A DM driver for PCA953x was recently introduced by Peng Fan, which lacked
support for the 40 GPIO versions.
This patch adds support for these chips.
Signed-off-by: Mario Six <mario....@gdsys.cc>
---
drivers/gpio/pca953x_gpio.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/gpio/pca953x_gpio.c b/drivers/gpio/pca953x_gpio.c
index 987d10e..065b181 100644
--- a/drivers/gpio/pca953x_gpio.c
+++ b/drivers/gpio/pca953x_gpio.c
@@ -16,8 +16,8 @@
*
* TODO:
* 1. Support PCA957X_TYPE
- * 2. Support max 40 gpio pins
- * 3. Support Plolarity Inversion
+ * 2. Support 24 gpio pins
+ * 3. Support Polarity Inversion
*/
#include <common.h>
@@ -47,7 +47,7 @@ enum {
PCA953X_DIRECTION_OUT,
};
-#define MAX_BANK 3
+#define MAX_BANK 5
#define BANK_SZ 8
DECLARE_GLOBAL_DATA_PTR;
@@ -121,6 +121,9 @@ 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 == 40) {
+ /* Auto increment */
+ ret = dm_i2c_read(dev, (reg << 3) | 0x80, val,
info->bank_count);
} else {
dev_err(dev, "Unsupported now\n");
return -EINVAL;
--
2.7.0.GIT
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