linux-kernel - [PATCH v4 04/10] arm64: dts: actions: limit address range for pinctrl node

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Message-Id: <1591697830-16311-5-git-send-email-amittomer25@gmail.com>
Date:   Tue,  9 Jun 2020 15:47:04 +0530
From:   Amit Singh Tomar <amittomer25@...il.com>
To:     andre.przywara@....com, afaerber@...e.de,
        manivannan.sadhasivam@...aro.org, robh+dt@...nel.org
Cc:     cristian.ciocaltea@...il.com, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-actions@...ts.infradead.org, devicetree@...r.kernel.org
Subject: [PATCH v4 04/10] arm64: dts: actions: limit address range for pinctrl node

After commit 7cdf8446ed1d ("arm64: dts: actions: Add pinctrl node for
Actions Semi S700") following error has been observed while booting
Linux on Cubieboard7-lite(based on S700 SoC).

[    0.257415] pinctrl-s700 e01b0000.pinctrl: can't request region for
resource [mem 0xe01b0000-0xe01b0fff]
[    0.266902] pinctrl-s700: probe of e01b0000.pinctrl failed with error -16

This is due to the fact that memory range for "sps" power domain controller
clashes with pinctrl.

One way to fix it, is to limit pinctrl address range which is safe
to do as current pinctrl driver uses address range only up to 0x100.

This commit limits the pinctrl address range to 0x100 so that it doesn't
conflict with sps range.

Fixes: 7cdf8446ed1d ("arm64: dts: actions: Add pinctrl node for Actions
Semi S700")

Suggested-by: Andre Przywara <andre.przywara@....com>
Signed-off-by: Amit Singh Tomar <amittomer25@...il.com>
---
Changes since v3:
	* No change.
Changes since v2:
        * this is no more don't merge and fixed
          the broken S700 boot by limiting pinctrl
          address range.
        * Modified the subject to reflect the changes.
Changes since v1:
        * No change.
Changes since RFC:
        * kept as do not merge.
---
 arch/arm64/boot/dts/actions/s700.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/actions/s700.dtsi b/arch/arm64/boot/dts/actions/s700.dtsi
index 2006ad5424fa..f8eb72bb4125 100644
--- a/arch/arm64/boot/dts/actions/s700.dtsi
+++ b/arch/arm64/boot/dts/actions/s700.dtsi
@@ -231,7 +231,7 @@
 
 		pinctrl: pinctrl@...b0000 {
 			compatible = "actions,s700-pinctrl";
-			reg = <0x0 0xe01b0000 0x0 0x1000>;
+			reg = <0x0 0xe01b0000 0x0 0x100>;
 			clocks = <&cmu CLK_GPIO>;
 			gpio-controller;
 			gpio-ranges = <&pinctrl 0 0 136>;
-- 
2.7.4