linux-kernel - [PATCH 1/3] gpio: pca953x: Add support for TCAL6408 TCAL6416

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Message-ID: <20251212-wip-jremmet-tcal6416rtw-v1-1-e5db1b66d4cc@phytec.de>
Date: Fri, 12 Dec 2025 14:03:16 +0100
From: Jan Remmet <j.remmet@...tec.de>
To: Linus Walleij <linusw@...nel.org>, Bartosz Golaszewski <brgl@...nel.org>,
	Jonathan Corbet <corbet@....net>, Rob Herring <robh@...nel.org>, "Krzysztof
 Kozlowski" <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
	Levente Révész <levente.revesz@...abs.com>
CC: <linux-gpio@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Krzysztof Kozlowski <krzk@...nel.org>,
	<devicetree@...r.kernel.org>, <upstream@...ts.phytec.de>
Subject: [PATCH 1/3] gpio: pca953x: Add support for TCAL6408 TCAL6416

TCAL6408 and TCAL6416 supports latchable inputs and maskable interrupt.
Tested on a TCAL6416, checked datasheets for the TCAL6408.

Datasheet: https://www.ti.com/lit/ds/symlink/tcal6408.pdf
Datasheet: https://www.ti.com/lit/ds/symlink/tcal6416.pdf

Signed-off-by: Jan Remmet <j.remmet@...tec.de>
---
 drivers/gpio/Kconfig        | 4 ++--
 drivers/gpio/gpio-pca953x.c | 6 ++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index c74da29253e810b51540684b1186e8f274066b69..2a0e8d007e8814d8c31b8b35c8ecc401056dcf90 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1194,11 +1194,11 @@ config GPIO_PCA953X
 
 	  8 bits:       max7310, max7315, pca6107, pca9534, pca9538, pca9554,
 	                pca9556, pca9557, pca9574, tca6408, tca9554, xra1202,
-			pcal6408, pcal9554b, tca9538
+			pcal6408, pcal9554b, tca9538, tcal6408
 
 	  16 bits:      max7312, max7313, pca9535, pca9539, pca9555, pca9575,
 	                tca6416, pca6416, pcal6416, pcal9535, pcal9555a, max7318,
-			tca9539
+			tca9539, tcal6416
 
 	  18 bits:	tca6418
 
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 0a3916cc2772a19de90c7683cb7dc7010524f71e..dd0e09961bc9dacfbd4d5d0a146b59edb218962a 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -126,6 +126,9 @@ static const struct i2c_device_id pca953x_id[] = {
 	{ "tca9539", 16 | PCA953X_TYPE | PCA_INT, },
 	{ "tca9554", 8  | PCA953X_TYPE | PCA_INT, },
 	{ "xra1202", 8  | PCA953X_TYPE },
+
+	{ "tcal6408", 8  | PCA953X_TYPE | PCA_LATCH_INT, },
+	{ "tcal6416", 16 | PCA953X_TYPE | PCA_LATCH_INT, },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, pca953x_id);
@@ -1444,6 +1447,9 @@ static const struct of_device_id pca953x_dt_ids[] = {
 	{ .compatible = "ti,tca9538", .data = OF_953X( 8, PCA_INT), },
 	{ .compatible = "ti,tca9539", .data = OF_953X(16, PCA_INT), },
 
+	{ .compatible = "ti,tcal6408", .data = OF_953X( 8, PCA_LATCH_INT), },
+	{ .compatible = "ti,tcal6416", .data = OF_953X(16, PCA_LATCH_INT), },
+
 	{ .compatible = "onnn,cat9554", .data = OF_953X( 8, PCA_INT), },
 	{ .compatible = "onnn,pca9654", .data = OF_953X( 8, PCA_INT), },
 	{ .compatible = "onnn,pca9655", .data = OF_953X(16, PCA_INT), },

-- 
2.43.0