linux-kernel - Re: [PATCH 054/102] PCI: rockchip: explicitly request exclusive reset control

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Date:   Thu, 3 Aug 2017 08:31:55 +0800
From:   Shawn Lin <shawn.lin@...k-chips.com>
To:     Philipp Zabel <p.zabel@...gutronix.de>
Cc:     linux-kernel@...r.kernel.org, shawn.lin@...k-chips.com,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Heiko Stuebner <heiko@...ech.de>, linux-pci@...r.kernel.org,
        linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH 054/102] PCI: rockchip: explicitly request exclusive reset
 control

Hi,

On 2017/7/19 23:25, Philipp Zabel wrote:
> Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
> reset lines") started to transition the reset control request API calls
> to explicitly state whether the driver needs exclusive or shared reset
> control behavior. Convert all drivers requesting exclusive resets to the
> explicit API call so the temporary transition helpers can be removed.
> 
> No functional changes.
> 
> Cc: Shawn Lin <shawn.lin@...k-chips.com>
> Cc: Bjorn Helgaas <bhelgaas@...gle.com>
> Cc: Heiko Stuebner <heiko@...ech.de>
> Cc: linux-pci@...r.kernel.org
> Cc: linux-rockchip@...ts.infradead.org
> Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>

Acked-by: Shawn Lin <shawn.lin@...k-chips.com>

> ---
>   drivers/pci/host/pcie-rockchip.c | 15 ++++++++-------
>   1 file changed, 8 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
> index 7bb9870f6d8ce..e50d6f5a81f4b 100644
> --- a/drivers/pci/host/pcie-rockchip.c
> +++ b/drivers/pci/host/pcie-rockchip.c
> @@ -903,49 +903,50 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
>   	if (rockchip->link_gen < 0 || rockchip->link_gen > 2)
>   		rockchip->link_gen = 2;
>   
> -	rockchip->core_rst = devm_reset_control_get(dev, "core");
> +	rockchip->core_rst = devm_reset_control_get_exclusive(dev, "core");
>   	if (IS_ERR(rockchip->core_rst)) {
>   		if (PTR_ERR(rockchip->core_rst) != -EPROBE_DEFER)
>   			dev_err(dev, "missing core reset property in node\n");
>   		return PTR_ERR(rockchip->core_rst);
>   	}
>   
> -	rockchip->mgmt_rst = devm_reset_control_get(dev, "mgmt");
> +	rockchip->mgmt_rst = devm_reset_control_get_exclusive(dev, "mgmt");
>   	if (IS_ERR(rockchip->mgmt_rst)) {
>   		if (PTR_ERR(rockchip->mgmt_rst) != -EPROBE_DEFER)
>   			dev_err(dev, "missing mgmt reset property in node\n");
>   		return PTR_ERR(rockchip->mgmt_rst);
>   	}
>   
> -	rockchip->mgmt_sticky_rst = devm_reset_control_get(dev, "mgmt-sticky");
> +	rockchip->mgmt_sticky_rst = devm_reset_control_get_exclusive(dev,
> +								     "mgmt-sticky");
>   	if (IS_ERR(rockchip->mgmt_sticky_rst)) {
>   		if (PTR_ERR(rockchip->mgmt_sticky_rst) != -EPROBE_DEFER)
>   			dev_err(dev, "missing mgmt-sticky reset property in node\n");
>   		return PTR_ERR(rockchip->mgmt_sticky_rst);
>   	}
>   
> -	rockchip->pipe_rst = devm_reset_control_get(dev, "pipe");
> +	rockchip->pipe_rst = devm_reset_control_get_exclusive(dev, "pipe");
>   	if (IS_ERR(rockchip->pipe_rst)) {
>   		if (PTR_ERR(rockchip->pipe_rst) != -EPROBE_DEFER)
>   			dev_err(dev, "missing pipe reset property in node\n");
>   		return PTR_ERR(rockchip->pipe_rst);
>   	}
>   
> -	rockchip->pm_rst = devm_reset_control_get(dev, "pm");
> +	rockchip->pm_rst = devm_reset_control_get_exclusive(dev, "pm");
>   	if (IS_ERR(rockchip->pm_rst)) {
>   		if (PTR_ERR(rockchip->pm_rst) != -EPROBE_DEFER)
>   			dev_err(dev, "missing pm reset property in node\n");
>   		return PTR_ERR(rockchip->pm_rst);
>   	}
>   
> -	rockchip->pclk_rst = devm_reset_control_get(dev, "pclk");
> +	rockchip->pclk_rst = devm_reset_control_get_exclusive(dev, "pclk");
>   	if (IS_ERR(rockchip->pclk_rst)) {
>   		if (PTR_ERR(rockchip->pclk_rst) != -EPROBE_DEFER)
>   			dev_err(dev, "missing pclk reset property in node\n");
>   		return PTR_ERR(rockchip->pclk_rst);
>   	}
>   
> -	rockchip->aclk_rst = devm_reset_control_get(dev, "aclk");
> +	rockchip->aclk_rst = devm_reset_control_get_exclusive(dev, "aclk");
>   	if (IS_ERR(rockchip->aclk_rst)) {
>   		if (PTR_ERR(rockchip->aclk_rst) != -EPROBE_DEFER)
>   			dev_err(dev, "missing aclk reset property in node\n");
>