gpio: pca953x_gpio: Add support for 24 bit IO expander
J721e EVM has a TCA6424 IO expander that has 24 GPIOs. Add support for
the same
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/drivers/gpio/pca953x_gpio.c b/drivers/gpio/pca953x_gpio.c
index 07a3356..5c29440 100644
--- a/drivers/gpio/pca953x_gpio.c
+++ b/drivers/gpio/pca953x_gpio.c
@@ -15,8 +15,7 @@
*
* TODO:
* 1. Support PCA957X_TYPE
- * 2. Support 24 gpio pins
- * 3. Support Polarity Inversion
+ * 2. Support Polarity Inversion
*/
#include <common.h>
@@ -118,6 +117,10 @@
ret = dm_i2c_read(dev, reg, val, 1);
} else if (info->gpio_count <= 16) {
ret = dm_i2c_read(dev, reg << 1, val, info->bank_count);
+ } else if (info->gpio_count <= 24) {
+ /* Auto increment */
+ ret = dm_i2c_read(dev, (reg << 2) | 0x80, val,
+ info->bank_count);
} else if (info->gpio_count == 40) {
/* Auto increment */
ret = dm_i2c_read(dev, (reg << 3) | 0x80, val,
@@ -139,6 +142,10 @@
ret = dm_i2c_write(dev, reg, val, 1);
} else if (info->gpio_count <= 16) {
ret = dm_i2c_write(dev, reg << 1, val, info->bank_count);
+ } else if (info->gpio_count <= 24) {
+ /* Auto increment */
+ ret = dm_i2c_write(dev, (reg << 2) | 0x80, val,
+ info->bank_count);
} else if (info->gpio_count == 40) {
/* Auto increment */
ret = dm_i2c_write(dev, (reg << 3) | 0x80, val, info->bank_count);