[v4] Enahance SVS's robustness

[PATCH v4 12/14] soc: mediatek: mtk-svs: use svs get efuse common function

Posted by Roger Lu 1 year, 10 months ago

SVS might need to read both svs efuse and thermal efuse on the probe flow.
Therefore, add a common efuse read function to remove the superfluous
codes.

Signed-off-by: Roger Lu <roger.lu@mediatek.com>
---
 drivers/soc/mediatek/mtk-svs.c | 69 ++++++++++++----------------------
 1 file changed, 24 insertions(+), 45 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
index bd23d1111d7b..a7f0a6f02d52 100644
--- a/drivers/soc/mediatek/mtk-svs.c
+++ b/drivers/soc/mediatek/mtk-svs.c
@@ -1758,26 +1758,28 @@ static int svs_bank_resource_setup(struct svs_platform *svsp)
 	return 0;
 }
 
-static int svs_thermal_efuse_get_data(struct svs_platform *svsp)
+static int svs_get_efuse_data(struct svs_platform *svsp,
+			      const char *nvmem_cell_name,
+			      u32 **svsp_efuse, size_t *svsp_efuse_max)
 {
 	struct nvmem_cell *cell;
 
-	/* Thermal efuse parsing */
-	cell = nvmem_cell_get(svsp->dev, "t-calibration-data");
+	cell = nvmem_cell_get(svsp->dev, nvmem_cell_name);
 	if (IS_ERR_OR_NULL(cell)) {
-		dev_err(svsp->dev, "no \"t-calibration-data\"? %ld\n", PTR_ERR(cell));
+		dev_err(svsp->dev, "no \"%s\"? %ld\n",
+			nvmem_cell_name, PTR_ERR(cell));
 		return PTR_ERR(cell);
 	}
 
-	svsp->tefuse = nvmem_cell_read(cell, &svsp->tefuse_max);
-	if (IS_ERR(svsp->tefuse)) {
-		dev_err(svsp->dev, "cannot read thermal efuse: %ld\n",
-			PTR_ERR(svsp->tefuse));
+	*svsp_efuse = nvmem_cell_read(cell, svsp_efuse_max);
+	if (IS_ERR(*svsp_efuse)) {
+		dev_err(svsp->dev, "cannot read \"%s\" efuse: %ld\n",
+			nvmem_cell_name, PTR_ERR(*svsp_efuse));
 		nvmem_cell_put(cell);
-		return PTR_ERR(svsp->tefuse);
+		return PTR_ERR(*svsp_efuse);
 	}
 
-	svsp->tefuse_max /= sizeof(u32);
+	*svsp_efuse_max /= sizeof(u32);
 	nvmem_cell_put(cell);
 
 	return 0;
@@ -1825,7 +1827,8 @@ static bool svs_mt8192_efuse_parsing(struct svs_platform *svsp)
 		svsb->vmax += svsb->dvt_fixed;
 	}
 
-	ret = svs_thermal_efuse_get_data(svsp);
+	ret = svs_get_efuse_data(svsp, "t-calibration-data",
+				 &svsp->tefuse, &svsp->tefuse_max);
 	if (ret)
 		return false;
 
@@ -1930,7 +1933,8 @@ static bool svs_mt8183_efuse_parsing(struct svs_platform *svsp)
 		}
 	}
 
-	ret = svs_thermal_efuse_get_data(svsp);
+	ret = svs_get_efuse_data(svsp, "t-calibration-data",
+				 &svsp->tefuse, &svsp->tefuse_max);
 	if (ret)
 		return false;
 
@@ -2039,32 +2043,6 @@ static bool svs_mt8183_efuse_parsing(struct svs_platform *svsp)
 	return true;
 }
 
-static bool svs_is_efuse_data_correct(struct svs_platform *svsp)
-{
-	struct nvmem_cell *cell;
-
-	/* Get svs efuse by nvmem */
-	cell = nvmem_cell_get(svsp->dev, "svs-calibration-data");
-	if (IS_ERR(cell)) {
-		dev_err(svsp->dev, "no \"svs-calibration-data\"? %ld\n",
-			PTR_ERR(cell));
-		return false;
-	}
-
-	svsp->efuse = nvmem_cell_read(cell, &svsp->efuse_max);
-	if (IS_ERR(svsp->efuse)) {
-		dev_err(svsp->dev, "cannot read svs efuse: %ld\n",
-			PTR_ERR(svsp->efuse));
-		nvmem_cell_put(cell);
-		return false;
-	}
-
-	svsp->efuse_max /= sizeof(u32);
-	nvmem_cell_put(cell);
-
-	return true;
-}
-
 static struct device *svs_get_subsys_device(struct svs_platform *svsp,
 					    const char *node_name)
 {
@@ -2404,8 +2382,9 @@ static int svs_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	if (!svs_is_efuse_data_correct(svsp)) {
-		dev_notice(svsp->dev, "efuse data isn't correct\n");
+	ret = svs_get_efuse_data(svsp, "svs-calibration-data",
+				 &svsp->efuse, &svsp->efuse_max);
+	if (ret) {
 		ret = -EPERM;
 		goto svs_probe_free_efuse;
 	}
@@ -2413,13 +2392,13 @@ static int svs_probe(struct platform_device *pdev)
 	if (!svsp_data->efuse_parsing(svsp)) {
 		dev_err(svsp->dev, "efuse data parsing failed\n");
 		ret = -EPERM;
-		goto svs_probe_free_resource;
+		goto svs_probe_free_tefuse;
 	}
 
