linux-kernel - [PATCH v2 0/3] clk: spacemit: refactor common ccu driver

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Message-Id: <20251226-06-k1-clk-common-v2-0-28b59418b4df@gentoo.org>
Date: Fri, 26 Dec 2025 14:55:24 +0800
From: Yixun Lan <dlan@...too.org>
To: Stephen Boyd <sboyd@...nel.org>, 
 Michael Turquette <mturquette@...libre.com>, 
 Philipp Zabel <p.zabel@...gutronix.de>
Cc: Alex Elder <elder@...cstar.com>, Guodong Xu <guodong@...cstar.com>, 
 Inochi Amaoto <inochiama@...il.com>, linux-kernel@...r.kernel.org, 
 linux-clk@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 spacemit@...ts.linux.dev, Yixun Lan <dlan@...too.org>, Yao Zi <me@...ao.cc>
Subject: [PATCH v2 0/3] clk: spacemit: refactor common ccu driver

The goal here is to refactor the clock driver to extract common part, and
reuse it, so in the future, we can maximize the source code usage once
adding new clock driver (specifically, for the SpacemiT K3 SoC here)

Since reset driver register via auxiliary bus which requires a adjustment
of the auxiliary device id accordingly.

This patch will depend on Kconfig fix for building modules [1], and the idea
come from K3 clock's review[2]

Please note, Patch 1 is needed for both clock and reset driver, so extract it
out as single independent patch. Then it can be pulled into both subsystem.

Link: https://lore.kernel.org/all/20251219012819.440972-1-inochiama@gmail.com/ [1]
Link: https://lore.kernel.org/all/aTo8sCPpVM1o9PKX@pie [2]
Signed-off-by: Yixun Lan <dlan@...too.org>
---
Changes in v2:
- extract common header file which shared by clock and reset
- add SoC namespace to differentiate reset for auxiliary bus
- Link to v1: https://lore.kernel.org/r/20251220-06-k1-clk-common-v1-0-df28a0a91621@gentoo.org

---
Yixun Lan (3):
      clk: spacemit: prepare common ccu header
      clk: spacemit: extract common ccu functions
      reset: spacemit: fix auxiliary device id

 drivers/clk/spacemit/ccu-k1.c     | 188 ++------------------------------------
 drivers/clk/spacemit/ccu_common.c | 171 ++++++++++++++++++++++++++++++++++
 drivers/clk/spacemit/ccu_common.h |  10 ++
 drivers/reset/reset-spacemit.c    |   2 +-
 include/soc/spacemit/ccu.h        |  21 +++++
 include/soc/spacemit/k1-syscon.h  |  13 +--
 6 files changed, 213 insertions(+), 192 deletions(-)
---
base-commit: 99735a742f7e9a3e7f4cb6c58edf1b38101e7657
change-id: 20251217-06-k1-clk-common-8d1c57995047
prerequisite-message-id: 20251219012819.440972-1-inochiama@...il.com
prerequisite-patch-id: df430730ed961011cee5c5d47b7ace84b3c5ebb7
prerequisite-patch-id: 64003618c33be925602e46b7543f2c13d3f36474

Best regards,
-- 
Yixun Lan