linux-kernel - [PATCH 4.19 034/142] arm64: dts: sdm845-mtp: Reserve reserved gpios

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Message-Id: <20181214115748.413523058@linuxfoundation.org>
Date:   Fri, 14 Dec 2018 12:58:39 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andy Gross <andy.gross@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 034/142] arm64: dts: sdm845-mtp: Reserve reserved gpios

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit 5f8d3ab136d0ccb59c4d628d8f85e0d8f2761d07 ]

With the introduction of commit 3edfb7bd76bd ("gpiolib: Show correct
direction from the beginning") the gpiolib will attempt to read the
direction of all pins, which triggers a read from protected register
regions.

The pins 0 through 3 and 81 through 84 are protected, so mark these as
reserved.

Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Reviewed-by: Stephen Boyd <sboyd@...nel.org>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Andy Gross <andy.gross@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/boot/dts/qcom/sdm845-mtp.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-mtp.dts b/arch/arm64/boot/dts/qcom/sdm845-mtp.dts
index 6d651f314193..6921f8dc5ebb 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-mtp.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-mtp.dts
@@ -31,6 +31,10 @@
 	status = "okay";
 };
 
+&tlmm {
+	gpio-reserved-ranges = <0 4>, <81 4>;
+};
+
 &uart9 {
 	status = "okay";
 };
-- 
2.19.1