On Fri, Feb 06, 2015 at 09:32:02AM +0000, Hans Holmberg wrote:
> This is an interrupt-driven driver for digital joysticks
> connected to GPIOs. Supports any digital joystick with
> signals for up, down, left, right and one signal for
> trigger button press, i.e. C64/Atari joysticks.
>
> Signed-off-by: Hans Holmberg <hans.holmberg@xxxxxxxxx>
> ---
> drivers/input/joystick/Kconfig | 10 ++
> drivers/input/joystick/Makefile | 1 +
> drivers/input/joystick/gpio_joy.c | 208 ++++++++++++++++++++++++++++++++++++++
> 3 files changed, 219 insertions(+)
> create mode 100644 drivers/input/joystick/gpio_joy.c
[...]
> +static int gpio_joy_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct input_dev *input;
> + struct gpio_joy_drvdata *ddata;
> + int i, err;
> + unsigned int debounce_ms;
This should be a u32 given you pass it to a function expecting a u32
pointer.
> +
> + ddata = devm_kzalloc(dev, sizeof(struct gpio_joy_drvdata), GFP_KERNEL);
Use sizeof(*ddata)
[...]
> + return 0;
> +fail:
> + return err;
> +}
Given there's no cleanup, the fail path seems redundant.
[...]
> +static const struct of_device_id gpio_joy_of_match[] = {
> + { .compatible = DRV_NAME, },
> + { },
> +};
The compatible string should be independent of DRV_NAME, because it must
match the binding. The driver can be arbitrarily and independently renamed.
Thanks,
Mark.
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