linux-kernel - Re: [PATCH 04/16] PCI: samsung: Use clock bulk API to get clocks

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Date:   Thu, 16 Feb 2023 12:02:36 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Shradha Todi <shradha.t@...sung.com>, lpieralisi@...nel.org,
        kw@...ux.com, robh@...nel.org, bhelgaas@...gle.com,
        krzysztof.kozlowski+dt@...aro.org, alim.akhtar@...sung.com,
        jingoohan1@...il.com, Sergey.Semin@...kalelectronics.ru,
        lukas.bulwahn@...il.com, hongxing.zhu@....com, tglx@...utronix.de,
        m.szyprowski@...sung.com, jh80.chung@...sung.co,
        pankaj.dubey@...sung.com
Cc:     linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/16] PCI: samsung: Use clock bulk API to get clocks

On 14/02/2023 13:13, Shradha Todi wrote:
> Adopt to clock bulk API to handle clocks.
> 
> Signed-off-by: Shradha Todi <shradha.t@...sung.com>
> ---
>  drivers/pci/controller/dwc/pci-samsung.c | 46 ++++++------------------
>  1 file changed, 11 insertions(+), 35 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-samsung.c b/drivers/pci/controller/dwc/pci-samsung.c
> index cfe384aee754..6c07d3f151be 100644
> --- a/drivers/pci/controller/dwc/pci-samsung.c
> +++ b/drivers/pci/controller/dwc/pci-samsung.c
> @@ -54,8 +54,8 @@
>  struct exynos_pcie {
>  	struct dw_pcie			pci;
>  	void __iomem			*elbi_base;
> -	struct clk			*clk;
> -	struct clk			*bus_clk;
> +	struct clk_bulk_data		*clks;
> +	int				clk_cnt;
>  	struct phy			*phy;
>  	struct regulator_bulk_data	supplies[2];
>  };
> @@ -65,30 +65,18 @@ static int exynos_pcie_init_clk_resources(struct exynos_pcie *ep)
>  	struct device *dev = ep->pci.dev;
>  	int ret;
>  
> -	ret = clk_prepare_enable(ep->clk);
> -	if (ret) {
> -		dev_err(dev, "cannot enable pcie rc clock");
> +	ret = devm_clk_bulk_get_all(dev, &ep->clks);
> +	if (ret < 0)
>  		return ret;
> -	}
>  
> -	ret = clk_prepare_enable(ep->bus_clk);
> -	if (ret) {
> -		dev_err(dev, "cannot enable pcie bus clock");
> -		goto err_bus_clk;
> -	}
> +	ep->clk_cnt = ret;

I think this misses check if you got two clocks.


Best regards,
Krzysztof