Input: tca6416-keypad - add support for tca6408a
Support 8-bit tca6408a I/O expander as a keypad.
Signed-off-by: Tony SIM <chinyeow.sim.xt@renesas.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index ee85e5b..a378e95 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -180,20 +180,22 @@
module will be called gpio_keys.
config KEYBOARD_TCA6416
- tristate "TCA6416 Keypad Support"
+ tristate "TCA6416/TCA6408A Keypad Support"
depends on I2C
help
This driver implements basic keypad functionality
- for keys connected through TCA6416 IO expander
+ for keys connected through TCA6416/TCA6408A IO expanders.
Say Y here if your device has keys connected to
- TCA6416 IO expander. Your board-specific setup logic
+ TCA6416/TCA6408A IO expander. Your board-specific setup logic
must also provide pin-mask details(of which TCA6416 pins
are used for keypad).
- If enabled the complete TCA6416 device will be managed through
+ If enabled the entire TCA6416 device will be managed through
this driver.
+ To compile this driver as a module, choose M here: the
+ module will be called tca6416_keypad.
config KEYBOARD_MATRIX
tristate "GPIO driven matrix keypad support"
diff --git a/drivers/input/keyboard/tca6416-keypad.c b/drivers/input/keyboard/tca6416-keypad.c
index 00137be..800fbcc 100644
--- a/drivers/input/keyboard/tca6416-keypad.c
+++ b/drivers/input/keyboard/tca6416-keypad.c
@@ -29,6 +29,7 @@
static const struct i2c_device_id tca6416_id[] = {
{ "tca6416-keys", 16, },
+ { "tca6408-keys", 8, },
{ }
};
MODULE_DEVICE_TABLE(i2c, tca6416_id);
@@ -46,8 +47,9 @@
struct i2c_client *client;
struct input_dev *input;
struct delayed_work dwork;
- u16 pinmask;
+ int io_size;
int irqnum;
+ u16 pinmask;
bool use_polling;
struct tca6416_button buttons[0];
};
@@ -56,7 +58,9 @@
{
int error;
- error = i2c_smbus_write_word_data(chip->client, reg << 1, val);
+ error = chip->io_size > 8 ?
+ i2c_smbus_write_word_data(chip->client, reg << 1, val) :
+ i2c_smbus_write_byte_data(chip->client, reg, val);
if (error < 0) {
dev_err(&chip->client->dev,
"%s failed, reg: %d, val: %d, error: %d\n",
@@ -71,7 +75,9 @@
{
int retval;
- retval = i2c_smbus_read_word_data(chip->client, reg << 1);
+ retval = chip->io_size > 8 ?
+ i2c_smbus_read_word_data(chip->client, reg << 1) :
+ i2c_smbus_read_byte_data(chip->client, reg);
if (retval < 0) {
dev_err(&chip->client->dev, "%s failed, reg: %d, error: %d\n",
__func__, reg, retval);
@@ -224,6 +230,7 @@
chip->client = client;
chip->input = input;
+ chip->io_size = id->driver_data;
chip->pinmask = pdata->pinmask;
chip->use_polling = pdata->use_polling;