linux-kernel - Re: [PATCH v5 3/6] rockchip: power-domain: add support for sub-power domains

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Date:	Tue, 8 Mar 2016 18:41:36 +0800
From:	Caesar Wang <caesar.upstream@...il.com>
To:	Elaine Zhang <zhangqing@...k-chips.com>, wxt@...k-chips.com
Cc:	heiko@...ech.de, khilman@...libre.com, huangtao@...k-chips.com,
	xxx@...k-chips.com, linux-kernel@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, zyw@...k-chips.com,
	jay.xu@...k-chips.com, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v5 3/6] rockchip: power-domain: add support for sub-power
 domains



在 2016年03月03日 16:03, Elaine Zhang 写道:
> This patch adds support for making one power domain a sub-domain of
> other domain. This is useful for modeling power dependences,
> which needs to have more than one power domain enabled to be operational.
>
> Signed-off-by: Elaine Zhang <zhangqing@...k-chips.com>
> ---
>   drivers/soc/rockchip/pm_domains.c | 64 +++++++++++++++++++++++++++++++++++++++
>   1 file changed, 64 insertions(+)
>
> diff --git a/drivers/soc/rockchip/pm_domains.c b/drivers/soc/rockchip/pm_domains.c
> index 0465a06..1777e8e 100644
> --- a/drivers/soc/rockchip/pm_domains.c
> +++ b/drivers/soc/rockchip/pm_domains.c
> @@ -370,6 +370,63 @@ static void rockchip_configure_pd_cnt(struct rockchip_pmu *pmu,
>   	regmap_write(pmu->regmap, domain_reg_offset + 4, count);
>   }
>   
> +static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
> +				     struct device_node *parent)
> +{
[...]
> +		child_domain = pmu->genpd_data.domains[idx];
> +
> +		if (pm_genpd_add_subdomain(parent_domain, child_domain)) {
> +			dev_err(pmu->dev, "%s failed to add subdomain: %s\n",
> +				parent_domain->name, child_domain->name);
> +			goto err_out;
> +		} else {
> +			dev_info(pmu->dev, "%s add subdomain: %s\n",
> +				parent_domain->name, child_domain->name);
> +		}

s/dev_info/dev_dbg

CHECK: Alignment should match open parenthesis

#416: FILE: drivers/soc/rockchip/pm_domains.c:416:
+            dev_info(pmu->dev, "%s add subdomain: %s\n",
+                parent_domain->name, child_domain->name);

> +
> +		error = rockchip_pm_add_subdomain(pmu, np);
> +		if (error < 0)
> +			goto rm_sub_domain;
> +	}
> +	return 0;
> +
> +err_out:
> +	of_node_put(parent);
> +	of_node_put(np);
> +	return -EINVAL;
> +rm_sub_domain:
> +	pm_genpd_remove_subdomain(parent_domain, child_domain);
> +	return error;
> +}
> +
>   static int rockchip_pm_domain_probe(struct platform_device *pdev)
>   {
>   	struct device *dev = &pdev->dev;
> @@ -440,6 +497,13 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev)
>   			of_node_put(node);
>   			goto err_out;
>   		}
> +
> +		error = rockchip_pm_add_subdomain(pmu, node);
> +		if (error < 0) {
> +			dev_err(dev, "failed to handle subdomain node %s: %d\n",
> +				node->name, error);
> +			goto err_out;
> +		}
>   	}
>   
>   	if (error) {


-- 
Thanks,
Caesar