On 10/08/2024 06:48, Lorenzo Bianconi wrote:
> From: Benjamin Larsson <benjamin.larsson@xxxxxxxxxx>
>
> Introduce driver for PWM module available on EN7581 SoC.
>
> Signed-off-by: Benjamin Larsson <benjamin.larsson@xxxxxxxxxx>
> Co-developed-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
> Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
> ---
...
> +
> +static void airoha_pwm_config_flash_map(struct airoha_pwm *pc,
> + unsigned int hwpwm, int index)
> +{
> + u32 addr, mask, val;
> +
> + if (hwpwm < PWM_NUM_GPIO) {
> + addr = REG_GPIO_FLASH_MAP(hwpwm / 8);
> + } else {
> + addr = REG_SIPO_FLASH_MAP(hwpwm / 8);
> + hwpwm -= PWM_NUM_GPIO;
> + }
> +
> + if (index < 0) {
> + /* Change of waveform takes effect immediately but
This and other comments should be not netdev-style but general Linux style.
> + * disabling has some delay so to prevent glitching
> + * only the enable bit is touched when disabling
> + */
> + airoha_pwm_flash_clear(pc, addr, GPIO_FLASH_EN(hwpwm % 8));
> + return;
...
> +
> +static const struct of_device_id airoha_pwm_of_match[] = {
> + { .compatible = "airoha,en7581-pwm" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, airoha_pwm_of_match);
> +
> +static struct platform_driver airoha_pwm_driver = {
> + .driver = {
> + .name = "airoha-pwm",
> + .of_match_table = airoha_pwm_of_match,
> + },
> + .probe = airoha_pwm_probe,
> +};
> +module_platform_driver(airoha_pwm_driver);
> +
> +MODULE_ALIAS("platform:airoha-pwm");
You should not need MODULE_ALIAS() in normal cases. If you need it,
usually it means your device ID table is wrong (e.g. misses either
entries or MODULE_DEVICE_TABLE()). MODULE_ALIAS() is not a substitute
for incomplete ID table.
Especially that it does not match compatible, so you cannot use excuse
module autoloading does not work for given OF node...
Best regards,
Krzysztof
