, you don't have to add any code, the iMX23/28 SPI IP is very much the same hardware, DTTO for most of the other blocks. If there are any differences between iMX23/28, they are already handled in the existing driver(s).
Half-way converted drivers in fact increase maintenance burden, because then we have to deal with two different variants of the code, instead of only one.
I cannot agree with this sentence. The conversion would be done for i.MX28, which is then tested and validated (and clearly stated in the cover letter/commit message that only supported was i.MX28).
If I don't need to adjust common, reused code (which already supports both variants as it is the case with mxs_spi.c), then I don't mind.
For more intrusive changes - the driver needs to be tested and validated (by somebody who has the HW for testing).
That's why I would like to see this practice go away wherever possible, and in this case it is possible.
In this particular case it is possible to add support for both as SoC specific changes (i.MX23 vs i.MX28) is performed in common code (e.g. mxs_spi_xfer_dma).
If you need someone to test your changes, CC the board maintainers, that's standard practice.
As fair as I remember only Angelo and Michael had also interest in testing converted code for i.MX28 based board.
There was NO reply from other people when this (and few others) driver was marked as DEPRECATED.
If they don't respond, that cannot be helped.
Best regards,
Lukasz Majewski
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