[PATCH v4 1/6] cpufreq: sun50i: add efuse_xlate to get efuse version.

[PATCH v4 1/6] cpufreq: sun50i: add efuse_xlate to get efuse version.

[Shuosheng Huang]

It's better to use efuse_xlate to extract the differentiated part
regarding different SoC.

Signed-off-by: Shuosheng Huang <huangshuosheng@allwinnertech.com>
---
 drivers/cpufreq/sun50i-cpufreq-nvmem.c | 82 ++++++++++++++++----------
 1 file changed, 51 insertions(+), 31 deletions(-)

diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
index 9907a165135b..3c0531938d1a 100644
--- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c
+++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
@@ -19,24 +19,51 @@
 
 #define MAX_NAME_LEN	7
 
-#define NVMEM_MASK	0x7
-#define NVMEM_SHIFT	5
+#define SUN50I_H6_NVMEM_MASK		0x7
+#define SUN50I_H6_NVMEM_SHIFT		5
+
+struct sunxi_cpufreq_soc_data {
+	int (*efuse_xlate)(struct nvmem_cell *speedbin_nvmem);
+};
 
 static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev;
 
+static int sun50i_h6_efuse_xlate(struct nvmem_cell *speedbin_nvmem)
+{
+	size_t len;
+	u32 *speedbin;
+	u32 efuse_value;
+
+	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+	if (IS_ERR(speedbin))
+		return PTR_ERR(speedbin);
+
+	efuse_value = (*(u32 *)speedbin >> SUN50I_H6_NVMEM_SHIFT) &
+			  SUN50I_H6_NVMEM_MASK;
+	kfree(speedbin);
+	/*
+	 * We treat unexpected efuse values as if the SoC was from
+	 * the slowest bin. Expected efuse values are 1-3, slowest
+	 * to fastest.
+	 */
+	if (efuse_value >= 1 && efuse_value <= 3)
+		return efuse_value - 1;
+	else
+		return 0;
+}
+
 /**
  * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value
- * @versions: Set to the value parsed from efuse
+ * @soc_data: pointer to sunxi_cpufreq_soc_data context
  *
  * Returns 0 if success.
  */
-static int sun50i_cpufreq_get_efuse(u32 *versions)
+static int sun50i_cpufreq_get_efuse(const struct sunxi_cpufreq_soc_data *soc_data)
 {
 	struct nvmem_cell *speedbin_nvmem;
 	struct device_node *np;
 	struct device *cpu_dev;
-	u32 *speedbin, efuse_value;
-	size_t len;
+	int versions;
 	int ret;
 
 	cpu_dev = get_cpu_device(0);
@@ -63,43 +90,33 @@ static int sun50i_cpufreq_get_efuse(u32 *versions)
 		return PTR_ERR(speedbin_nvmem);
 	}
 
-	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+	versions = soc_data->efuse_xlate(speedbin_nvmem);
 	nvmem_cell_put(speedbin_nvmem);
-	if (IS_ERR(speedbin))
-		return PTR_ERR(speedbin);
-
-	efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK;
-
-	/*
-	 * We treat unexpected efuse values as if the SoC was from
-	 * the slowest bin. Expected efuse values are 1-3, slowest
-	 * to fastest.
-	 */
-	if (efuse_value >= 1 && efuse_value <= 3)
-		*versions = efuse_value - 1;
-	else
-		*versions = 0;
 
-	kfree(speedbin);
-	return 0;
+	return versions;
 };
 
 static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
 {
+	const struct of_device_id *match;
 	struct opp_table **opp_tables;
 	char name[MAX_NAME_LEN];
 	unsigned int cpu;
-	u32 speed = 0;
+	int speed = 0;
 	int ret;
 
+	match = dev_get_platdata(&pdev->dev);
+	if (!match)
+		return -EINVAL;
+
 	opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables),
 			     GFP_KERNEL);
 	if (!opp_tables)
 		return -ENOMEM;
 
-	ret = sun50i_cpufreq_get_efuse(&speed);
-	if (ret)
-		return ret;
+	speed = sun50i_cpufreq_get_efuse(match->data);
+	if (speed < 0)
+		return speed;
 
 	snprintf(name, MAX_NAME_LEN, "speed%d", speed);
 
@@ -163,8 +180,12 @@ static struct platform_driver sun50i_cpufreq_driver = {
 	},
 };
 
