linux-kernel - Re: [PATCH 1/2] mfd: intel-m10-bmc: add Max10 BMC chip support for Intel FPGA PAC

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Date:   Tue, 14 Jul 2020 07:50:43 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Xu Yilun <yilun.xu@...el.com>
Cc:     linux-kernel@...r.kernel.org, trix@...hat.com,
        matthew.gerlach@...ux.intel.com, russell.h.weight@...el.com,
        lgoncalv@...hat.com, Wu Hao <hao.wu@...el.com>
Subject: Re: [PATCH 1/2] mfd: intel-m10-bmc: add Max10 BMC chip support for
 Intel FPGA PAC

On Tue, 14 Jul 2020, Xu Yilun wrote:

> On Mon, Jul 13, 2020 at 10:17:08AM +0100, Lee Jones wrote:
> > On Mon, 13 Jul 2020, Xu Yilun wrote:
> > 
> > > This patch implements the basic functions of the BMC chip for some Intel
> > > FPGA PCIe Acceleration Cards (PAC). The BMC is implemented using the
> > > intel max10 CPLD.
> > > 
> > > This BMC chip is connected to FPGA by a SPI bus. To provide reliable
> > > register access from FPGA, an Avalon Memory-Mapped (Avmm) transaction
> > > protocol over the SPI bus is used between host and slave.
> > > 
> > > This driver implements the basic register access with the regmap framework.
> > > The mfd cells array is empty now as a placeholder.
> > > 
> > > Signed-off-by: Xu Yilun <yilun.xu@...el.com>
> > > Signed-off-by: Wu Hao <hao.wu@...el.com>
> > > Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> > > Signed-off-by: Russ Weight <russell.h.weight@...el.com>
> > > Signed-off-by: Tom Rix <trix@...hat.com>
> > > ---
> > >  .../ABI/testing/sysfs-driver-intel-m10-bmc         |  15 +
> > >  drivers/mfd/Kconfig                                |  13 +
> > >  drivers/mfd/Makefile                               |   3 +
> > >  drivers/mfd/intel-m10-bmc-main.c                   | 176 ++++
> > 
> > >  drivers/mfd/intel-spi-avmm.c                       | 904 +++++++++++++++++++++
> > 
> > This does not belong in MFD.
> > 
> > Please consider moving it to drivers/spi.
> 
> OK, I could make the intel-spi-avmm.c as a separate module in other
> folder.
> 
> Since it is an implementation of regmap, is it better we move it to
> drivers/base/regmap?

Either way, you need to speak to Mark Brown.

> > >  drivers/mfd/intel-spi-avmm.h                       |  35 +
> > >  include/linux/mfd/intel-m10-bmc.h                  |  57 ++
> > >  7 files changed, 1203 insertions(+)
> > >  create mode 100644 Documentation/ABI/testing/sysfs-driver-intel-m10-bmc
> > >  create mode 100644 drivers/mfd/intel-m10-bmc-main.c
> > >  create mode 100644 drivers/mfd/intel-spi-avmm.c
> > >  create mode 100644 drivers/mfd/intel-spi-avmm.h
> > >  create mode 100644 include/linux/mfd/intel-m10-bmc.h
> > 

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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