Hi Utsav,
On Thu, Jul 04, 2024 at 03:26:31PM +0100, Utsav Agarwal via B4 Relay wrote:
> From: Utsav Agarwal <utsav.agarwal@xxxxxxxxxx>
>
> Keypad specific setup is relaxed if no keypad rows/columns are specified,
> enabling a purely gpio operation.
>
> Signed-off-by: Utsav Agarwal <utsav.agarwal@xxxxxxxxxx>
> ---
> drivers/input/keyboard/adp5588-keys.c | 37 +++++++++++++++++++++++++++++++----
> 1 file changed, 33 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
> index 09bcfc6b9408..7c32f8b69a3e 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;
> @@ -431,10 +432,12 @@ static int adp5588_gpio_add(struct adp5588_kpad *kpad)
> kpad->gc.label = kpad->client->name;
> kpad->gc.owner = THIS_MODULE;
>
> - girq = &kpad->gc.irq;
> - gpio_irq_chip_set_chip(girq, &adp5588_irq_chip);
> - girq->handler = handle_bad_irq;
> - girq->threaded = true;
> + if (kpad->client->irq) {
> + girq = &kpad->gc.irq;
> + gpio_irq_chip_set_chip(girq, &adp5588_irq_chip);
> + girq->handler = handle_bad_irq;
> + girq->threaded = true;
> + }
>
> mutex_init(&kpad->gpio_lock);
>
> @@ -632,6 +635,21 @@ 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 +793,11 @@ static int adp5588_probe(struct i2c_client *client)
> if (error)
> return error;
>
> + if (kpad->gpio_only && !client->irq) {
> + dev_info(&client->dev, "Rev.%d, started as GPIO only\n", revid);
> + return 0;
I think we need more elaborate handling here (and probably more
elaborate binding yaml file): now that you are making interrupt optional
you should check if interrupt-controller functionality of the GPIO
block/gpiochip is requested. If it was, then we should not allow missing
interrupt. If only GPIO controller is needed, without interrupt
capabilities, tnen running without interrupt is fine.
Thanks.
--
Dmitry
