From: Pratyush Anand <pratyush.anand@st.com>
To: Mohit KUMAR DCG <Mohit.KUMAR@st.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
spear-devel <spear-devel@list.st.com>,
Viresh Kumar <viresh.linux@gmail.com>
Subject: Re: [PATCH 02/12] SPEAr13xx: Move SPEAr1340 definitions to header file
Date: Thu, 16 Jan 2014 14:49:08 +0530 [thread overview]
Message-ID: <20140116091908.GC2290@pratyush-vbox> (raw)
In-Reply-To: <2CC2A0A4A178534D93D5159BF3BCB66189FBE8D5D6@EAPEX1MAIL1.st.com>
On Thu, Jan 16, 2014 at 03:25:41PM +0800, Mohit KUMAR DCG wrote:
> Hi Arnd,
>
>
> > -----Original Message-----
> > From: Arnd Bergmann [mailto:arnd@arndb.de]
> > Sent: Sunday, December 15, 2013 12:33 AM
> > To: Mohit KUMAR DCG
> > Cc: linux-arm-kernel@lists.infradead.org; linux-pci@vger.kernel.org;
> > Pratyush ANAND; spear-devel; Viresh Kumar
> > Subject: Re: [PATCH 02/12] SPEAr13xx: Move SPEAr1340 definitions to
> > header file
> >
> > On Friday 13 December 2013, Mohit KUMAR DCG wrote:
> > > > The RST bits should probably go into a drivers/reset driver. Not
> > > > sure what the other registers do, but I'm sure we can find a driver
> > > > for these too, possibly they should be part of the PHY driver?
> > >
> > > - Perhaps if we implement phy and reset driver then we may not
> > > require to move these definitions and it will address most of your
> > > comments on SPEar13xx pcie driver. I am understanding and working on
> > > this.l
> > >
>
> Though we are almost ready with v2. But few concerns:
>
> There are Spear soc common register used for misc configurations of clock, reset etc for all ips. Few of
> registers from the same area are also used for pcie/sata muxing and auxiliary clock configurations.
> For example: sata_miphy_init in arch/arm/mach-spear/spear1340.c also uses these registers.
>
> We have moved all these sata specific spear1340 configurations in a separate driver. On the basis of spear-ahci dt
> Node this driver's probe is called, which further adds ahci platform driver.
> We plan to put all spear1340/1310_pcie_miphy_init/exit functions of patch 9/12 of this series in
> The same driver.
>
> Now our concern is, what could be the best place to keep that driver, phy, reset or any other framework?
> Or we keep this new driver in arch/arm/mach-spear only.
I think this misc configuration register block resource should be
passed to syscon (drivers/mfd/syscon.c) driver.
regmap_update_bits should be used to update these registers and hence
to configure pcie/sata settings.
As far as place is concerned, that can be kept into mfd and can be
named as spear13xx-syscon.c
Whats your opinion arnd?
Regards
Pratyush
>
> Regards
> Mohit
>
> >
> > Ok, very good.
> >
> > Arnd
next prev parent reply other threads:[~2014-01-16 9:19 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-11 9:38 [PATCH 00/12] PCI:Add SPEAr13xx PCie support Mohit Kumar
2013-12-11 9:38 ` [PATCH 01/12] SPEAr13xx: Correct dt field name for stmmac phy-addr Mohit Kumar
2013-12-11 11:09 ` Rajeev kumar
2013-12-11 11:14 ` Rajeev kumar
2013-12-12 0:39 ` Jingoo Han
2013-12-12 3:59 ` Rajeev kumar
2013-12-12 4:07 ` Chen-Yu Tsai
2013-12-12 5:13 ` Mohit KUMAR DCG
2013-12-11 9:38 ` [PATCH 02/12] SPEAr13xx: Move SPEAr1340 definitions to header file Mohit Kumar
2013-12-11 22:48 ` Arnd Bergmann
2013-12-13 4:18 ` Mohit KUMAR DCG
2013-12-14 19:02 ` Arnd Bergmann
2014-01-16 7:25 ` Mohit KUMAR DCG
2014-01-16 9:19 ` Pratyush Anand [this message]
2014-01-16 11:33 ` Arnd Bergmann
2014-01-16 11:45 ` Pratyush Anand
2013-12-11 9:38 ` [PATCH 03/12] SPEAr13xx: Add SPEAr1310 PCIe register definitions Mohit Kumar
2013-12-11 22:51 ` Arnd Bergmann
2013-12-11 9:38 ` [PATCH 04/12] SPEAr13xx: Fix static mapping table Mohit Kumar
2013-12-11 9:38 ` [PATCH 05/12] clk: SPEAr13xx: Fix pcie clock name Mohit Kumar
2013-12-11 22:42 ` Arnd Bergmann
2013-12-12 5:00 ` Mohit KUMAR DCG
2013-12-12 21:30 ` Arnd Bergmann
2013-12-11 9:38 ` [PATCH 06/12] pcie: designware: Move register definition to the header file Mohit Kumar
2013-12-11 11:38 ` Jagan Teki
2013-12-11 11:55 ` Mohit KUMAR DCG
2013-12-11 12:04 ` Jagan Teki
2013-12-11 21:31 ` Arnd Bergmann
2013-12-11 22:48 ` Jingoo Han
2013-12-12 4:55 ` Mohit KUMAR DCG
2013-12-11 9:38 ` [PATCH 07/12] pcie: designware: add dw_pcie prefix before cfg_read/write Mohit Kumar
2013-12-11 11:40 ` Jagan Teki
2013-12-12 1:12 ` Jingoo Han
2013-12-12 1:05 ` Jingoo Han
2013-12-20 16:35 ` Bjorn Helgaas
2013-12-11 9:38 ` [PATCH 08/12] pcie: designware: Fix IO transfers Mohit Kumar
2013-12-11 10:03 ` Marek Vasut
2013-12-11 11:29 ` Jagan Teki
2013-12-12 1:17 ` Jingoo Han
2013-12-20 3:47 ` Pratyush Anand
2013-12-11 13:34 ` Arnd Bergmann
2013-12-11 23:34 ` Jingoo Han
2013-12-20 16:36 ` Bjorn Helgaas
2013-12-11 9:38 ` [PATCH 09/12] pcie: SPEAr13xx: Add designware pcie support Mohit Kumar
2013-12-11 23:00 ` Arnd Bergmann
2013-12-13 4:30 ` Mohit KUMAR DCG
2013-12-13 4:57 ` Jingoo Han
2013-12-14 19:01 ` Arnd Bergmann
2013-12-11 9:38 ` [PATCH 10/12] SPEAr13xx: defconfig: Update Mohit Kumar
2013-12-11 10:47 ` Rajeev kumar
2013-12-12 4:47 ` Mohit KUMAR DCG
2013-12-11 9:38 ` [PATCH 11/12] MAINTAINERS: Add ST SPEAr13xx PCIe driver maintainer Mohit Kumar
2013-12-12 1:55 ` Jingoo Han
2013-12-11 9:38 ` [PATCH 12/12] MAINTAINERS: Add Synopsis Designware " Mohit Kumar
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