+static const struct sunxi_cpufreq_soc_data sun50i_h6_data = {
+	.efuse_xlate = sun50i_h6_efuse_xlate,
+};
+
 static const struct of_device_id sun50i_cpufreq_match_list[] = {
-	{ .compatible = "allwinner,sun50i-h6" },
+	{ .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data },
 	{}
 };
 
@@ -198,9 +219,8 @@ static int __init sun50i_cpufreq_init(void)
 	if (unlikely(ret < 0))
 		return ret;
 
-	sun50i_cpufreq_pdev =
-		platform_device_register_simple("sun50i-cpufreq-nvmem",
-						-1, NULL, 0);
+	sun50i_cpufreq_pdev = platform_device_register_data(NULL,
+		"sun50i-cpufreq-nvmem", -1, match, sizeof(*match));
 	ret = PTR_ERR_OR_ZERO(sun50i_cpufreq_pdev);
 	if (ret == 0)
 		return 0;
-- 
2.28.0

[PATCH v4 1/6] cpufreq: sun50i: add efuse_xlate to get efuse version.

[Shuosheng Huang]

It's better to use efuse_xlate to extract the differentiated part
regarding different SoC.

Signed-off-by: Shuosheng Huang <huangshuosheng@allwinnertech.com>
---
 drivers/cpufreq/sun50i-cpufreq-nvmem.c | 82 ++++++++++++++++----------
 1 file changed, 51 insertions(+), 31 deletions(-)

diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
index 9907a165135b..3c0531938d1a 100644
--- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c
+++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
@@ -19,24 +19,51 @@
 
 #define MAX_NAME_LEN	7
 
-#define NVMEM_MASK	0x7
-#define NVMEM_SHIFT	5
+#define SUN50I_H6_NVMEM_MASK		0x7
+#define SUN50I_H6_NVMEM_SHIFT		5
+
+struct sunxi_cpufreq_soc_data {
+	int (*efuse_xlate)(struct nvmem_cell *speedbin_nvmem);
+};
 
 static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev;
 
+static int sun50i_h6_efuse_xlate(struct nvmem_cell *speedbin_nvmem)
+{
+	size_t len;
+	u32 *speedbin;
+	u32 efuse_value;
+
+	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+	if (IS_ERR(speedbin))
+		return PTR_ERR(speedbin);
+
+	efuse_value = (*(u32 *)speedbin >> SUN50I_H6_NVMEM_SHIFT) &
+			  SUN50I_H6_NVMEM_MASK;
+	kfree(speedbin);
+	/*
+	 * We treat unexpected efuse values as if the SoC was from
+	 * the slowest bin. Expected efuse values are 1-3, slowest
+	 * to fastest.
+	 */
+	if (efuse_value >= 1 && efuse_value <= 3)
+		return efuse_value - 1;
+	else
+		return 0;
+}
+
 /**
  * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value
- * @versions: Set to the value parsed from efuse
+ * @soc_data: pointer to sunxi_cpufreq_soc_data context
  *
  * Returns 0 if success.
  */
-static int sun50i_cpufreq_get_efuse(u32 *versions)
+static int sun50i_cpufreq_get_efuse(const struct sunxi_cpufreq_soc_data *soc_data)
 {
 	struct nvmem_cell *speedbin_nvmem;
 	struct device_node *np;
 	struct device *cpu_dev;
-	u32 *speedbin, efuse_value;
-	size_t len;
+	int versions;
 	int ret;
 
 	cpu_dev = get_cpu_device(0);
@@ -63,43 +90,33 @@ static int sun50i_cpufreq_get_efuse(u32 *versions)
 		return PTR_ERR(speedbin_nvmem);
 	}
 
-	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+	versions = soc_data->efuse_xlate(speedbin_nvmem);
 	nvmem_cell_put(speedbin_nvmem);
-	if (IS_ERR(speedbin))
-		return PTR_ERR(speedbin);
-
-	efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK;
-
-	/*
-	 * We treat unexpected efuse values as if the SoC was from
-	 * the slowest bin. Expected efuse values are 1-3, slowest
-	 * to fastest.
-	 */
-	if (efuse_value >= 1 && efuse_value <= 3)
-		*versions = efuse_value - 1;
-	else
-		*versions = 0;
 
