[PATCH] nvmem: qcom-spmi-sdam: Set size in struct nvmem_config

[PATCH] nvmem: qcom-spmi-sdam: Set size in struct nvmem_config

[Luca Weiss]

Let the nvmem core know what size the SDAM is, most notably this fixes
the size of /sys/bus/nvmem/devices/spmi_sdam*/nvmem being '0' and makes
user space work with that file.

  ~ # hexdump -C -s 64 /sys/bus/nvmem/devices/spmi_sdam2/nvmem
  00000040  02 01 00 00 04 00 00 00  00 00 00 00 00 00 00 00  |................|
  00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
  *
  00000080

Fixes: 40ce9798794f ("nvmem: add QTI SDAM driver")
Cc: stable@vger.kernel.org
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
Related, it would be nice to set sdam->sdam_config.type to an
appropriate value, the ones currently upstream are:

  enum nvmem_type {
      NVMEM_TYPE_UNKNOWN = 0,
      NVMEM_TYPE_EEPROM,
      NVMEM_TYPE_OTP,
      NVMEM_TYPE_BATTERY_BACKED,
      NVMEM_TYPE_FRAM,
  };

I don't know what would fit for SDAM and I couldn't find any info on
createpoint either, not even what the abbreviation SDAM stands for.
---
 drivers/nvmem/qcom-spmi-sdam.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvmem/qcom-spmi-sdam.c b/drivers/nvmem/qcom-spmi-sdam.c
index 9aa8f42faa4c93532cf8c70ea992a4fbb005d006..4f1cca6eab71e1efc5328448f69f863e6db57c5a 100644
--- a/drivers/nvmem/qcom-spmi-sdam.c
+++ b/drivers/nvmem/qcom-spmi-sdam.c
@@ -144,6 +144,7 @@ static int sdam_probe(struct platform_device *pdev)
 	sdam->sdam_config.owner = THIS_MODULE;
 	sdam->sdam_config.add_legacy_fixed_of_cells = true;
 	sdam->sdam_config.stride = 1;
+	sdam->sdam_config.size = sdam->size;
 	sdam->sdam_config.word_size = 1;
 	sdam->sdam_config.reg_read = sdam_read;
 	sdam->sdam_config.reg_write = sdam_write;

---
base-commit: 8155b4ef3466f0e289e8fcc9e6e62f3f4dceeac2
change-id: 20241220-sdam-size-da6adec6fbaa

Best regards,
-- 
Luca Weiss <luca.weiss@fairphone.com>

Re: [PATCH] nvmem: qcom-spmi-sdam: Set size in struct nvmem_config

[Vladimir Zapolskiy]

On 12/20/24 14:22, Luca Weiss wrote:
> Let the nvmem core know what size the SDAM is, most notably this fixes
> the size of /sys/bus/nvmem/devices/spmi_sdam*/nvmem being '0' and makes
> user space work with that file.
> 
>    ~ # hexdump -C -s 64 /sys/bus/nvmem/devices/spmi_sdam2/nvmem
>    00000040  02 01 00 00 04 00 00 00  00 00 00 00 00 00 00 00  |................|
>    00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
>    *
>    00000080
> 
> Fixes: 40ce9798794f ("nvmem: add QTI SDAM driver")
> Cc: stable@vger.kernel.org
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>

Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>

> ---
> Related, it would be nice to set sdam->sdam_config.type to an
> appropriate value, the ones currently upstream are:
> 
>    enum nvmem_type {
>        NVMEM_TYPE_UNKNOWN = 0,
>        NVMEM_TYPE_EEPROM,
>        NVMEM_TYPE_OTP,
>        NVMEM_TYPE_BATTERY_BACKED,
>        NVMEM_TYPE_FRAM,
>    };
> 
> I don't know what would fit for SDAM and I couldn't find any info on
> createpoint either, not even what the abbreviation SDAM stands for.
> ---
>   drivers/nvmem/qcom-spmi-sdam.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/nvmem/qcom-spmi-sdam.c b/drivers/nvmem/qcom-spmi-sdam.c
> index 9aa8f42faa4c93532cf8c70ea992a4fbb005d006..4f1cca6eab71e1efc5328448f69f863e6db57c5a 100644
> --- a/drivers/nvmem/qcom-spmi-sdam.c
> +++ b/drivers/nvmem/qcom-spmi-sdam.c
> @@ -144,6 +144,7 @@ static int sdam_probe(struct platform_device *pdev)
>   	sdam->sdam_config.owner = THIS_MODULE;
>   	sdam->sdam_config.add_legacy_fixed_of_cells = true;
>   	sdam->sdam_config.stride = 1;
> +	sdam->sdam_config.size = sdam->size;
>   	sdam->sdam_config.word_size = 1;
>   	sdam->sdam_config.reg_read = sdam_read;
>   	sdam->sdam_config.reg_write = sdam_write;
> 

--
Best wishes,
Vladimir

Re: [PATCH] nvmem: qcom-spmi-sdam: Set size in struct nvmem_config

[Srinivas Kandagatla]

On Fri, 20 Dec 2024 13:22:07 +0100, Luca Weiss wrote:
> Let the nvmem core know what size the SDAM is, most notably this fixes
> the size of /sys/bus/nvmem/devices/spmi_sdam*/nvmem being '0' and makes
> user space work with that file.
> 
>   ~ # hexdump -C -s 64 /sys/bus/nvmem/devices/spmi_sdam2/nvmem
>   00000040  02 01 00 00 04 00 00 00  00 00 00 00 00 00 00 00  |................|
>   00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
>   *
>   00000080
> 
> [...]

Applied, thanks!

[1/1] nvmem: qcom-spmi-sdam: Set size in struct nvmem_config
      commit: ad71aaa9083a7ca8be9105d30a3eeaf4937234f8

Best regards,
-- 
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>