On Wed, Mar 30, 2022 at 12:08:29PM +0200, Jean-Jacques Hiblot wrote:
> diff --git a/drivers/watchdog/rzn1_wdt.c b/drivers/watchdog/rzn1_wdt.c
[...]
> +/*
> + * Renesas RZ/N1 Watchdog timer.
> + * This is a 12-bit timer driver from a (62.5/16384) MHz clock. It can't even
> + * cope with 2 seconds.
> + *
> + * Copyright 2018 Renesas Electronics Europe Ltd.
s/2018/2022/ ?
> +#define RZN1_WDT_RETRIGGER 0x0
> +#define RZN1_WDT_RETRIGGER_RELOAD_VAL 0
> +#define RZN1_WDT_RETRIGGER_RELOAD_VAL_MASK 0xfff
> +#define RZN1_WDT_RETRIGGER_PRESCALE BIT(12)
> +#define RZN1_WDT_RETRIGGER_ENABLE BIT(13)
> +#define RZN1_WDT_RETRIGGER_WDSI (0x2 << 14)
Do RZN1_WDT_RETRIGGER_RELOAD_VAL and RZN1_WDT_RETRIGGER_WDSI get 1 more tab
indent intentionally?
> +static const struct watchdog_device rzn1_wdt = {
> + .info = &rzn1_wdt_info,
> + .ops = &rzn1_wdt_ops,
> + .status = WATCHDOG_NOWAYOUT_INIT_STATUS,
> +};
[...]
> +static int rzn1_wdt_probe(struct platform_device *pdev)
> +{
[...]
> + wdt->wdt = rzn1_wdt;
Does it really need to copy the memory? For example,
1. Use the memory in `wdt` directly and fill the `wdd`.
struct watchdog_device *wdd = &wdt->wdt;
wdd->info = &rzn1_wdt_info;
wdd->ops = &rzn1_wdt_ops;
...
2. Use drvdata instead of container_of().
Use watchdog_set_drvdata() in _probe and watchdog_get_drvdata() in the
watchdog ops to get struct rzn1_watchdog.
> +static const struct of_device_id rzn1_wdt_match[] = {
> + { .compatible = "renesas,rzn1-wdt" },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, rzn1_wdt_match);
Doesn't it need to guard by CONFIG_OF?
> +static struct platform_driver rzn1_wdt_driver = {
> + .probe = rzn1_wdt_probe,
> + .driver = {
> + .name = KBUILD_MODNAME,
> + .of_match_table = rzn1_wdt_match,
Does it makes more sense to use of_match_ptr()?
> + },
> +};
> +
> +module_platform_driver(rzn1_wdt_driver);
To make it look like a whole thing, I prefer to remove the extra blank line
in between struct platform_driver and module_platform_driver().
