[RFC PATCH v3 3/9] clk: renesas: add R906G032 driver

Marek Vasut marek.vasut at mailbox.org
Wed Feb 22 18:47:44 CET 2023

On 2/22/23 18:21, Ralph Siemsen wrote:
> On Wed, Feb 22, 2023 at 06:07:45PM +0100, Marek Vasut wrote:
>> On 2/22/23 17:57, Ralph Siemsen wrote:
>>> On Wed, Feb 22, 2023 at 05:06:14PM +0100, Marek Vasut wrote:
>>>> On 2/22/23 16:44, Ralph Siemsen wrote:
>>>>> Clock driver for the Renesas RZ/N1 SoC family. This is based
>>>>> on the Linux kernel drivers/clk/renesas/r9a06g032-clocks.c.
>>>> For starters, can you please include the exact kernel version , 
>>>> ideally commit ID, from which this way pulled, so that future 
>>>> updates can pull in the diffs from that commit easily ?
>>> Very reasonable request, but a bit difficult to give a concise 
>>> answer. Originally I took the driver as found in the 5.15 kernel. The 
>>> driver actually had not changed since 5.13 commit 6bd913f54f2f ("clk: 
>>> renesas: r9a06g032: Switch to .determine_rate()"). So that's the 
>>> starting point.
>>> I incorporated subsequent changes to the clock tables and related 
>>> cleanups. Those were only merged into Linux much later:
>>> 2dee50ab9e72 clk: renesas: r9a06g032: Fix UART clkgrp bitsel
>>> f46efcc4746f clk: renesas: r9a06g032: Drop some unused fields
>>> 2a6da4a11f47 clk: renesas: r9a06g032: Fix the RTC hclock description
>>> Linux driver also had a few other commits, but these are not 
>>> applicable to the u-boot version due to structural changes:
>>> 6bd913f54f2f clk: renesas: r9a06g032: Switch to .determine_rate()
>>> f2fb4fe62390 clk: renesas: Zero init clk_init_data
>>> 2182066d95c3 clk: renesas: r9a06g032: Probe possible children
>>> 885525c1e7e2 clk: renesas: r9a06g032: Export function to set dmamux
>>> 02693e11611e clk: renesas: r9a06g032: Repair grave increment error
>>> So I would say it is "up to date" with the lastest Linux commit, even 
>>> though it is based on an earlier version. Is there a good way to 
>>> include the above in the commit message, succinctly?
>> Is this still in sync with Linux 6.1.y ? That's the latest LTS .
> Yes. Although the commits have different hashes than what I reported 
> above, the 6.1.y LTS branch has the same changes.

Then please include the Linux 6.1.y commit ID , or Torvalds' tree if 
that contains new fixes . Let's not use some old/downstream stuff .

> Note that the u-boot version of the driver has changed considerably from 
> the Linux version. In terms of pulling future diffs over, I would be 
> concerned mostly about keeping the clock tables in sync. There have been 
> a few mistakes found and fixed in those already.

Are those fixes in mainline Linux ?

More information about the U-Boot mailing list