[v2,0/5] Remove LPC register partitioning

The LPC controller has no concept of the BMC and the Host partitions.
The incorrect partitioning can impose unnecessary range restrictions
on register access through the syscon regmap interface.

For instance, HICRB contains the I/O port address configuration
of KCS channel 1/2. However, the KCS#1/#2 drivers cannot access
HICRB as it is located at the other LPC partition.

In addition, to be backward compatible, the newly added HW control
bits could be located at any reserved bits over the LPC addressing
space.

Thereby, this patch series aims to remove the LPC partitioning for
better driver development and maintenance.


Changes since v1:
	- Add the fix to the aspeed-lpc binding documentation.

Chia-Wei, Wang (5):
  ARM: dts: Remove LPC BMC and Host partitions
  soc: aspeed: Fix LPC register offsets
  ipmi: kcs: aspeed: Fix LPC register offsets
  pinctrl: aspeed-g5: Fix LPC register offsets
  dt-bindings: aspeed-lpc: Remove LPC partitioning

 .../devicetree/bindings/mfd/aspeed-lpc.txt    |  85 ++---------
 arch/arm/boot/dts/aspeed-g4.dtsi              |  74 ++++------
 arch/arm/boot/dts/aspeed-g5.dtsi              | 135 ++++++++----------
 arch/arm/boot/dts/aspeed-g6.dtsi              | 135 ++++++++----------
 drivers/char/ipmi/kcs_bmc_aspeed.c            |  13 +-
 drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c    |   2 +-
 drivers/soc/aspeed/aspeed-lpc-ctrl.c          |   6 +-
 drivers/soc/aspeed/aspeed-lpc-snoop.c         |  11 +-
 8 files changed, 176 insertions(+), 285 deletions(-)

Hi All,

Do you have any comment on the v2 changes?
Thanks.

Chiawei

> -----Original Message-----
> From: ChiaWei Wang <chiawei_wang@aspeedtech.com>
> Sent: Monday, October 5, 2020 4:28 PM
> To: lee.jones@linaro.org; robh+dt@kernel.org; joel@jms.id.au;
> andrew@aj.id.au; minyard@acm.org; arnd@arndb.de;
> gregkh@linuxfoundation.org; linus.walleij@linaro.org;
> haiyue.wang@linux.intel.com; cyrilbur@gmail.com; rlippert@google.com;
> linux-arm-kernel@lists.infradead.org; linux-aspeed@lists.ozlabs.org;
> linux-kernel@vger.kernel.org; openbmc@lists.ozlabs.org;
> linux-gpio@vger.kernel.org
> Subject: [PATCH v2 0/5] Remove LPC register partitioning
> 
> The LPC controller has no concept of the BMC and the Host partitions.
> The incorrect partitioning can impose unnecessary range restrictions on
> register access through the syscon regmap interface.
> 
> For instance, HICRB contains the I/O port address configuration of KCS channel
> 1/2. However, the KCS#1/#2 drivers cannot access HICRB as it is located at the
> other LPC partition.
> 
> In addition, to be backward compatible, the newly added HW control bits could
> be located at any reserved bits over the LPC addressing space.
> 
> Thereby, this patch series aims to remove the LPC partitioning for better driver
> development and maintenance.
> 
> 
> Changes since v1:
> 	- Add the fix to the aspeed-lpc binding documentation.
> 
> Chia-Wei, Wang (5):
>   ARM: dts: Remove LPC BMC and Host partitions
>   soc: aspeed: Fix LPC register offsets
>   ipmi: kcs: aspeed: Fix LPC register offsets
>   pinctrl: aspeed-g5: Fix LPC register offsets
>   dt-bindings: aspeed-lpc: Remove LPC partitioning
> 
>  .../devicetree/bindings/mfd/aspeed-lpc.txt    |  85 ++---------
>  arch/arm/boot/dts/aspeed-g4.dtsi              |  74 ++++------
>  arch/arm/boot/dts/aspeed-g5.dtsi              | 135 ++++++++----------
>  arch/arm/boot/dts/aspeed-g6.dtsi              | 135 ++++++++----------
>  drivers/char/ipmi/kcs_bmc_aspeed.c            |  13 +-
>  drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c    |   2 +-
>  drivers/soc/aspeed/aspeed-lpc-ctrl.c          |   6 +-
>  drivers/soc/aspeed/aspeed-lpc-snoop.c         |  11 +-
>  8 files changed, 176 insertions(+), 285 deletions(-)
> 
> --
> 2.17.1

On Tue, 20 Oct 2020, at 16:33, ChiaWei Wang wrote:
> Hi All,
> 
> Do you have any comment on the v2 changes?
> Thanks.
> 

Hmm, seems I'm missing patches 3/5 and 4/5 from my inbox. Weird.

Anyway, sorry for the delay, I'm looking at them now.

Andrew