On 17/08/2025 12:27, Alexander Kurz wrote:
> Add OF support for the mc13783-pwrbutton so that it can be used with
> modern DT based systems.
>
> Signed-off-by: Alexander Kurz <akurz@xxxxxxxx>
> ---
> drivers/input/misc/mc13783-pwrbutton.c | 78 +++++++++++++++++++++++++-
> 1 file changed, 75 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/input/misc/mc13783-pwrbutton.c b/drivers/input/misc/mc13783-pwrbutton.c
> index 49bc5d25f098..11a97ce070a5 100644
> --- a/drivers/input/misc/mc13783-pwrbutton.c
> +++ b/drivers/input/misc/mc13783-pwrbutton.c
> @@ -29,6 +29,7 @@
> #include <linux/mfd/mc13783.h>
> #include <linux/sched.h>
> #include <linux/slab.h>
> +#include <linux/of.h>
>
> struct mc13783_pwrb {
> struct input_dev *pwr;
> @@ -105,8 +106,75 @@ static irqreturn_t button3_irq(int irq, void *_priv)
> return button_irq(MC13783_IRQ_ONOFD3, _priv);
> }
>
> +#ifdef CONFIG_OF
> +static inline struct mc13xxx_buttons_platform_data __init *mc13xxx_pwrbutton_probe_dt(
> + struct platform_device *pdev)
> +{
> + struct mc13xxx_buttons_platform_data *pdata;
> + struct device_node *parent, *child;
> + struct device *dev = &pdev->dev;
> + enum mc13xxx_chip_type chip = platform_get_device_id(pdev)->driver_data;
> + int ret = -ENODATA;
> +
No blank lines between declarations.
> + /* ONOFD3 is only supported for MC13783. */
> + int max_idx = chip != MC13XXX_CHIP_TYPE_MC13783 ? 2 : 1;
Ternary operator is hardly readable. Just store the number of buttons in
device match data
> +
> + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
> + if (!pdata)
> + return ERR_PTR(-ENOMEM);
> +
> + parent = of_get_child_by_name(dev->parent->of_node, "pwrbuttons");
Node name: buttons or keys instead
> + if (!parent)
> + goto out_node_put;
> +
> + for_each_child_of_node(parent, child) {
> + u32 idx;
> + u8 dbnc = MC13783_BUTTON_DBNC_30MS;
> +
> + if (of_property_read_u32(child, "reg", &idx))
> + continue;
> +
> + if (idx > max_idx) {
> + dev_warn(dev, "reg out of range\n");
> + continue;
> + }
> +
> + of_property_read_u8(child, "debounce-delay-value", &dbnc);
> + if (dbnc > MC13783_BUTTON_DBNC_750MS) {
> + dev_warn(dev, "debounce-delay-value out of range\n");
> + continue;
> + }
> +
> + if (of_property_read_u32(child, "linux,code", &pdata->b_on_key[idx]))
> + continue;
> +
> + if (of_property_read_bool(child, "active-low"))
> + pdata->b_on_flags[idx] |= MC13783_BUTTON_POL_INVERT;
> +
> + if (of_property_read_bool(child, "enable-reset"))
> + pdata->b_on_flags[idx] |= MC13783_BUTTON_RESET_EN;
> +
> + pdata->b_on_flags[idx] |= MC13783_BUTTON_ENABLE | dbnc;
> + }
> +
> + ret = 0;
> +
> +out_node_put:
> + of_node_put(parent);
> +
> + return ret ? ERR_PTR(ret) : pdata;
> +}
> +#else
> +static inline struct mc13xxx_buttons_platform_data __init *mc13xxx_pwrbutton_probe_dt(
Section mismatch. Build your code with proper DEBUG options for section
mismatch check.
> + struct platform_device *pdev)
> +{
> + return ERR_PTR(-ENODEV);
> +}
> +#endif
Best regards,
Krzysztof
