From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Boyd Subject: [PATCH 2/3] dt-bindings: pinctrl: Add a ngpios-ranges property Date: Tue, 9 Jan 2018 17:58:47 -0800 Message-ID: <20180110015848.11480-3-sboyd@codeaurora.org> References: <20180110015848.11480-1-sboyd@codeaurora.org> Return-path: In-Reply-To: <20180110015848.11480-1-sboyd@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org To: Linus Walleij Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Timur Tabi , Andy Shevchenko , Bjorn Andersson , linux-gpio@vger.kernel.org, devicetree@vger.kernel.org List-Id: devicetree@vger.kernel.org Some qcom platforms make some GPIOs or pins unavailable for use by non-secure operating systems, and thus reading or writing the registers for those pins will cause access control issues. Introduce a DT property to describe the set of GPIOs that are available for use so that higher level OSes are able to know what pins to avoid reading/writing. Cc: Signed-off-by: Stephen Boyd --- I stuck this inside msm8996, but maybe it can go somewhere more generic? Documentation/devicetree/bindings/pinctrl/qcom,msm8996-pinctrl.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,msm8996-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/qcom,msm8996-pinctrl.txt index aaf01e929eea..8354ab270486 100644 --- a/Documentation/devicetree/bindings/pinctrl/qcom,msm8996-pinctrl.txt +++ b/Documentation/devicetree/bindings/pinctrl/qcom,msm8996-pinctrl.txt @@ -40,6 +40,12 @@ MSM8996 platform. Definition: must be 2. Specifying the pin number and flags, as defined in +- ngpios-ranges: + Usage: optional + Value type: + Definition: Tuples of GPIO ranges (base, size) indicating + GPIOs available for use. + Please refer to ../gpio/gpio.txt and ../interrupt-controller/interrupts.txt for a general description of GPIO and interrupt bindings. -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project