linux-kernel - [PATCH V4 0/4] Transform Fintek PCIE driver from 8250 to MFD

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Message-Id: <1456209003-22396-1-git-send-email-hpeter+linux_kernel@gmail.com>
Date:	Tue, 23 Feb 2016 14:29:59 +0800
From:	Peter Hung <hpeter@...il.com>
To:	linus.walleij@...aro.org, gnurou@...il.com,
	gregkh@...uxfoundation.org, andriy.shevchenko@...ux.intel.com,
	paul.gortmaker@...driver.com, lee.jones@...aro.org,
	jslaby@...e.com, gnomes@...rguk.ukuu.org.uk,
	peter_hong@...tek.com.tw
Cc:	heikki.krogerus@...ux.intel.com, peter@...leysoftware.com,
	soeren.grunewald@...y.de, udknight@...il.com,
	adam.lee@...onical.com, arnd@...db.de, manabian@...il.com,
	scottwood@...escale.com, yamada.masahiro@...ionext.com,
	paul.burton@...tec.com, mans@...sr.com, matthias.bgg@...il.com,
	ralf@...ux-mips.org, linux-kernel@...r.kernel.org,
	linux-gpio@...r.kernel.org, linux-serial@...r.kernel.org,
	tom_tsai@...tek.com.tw, Peter Hung <hpeter+linux_kernel@...il.com>
Subject: [PATCH V4 0/4] Transform Fintek PCIE driver from 8250 to MFD

The Fintek F81504/508/512 is a multi-function PCIE devices.
IC function list:
    F81504: Max 2x8 GPIOs and max 4 serial ports
        port2/3 are multi-function
    F81508: Max 6x8 GPIOs and max 8 serial ports
        port2/3 are multi-function, port8/9/10/11 are gpio only
    F81512: Max 6x8 GPIOs and max 12 serial ports
        port2/3/8/9/10/11 are multi-function

It had implemented in 8250_pci.c with basic serial port function.
We want to complete it. Alan & Andy recommend us to rewrite and
spilt our driver with MFD architecture.
https://lkml.org/lkml/2016/1/19/288

Paul recommed us do less code deletion to avoid confusing problem when
bisect.
https://lkml.org/lkml/2016/1/18/646

So we'll do this with following patches.
    1. Add MFD core driver.
    2. Add GPIOLIB driver.
    3. Add serial port driver.
    4. Remove old driver in 8250_pci.c and add it to blacklist

8250_pci.c will still handle the device when patches 1~3. After apply
patch 4, the device will control by F81504 MFD core driver.

Changelog:
V4:
    1. Fix the comment style
    2. Fix the warning (.owner = THIS_MODULE) reported by kbuild bot
       with f81504_core.c & 8250_f81504.c
    3. Remove unused Kconfig option (RATIONAL) with 8250_f81504.c
    4. Remove unused variable (quot/rem) with f81504_check_baudrate()
       in 8250_f81504.c
V3:
    1. Refactoring gpio-f81504.c with new API
       (Suggested by Linus Walleij).
    2. Fix wrong kfree in gpio-f81504.c (Suggested by Andy Shevchenko).
    3. Get PCI resource by pci_resource_start() instead of getting PCI
       resource from BAR of PCI configuration space (Suggested by Alan).

V2:
    1. Split F81504/508/512 from 8250_pci.c to MFD, It'll add 3 new files
       1. drivers/mfd/f81504-core.c
       2. drivers/gpio/gpio-f81504.c
       3. drivers/tty/serial/8250/8250_f81504.c

V1:
    1. Split F81504/508/512 from 8250_pci.c to 8250_fintek_pci.c.
       Alan & Andy recommend me to rewrite as MFD architecture.

Peter Hung (4):
  mfd: f81504-core: Add Fintek F81504/508/512 PCIE-to-UART/GPIO core
    support
  gpio: gpio-f81504: Add Fintek F81504/508/512 PCIE-to-UART/GPIO GPIOLIB
    support
  8250: 8250_f81504: Add Fintek F81504/508/512 PCIE-to-UART/GPIO UART
    support
  serial: 8250_pci: Remove Fintek F81504/508/512 UART driver

 drivers/gpio/Kconfig                  |  10 +
 drivers/gpio/Makefile                 |   1 +
 drivers/gpio/gpio-f81504.c            | 241 ++++++++++++++++++++++++
 drivers/mfd/Kconfig                   |  12 ++
 drivers/mfd/Makefile                  |   2 +
 drivers/mfd/f81504-core.c             | 335 ++++++++++++++++++++++++++++++++++
 drivers/tty/serial/8250/8250_f81504.c | 250 +++++++++++++++++++++++++
 drivers/tty/serial/8250/8250_pci.c    | 206 +--------------------
 drivers/tty/serial/8250/Kconfig       |  10 +
 drivers/tty/serial/8250/Makefile      |   1 +
 include/linux/mfd/f81504.h            |  52 ++++++
 11 files changed, 919 insertions(+), 201 deletions(-)
 create mode 100644 drivers/gpio/gpio-f81504.c
 create mode 100644 drivers/mfd/f81504-core.c
 create mode 100644 drivers/tty/serial/8250/8250_f81504.c
 create mode 100644 include/linux/mfd/f81504.h

-- 
1.9.1