[PATCH 02/12] SPEAr13xx: Move SPEAr1340 definitions to header file
pratyush.anand at st.com
Thu Jan 16 04:19:08 EST 2014
On Thu, Jan 16, 2014 at 03:25:41PM +0800, Mohit KUMAR DCG wrote:
> Hi Arnd,
> > -----Original Message-----
> > From: Arnd Bergmann [mailto:arnd at arndb.de]
> > Sent: Sunday, December 15, 2013 12:33 AM
> > To: Mohit KUMAR DCG
> > Cc: linux-arm-kernel at lists.infradead.org; linux-pci at 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?
> > Ok, very good.
> > Arnd
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