[PATCH -next 0/4] Add LCLK control into Aspeed LPC sub drivers

jae.hyun.yoo at intel.com jae.hyun.yoo at intel.com
Tue Nov 2 10:37:47 AEDT 2021

From: Jae Hyun Yoo <jae.hyun.yoo at linux.intel.com>

Hello all,

This series is for appliying below fix to all Aspped LPC sub drivers.

An LPC sub driver can be enabled without using the lpc-ctrl driver or it
can be registered ahead of lpc-ctrl depends on each system configuration and
this difference introduces that LPC can be enabled without heart beating of
LCLK so it causes improper handling on host interrupts when the host sends
interrupts in that time frame. Then kernel eventually forcibly disables the
interrupt with dumping stack and printing a 'nobody cared this irq' message

To prevent this issue, all LPC sub drivers should enable LCLK individually
so this patch adds clock control logic into the remaining Aspeed LPC sub

Please review this series.


Jae Hyun Yoo (4):
  ARM: dts: aspeed: add LCLK setting into LPC IBT node
  ipmi: bt: add clock control logic
  ARM: dts: aspeed: add LCLK setting into LPC KCS nodes
  ipmi: kcs_bmc_aspeed: add clock control logic

 arch/arm/boot/dts/aspeed-g4.dtsi   |  1 +
 arch/arm/boot/dts/aspeed-g5.dtsi   |  5 +++++
 arch/arm/boot/dts/aspeed-g6.dtsi   |  5 +++++
 drivers/char/ipmi/bt-bmc.c         | 24 ++++++++++++++++++++++-
 drivers/char/ipmi/kcs_bmc_aspeed.c | 31 ++++++++++++++++++++++++++----
 5 files changed, 61 insertions(+), 5 deletions(-)


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