-	kfree(speedbin);
-	return 0;
+	return versions;
 };
 
 static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
 {
+	const struct of_device_id *match;
 	struct opp_table **opp_tables;
 	char name[MAX_NAME_LEN];
 	unsigned int cpu;
-	u32 speed = 0;
+	int speed = 0;
 	int ret;
 
+	match = dev_get_platdata(&pdev->dev);
+	if (!match)
+		return -EINVAL;
+
 	opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables),
 			     GFP_KERNEL);
 	if (!opp_tables)
 		return -ENOMEM;
 
-	ret = sun50i_cpufreq_get_efuse(&speed);
-	if (ret)
-		return ret;
+	speed = sun50i_cpufreq_get_efuse(match->data);
+	if (speed < 0)
+		return speed;
 
 	snprintf(name, MAX_NAME_LEN, "speed%d", speed);
 
@@ -163,8 +180,12 @@ static struct platform_driver sun50i_cpufreq_driver = {
 	},
 };
 
+static const struct sunxi_cpufreq_soc_data sun50i_h6_data = {
+	.efuse_xlate = sun50i_h6_efuse_xlate,
+};
+
 static const struct of_device_id sun50i_cpufreq_match_list[] = {
-	{ .compatible = "allwinner,sun50i-h6" },
+	{ .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data },
 	{}
 };
 
@@ -198,9 +219,8 @@ static int __init sun50i_cpufreq_init(void)
 	if (unlikely(ret < 0))
 		return ret;
 
-	sun50i_cpufreq_pdev =
-		platform_device_register_simple("sun50i-cpufreq-nvmem",
-						-1, NULL, 0);
+	sun50i_cpufreq_pdev = platform_device_register_data(NULL,
+		"sun50i-cpufreq-nvmem", -1, match, sizeof(*match));
 	ret = PTR_ERR_OR_ZERO(sun50i_cpufreq_pdev);
 	if (ret == 0)
 		return 0;
-- 
2.28.0


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Re: [PATCH v4 1/6] cpufreq: sun50i: add efuse_xlate to get efuse version.

[Viresh Kumar]

Please use --thread=shallow while creating the patches, I use the following
options normally, so they appear as a thread.

git format-patch -C -M --thread=shallow

-- 
viresh

Re: [PATCH v4 1/6] cpufreq: sun50i: add efuse_xlate to get efuse version.

[Viresh Kumar]

Please use --thread=shallow while creating the patches, I use the following
options normally, so they appear as a thread.

git format-patch -C -M --thread=shallow

-- 
viresh

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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v4 1/6] cpufreq: sun50i: add efuse_xlate to get efuse version.

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 4872 bytes --]

Hi,

On Tue, Dec 08, 2020 at 03:19:28PM +0800, Shuosheng Huang wrote:
> It's better to use efuse_xlate to extract the differentiated part
> regarding different SoC.
> 
> Signed-off-by: Shuosheng Huang <huangshuosheng@allwinnertech.com>

Please wait a bit for reviews before sending a new version. You've sent
three versions in a day, and I haven't reviewed the first one.

Also, please put a changelog in the cover letter, we don't have any way
to tell what is the difference between v1, v2, v3 and v4.

