linux-kernel - Re: [PATCH v2 0/3] pinctrl/broxton: enable platform device in the absent of ACPI enumeration

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Message-ID: <1461671966.17131.63.camel@linux.intel.com>
Date:	Tue, 26 Apr 2016 14:59:26 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Tan Jui Nee <jui.nee.tan@...el.com>,
	mika.westerberg@...ux.intel.com, heikki.krogerus@...ux.intel.com,
	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, ptyser@...-inc.com, lee.jones@...aro.org
Cc:	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
	jonathan.yong@...el.com, ong.hock.yu@...el.com,
	weifeng.voon@...el.com, wan.ahmad.zainie.wan.mohamad@...el.com
Subject: Re: [PATCH v2 0/3] pinctrl/broxton: enable platform device in the
 absent of ACPI enumeration

On Tue, 2016-04-26 at 14:09 +0800, Tan Jui Nee wrote:
> Hi,
> The patches are to cater the need for non-ACPI system whereby
> a platform device has to be created in order to bind with
> Apollo Lake Pinctrl GPIO platform driver.
> 
> The MMIO BAR is accessed over the Primary to Sideband bridge
> (P2SB). Since the BIOS prevents the P2SB device from being
> enumerated by the PCI subsystem, so we need to hide/unhide P2SB
> to lookup the P2SB BAR and pass the PCI BAR address to the gpio
> platform driver.
> 
> All these three patches have dependencies on each other.
> 

Lee, Linus, I'm fine with the series, though I doubt which solution is
better to have the original driver independent as much as possible from
p2sb.

> Changes from V1:
> 	- Add new config option CONFIG_X86_INTEL_NON_ACPI and "select
> PINCTRL"
> 	  to fix kbuildbot error
> 
> Andy Shevchenko (1):
>   x86/platform/p2sb: New Primary to Sideband bridge support driver for
>     Intel SOC's
> 
> Tan Jui Nee (2):
>   pinctrl/broxton: enable platform device in the absent of ACPI
>     enumeration
>   mfd: lpc_ich: Add support for Intel Apollo Lake GPIO pinctrl in
>     non-ACPI system
> 
>  arch/x86/Kconfig                        |  14 ++++
>  arch/x86/include/asm/p2sb.h             |  27 +++++++
>  arch/x86/platform/intel/Makefile        |   1 +
>  arch/x86/platform/intel/p2sb.c          |  99
> ++++++++++++++++++++++++
>  drivers/mfd/Kconfig                     |   3 +-
>  drivers/mfd/lpc_ich.c                   | 128
> ++++++++++++++++++++++++++++++++
>  drivers/pinctrl/intel/pinctrl-broxton.c |  43 ++++++++---
>  7 files changed, 302 insertions(+), 13 deletions(-)
>  create mode 100644 arch/x86/include/asm/p2sb.h
>  create mode 100644 arch/x86/platform/intel/p2sb.c
> 

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy