Message-Id: <20220208010048.211691-1-aidanmacdonald.0x0@gmail.com>
Date:   Tue,  8 Feb 2022 01:00:45 +0000
From:   Aidan MacDonald <aidanmacdonald.0x0@...il.com>
To:     paul@...pouillou.net, mturquette@...libre.com, sboyd@...nel.org
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] Clock fixes for Ingenic SoCs

I ran across a problem trying to get Linux running on an Ingenic X1000 SoC:
since the memory clock isn't referenced by any driver, it appears unused and
gets disabled automatically. After that, the system hangs on any RAM access.

There is a hack in board-ingenic.c to forcibly enable the CPU clock, but this
is insufficient for the X1000 since the memory clock has its own gate and mux
that isn't tied to the CPU.

This patch series fixes the bug by adding CLK_IS_CRITICAL flags to important
clocks, which seems to be the approach used in many other SoC clock drivers.

It's my first time submitting patches to the kernel so let me know if I
messed anything up.

Aidan MacDonald (3):
  clk: ingenic: Allow specifying common clock flags
  clk: ingenic: Mark critical clocks in Ingenic SoCs
  mips: ingenic: Do not manually reference the CPU clock

 arch/mips/generic/board-ingenic.c | 26 --------------------------
 drivers/clk/ingenic/cgu.c         |  2 +-
 drivers/clk/ingenic/cgu.h         |  3 +++
 drivers/clk/ingenic/jz4725b-cgu.c |  2 ++
 drivers/clk/ingenic/jz4740-cgu.c  |  2 ++
 drivers/clk/ingenic/jz4760-cgu.c  |  2 ++
 drivers/clk/ingenic/jz4770-cgu.c  |  1 +
 drivers/clk/ingenic/jz4780-cgu.c  |  3 +++
 drivers/clk/ingenic/x1000-cgu.c   |  3 +++
 drivers/clk/ingenic/x1830-cgu.c   |  3 +++
 10 files changed, 20 insertions(+), 27 deletions(-)

-- 
2.34.1

Powered by blists - more mailing lists