> ---
>  drivers/cpufreq/sun50i-cpufreq-nvmem.c | 82 ++++++++++++++++----------
>  1 file changed, 51 insertions(+), 31 deletions(-)
> 
> diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> index 9907a165135b..3c0531938d1a 100644
> --- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> +++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> @@ -19,24 +19,51 @@
>  
>  #define MAX_NAME_LEN	7
>  
> -#define NVMEM_MASK	0x7
> -#define NVMEM_SHIFT	5
> +#define SUN50I_H6_NVMEM_MASK		0x7
> +#define SUN50I_H6_NVMEM_SHIFT		5
> +
> +struct sunxi_cpufreq_soc_data {
> +	int (*efuse_xlate)(struct nvmem_cell *speedbin_nvmem);
> +};
>  
>  static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev;
>  
> +static int sun50i_h6_efuse_xlate(struct nvmem_cell *speedbin_nvmem)
> +{
> +	size_t len;
> +	u32 *speedbin;
> +	u32 efuse_value;
> +
> +	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
> +	if (IS_ERR(speedbin))
> +		return PTR_ERR(speedbin);
> +
> +	efuse_value = (*(u32 *)speedbin >> SUN50I_H6_NVMEM_SHIFT) &
> +			  SUN50I_H6_NVMEM_MASK;
> +	kfree(speedbin);
> +	/*
> +	 * We treat unexpected efuse values as if the SoC was from
> +	 * the slowest bin. Expected efuse values are 1-3, slowest
> +	 * to fastest.
> +	 */
> +	if (efuse_value >= 1 && efuse_value <= 3)
> +		return efuse_value - 1;
> +	else
> +		return 0;
> +}
> +
>  /**
>   * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value
> - * @versions: Set to the value parsed from efuse
> + * @soc_data: pointer to sunxi_cpufreq_soc_data context
>   *
>   * Returns 0 if success.
>   */
> -static int sun50i_cpufreq_get_efuse(u32 *versions)
> +static int sun50i_cpufreq_get_efuse(const struct sunxi_cpufreq_soc_data *soc_data)
>  {
>  	struct nvmem_cell *speedbin_nvmem;
>  	struct device_node *np;
>  	struct device *cpu_dev;
> -	u32 *speedbin, efuse_value;
> -	size_t len;
> +	int versions;
>  	int ret;
>  
>  	cpu_dev = get_cpu_device(0);
> @@ -63,43 +90,33 @@ static int sun50i_cpufreq_get_efuse(u32 *versions)
>  		return PTR_ERR(speedbin_nvmem);
>  	}
>  
> -	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
> +	versions = soc_data->efuse_xlate(speedbin_nvmem);
>  	nvmem_cell_put(speedbin_nvmem);
> -	if (IS_ERR(speedbin))
> -		return PTR_ERR(speedbin);
> -
> -	efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK;
> -
> -	/*
> -	 * We treat unexpected efuse values as if the SoC was from
> -	 * the slowest bin. Expected efuse values are 1-3, slowest
> -	 * to fastest.
> -	 */
> -	if (efuse_value >= 1 && efuse_value <= 3)
> -		*versions = efuse_value - 1;
> -	else
> -		*versions = 0;
>  
> -	kfree(speedbin);
> -	return 0;
> +	return versions;
>  };
>  
>  static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
>  {
> +	const struct of_device_id *match;
>  	struct opp_table **opp_tables;
>  	char name[MAX_NAME_LEN];
>  	unsigned int cpu;
> -	u32 speed = 0;
> +	int speed = 0;
>  	int ret;
>  
> +	match = dev_get_platdata(&pdev->dev);
> +	if (!match)
> +		return -EINVAL;
> +
>  	opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables),
>  			     GFP_KERNEL);
>  	if (!opp_tables)
>  		return -ENOMEM;
>  
> -	ret = sun50i_cpufreq_get_efuse(&speed);
> -	if (ret)
> -		return ret;
> +	speed = sun50i_cpufreq_get_efuse(match->data);
> +	if (speed < 0)
> +		return speed;
>  
>  	snprintf(name, MAX_NAME_LEN, "speed%d", speed);
>  
> @@ -163,8 +180,12 @@ static struct platform_driver sun50i_cpufreq_driver = {
>  	},
>  };
>  
> +static const struct sunxi_cpufreq_soc_data sun50i_h6_data = {
> +	.efuse_xlate = sun50i_h6_efuse_xlate,
> +};
> +
>  static const struct of_device_id sun50i_cpufreq_match_list[] = {
> -	{ .compatible = "allwinner,sun50i-h6" },
> +	{ .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data },
>  	{}
>  };
>  
> @@ -198,9 +219,8 @@ static int __init sun50i_cpufreq_init(void)
>  	if (unlikely(ret < 0))
>  		return ret;
>  
> -	sun50i_cpufreq_pdev =
> -		platform_device_register_simple("sun50i-cpufreq-nvmem",
> -						-1, NULL, 0);
> +	sun50i_cpufreq_pdev = platform_device_register_data(NULL,
> +		"sun50i-cpufreq-nvmem", -1, match, sizeof(*match));

The alignment here raises a checkpatch warning with --strict

Maxime

[-- Attachment #2: signature.asc --]
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Re: [PATCH v4 1/6] cpufreq: sun50i: add efuse_xlate to get efuse version.

