On 29/06/12 15:55, Samuel Ortiz wrote:

Hi Lee,

On Wed, Jun 20, 2012 at 01:56:39PM +0100, Lee Jones wrote:

quoted

During Device Tree enablement of the ab8500 and db8500-prcmu drivers,
a decision was made to omit registration through the MFD API and use
Device Tree directly. However, because MFD devices have a different
address space and the ab8500 and db8500 both use I2C to communicate,
this causes issues with address translation during execution of
of_platform_populate(). So the solution is to make the MFD core aware
of Device Tree and have it assign the correct node pointers instead.

To make this work the MFD core also needs to be awere of IRQ domains,
as Device Tree insists on IRQ domain compatibility. So, instead of
providing an irq-base via platform code, in the DT case we simply
look up the IRQ domain and map to the correct virtual IRQ.

Cc: Samuel Ortiz <redacted>
Signed-off-by: Lee Jones <redacted>
---
  drivers/mfd/mfd-core.c   |   31 +++++++++++++++++++++++++++----
  include/linux/mfd/core.h |    1 +
  2 files changed, 28 insertions(+), 4 deletions(-)

Applied, after changing the code style a bit to make it more readable.
Could you please provide me with a follow up patch for documenting the
of_compatible MFD cell field, please ?

Yes, of course.

What exactly would you like? Something in Documentation/devicetree you 
mean? Or something else?

Kind regards,
Lee

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
M: +44 77 88 633 515
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