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[PATCH v5 4/6] soc: qcom: Add LLCC support for multi channel DDR

Komal Bajaj posted 6 patches 2 years, 1 month ago
There is a newer version of this series
[PATCH v5 4/6] soc: qcom: Add LLCC support for multi channel DDR
Posted by Komal Bajaj 2 years, 1 month ago 
Add LLCC support for multi channel DDR configuration
based on a feature register.

Signed-off-by: Komal Bajaj <quic_kbajaj@quicinc.com>
---
 drivers/soc/qcom/llcc-qcom.c | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
index 321f8d2079f7..1d2b08dfecea 100644
--- a/drivers/soc/qcom/llcc-qcom.c
+++ b/drivers/soc/qcom/llcc-qcom.c
@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
+#include <linux/nvmem-consumer.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/regmap.h>
@@ -997,6 +998,19 @@ static int qcom_llcc_cfg_program(struct platform_device *pdev,
 	return ret;
 }
 
+static int qcom_llcc_get_cfg_index(struct platform_device *pdev, u8 *cfg_index)
+{
+	int ret;
+
+	ret = nvmem_cell_read_u8(&pdev->dev, "multi-chan-ddr", cfg_index);
+	if (ret == -ENOENT || ret == -EOPNOTSUPP) {
+		*cfg_index = 0;
+		return 0;
+	}
+
+	return ret;
+}
+
 static int qcom_llcc_remove(struct platform_device *pdev)
 {
 	/* Set the global pointer to a error code to avoid referencing it */
@@ -1033,6 +1047,7 @@ static int qcom_llcc_probe(struct platform_device *pdev)
 	const struct qcom_llcc_config *cfg;
 	const struct llcc_slice_config *llcc_cfg;
 	u32 sz;
+	u8 cfg_index;
 	u32 version;
 	struct regmap *regmap;
 
@@ -1050,7 +1065,16 @@ static int qcom_llcc_probe(struct platform_device *pdev)
 	}
 
 	cfgs = of_device_get_match_data(&pdev->dev);
-	cfg = &cfgs->llcc_config[0];
+	ret = qcom_llcc_get_cfg_index(pdev, &cfg_index);
+	 if (ret)
+		goto err;
+
+	if (cfg_index >= cfgs->num_cfgs) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	cfg = &cfgs->llcc_config[cfg_index];
 
 	ret = regmap_read(regmap, cfg->reg_offset[LLCC_COMMON_STATUS0], &num_banks);
 	if (ret)
-- 
2.40.1
Re: [PATCH v5 4/6] soc: qcom: Add LLCC support for multi channel DDR
Posted by Mukesh Ojha 2 years, 1 month ago 

On 7/24/2023 2:11 PM, Komal Bajaj wrote:
> Add LLCC support for multi channel DDR configuration
> based on a feature register.
> 
> Signed-off-by: Komal Bajaj <quic_kbajaj@quicinc.com>
> ---
>   drivers/soc/qcom/llcc-qcom.c | 26 +++++++++++++++++++++++++-
>   1 file changed, 25 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
> index 321f8d2079f7..1d2b08dfecea 100644
> --- a/drivers/soc/qcom/llcc-qcom.c
> +++ b/drivers/soc/qcom/llcc-qcom.c
> @@ -12,6 +12,7 @@
>   #include <linux/kernel.h>
>   #include <linux/module.h>
>   #include <linux/mutex.h>
> +#include <linux/nvmem-consumer.h>
>   #include <linux/of.h>
>   #include <linux/of_device.h>
>   #include <linux/regmap.h>
> @@ -997,6 +998,19 @@ static int qcom_llcc_cfg_program(struct platform_device *pdev,
>   	return ret;
>   }
>   
> +static int qcom_llcc_get_cfg_index(struct platform_device *pdev, u8 *cfg_index)
> +{
> +	int ret;
> +
> +	ret = nvmem_cell_read_u8(&pdev->dev, "multi-chan-ddr", cfg_index);
> +	if (ret == -ENOENT || ret == -EOPNOTSUPP) {
> +		*cfg_index = 0;
> +		return 0;
> +	}
> +
> +	return ret;
> +}
> +
>   static int qcom_llcc_remove(struct platform_device *pdev)
>   {
>   	/* Set the global pointer to a error code to avoid referencing it */
> @@ -1033,6 +1047,7 @@ static int qcom_llcc_probe(struct platform_device *pdev)
>   	const struct qcom_llcc_config *cfg;
>   	const struct llcc_slice_config *llcc_cfg;
>   	u32 sz;
> +	u8 cfg_index;
>   	u32 version;
>   	struct regmap *regmap;
>   
> @@ -1050,7 +1065,16 @@ static int qcom_llcc_probe(struct platform_device *pdev)
>   	}
>   
>   	cfgs = of_device_get_match_data(&pdev->dev);
> -	cfg = &cfgs->llcc_config[0];
> +	ret = qcom_llcc_get_cfg_index(pdev, &cfg_index);
> +	 if (ret)

