From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Boyd Subject: [PATCHv2 0/3] OF phandle nexus support + GPIO nexus Date: Tue, 17 Jan 2017 16:50:35 -0800 Message-ID: <20170118005038.9216-1-stephen.boyd@linaro.org> Return-path: Received: from mail-pf0-f180.google.com ([209.85.192.180]:35719 "EHLO mail-pf0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751745AbdARAul (ORCPT ); Tue, 17 Jan 2017 19:50:41 -0500 Received: by mail-pf0-f180.google.com with SMTP id f144so65936646pfa.2 for ; Tue, 17 Jan 2017 16:50:41 -0800 (PST) Sender: linux-gpio-owner@vger.kernel.org List-Id: linux-gpio@vger.kernel.org To: Rob Herring , Frank Rowand Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-gpio@vger.kernel.org, Pantelis Antoniou , Linus Walleij , Mark Brown This is one small chunk of work related to DT overlays for expansion boards. It would be good to have a way to expose #-cells types of providers through a connector in a standard way. So we introduce a way to make "nexus" nodes for these types of properties to remap the consumer number space to the other side of the connector's number space. It's basically a copy of the interrupt nexus implementation, but without the address space matching design and interrupt-parent walking. The first patch implements a generic method to do this, and the second patch adds a unit test for it. The third patch is more of an example than anything else. It shows how we would modify frameworks to use the new API. I wasn't certain what more to document, but I Changes since v1: * Addition of optional pass-thru parameter * Reduction of strings passed to 1 instead of 3 (or 4 now) * Updated gpio patch for the new function signature * Updated test-case for new funciton signature and pass-thru parameter * Updated kernel-doc to be correct and highlighted difference between this API and of_parse_phandle_with_args() Stephen Boyd (3): of: Support parsing phandle argument lists through a nexus node of: unittest: Add phandle remapping test gpio: Support gpio nexus dt bindings drivers/gpio/gpiolib-of.c | 4 +- drivers/of/base.c | 186 ++++++++++++++++++++++++++++ drivers/of/unittest-data/testcases.dts | 11 ++ drivers/of/unittest-data/tests-phandle.dtsi | 25 ++++ drivers/of/unittest.c | 120 ++++++++++++++++++ include/linux/of.h | 12 ++ 6 files changed, 356 insertions(+), 2 deletions(-) -- 2.10.0.297.gf6727b0