Re: [PATCH v3 6/6] clk: rockchip: rk3399: Support module build

["Heiko Stübner" <heiko@sntech.de>]

Am Freitag, 4. September 2020, 09:45:05 CEST schrieb Elaine Zhang:
> support CLK_OF_DECLARE and builtin_platform_driver_probe
> double clk init method.
> add module author, description and license to support building
> Soc Rk3399 clock driver as module.
> 
> Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
> Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
> ---
>  drivers/clk/rockchip/clk-rk3399.c | 55 +++++++++++++++++++++++++++++++
>  1 file changed, 55 insertions(+)
> 
> diff --git a/drivers/clk/rockchip/clk-rk3399.c b/drivers/clk/rockchip/clk-rk3399.c
> index ce1d2446f142..40ff17aee5b6 100644
> --- a/drivers/clk/rockchip/clk-rk3399.c
> +++ b/drivers/clk/rockchip/clk-rk3399.c
> @@ -5,9 +5,11 @@
>   */
>  
>  #include <linux/clk-provider.h>
> +#include <linux/module.h>
>  #include <linux/io.h>
>  #include <linux/of.h>
>  #include <linux/of_address.h>
> +#include <linux/of_device.h>
>  #include <linux/platform_device.h>
>  #include <linux/regmap.h>
>  #include <dt-bindings/clock/rk3399-cru.h>
> @@ -1600,3 +1602,56 @@ static void __init rk3399_pmu_clk_init(struct device_node *np)
>  	rockchip_clk_of_add_provider(np, ctx);
>  }
>  CLK_OF_DECLARE(rk3399_cru_pmu, "rockchip,rk3399-pmucru", rk3399_pmu_clk_init);
> +
> +struct clk_rk3399_inits {
> +		void (*inits)(struct device_node *np);
> +};
> +
> +static const struct clk_rk3399_inits clk_rk3399_pmucru_init = {
> +	.inits = rk3399_pmu_clk_init,
> +};
> +
> +static const struct clk_rk3399_inits clk_rk3399_cru_init = {
> +	.inits = rk3399_clk_init,
> +};
> +
> +static const struct of_device_id clk_rk3399_match_table[] = {
> +	{
> +		.compatible = "rockchip,rk3399-cru",
> +		.data = &clk_rk3399_cru_init,
> +	},  {
> +		.compatible = "rockchip,rk3399-pmucru",
> +		.data = &clk_rk3399_pmucru_init,
> +	},
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, clk_rk3399_match_table);
> +
> +static int __init clk_rk3399_probe(struct platform_device *pdev)
> +{
> +	struct device_node *np = pdev->dev.of_node;
> +	const struct of_device_id *match;
> +	const struct clk_rk3399_inits *init_data;
> +
> +	match = of_match_device(clk_rk3399_match_table, &pdev->dev);
> +	if (!match || !match->data)
> +		return -EINVAL;
> +
> +	init_data = match->data;
> +	if (init_data->inits)
> +		init_data->inits(np);
> +
> +	return 0;
> +}
> +
> +static struct platform_driver clk_rk3399_driver = {
> +	.driver		= {
> +		.name	= "clk-rk3399",
> +		.of_match_table = clk_rk3399_match_table,

I guess we probably want
		.suppress_bind_attrs = true,

here, because there is no unloading.
Also what happens when you try to rmmod the module?

Heiko