alignment.. ?

-Mukesh

> +		goto err;
> +
> +	if (cfg_index >= cfgs->num_cfgs) {
> +		ret = -EINVAL;
> +		goto err;
> +	}
> +
> +	cfg = &cfgs->llcc_config[cfg_index];
>   
>   	ret = regmap_read(regmap, cfg->reg_offset[LLCC_COMMON_STATUS0], &num_banks);
>   	if (ret)
Re: [PATCH v5 4/6] soc: qcom: Add LLCC support for multi channel DDR
Posted by Komal Bajaj 2 years, 1 month ago 

On 7/24/2023 6:10 PM, Mukesh Ojha wrote:
>
>
> On 7/24/2023 2:11 PM, Komal Bajaj wrote:
>> Add LLCC support for multi channel DDR configuration
>> based on a feature register.
>>
>> Signed-off-by: Komal Bajaj <quic_kbajaj@quicinc.com>
>> ---
>>   drivers/soc/qcom/llcc-qcom.c | 26 +++++++++++++++++++++++++-
>>   1 file changed, 25 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
>> index 321f8d2079f7..1d2b08dfecea 100644
>> --- a/drivers/soc/qcom/llcc-qcom.c
>> +++ b/drivers/soc/qcom/llcc-qcom.c
>> @@ -12,6 +12,7 @@
>>   #include <linux/kernel.h>
>>   #include <linux/module.h>
>>   #include <linux/mutex.h>
>> +#include <linux/nvmem-consumer.h>
>>   #include <linux/of.h>
>>   #include <linux/of_device.h>
>>   #include <linux/regmap.h>
>> @@ -997,6 +998,19 @@ static int qcom_llcc_cfg_program(struct 
>> platform_device *pdev,
>>       return ret;
>>   }
>>   +static int qcom_llcc_get_cfg_index(struct platform_device *pdev, 
>> u8 *cfg_index)
>> +{
>> +    int ret;
>> +
>> +    ret = nvmem_cell_read_u8(&pdev->dev, "multi-chan-ddr", cfg_index);
>> +    if (ret == -ENOENT || ret == -EOPNOTSUPP) {
>> +        *cfg_index = 0;
>> +        return 0;
>> +    }
>> +
>> +    return ret;
>> +}
>> +
>>   static int qcom_llcc_remove(struct platform_device *pdev)
>>   {
>>       /* Set the global pointer to a error code to avoid referencing 
>> it */
>> @@ -1033,6 +1047,7 @@ static int qcom_llcc_probe(struct 
>> platform_device *pdev)
>>       const struct qcom_llcc_config *cfg;
>>       const struct llcc_slice_config *llcc_cfg;
>>       u32 sz;
>> +    u8 cfg_index;
>>       u32 version;
>>       struct regmap *regmap;
>>   @@ -1050,7 +1065,16 @@ static int qcom_llcc_probe(struct 
>> platform_device *pdev)
>>       }
>>         cfgs = of_device_get_match_data(&pdev->dev);
>> -    cfg = &cfgs->llcc_config[0];
>> +    ret = qcom_llcc_get_cfg_index(pdev, &cfg_index);
>> +     if (ret)
>
> alignment.. ?

Thanks for pointing it out. Will fix it in the next series.

Thanks
Komal

>
> -Mukesh
>
>> +        goto err;
>> +
>> +    if (cfg_index >= cfgs->num_cfgs) {
>> +        ret = -EINVAL;
>> +        goto err;
>> +    }
>> +
>> +    cfg = &cfgs->llcc_config[cfg_index];
>>         ret = regmap_read(regmap, 
>> cfg->reg_offset[LLCC_COMMON_STATUS0], &num_banks);
>>       if (ret)

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