Re: [PATCH v2 2/4] PCI: mediatek-gen3: rely on clk_bulk_prepare_enable() in mtk_pcie_en7581_power_up()

[Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>]

On Sat, Nov 09, 2024 at 10:28:38AM +0100, Lorenzo Bianconi wrote:
> Squash clk_bulk_prepare() and clk_bulk_enable() in
> clk_bulk_prepare_enable() in mtk_pcie_en7581_power_up() routine
> 

Perhaps use something like,

"Replace clk_bulk_prepare() and clk_bulk_enable() with clk_bulk_prepare_enable()
in mtk_pcie_en7581_power_up()."

'Squash' doesn't sound right since you are not squashing any code.

> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> ---
>  drivers/pci/controller/pcie-mediatek-gen3.c | 14 +++-----------
>  1 file changed, 3 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c
> index 0fac0b9fd785e463d26d29d695b923db41eef9cc..8c8c733a145634cdbfefd339f4a692f25a6e24de 100644
> --- a/drivers/pci/controller/pcie-mediatek-gen3.c
> +++ b/drivers/pci/controller/pcie-mediatek-gen3.c
> @@ -903,12 +903,6 @@ static int mtk_pcie_en7581_power_up(struct mtk_gen3_pcie *pcie)
>  	pm_runtime_enable(dev);
>  	pm_runtime_get_sync(dev);
>  
> -	err = clk_bulk_prepare(pcie->num_clks, pcie->clks);
> -	if (err) {
> -		dev_err(dev, "failed to prepare clock\n");
> -		goto err_clk_prepare;
> -	}
> -
>  	val = FIELD_PREP(PCIE_VAL_LN0_DOWNSTREAM, 0x47) |
>  	      FIELD_PREP(PCIE_VAL_LN1_DOWNSTREAM, 0x47) |
>  	      FIELD_PREP(PCIE_VAL_LN0_UPSTREAM, 0x41) |
> @@ -921,17 +915,15 @@ static int mtk_pcie_en7581_power_up(struct mtk_gen3_pcie *pcie)
>  	      FIELD_PREP(PCIE_K_FINETUNE_MAX, 0xf);
>  	writel_relaxed(val, pcie->base + PCIE_PIPE4_PIE8_REG);
>  
> -	err = clk_bulk_enable(pcie->num_clks, pcie->clks);
> +	err = clk_bulk_prepare_enable(pcie->num_clks, pcie->clks);
>  	if (err) {
>  		dev_err(dev, "failed to prepare clock\n");
> -		goto err_clk_enable;
> +		goto err_clk_init;

err_clk_prepare_enable?

But I usually prefer err labels to be named after their purpose. Like here,
'err_runtime_put_reset' so it gives the reader a sense of what the label is
supposed to do.

However, to keep the existing sematics, you can just name it
err_clk_prepare_enable.

- Mani

>  	}
>  
>  	return 0;
>  
> -err_clk_enable:
> -	clk_bulk_unprepare(pcie->num_clks, pcie->clks);
> -err_clk_prepare:
> +err_clk_init:
>  	pm_runtime_put_sync(dev);
>  	pm_runtime_disable(dev);
>  	reset_control_assert(pcie->mac_reset);
> 
> -- 
> 2.47.0
> 

-- 
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