From mboxrd@z Thu Jan 1 00:00:00 1970 From: sameo@linux.intel.com (Samuel Ortiz) Date: Fri, 29 Jun 2012 16:55:03 +0200 Subject: [PATCH 03/15] mfd: Make MFD core code Device Tree and IRQ domain aware In-Reply-To: <1340197011-5435-4-git-send-email-lee.jones@linaro.org> References: <1340197011-5435-1-git-send-email-lee.jones@linaro.org> <1340197011-5435-4-git-send-email-lee.jones@linaro.org> Message-ID: <20120629145503.GF22806@sortiz-mobl> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Lee, On Wed, Jun 20, 2012 at 01:56:39PM +0100, Lee Jones wrote: > 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 > Signed-off-by: Lee Jones > --- > 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 ? Cheers, Samuel. -- Intel Open Source Technology Centre http://oss.intel.com/