Re: [PATCH] i3c: master: dw: split dw-i3c-master.c into master and bus specific parts

From: vitor
Date: Mon Nov 26 2018 - 07:07:07 EST

Hi Boris,

On 23/11/18 12:50, Boris Brezillon wrote:
On Fri, 23 Nov 2018 12:39:31 +0000
vitor <vitor.soares@xxxxxxxxxxxx> wrote:

Hi Boris,

On 22/11/18 20:02, Boris Brezillon wrote:
On Thu, 22 Nov 2018 17:54:54 +0000
Vitor Soares <vitor.soares@xxxxxxxxxxxx> wrote:
From: Vitor Soares <soares@xxxxxxxxxxxx>

This patch slipts dw-i3c-master.c into three pieces:
dw-i3c-master.c - contains the code that interacts directly with the
core in master mode.

dw-i3c-platdrv.c - contains the code specific to the platform driver.

dw-i3c-core.h - contains the definitions and declarations shared by
dw-i3c-master and dw-i3c-platdrv

This patch will allow SOC integrators to add their code specific to
DesignWare I3C IP.
Isn't it too early to do this change? Can't we wait until we have a SoC
that actually embeds this IP?

I'm trying to turn it more flexible so the other can reuse the code.
Looking at the separation you've done here, I don't see why you need
it. All the resources you request are generic, so why not just adding a
new compat in the of_match_table?

I understand your point.

I'm just following what it's done in others Synopsys drivers and what I expect is that in the future we will have the same for the I3C.

Some of the current generic functions might be override according with SoC requirements (e.g i2c-designware, pcie-designware).

for now what do you prefer?

Signed-off-by: Vitor Soares <soares@xxxxxxxxxxxx>
drivers/i3c/master/Kconfig | 9 +-
drivers/i3c/master/Makefile | 5 +-
drivers/i3c/master/dw-i3c-core.h | 214 ++++++++++++++++++++++++++
drivers/i3c/master/dw-i3c-master.c | 299 ++----------------------------------
drivers/i3c/master/dw-i3c-platdrv.c | 112 ++++++++++++++
Just realized the driver is named dw-i3c-master, while the cadence
driver is named i3c-master-cdns.c. I'll send a patch to make that
consistent and follow the initial naming scheme: i3c-master-<ipname>.c.

As I shared with you in previous email, the structure that I have in mind is this one:

- core.h (or common.h, any though?)

- common.c

- master.c

- slave.c

so for me doesn't make sense to have for instance: i3c-master-dw-slave.c

But seeing what is already in the kernel I wasn't coherent and it should be named to i3c-designware-master.c


follow this

This topic rise another one related with the master folder. I understand that now the subsystem doesn't have slave support but the name is limited. Isn't better to have something like controller or busses? What do you have in mind for the slave?

Best regards,

Vitor Soares