[Maxime Ripard]

[-- Attachment #1.1: Type: text/plain, Size: 4872 bytes --]

Hi,

On Tue, Dec 08, 2020 at 03:19:28PM +0800, Shuosheng Huang wrote:
> It's better to use efuse_xlate to extract the differentiated part
> regarding different SoC.
> 
> Signed-off-by: Shuosheng Huang <huangshuosheng@allwinnertech.com>

Please wait a bit for reviews before sending a new version. You've sent
three versions in a day, and I haven't reviewed the first one.

Also, please put a changelog in the cover letter, we don't have any way
to tell what is the difference between v1, v2, v3 and v4.

> ---
>  drivers/cpufreq/sun50i-cpufreq-nvmem.c | 82 ++++++++++++++++----------
>  1 file changed, 51 insertions(+), 31 deletions(-)
> 
> diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> index 9907a165135b..3c0531938d1a 100644
> --- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> +++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> @@ -19,24 +19,51 @@
>  
>  #define MAX_NAME_LEN	7
>  
> -#define NVMEM_MASK	0x7
> -#define NVMEM_SHIFT	5
> +#define SUN50I_H6_NVMEM_MASK		0x7
> +#define SUN50I_H6_NVMEM_SHIFT		5
> +
> +struct sunxi_cpufreq_soc_data {
> +	int (*efuse_xlate)(struct nvmem_cell *speedbin_nvmem);
> +};
>  
>  static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev;
>  
> +static int sun50i_h6_efuse_xlate(struct nvmem_cell *speedbin_nvmem)
> +{
> +	size_t len;
> +	u32 *speedbin;
> +	u32 efuse_value;
> +
> +	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
> +	if (IS_ERR(speedbin))
> +		return PTR_ERR(speedbin);
> +
> +	efuse_value = (*(u32 *)speedbin >> SUN50I_H6_NVMEM_SHIFT) &
> +			  SUN50I_H6_NVMEM_MASK;
> +	kfree(speedbin);
> +	/*
> +	 * We treat unexpected efuse values as if the SoC was from
> +	 * the slowest bin. Expected efuse values are 1-3, slowest
> +	 * to fastest.
> +	 */
> +	if (efuse_value >= 1 && efuse_value <= 3)
> +		return efuse_value - 1;
> +	else
> +		return 0;
> +}
> +
>  /**
>   * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value
> - * @versions: Set to the value parsed from efuse
> + * @soc_data: pointer to sunxi_cpufreq_soc_data context
>   *
>   * Returns 0 if success.
>   */
> -static int sun50i_cpufreq_get_efuse(u32 *versions)
> +static int sun50i_cpufreq_get_efuse(const struct sunxi_cpufreq_soc_data *soc_data)
>  {
>  	struct nvmem_cell *speedbin_nvmem;
>  	struct device_node *np;
>  	struct device *cpu_dev;
> -	u32 *speedbin, efuse_value;
> -	size_t len;
> +	int versions;
>  	int ret;
>  
>  	cpu_dev = get_cpu_device(0);
> @@ -63,43 +90,33 @@ static int sun50i_cpufreq_get_efuse(u32 *versions)
>  		return PTR_ERR(speedbin_nvmem);
>  	}
>  
> -	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
> +	versions = soc_data->efuse_xlate(speedbin_nvmem);
>  	nvmem_cell_put(speedbin_nvmem);
> -	if (IS_ERR(speedbin))
> -		return PTR_ERR(speedbin);
> -
> -	efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK;
> -
> -	/*
> -	 * We treat unexpected efuse values as if the SoC was from
> -	 * the slowest bin. Expected efuse values are 1-3, slowest
> -	 * to fastest.
> -	 */
> -	if (efuse_value >= 1 && efuse_value <= 3)
> -		*versions = efuse_value - 1;
> -	else
> -		*versions = 0;
>  
> -	kfree(speedbin);
> -	return 0;
> +	return versions;
>  };
>  
>  static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
>  {
> +	const struct of_device_id *match;
>  	struct opp_table **opp_tables;
>  	char name[MAX_NAME_LEN];
>  	unsigned int cpu;
> -	u32 speed = 0;
> +	int speed = 0;
>  	int ret;
>  
> +	match = dev_get_platdata(&pdev->dev);
> +	if (!match)
> +		return -EINVAL;
> +
>  	opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables),
>  			     GFP_KERNEL);
>  	if (!opp_tables)
>  		return -ENOMEM;
>  
> -	ret = sun50i_cpufreq_get_efuse(&speed);
> -	if (ret)
> -		return ret;
> +	speed = sun50i_cpufreq_get_efuse(match->data);
> +	if (speed < 0)
> +		return speed;
>  
>  	snprintf(name, MAX_NAME_LEN, "speed%d", speed);
>  
> @@ -163,8 +180,12 @@ static struct platform_driver sun50i_cpufreq_driver = {
>  	},
>  };
>  
> +static const struct sunxi_cpufreq_soc_data sun50i_h6_data = {
> +	.efuse_xlate = sun50i_h6_efuse_xlate,
> +};
> +
>  static const struct of_device_id sun50i_cpufreq_match_list[] = {
> -	{ .compatible = "allwinner,sun50i-h6" },
> +	{ .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data },
>  	{}
>  };
>  
> @@ -198,9 +219,8 @@ static int __init sun50i_cpufreq_init(void)
>  	if (unlikely(ret < 0))
>  		return ret;
>  
> -	sun50i_cpufreq_pdev =
> -		platform_device_register_simple("sun50i-cpufreq-nvmem",
> -						-1, NULL, 0);
> +	sun50i_cpufreq_pdev = platform_device_register_data(NULL,
> +		"sun50i-cpufreq-nvmem", -1, match, sizeof(*match));

