gpio: pca953x: Add support for the NXP PCAL9554B/C

The NXP PCAL9554B is a variant of the PCA953x GPIO expander,
with 8 GPIOs, latched interrupts and some advanced configuration
options. The "C" version only differs in I2C address.

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20200930092053.2114-2-mike.looijmans@topic.nl
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index b5c3e56..4302bde 100644 (file)
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -90,6 +90,7 @@ static const struct i2c_device_id pca953x_id[] = {
        { "pcal6416", 16 | PCA953X_TYPE | PCA_LATCH_INT, },
        { "pcal6524", 24 | PCA953X_TYPE | PCA_LATCH_INT, },
        { "pcal9535", 16 | PCA953X_TYPE | PCA_LATCH_INT, },
+       { "pcal9554b", 8  | PCA953X_TYPE | PCA_LATCH_INT, },
        { "pcal9555a", 16 | PCA953X_TYPE | PCA_LATCH_INT, },
 
        { "max7310", 8  | PCA953X_TYPE, },
@@ -1234,6 +1235,7 @@ static const struct of_device_id pca953x_dt_ids[] = {
        { .compatible = "nxp,pcal6416", .data = OF_953X(16, PCA_LATCH_INT), },
        { .compatible = "nxp,pcal6524", .data = OF_953X(24, PCA_LATCH_INT), },
        { .compatible = "nxp,pcal9535", .data = OF_953X(16, PCA_LATCH_INT), },
+       { .compatible = "nxp,pcal9554b", .data = OF_953X( 8, PCA_LATCH_INT), },
        { .compatible = "nxp,pcal9555a", .data = OF_953X(16, PCA_LATCH_INT), },
 
        { .compatible = "maxim,max7310", .data = OF_953X( 8, 0), },