 	ret = svs_bank_resource_setup(svsp);
 	if (ret) {
 		dev_err(svsp->dev, "svs bank resource setup fail: %d\n", ret);
-		goto svs_probe_free_resource;
+		goto svs_probe_free_tefuse;
 	}
 
 	svsp->main_clk = devm_clk_get(svsp->dev, "main");
@@ -2427,12 +2406,12 @@ static int svs_probe(struct platform_device *pdev)
 		dev_err(svsp->dev, "failed to get clock: %ld\n",
 			PTR_ERR(svsp->main_clk));
 		ret = PTR_ERR(svsp->main_clk);
-		goto svs_probe_free_resource;
+		goto svs_probe_free_tefuse;
 	}
 
 	ret = svs_clk_enable(svsp);
 	if (ret)
-		goto svs_probe_free_resource;
+		goto svs_probe_free_tefuse;
 
 	svsp->base = of_iomap(svsp->dev->of_node, 0);
 	if (IS_ERR_OR_NULL(svsp->base)) {
@@ -2477,7 +2456,7 @@ static int svs_probe(struct platform_device *pdev)
 svs_probe_clk_disable:
 	svs_clk_disable(svsp);
 
-svs_probe_free_resource:
+svs_probe_free_tefuse:
 	if (!IS_ERR_OR_NULL(svsp->tefuse))
 		kfree(svsp->tefuse);
 
-- 
2.18.0

Re: [PATCH v4 12/14] soc: mediatek: mtk-svs: use svs get efuse common function

Posted by Matthias Brugger 1 year, 9 months ago


On 11/01/2023 08:45, Roger Lu wrote:
> SVS might need to read both svs efuse and thermal efuse on the probe flow.
> Therefore, add a common efuse read function to remove the superfluous
> codes.
> 
> Signed-off-by: Roger Lu <roger.lu@mediatek.com>

Looks good to me, could you please rebase.

Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

> ---
>   drivers/soc/mediatek/mtk-svs.c | 69 ++++++++++++----------------------
>   1 file changed, 24 insertions(+), 45 deletions(-)
> 
> diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
> index bd23d1111d7b..a7f0a6f02d52 100644
> --- a/drivers/soc/mediatek/mtk-svs.c
> +++ b/drivers/soc/mediatek/mtk-svs.c
> @@ -1758,26 +1758,28 @@ static int svs_bank_resource_setup(struct svs_platform *svsp)
>   	return 0;
>   }
>   
> -static int svs_thermal_efuse_get_data(struct svs_platform *svsp)
> +static int svs_get_efuse_data(struct svs_platform *svsp,
> +			      const char *nvmem_cell_name,
> +			      u32 **svsp_efuse, size_t *svsp_efuse_max)
>   {
>   	struct nvmem_cell *cell;
>   
> -	/* Thermal efuse parsing */
> -	cell = nvmem_cell_get(svsp->dev, "t-calibration-data");
> +	cell = nvmem_cell_get(svsp->dev, nvmem_cell_name);
>   	if (IS_ERR_OR_NULL(cell)) {
> -		dev_err(svsp->dev, "no \"t-calibration-data\"? %ld\n", PTR_ERR(cell));
> +		dev_err(svsp->dev, "no \"%s\"? %ld\n",
> +			nvmem_cell_name, PTR_ERR(cell));
>   		return PTR_ERR(cell);
>   	}
>   
> -	svsp->tefuse = nvmem_cell_read(cell, &svsp->tefuse_max);
> -	if (IS_ERR(svsp->tefuse)) {
> -		dev_err(svsp->dev, "cannot read thermal efuse: %ld\n",
> -			PTR_ERR(svsp->tefuse));
> +	*svsp_efuse = nvmem_cell_read(cell, svsp_efuse_max);
> +	if (IS_ERR(*svsp_efuse)) {
> +		dev_err(svsp->dev, "cannot read \"%s\" efuse: %ld\n",
> +			nvmem_cell_name, PTR_ERR(*svsp_efuse));
>   		nvmem_cell_put(cell);
> -		return PTR_ERR(svsp->tefuse);
> +		return PTR_ERR(*svsp_efuse);
>   	}
>   
> -	svsp->tefuse_max /= sizeof(u32);
> +	*svsp_efuse_max /= sizeof(u32);
>   	nvmem_cell_put(cell);
>   
>   	return 0;
> @@ -1825,7 +1827,8 @@ static bool svs_mt8192_efuse_parsing(struct svs_platform *svsp)
>   		svsb->vmax += svsb->dvt_fixed;
>   	}
>   
> -	ret = svs_thermal_efuse_get_data(svsp);
> +	ret = svs_get_efuse_data(svsp, "t-calibration-data",
> +				 &svsp->tefuse, &svsp->tefuse_max);
>   	if (ret)
>   		return false;
>   
> @@ -1930,7 +1933,8 @@ static bool svs_mt8183_efuse_parsing(struct svs_platform *svsp)
>   		}
>   	}
>   
> -	ret = svs_thermal_efuse_get_data(svsp);
> +	ret = svs_get_efuse_data(svsp, "t-calibration-data",
> +				 &svsp->tefuse, &svsp->tefuse_max);
>   	if (ret)
>   		return false;
>   
> @@ -2039,32 +2043,6 @@ static bool svs_mt8183_efuse_parsing(struct svs_platform *svsp)
>   	return true;
>   }
>   
> -static bool svs_is_efuse_data_correct(struct svs_platform *svsp)
> -{
> -	struct nvmem_cell *cell;
> -
> -	/* Get svs efuse by nvmem */
> -	cell = nvmem_cell_get(svsp->dev, "svs-calibration-data");
> -	if (IS_ERR(cell)) {
> -		dev_err(svsp->dev, "no \"svs-calibration-data\"? %ld\n",
> -			PTR_ERR(cell));
> -		return false;
> -	}
> -
> -	svsp->efuse = nvmem_cell_read(cell, &svsp->efuse_max);
> -	if (IS_ERR(svsp->efuse)) {
> -		dev_err(svsp->dev, "cannot read svs efuse: %ld\n",
> -			PTR_ERR(svsp->efuse));
> -		nvmem_cell_put(cell);
> -		return false;
> -	}
> -
> -	svsp->efuse_max /= sizeof(u32);
> -	nvmem_cell_put(cell);
> -
> -	return true;
> -}
> -
>   static struct device *svs_get_subsys_device(struct svs_platform *svsp,
>   					    const char *node_name)
>   {
> @@ -2404,8 +2382,9 @@ static int svs_probe(struct platform_device *pdev)
>   	if (ret)
>   		return ret;
>   
> -	if (!svs_is_efuse_data_correct(svsp)) {
> -		dev_notice(svsp->dev, "efuse data isn't correct\n");
> +	ret = svs_get_efuse_data(svsp, "svs-calibration-data",
> +				 &svsp->efuse, &svsp->efuse_max);
> +	if (ret) {
>   		ret = -EPERM;
>   		goto svs_probe_free_efuse;
>   	}
> @@ -2413,13 +2392,13 @@ static int svs_probe(struct platform_device *pdev)
>   	if (!svsp_data->efuse_parsing(svsp)) {
>   		dev_err(svsp->dev, "efuse data parsing failed\n");
>   		ret = -EPERM;
> -		goto svs_probe_free_resource;
> +		goto svs_probe_free_tefuse;
>   	}
>   
>   	ret = svs_bank_resource_setup(svsp);
>   	if (ret) {
>   		dev_err(svsp->dev, "svs bank resource setup fail: %d\n", ret);
> -		goto svs_probe_free_resource;
> +		goto svs_probe_free_tefuse;
>   	}
>   
>   	svsp->main_clk = devm_clk_get(svsp->dev, "main");
> @@ -2427,12 +2406,12 @@ static int svs_probe(struct platform_device *pdev)
>   		dev_err(svsp->dev, "failed to get clock: %ld\n",
>   			PTR_ERR(svsp->main_clk));
>   		ret = PTR_ERR(svsp->main_clk);
> -		goto svs_probe_free_resource;
> +		goto svs_probe_free_tefuse;
>   	}
>   
>   	ret = svs_clk_enable(svsp);
>   	if (ret)
> -		goto svs_probe_free_resource;
> +		goto svs_probe_free_tefuse;
>   
>   	svsp->base = of_iomap(svsp->dev->of_node, 0);
>   	if (IS_ERR_OR_NULL(svsp->base)) {
> @@ -2477,7 +2456,7 @@ static int svs_probe(struct platform_device *pdev)
>   svs_probe_clk_disable:
>   	svs_clk_disable(svsp);
>   
> -svs_probe_free_resource:
> +svs_probe_free_tefuse:
>   	if (!IS_ERR_OR_NULL(svsp->tefuse))
>   		kfree(svsp->tefuse);
>

Re: [PATCH v4 12/14] soc: mediatek: mtk-svs: use svs get efuse common function

Posted by Roger Lu (陸瑞傑) 1 year, 9 months ago

Hi Matthias Sir,

On Tue, 2023-01-31 at 14:37 +0100, Matthias Brugger wrote:
> 
> On 11/01/2023 08:45, Roger Lu wrote:
> > SVS might need to read both svs efuse and thermal efuse on the probe flow.
> > Therefore, add a common efuse read function to remove the superfluous
> > codes.
> > 
> > Signed-off-by: Roger Lu <roger.lu@mediatek.com>
> 
> Looks good to me, could you please rebase.

No Problem, I'll rebase and resend it. Thanks.

> 
> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

... [snip] ...