The alignment here raises a checkpatch warning with --strict

Maxime

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Re: [PATCH v4 1/6] cpufreq: sun50i: add efuse_xlate to get efuse version.

[Samuel Holland]

On 12/8/20 1:19 AM, Shuosheng Huang wrote:
> It's better to use efuse_xlate to extract the differentiated part
> regarding different SoC.
> 
> Signed-off-by: Shuosheng Huang <huangshuosheng@allwinnertech.com>
> ---
>  drivers/cpufreq/sun50i-cpufreq-nvmem.c | 82 ++++++++++++++++----------
>  1 file changed, 51 insertions(+), 31 deletions(-)
> 
> diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> index 9907a165135b..3c0531938d1a 100644
> --- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> +++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> @@ -19,24 +19,51 @@
>  
>  #define MAX_NAME_LEN	7
>  
> -#define NVMEM_MASK	0x7
> -#define NVMEM_SHIFT	5
> +#define SUN50I_H6_NVMEM_MASK		0x7
> +#define SUN50I_H6_NVMEM_SHIFT		5
> +
> +struct sunxi_cpufreq_soc_data {
> +	int (*efuse_xlate)(struct nvmem_cell *speedbin_nvmem);
> +};
>  
>  static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev;
>  
> +static int sun50i_h6_efuse_xlate(struct nvmem_cell *speedbin_nvmem)
> +{
> +	size_t len;
> +	u32 *speedbin;
> +	u32 efuse_value;
> +
> +	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
> +	if (IS_ERR(speedbin))
> +		return PTR_ERR(speedbin);
> +
> +	efuse_value = (*(u32 *)speedbin >> SUN50I_H6_NVMEM_SHIFT) &
> +			  SUN50I_H6_NVMEM_MASK;

This does not need a cast. speedbin is already a pointer to u32.

With the cast removed:

Reviewed-by: Samuel Holland <samuel@sholland.org>
Tested-by: Samuel Holland <samuel@sholland.org> # H6

