drm/hisilicon: Use devm_platform_get_and_ioremap_resource() in dsi_parse_dt()

[PATCH] drm/hisilicon: Use devm_platform_get_and_ioremap_resource() in dsi_parse_dt()

Posted by Markus Elfring 2 years ago

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Mon, 5 Feb 2024 08:58:21 +0100

A wrapper function is available since the commit 890cc39a879906b63912482dfc41944579df2dc6
("drivers: provide devm_platform_get_and_ioremap_resource()").
Thus reuse existing functionality instead of keeping duplicate source code.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
index 566de4658719..1edf429c49d7 100644
--- a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
+++ b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
@@ -834,8 +834,7 @@ static int dsi_parse_dt(struct platform_device *pdev, struct dw_dsi *dsi)
 		return PTR_ERR(ctx->pclk);
 	}

-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	ctx->base = devm_ioremap_resource(&pdev->dev, res);
+	ctx->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(ctx->base)) {
 		DRM_ERROR("failed to remap dsi io region\n");
 		return PTR_ERR(ctx->base);
--
2.43.0

Re: [PATCH] drm/hisilicon: Use devm_platform_get_and_ioremap_resource() in dsi_parse_dt()

Posted by Doug Anderson 2 years ago

Hi,

On Mon, Feb 5, 2024 at 12:13 AM Markus Elfring <Markus.Elfring@web.de> wrote:
>
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Mon, 5 Feb 2024 08:58:21 +0100
>
> A wrapper function is available since the commit 890cc39a879906b63912482dfc41944579df2dc6
> ("drivers: provide devm_platform_get_and_ioremap_resource()").
> Thus reuse existing functionality instead of keeping duplicate source code.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---
>  drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
> index 566de4658719..1edf429c49d7 100644
> --- a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
> +++ b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
> @@ -834,8 +834,7 @@ static int dsi_parse_dt(struct platform_device *pdev, struct dw_dsi *dsi)
>                 return PTR_ERR(ctx->pclk);
>         }
>
> -       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -       ctx->base = devm_ioremap_resource(&pdev->dev, res);
> +       ctx->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
>         if (IS_ERR(ctx->base)) {
>                 DRM_ERROR("failed to remap dsi io region\n");
>                 return PTR_ERR(ctx->base);

This function no longer needs the local variable "res". Remove it and
then change the function call to devm_platform_ioremap_resource().
With that:

Reviewed-by: Douglas Anderson <dianders@chromium.org>

[PATCH v2] drm/hisilicon: Use devm_platform_ioremap_resource() in dsi_parse_dt()

Posted by Markus Elfring 2 years ago

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 6 Feb 2024 19:51:25 +0100

A wrapper function is available since the commit 7945f929f1a77a1c8887a97ca07f87626858ff42
("drivers: provide devm_platform_ioremap_resource()").

* Thus reuse existing functionality instead of keeping duplicate source code.

* Delete a local variable which became unnecessary with this refactoring.


This issue was transformed by using the Coccinelle software.

Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---

v2:
The transformation pattern was adjusted based on advices by known contributors.

Examples:
* Douglas Anderson
* Geert Uytterhoeven
* Robin Murphy


 drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
index 566de4658719..6db6f355394c 100644
--- a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
+++ b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
@@ -826,7 +826,6 @@ static const struct component_ops dsi_ops = {
 static int dsi_parse_dt(struct platform_device *pdev, struct dw_dsi *dsi)
 {
 	struct dsi_hw_ctx *ctx = dsi->ctx;
-	struct resource *res;

 	ctx->pclk = devm_clk_get(&pdev->dev, "pclk");
 	if (IS_ERR(ctx->pclk)) {
@@ -834,8 +833,7 @@ static int dsi_parse_dt(struct platform_device *pdev, struct dw_dsi *dsi)
 		return PTR_ERR(ctx->pclk);
 	}

-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	ctx->base = devm_ioremap_resource(&pdev->dev, res);
+	ctx->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(ctx->base)) {
 		DRM_ERROR("failed to remap dsi io region\n");
 		return PTR_ERR(ctx->base);
--
2.43.0

Re: [PATCH] drm/hisilicon: Use devm_platform_get_and_ioremap_resource() in dsi_parse_dt()

Posted by John Stultz 2 years ago

On Mon, Feb 5, 2024 at 12:13 AM Markus Elfring <Markus.Elfring@web.de> wrote:
>
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Mon, 5 Feb 2024 08:58:21 +0100
>
> A wrapper function is available since the commit 890cc39a879906b63912482dfc41944579df2dc6
> ("drivers: provide devm_platform_get_and_ioremap_resource()").
> Thus reuse existing functionality instead of keeping duplicate source code.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>

I no longer have hardware to test with this, but this looks reasonable to me.

Acked-by: John Stultz <jstultz@google.com>

thanks
-john