From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Hung Subject: Re: [PATCH V2 1/4] mfd: f81504-core: Add Fintek F81504/508/512 PCIE-to-UART/GPIO core support Date: Fri, 29 Jan 2016 10:22:20 +0800 Message-ID: <56AACCDC.8020306@gmail.com> References: <1453972838-30268-1-git-send-email-hpeter+linux_kernel@gmail.com> <1453972838-30268-2-git-send-email-hpeter+linux_kernel@gmail.com> <20160128100447.00cffae7@lxorguk.ukuu.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20160128100447.00cffae7@lxorguk.ukuu.org.uk> Sender: linux-kernel-owner@vger.kernel.org To: One Thousand Gnomes Cc: linus.walleij@linaro.org, gnurou@gmail.com, gregkh@linuxfoundation.org, andriy.shevchenko@linux.intel.com, paul.gortmaker@windriver.com, lee.jones@linaro.org, jslaby@suse.com, peter_hong@fintek.com.tw, heikki.krogerus@linux.intel.com, peter@hurleysoftware.com, soeren.grunewald@desy.de, udknight@gmail.com, adam.lee@canonical.com, arnd@arndb.de, manabian@gmail.com, scottwood@freescale.com, yamada.masahiro@socionext.com, paul.burton@imgtec.com, mans@mansr.com, matthias.bgg@gmail.com, ralf@linux-mips.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-serial@vger.kernel.org, tom_tsai@fintek.com.tw, Peter Hung List-Id: linux-serial@vger.kernel.org Hi Alan, One Thousand Gnomes =E6=96=BC 2016/1/28 =E4=B8=8B=E5=8D=88 06:04 =E5=AF= =AB=E9=81=93: >> + Please bulit-in kernel if you need early console support. > This driver needs to be built into the kernel to use early console > support. > ok >> + switch (dev->device) { >> + case FINTEK_F81504: /* 4 ports */ >> + /* F81504 max 2 sets of GPIO, others are max 6 sets*/ >> + gpio_en &=3D 0x03; >> + case FINTEK_F81508: /* 8 ports */ >> + max_port =3D dev->device & 0xff; > > If that is meant to fall through from F81504 into F81508 it's worth > commenting, otherwise someone reviewing the code can't always be sure= it > was intentional. ok, I'll add comments to describe this. >> + /* Get the UART IO address dispatch from the BIOS */ >> + pci_read_config_dword(dev, 0x24, &bar_data[0]); >> + pci_read_config_dword(dev, 0x20, &bar_data[1]); >> + pci_read_config_dword(dev, 0x1c, &bar_data[2]); > > Take these from the pci device itself. On some non PC platforms the > values in the pci bar may be remapped by bridges and not give you the > true answer. > > pci_resource_start(dev, barnumber) > Thanks for point this out, I'll rewrite here with pci_resource_start(). --=20 With Best Regards, Peter Hung