> +	kfree(speedbin);
> +	/*
> +	 * We treat unexpected efuse values as if the SoC was from
> +	 * the slowest bin. Expected efuse values are 1-3, slowest
> +	 * to fastest.
> +	 */
> +	if (efuse_value >= 1 && efuse_value <= 3)
> +		return efuse_value - 1;
> +	else
> +		return 0;
> +}
> +
>  /**
>   * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value
> - * @versions: Set to the value parsed from efuse
> + * @soc_data: pointer to sunxi_cpufreq_soc_data context
>   *
>   * Returns 0 if success.
>   */
> -static int sun50i_cpufreq_get_efuse(u32 *versions)
> +static int sun50i_cpufreq_get_efuse(const struct sunxi_cpufreq_soc_data *soc_data)
>  {
>  	struct nvmem_cell *speedbin_nvmem;
>  	struct device_node *np;
>  	struct device *cpu_dev;
> -	u32 *speedbin, efuse_value;
> -	size_t len;
> +	int versions;
>  	int ret;
>  
>  	cpu_dev = get_cpu_device(0);
> @@ -63,43 +90,33 @@ static int sun50i_cpufreq_get_efuse(u32 *versions)
>  		return PTR_ERR(speedbin_nvmem);
>  	}
>  
> -	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
> +	versions = soc_data->efuse_xlate(speedbin_nvmem);
>  	nvmem_cell_put(speedbin_nvmem);
> -	if (IS_ERR(speedbin))
> -		return PTR_ERR(speedbin);
> -
> -	efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK;
> -
> -	/*
> -	 * We treat unexpected efuse values as if the SoC was from
> -	 * the slowest bin. Expected efuse values are 1-3, slowest
> -	 * to fastest.
> -	 */
> -	if (efuse_value >= 1 && efuse_value <= 3)
> -		*versions = efuse_value - 1;
> -	else
> -		*versions = 0;
>  
> -	kfree(speedbin);
> -	return 0;
> +	return versions;
>  };
>  
>  static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
>  {
> +	const struct of_device_id *match;
>  	struct opp_table **opp_tables;
>  	char name[MAX_NAME_LEN];
>  	unsigned int cpu;
> -	u32 speed = 0;
> +	int speed = 0;
>  	int ret;
>  
> +	match = dev_get_platdata(&pdev->dev);
> +	if (!match)
> +		return -EINVAL;
> +
>  	opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables),
>  			     GFP_KERNEL);
>  	if (!opp_tables)
>  		return -ENOMEM;
>  
> -	ret = sun50i_cpufreq_get_efuse(&speed);
> -	if (ret)
> -		return ret;
> +	speed = sun50i_cpufreq_get_efuse(match->data);
> +	if (speed < 0)
> +		return speed;
>  
>  	snprintf(name, MAX_NAME_LEN, "speed%d", speed);
>  
> @@ -163,8 +180,12 @@ static struct platform_driver sun50i_cpufreq_driver = {
>  	},
>  };
>  
> +static const struct sunxi_cpufreq_soc_data sun50i_h6_data = {
> +	.efuse_xlate = sun50i_h6_efuse_xlate,
> +};
> +
>  static const struct of_device_id sun50i_cpufreq_match_list[] = {
> -	{ .compatible = "allwinner,sun50i-h6" },
> +	{ .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data },
>  	{}
>  };
>  
> @@ -198,9 +219,8 @@ static int __init sun50i_cpufreq_init(void)
>  	if (unlikely(ret < 0))
>  		return ret;
>  
> -	sun50i_cpufreq_pdev =
> -		platform_device_register_simple("sun50i-cpufreq-nvmem",
> -						-1, NULL, 0);
> +	sun50i_cpufreq_pdev = platform_device_register_data(NULL,
> +		"sun50i-cpufreq-nvmem", -1, match, sizeof(*match));
>  	ret = PTR_ERR_OR_ZERO(sun50i_cpufreq_pdev);
>  	if (ret == 0)
>  		return 0;
> 

Re: [PATCH v4 1/6] cpufreq: sun50i: add efuse_xlate to get efuse version.

[Samuel Holland]

On 12/8/20 1:19 AM, Shuosheng Huang wrote:
> It's better to use efuse_xlate to extract the differentiated part
> regarding different SoC.
> 
> Signed-off-by: Shuosheng Huang <huangshuosheng@allwinnertech.com>
> ---
>  drivers/cpufreq/sun50i-cpufreq-nvmem.c | 82 ++++++++++++++++----------
>  1 file changed, 51 insertions(+), 31 deletions(-)
> 
> diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> index 9907a165135b..3c0531938d1a 100644
> --- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> +++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
> @@ -19,24 +19,51 @@
>  
>  #define MAX_NAME_LEN	7
>  
> -#define NVMEM_MASK	0x7
> -#define NVMEM_SHIFT	5
> +#define SUN50I_H6_NVMEM_MASK		0x7
> +#define SUN50I_H6_NVMEM_SHIFT		5
> +
> +struct sunxi_cpufreq_soc_data {
> +	int (*efuse_xlate)(struct nvmem_cell *speedbin_nvmem);
> +};
>  
>  static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev;
>  
> +static int sun50i_h6_efuse_xlate(struct nvmem_cell *speedbin_nvmem)
> +{
> +	size_t len;
> +	u32 *speedbin;
> +	u32 efuse_value;
> +
> +	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
> +	if (IS_ERR(speedbin))
> +		return PTR_ERR(speedbin);
> +
> +	efuse_value = (*(u32 *)speedbin >> SUN50I_H6_NVMEM_SHIFT) &
> +			  SUN50I_H6_NVMEM_MASK;

This does not need a cast. speedbin is already a pointer to u32.

