diff options
| -rw-r--r-- | drivers/gpio/pca953x_gpio.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/gpio/pca953x_gpio.c b/drivers/gpio/pca953x_gpio.c index 07a3356b3c..5c2944067b 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 @@ static int pca953x_read_regs(struct udevice *dev, int reg, u8 *val) 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 @@ static int pca953x_write_regs(struct udevice *dev, int reg, u8 *val) 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); |