[PATCH 6/6] gpio: rockchip: support acpi

[jay.xu at rock-chips.com]

Hi Andy

--------------
jay.xu at rock-chips.com
>On Fri, Sep 09, 2022 at 05:05:58PM +0800, Jianqun Xu wrote:
>> The gpio driver for rockchip gpio controller is seperated from rockchip
>> pinctrl driver, at the first version, it keeps things original to make
>> the patch easy to be reviewed, such as the gpio driver must work with
>> the pinctrl dt node to be its parent node.
>>
>> This patch wants to fix driver to support acpi since gpio controller
>> should work well during acpi is enabled. But during upstream, driver is
>> better to fix other thing together includes:
>>  - add 'clock-names' to allow driver to get clocks by devm_clk_get().
>>  - get io resource and irq by platform common apis.
>>  - use fwnode instead of of_node from device structure.
>
>The dependency patch is the part of another series. Dunno what will happen
>to that series. In either way we would need maintainer's (Rafael) tag. 

Got it, thanks
>
>...
>
>> +static int rockchip_gpio_get_clocks(struct rockchip_pin_bank *bank)
>> +{
>> +	struct device *dev = bank->dev;
>> +	struct fwnode_handle *fwnode = dev_fwnode(dev);
>> +	int ret;
>> +
>> +	if (!is_of_node(fwnode))
>> +	return 0;
>> +
>> +	bank->clk = devm_clk_get(dev, "bus");
>> +	if (IS_ERR(bank->clk)) {
>> +	dev_err(dev, "fail to get apb clock\n");
>> +	return PTR_ERR(bank->clk);
>> +	}
>
>> +	ret = clk_prepare_enable(bank->clk);
>> +	if (ret < 0)
>> +	return ret;
>
>Now, you are mixinig devm_ with non-devm_ APIs. Perhaps you wanted
>to use devm_clk_get_enabled()? 

I take a try.
>
>> +	bank->db_clk = devm_clk_get(dev, "db");
>> +	if (IS_ERR(bank->db_clk)) {
>> +	bank->db_clk = NULL;
>> +	}
>> +
>> +	ret = clk_prepare_enable(bank->db_clk);
>> +	if (ret < 0) {
>> +	clk_disable_unprepare(bank->clk);
>> +	return ret;
>> +	}
>> 
>>  return 0;
>>  }
>
>...
>
>> +	if (is_acpi_node(fwnode)) {
>> +	if (!acpi_dev_uid_to_integer(ACPI_COMPANION(dev), &uid))
>> +	bank_id = (int)uid;
>
>It probably needs to be
>
>	if (is_acpi_node(fwnode)) {
>	ret = acpi_dev_uid_to_integer(ACPI_COMPANION(dev), &uid);
>	if (ret)
>	return ret;
>	bank_id = uid; 
Got it, thanks

>> +	} else {
>> +	bank_id = of_alias_get_id(to_of_node(fwnode), "gpio");
>> +	if (bank_id < 0)
>> +	bank_id = gpio++;
>> +	}
>
>--
>With Best Regards,
>Andy Shevchenko
>
>