With the cast removed:

Reviewed-by: Samuel Holland <samuel@sholland.org>
Tested-by: Samuel Holland <samuel@sholland.org> # H6

> +	kfree(speedbin);
> +	/*
> +	 * We treat unexpected efuse values as if the SoC was from
> +	 * the slowest bin. Expected efuse values are 1-3, slowest
> +	 * to fastest.
> +	 */
> +	if (efuse_value >= 1 && efuse_value <= 3)
> +		return efuse_value - 1;
> +	else
> +		return 0;
> +}
> +
>  /**
>   * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value
> - * @versions: Set to the value parsed from efuse
> + * @soc_data: pointer to sunxi_cpufreq_soc_data context
>   *
>   * Returns 0 if success.
>   */
> -static int sun50i_cpufreq_get_efuse(u32 *versions)
> +static int sun50i_cpufreq_get_efuse(const struct sunxi_cpufreq_soc_data *soc_data)
>  {
>  	struct nvmem_cell *speedbin_nvmem;
>  	struct device_node *np;
>  	struct device *cpu_dev;
> -	u32 *speedbin, efuse_value;
> -	size_t len;
> +	int versions;
>  	int ret;
>  
>  	cpu_dev = get_cpu_device(0);
> @@ -63,43 +90,33 @@ static int sun50i_cpufreq_get_efuse(u32 *versions)
>  		return PTR_ERR(speedbin_nvmem);
>  	}
>  
> -	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
> +	versions = soc_data->efuse_xlate(speedbin_nvmem);
>  	nvmem_cell_put(speedbin_nvmem);
> -	if (IS_ERR(speedbin))
> -		return PTR_ERR(speedbin);
> -
> -	efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK;
> -
> -	/*
> -	 * We treat unexpected efuse values as if the SoC was from
> -	 * the slowest bin. Expected efuse values are 1-3, slowest
> -	 * to fastest.
> -	 */
> -	if (efuse_value >= 1 && efuse_value <= 3)
> -		*versions = efuse_value - 1;
> -	else
> -		*versions = 0;
>  
> -	kfree(speedbin);
> -	return 0;
> +	return versions;
>  };
>  
>  static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
>  {
> +	const struct of_device_id *match;
>  	struct opp_table **opp_tables;
>  	char name[MAX_NAME_LEN];
>  	unsigned int cpu;
> -	u32 speed = 0;
> +	int speed = 0;
>  	int ret;
>  
> +	match = dev_get_platdata(&pdev->dev);
> +	if (!match)
> +		return -EINVAL;
> +
>  	opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables),
>  			     GFP_KERNEL);
>  	if (!opp_tables)
>  		return -ENOMEM;
>  
> -	ret = sun50i_cpufreq_get_efuse(&speed);
> -	if (ret)
> -		return ret;
> +	speed = sun50i_cpufreq_get_efuse(match->data);
> +	if (speed < 0)
> +		return speed;
>  
>  	snprintf(name, MAX_NAME_LEN, "speed%d", speed);
>  
> @@ -163,8 +180,12 @@ static struct platform_driver sun50i_cpufreq_driver = {
>  	},
>  };
>  
> +static const struct sunxi_cpufreq_soc_data sun50i_h6_data = {
> +	.efuse_xlate = sun50i_h6_efuse_xlate,
> +};
> +
>  static const struct of_device_id sun50i_cpufreq_match_list[] = {
> -	{ .compatible = "allwinner,sun50i-h6" },
> +	{ .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data },
>  	{}
>  };
>  
> @@ -198,9 +219,8 @@ static int __init sun50i_cpufreq_init(void)
>  	if (unlikely(ret < 0))
>  		return ret;
>  
> -	sun50i_cpufreq_pdev =
> -		platform_device_register_simple("sun50i-cpufreq-nvmem",
> -						-1, NULL, 0);
> +	sun50i_cpufreq_pdev = platform_device_register_data(NULL,
> +		"sun50i-cpufreq-nvmem", -1, match, sizeof(*match));
>  	ret = PTR_ERR_OR_ZERO(sun50i_cpufreq_pdev);
>  	if (ret == 0)
>  		return 0;
> 


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