Re: [PATCH v3 1/2] pinctrl: pinctrl-loongson2: add pinctrl driver support

[Krzysztof Kozlowski]

On 23/10/2022 21:42, Yinbo Zhu wrote:
> The loongson2 SoC has a few pins that can be used as GPIOs or take
> multiple other functions. Add a driver for the pinmuxing.
> 
> There is currently no support for GPIO pin pull-up and pull-down.

Thank you for your patch. There is something to discuss/improve.

> +static const struct pinmux_ops loongson2_pmx_ops = {
> +	.set_mux = loongson2_pmx_set_mux,
> +	.get_functions_count = loongson2_pmx_get_funcs_count,
> +	.get_function_name = loongson2_pmx_get_func_name,
> +	.get_function_groups = loongson2_pmx_get_groups,
> +};
> +
> +static int loongson2_pinctrl_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct loongson2_pinctrl *pctrl;
> +	struct resource *res;
> +
> +	pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);
> +	if (!pctrl)
> +		return -ENOMEM;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	pctrl->reg_base = devm_ioremap_resource(dev, res);

This is still not fixed.

> +	if (IS_ERR(pctrl->reg_base))
> +		return dev_err_probe(pctrl->dev, PTR_ERR(pctrl->reg_base),
> +				     "unable to map I/O memory");


Best regards,
Krzysztof