linux-kernel - [PATCH v3 2/3] ARM: dts: add ngpios for vf610 compatible gpio controllers

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Message-Id: <20250520-gpio-dts-v3-2-04771c6cf325@nxp.com>
Date: Tue, 20 May 2025 11:46:13 +0800
From: Haibo Chen <haibo.chen@....com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Stefan Agner <stefan@...er.ch>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>
Cc: devicetree@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-gpio@...r.kernel.org, Haibo Chen <haibo.chen@....com>, 
 peng.fan@....com, wahrenst@....net, conor@...nel.org, 
 Frank Li <Frank.Li@....com>
Subject: [PATCH v3 2/3] ARM: dts: add ngpios for vf610 compatible gpio
 controllers

After commit da5dd31efd24 ("gpio: vf610: Switch to gpio-mmio"),
the vf610 GPIO driver no longer uses the static number 32 for
gc->ngpio. This allows users to configure the number of GPIOs
per port.

And some gpio controllers did have less pads. So add 'ngpios' here,
this can save some memory when request bitmap, and also show user
more accurate information when use gpio tools.

Reviewed-by: Frank Li <Frank.Li@....com>
Signed-off-by: Haibo Chen <haibo.chen@....com>
---
 arch/arm/boot/dts/nxp/imx/imx7ulp.dtsi | 4 ++++
 arch/arm/boot/dts/nxp/vf/vfxxx.dtsi    | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/nxp/imx/imx7ulp.dtsi b/arch/arm/boot/dts/nxp/imx/imx7ulp.dtsi
index 3c6ef7bfba60986b797bb01b843830d364c96d45..880b9a4f32b0846a773dbf9ad30715c84ac2fda6 100644
--- a/arch/arm/boot/dts/nxp/imx/imx7ulp.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx7ulp.dtsi
@@ -399,6 +399,7 @@ gpio_ptc: gpio@...e0000 {
 				 <&pcc3 IMX7ULP_CLK_PCTLC>;
 			clock-names = "gpio", "port";
 			gpio-ranges = <&iomuxc1 0 0 20>;
+			ngpios = <20>;
 		};
 
 		gpio_ptd: gpio@...f0000 {
@@ -413,6 +414,7 @@ gpio_ptd: gpio@...f0000 {
 				 <&pcc3 IMX7ULP_CLK_PCTLD>;
 			clock-names = "gpio", "port";
 			gpio-ranges = <&iomuxc1 0 32 12>;
+			ngpios = <12>;
 		};
 
 		gpio_pte: gpio@...00000 {
@@ -427,6 +429,7 @@ gpio_pte: gpio@...00000 {
 				 <&pcc3 IMX7ULP_CLK_PCTLE>;
 			clock-names = "gpio", "port";
 			gpio-ranges = <&iomuxc1 0 64 16>;
+			ngpios = <16>;
 		};
 
 		gpio_ptf: gpio@...10000 {
@@ -441,6 +444,7 @@ gpio_ptf: gpio@...10000 {
 				 <&pcc3 IMX7ULP_CLK_PCTLF>;
 			clock-names = "gpio", "port";
 			gpio-ranges = <&iomuxc1 0 96 20>;
+			ngpios = <20>;
 		};
 	};
 
diff --git a/arch/arm/boot/dts/nxp/vf/vfxxx.dtsi b/arch/arm/boot/dts/nxp/vf/vfxxx.dtsi
index 597f20be82f1ee044e14bfaf3bd05cff37a8ad39..a275821c35d41e97eb2139a081ef5765d07672aa 100644
--- a/arch/arm/boot/dts/nxp/vf/vfxxx.dtsi
+++ b/arch/arm/boot/dts/nxp/vf/vfxxx.dtsi
@@ -318,6 +318,7 @@ gpio0: gpio@...49000 {
 				interrupt-controller;
 				#interrupt-cells = <2>;
 				gpio-ranges = <&iomuxc 0 0 32>;
+				ngpios = <32>;
 			};
 
 			gpio1: gpio@...4a000 {
@@ -329,6 +330,7 @@ gpio1: gpio@...4a000 {
 				interrupt-controller;
 				#interrupt-cells = <2>;
 				gpio-ranges = <&iomuxc 0 32 32>;
+				ngpios = <32>;
 			};
 
 			gpio2: gpio@...4b000 {
@@ -340,6 +342,7 @@ gpio2: gpio@...4b000 {
 				interrupt-controller;
 				#interrupt-cells = <2>;
 				gpio-ranges = <&iomuxc 0 64 32>;
+				ngpios = <32>;
 			};
 
 			gpio3: gpio@...4c000 {
@@ -351,6 +354,7 @@ gpio3: gpio@...4c000 {
 				interrupt-controller;
 				#interrupt-cells = <2>;
 				gpio-ranges = <&iomuxc 0 96 32>;
+				ngpios = <32>;
 			};
 
 			gpio4: gpio@...4d000 {
@@ -362,6 +366,7 @@ gpio4: gpio@...4d000 {
 				interrupt-controller;
 				#interrupt-cells = <2>;
 				gpio-ranges = <&iomuxc 0 128 7>;
+				ngpios = <7>;
 			};
 
 			anatop: anatop@...50000 {

-- 
2.34.1