On Sunday, May 22, 2011, Russell King - ARM Linux wrote:
On Sat, May 21, 2011 at 11:42:34AM -0600, Grant Likely wrote:
Russell, it seems to me that the primary behaviour that amba_bus has
over platform_bus is the clock management, and secondarily
verification of the type of device by the
2011/5/22 Arnd Bergmann a...@arndb.de:
On Saturday 21 May 2011 19:42:34 Grant Likely wrote:
1) drop amba-bus entirely and use platform_device everywhere, similar
to what OMAP has done
2) strictly create amba_devices for nodes compatible with arm,amba-device
3) be intelligent about amba device
2011/5/24 Rob Herring robherri...@gmail.com:
I think having arm,amba-deviceid is not needed. The current code does
nothing but warn if it doesn't match the h/w value. The drivers already have
a list of id's that they support and the amba bus only matches against the
h/w id value. The only use
Grant,
On 05/23/2011 10:09 AM, Grant Likely wrote:
On Mon, May 23, 2011 at 3:58 AM, Russell King - ARM Linux
li...@arm.linux.org.uk wrote:
On Mon, May 23, 2011 at 11:37:04AM +0200, Kristoffer Glembo wrote:
Grant Likely wrote:
In the case we're talking about the bus really is an AMBA bus,
On Tue, May 24, 2011 at 10:03:35AM -0500, Rob Herring wrote:
Grant,
On 05/23/2011 10:09 AM, Grant Likely wrote:
On Mon, May 23, 2011 at 3:58 AM, Russell King - ARM Linux
li...@arm.linux.org.uk wrote:
On Mon, May 23, 2011 at 11:37:04AM +0200, Kristoffer Glembo wrote:
Grant Likely wrote:
: [PATCH 2/2] drivers/amba: probe via device tree
On Fri, May 20, 2011 at 09:08:17AM -0700, Stephen Neuendorffer wrote:
That is how it is currently, but the reality is that I only have 1
bus
with both ARM Primecell peripherals and other peripherals which
are
standard platform bus devices. i2c
On Mon, May 23, 2011 at 3:58 AM, Russell King - ARM Linux
li...@arm.linux.org.uk wrote:
On Mon, May 23, 2011 at 11:37:04AM +0200, Kristoffer Glembo wrote:
Grant Likely wrote:
In the case we're talking about the bus really is an AMBA bus, and all
the devices on it are in some sense real amba
On Mon, May 23, 2011 at 08:00:15AM -0700, Stephen Neuendorffer wrote:
To be specific (whether this is 'to shreds' or not, you can decide).
1. amba_bus expects the old ARM primcell ID. The one in the new A9 IP
appears to be different. (b105900d instead of b105f00d)
Ok, so we can update to
On Saturday 21 May 2011 19:42:34 Grant Likely wrote:
1) drop amba-bus entirely and use platform_device everywhere, similar
to what OMAP has done
2) strictly create amba_devices for nodes compatible with arm,amba-device
3) be intelligent about amba device creation; create an amba_device
only
On 05/21/2011 06:47 PM, Russell King - ARM Linux wrote:
On Sat, May 21, 2011 at 11:42:34AM -0600, Grant Likely wrote:
Russell, it seems to me that the primary behaviour that amba_bus has
over platform_bus is the clock management, and secondarily
verification of the type of device by the device
On 05/20/2011 11:00 PM, Segher Boessenkool wrote:
The ARM definition of AMBA encompasses a lot of things. It is the
definition of the AXI, AHB and APB buses.
So the device tree, which describes the hardware, should call the buses
axi, ahb or apb as appropriate, and describe the actual physical
Identifying actual AMBA devices is already done. The question is how
to scan the tree for them and how that relates to regular platform
devices. The AMBA devices have a binding like this:
compatible = arm,pl011, arm,amba-device;
arm,amba-deviceid = 0x00341011;
Excellent -- so you just find
-
discuss-bounces+stephen.neuendorffer=xilinx@lists.ozlabs.org] On
Behalf Of Rob Herring
Sent: Friday, May 20, 2011 8:18 AM
To: Arnd Bergmann
Cc: devicetree-discuss@lists.ozlabs.org; Jeremy Kerr;
linux-arm-ker...@lists.infradead.org
Subject: Re: [PATCH 2/2] drivers/amba: probe via device tree
On Sat, May 21, 2011 at 9:18 AM, Segher Boessenkool
seg...@kernel.crashing.org wrote:
Identifying actual AMBA devices is already done. The question is how to
scan the tree for them and how that relates to regular platform devices. The
AMBA devices have a binding like this:
compatible =
On Sat, May 21, 2011 at 11:42:34AM -0600, Grant Likely wrote:
Russell, it seems to me that the primary behaviour that amba_bus has
over platform_bus is the clock management, and secondarily
verification of the type of device by the device id. Am I correct, or
am I missing something?
It
On Friday 20 May 2011 15:24:26 Rob Herring wrote:
Maybe we are looking this in the wrong way.
AMBA is not really the bus, but certain types of devices on the bus.
Granted, it may actually be an AMBA bus vs. vendor bus (i.MX AIPS), but
that is really transparent to s/w. Separating AMBA
Arnd,
On 05/20/2011 09:21 AM, Arnd Bergmann wrote:
On Friday 20 May 2011 15:24:26 Rob Herring wrote:
Maybe we are looking this in the wrong way.
AMBA is not really the bus, but certain types of devices on the bus.
Granted, it may actually be an AMBA bus vs. vendor bus (i.MX AIPS), but
that is
-discuss@lists.ozlabs.org; Jeremy Kerr;
linux-arm-ker...@lists.infradead.org
Subject: Re: [PATCH 2/2] drivers/amba: probe via device tree
Arnd,
On 05/20/2011 09:21 AM, Arnd Bergmann wrote:
On Friday 20 May 2011 15:24:26 Rob Herring wrote:
Maybe we are looking this in the wrong way.
AMBA
The ARM definition of AMBA encompasses a lot of things. It is the
definition of the AXI, AHB and APB buses.
So the device tree, which describes the hardware, should call the buses
axi, ahb or apb as appropriate, and describe the actual physical
connections.
The Linux kernel is free to ignore
On Thu, May 19, 2011 at 01:28:24PM -0500, Rob Herring wrote:
From: Rob Herring rob.herr...@calxeda.com
Add functions to parse the AMBA bus through the device tree.
Based on the original version by Jeremy Kerr. This reworks the original amba
bus device tree probing to be more inline with
Grant,
On 05/19/2011 03:01 PM, Grant Likely wrote:
On Thu, May 19, 2011 at 01:28:24PM -0500, Rob Herring wrote:
From: Rob Herringrob.herr...@calxeda.com
Add functions to parse the AMBA bus through the device tree.
Based on the original version by Jeremy Kerr. This reworks the original amba
On Thu, May 19, 2011 at 06:30:23PM -0500, Rob Herring wrote:
Grant,
On 05/19/2011 03:01 PM, Grant Likely wrote:
On Thu, May 19, 2011 at 01:28:24PM -0500, Rob Herring wrote:
From: Rob Herringrob.herr...@calxeda.com
Add functions to parse the AMBA bus through the device tree.
Based on
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