[PATCH v5 2/3] Input: adp5588-keys - add support for pure gpio

Utsav Agarwal via B4 Relay
2024-07-03T10:58:22Z

From: Utsav Agarwal <utsav.agarwal@analog.com>

Keypad specific setup is relaxed if no keypad rows/columns are specified,
enabling a purely gpio operation.

Signed-off-by: Utsav Agarwal <utsav.agarwal@analog.com>
---
drivers/input/keyboard/adp5588-keys.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
index 09bcfc6b9408..691f5790bc81 100644
--- a/drivers/input/keyboard/adp5588-keys.c
+++ b/drivers/input/keyboard/adp5588-keys.c
@@ -188,6 +188,7 @@ struct adp5588_kpad {
u32 cols;
u32 unlock_keys[2];
int nkeys_unlock;
+ bool gpio_only;
unsigned short keycode[ADP5588_KEYMAPSIZE];
unsigned char gpiomap[ADP5588_MAXGPIO];
struct gpio_chip gc;
@@ -632,6 +633,21 @@ static int adp5588_fw_parse(struct adp5588_kpad *kpad)
struct i2c_client *client = kpad->client;
int ret, i;

+ /*
+ * Check if the device is to be operated purely in GPIO mode. To do
+ * so, check that no keypad rows or columns have been specified,
+ * since all GPINS should be configured as GPIO.
+ */
+ ret = device_property_present(&client->dev,
+ "keypad,num-rows");
+ ret |= device_property_present(&client->dev,
+ "keypad,num-columns");
+ /* If purely GPIO, skip keypad setup */
+ if (!ret) {
+ kpad->gpio_only = true;
+ return 0;
+ }
+
ret = matrix_keypad_parse_properties(&client->dev, &kpad->rows,
&kpad->cols);
if (ret)
@@ -775,6 +791,11 @@ static int adp5588_probe(struct i2c_client *client)
if (error)
return error;

+ if (kpad->gpio_only) {
+ dev_info(&client->dev, "Rev.%d, started as GPIO only\n", revid);
+ return 0;
+ }
+
error = devm_request_threaded_irq(&client->dev, client->irq,
adp5588_hard_irq, adp5588_thread_irq,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,

--
2.34.1