Re: [PATCH 2/3] Input: snvs_pwrkey - use local device pointer avoid reference platform_device pointer every time

[Frank Li]

On Thu, Mar 26, 2026 at 06:39:39PM +0800, Joy Zou wrote:
> Make use of local struct device pointer to not dereference the
> platform_device pointer every time.


Input: snvs_pwrkey - use local device pointer to simple code

Use local struct device pointer to avoid reference the platform_device
pointer every time.

No functional change.

Frank

>
> Signed-off-by: Joy Zou <joy.zou@xxxxxxx>
> ---
>  drivers/input/keyboard/snvs_pwrkey.c | 41 ++++++++++++++++++------------------
>  1 file changed, 21 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/input/keyboard/snvs_pwrkey.c b/drivers/input/keyboard/snvs_pwrkey.c
> index 836ab94c160615f4b0f645d9b9f85d54638c2624..bab3ab57fdac77256be75a080773ea99372ec9c7 100644
> --- a/drivers/input/keyboard/snvs_pwrkey.c
> +++ b/drivers/input/keyboard/snvs_pwrkey.c
> @@ -112,6 +112,7 @@ static void imx_snvs_pwrkey_act(void *pdata)
>
>  static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
>  {
> +	struct device *dev = &pdev->dev;
>  	struct pwrkey_drv_data *pdata;
>  	struct input_dev *input;
>  	struct device_node *np;
> @@ -122,33 +123,33 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
>  	u32 vid;
>
>  	/* Get SNVS register Page */
> -	np = pdev->dev.of_node;
> +	np = dev->of_node;
>  	if (!np)
> -		return dev_err_probe(&pdev->dev, -ENODEV, "Device tree node not found\n");
> +		return dev_err_probe(dev, -ENODEV, "Device tree node not found\n");
>
> -	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
> +	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
>  	if (!pdata)
>  		return -ENOMEM;
>
>  	pdata->snvs = syscon_regmap_lookup_by_phandle(np, "regmap");
>  	if (IS_ERR(pdata->snvs))
> -		return dev_err_probe(&pdev->dev, PTR_ERR(pdata->snvs), "Can't get snvs syscon\n");
> +		return dev_err_probe(dev, PTR_ERR(pdata->snvs), "Can't get snvs syscon\n");
>
>  	if (of_property_read_u32(np, "linux,keycode", &pdata->keycode)) {
>  		pdata->keycode = KEY_POWER;
> -		dev_warn(&pdev->dev, "KEY_POWER without setting in dts\n");
> +		dev_warn(dev, "KEY_POWER without setting in dts\n");
>  	}
>
> -	clk = devm_clk_get_optional_enabled(&pdev->dev, NULL);
> +	clk = devm_clk_get_optional_enabled(dev, NULL);
>  	if (IS_ERR(clk))
> -		return dev_err_probe(&pdev->dev, PTR_ERR(clk),
> +		return dev_err_probe(dev, PTR_ERR(clk),
>  				     "Failed to get snvs clock (%pe)\n", clk);
>
>  	pdata->wakeup = of_property_read_bool(np, "wakeup-source");
>
>  	pdata->irq = platform_get_irq(pdev, 0);
>  	if (pdata->irq < 0)
> -		return dev_err_probe(&pdev->dev, -EINVAL, "Failed to get interrupt\n");
> +		return dev_err_probe(dev, -EINVAL, "Failed to get interrupt\n");
>
>  	error = of_property_read_u32(np, "power-off-time-sec", &val);
>  	if (!error) {
> @@ -162,7 +163,7 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
>  			bpt = (val / 5) - 1;
>  			break;
>  		default:
> -			return dev_err_probe(&pdev->dev, -EINVAL,
> +			return dev_err_probe(dev, -EINVAL,
>  					     "power-off-time-sec %d out of range\n", val);
>  		}
>
> @@ -182,7 +183,7 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
>
>  	input = devm_input_allocate_device(&pdev->dev);
>  	if (!input) {
> -		dev_err(&pdev->dev, "failed to allocate the input device\n");
> +		dev_err(dev, "failed to allocate the input device\n");
>  		return -ENOMEM;
>  	}
>
> @@ -193,27 +194,27 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
>  	input_set_capability(input, EV_KEY, pdata->keycode);
>
>  	/* input customer action to cancel release timer */
> -	error = devm_add_action(&pdev->dev, imx_snvs_pwrkey_act, pdata);
> +	error = devm_add_action(dev, imx_snvs_pwrkey_act, pdata);
>  	if (error)
> -		return dev_err_probe(&pdev->dev, error, "failed to register remove action\n");
> +		return dev_err_probe(dev, error, "failed to register remove action\n");
>
>  	pdata->input = input;
>  	platform_set_drvdata(pdev, pdata);
>
> -	error = devm_request_irq(&pdev->dev, pdata->irq,
> -			       imx_snvs_pwrkey_interrupt,
> -			       0, pdev->name, pdev);
> +	error = devm_request_irq(dev, pdata->irq,
> +				 imx_snvs_pwrkey_interrupt,
> +				 0, pdev->name, pdev);
>  	if (error)
> -		return dev_err_probe(&pdev->dev, error, "interrupt not available.\n");
> +		return dev_err_probe(dev, error, "interrupt not available.\n");
>
>  	error = input_register_device(input);
>  	if (error < 0)
> -		return dev_err_probe(&pdev->dev, error, "failed to register input device\n");
> +		return dev_err_probe(dev, error, "failed to register input device\n");
>
> -	device_init_wakeup(&pdev->dev, pdata->wakeup);
> -	error = dev_pm_set_wake_irq(&pdev->dev, pdata->irq);
> +	device_init_wakeup(dev, pdata->wakeup);
> +	error = dev_pm_set_wake_irq(dev, pdata->irq);
>  	if (error)
> -		dev_err(&pdev->dev, "irq wake enable failed.\n");
> +		dev_err(dev, "irq wake enable failed.\n");
>
>  	return 0;
>  }
>
> --
> 2.37.1
>