linux-kernel - [PATCH v2 0/2] Fix orphan clocks in clk-th1520-ap driver

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Message-ID: <20250710092135.61049-1-ziyao@disroot.org>
Date: Thu, 10 Jul 2025 09:21:33 +0000
From: Yao Zi <ziyao@...root.org>
To: Drew Fustini <fustini@...nel.org>,
	Guo Ren <guoren@...nel.org>,
	Fu Wei <wefu@...hat.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Jisheng Zhang <jszhang@...nel.org>,
	Yangtao Li <frank.li@...o.com>
Cc: linux-riscv@...ts.infradead.org,
	linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Yao Zi <ziyao@...root.org>
Subject: [PATCH v2 0/2] Fix orphan clocks in clk-th1520-ap driver

clk_orphan_dump shows two suspicious orphan clocks on TH1520 when
booting the kernel with mainline U-Boot,

        $ cat /sys/kernel/debug/clk/clk_orphan_dump | jq 'keys'
        [
          "c910",
          "osc_12m"
        ]

where the correct parents should be c910-i0 for c910, and osc_24m for
osc_12m.

Note that the c910's case cannot be reproduced with vendor U-Boot,
which always reparents c910 to its second parent, cpu-pll1. Another way
to confirm the bug is to examine
/sys/kernel/debug/clk/c910/clk_possible_parents, which obviously doesn't
match c910's definition.

This series corrects the parent description of these two clocks to
eliminate the orphans.

Changed from v1
- Split the two fixes into separate patches
- Add a static qualifier for the new definition of osc_12m
- Link to v1: https://lore.kernel.org/all/20250705052028.24611-1-ziyao@disroot.org/

Thanks for your time and review.

Yao Zi (2):
  clk: thead: th1520-ap: Correctly refer the parent of osc_12m
  clk: thead: th1520-ap: Correctly refer the parent of c910-i0

 drivers/clk/thead/clk-th1520-ap.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

-- 
2.50.0