[PATCH 6.18 127/752] gpio: pca953x: Add support for TCAL6408 TCAL6416

Sasha Levin
2026-02-28T17:49:55Z

From: Jan Remmet <j.remmet@phytec.de>

[ Upstream commit a30a9cb9bca4296d25f253619883e7013b6be158 ]

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

They use the same programming model ad the NXP PCAL64xx, but
support a lower supply power (1.08V to 3.6V) compared to PCAL
(1.65V to 5.5V)

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@phytec.de>
Link: https://lore.kernel.org/r/20251216-wip-jremmet-tcal6416rtw-v2-3-6516d98a9836@phytec.de
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 e053524c5e35f..4d644dcecad93 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 34cadce9b3101..f7daeadaea57c 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);
@@ -1466,6 +1469,9 @@ 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), },
--
2.51.0