On Tue, Mar 13, 2018 at 10:59 PM, Eddie James
<eajames@xxxxxxxxxxxxxxxxxx> wrote:
> From: Christopher Bostic <cbostic@xxxxxxxxxxxxxxxxxx>
>
> Add a struct gpio_chip and define some methods so that this device's
> I/O can be accessed via /sys/class/gpio.
> + /*
> + * Note:
> + *
> + * Pinmux support has not been added to the new gpio_chip.
> + * This support should be added when possible given the mux
> + * behavior of these IO devices.
> + */
> + data->gpio.label = (const char *)&client->name;
Hmm... Why do you need this casting?
> + data->gpio.get_direction = ucd9000_gpio_get_direction;
> + data->gpio.direction_input = ucd9000_gpio_direction_input;
> + data->gpio.direction_output = ucd9000_gpio_direction_output;
> + data->gpio.get = ucd9000_gpio_get;
> + data->gpio.set = ucd9000_gpio_set;
> + data->gpio.can_sleep = 1;
Isn't it type of boolean?
> + data->gpio.base = -1;
> + data->gpio.parent = &client->dev;
> + data->gpio.owner = THIS_MODULE;
> + data->gpio.of_node = client->dev.of_node;
I think GPIO core does this for you.
> + if (data->gpio.ngpio) {
Hmm...
I would rather reorganize the above part to a separate helper, like
static int ..._probe_gpio()
{
...
switch () {
default:
return 0; /* GPIO part is optional */
}
return 0;
}
ret = _probe_gpio();
if (ret)
dev_warn();
> + ret = devm_gpiochip_add_data(&client->dev, &data->gpio,
> + client);
> + if (ret)
> + dev_warn(&client->dev, "Could not add gpiochip: %d\n",
> + ret);
> + }
> +
> return pmbus_do_probe(client, mid, info);
> }
>
> --
> 1.8.3.1
>
--
With Best Regards,
Andy Shevchenko
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