linux-kernel - Re: [PATCH v5 05/11] nvmem: Add nvmem

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Date:	Tue, 16 Jun 2015 15:49:14 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	linux-arm-kernel@...ts.infradead.org
CC:	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Rob Herring <robh+dt@...nel.org>,
	Kumar Gala <galak@...eaurora.org>,
	Mark Brown <broonie@...nel.org>, s.hauer@...gutronix.de,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	arnd@...db.de, pantelis.antoniou@...sulko.com, mporter@...sulko.com
Subject: Re: [PATCH v5 05/11] nvmem: Add nvmem_device based consumer apis.

On 05/21/2015 09:43 AM, Srinivas Kandagatla wrote:
> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
> index 8a4b358..68ee8d1 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -436,6 +436,51 @@ static int __nvmem_device_put(struct nvmem_device *nvmem)
>  	return 0;
>  }
>  
> +static int nvmem_match(struct device *dev, const void *data)
> +{
> +	return !strcmp(dev_name(dev), (const char *)data);

Unnecessary cast.

> +}
> +
> +static struct nvmem_device *nvmem_find(const char *name)
> +{
> +	struct device *d;
> +
> +	d = class_find_device(&nvmem_class, NULL, (void *)name, nvmem_match);

Unnecessary cast

> +
> +	return d ? to_nvmem_device(d) : NULL;
> +}

[...]
> +
> +void nvmem_device_put(struct nvmem_device *nvmem)
> +{
> +	__nvmem_device_put(nvmem);
> +}
> +EXPORT_SYMBOL_GPL(nvmem_device_put);
>
> +int nvmem_device_cell_read(struct nvmem_device *nvmem,
> +			   struct nvmem_cell_info *info, void *buf)
> +{
> +}
> +EXPORT_SYMBOL_GPL(nvmem_device_cell_read);
> +
> +int nvmem_device_cell_write(struct nvmem_device *nvmem,
> +			    struct nvmem_cell_info *info, void *buf)
> +{
> +}
> +EXPORT_SYMBOL_GPL(nvmem_device_cell_write);
> +
> +int nvmem_device_read(struct nvmem_device *nvmem,
> +		      unsigned int offset,
> +		      size_t bytes, void *buf)
> +{
> +}
> +EXPORT_SYMBOL_GPL(nvmem_device_read);
> +
> +int nvmem_device_write(struct nvmem_device *nvmem,
> +		       unsigned int offset,
> +		       size_t bytes, void *buf)
> +{
> +}
> +EXPORT_SYMBOL_GPL(nvmem_device_write);

Can you please add kernel-doc on these exported APIs?

> +
>  static int nvmem_init(void)
>  {
>  	return class_register(&nvmem_class);
> diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
> index c3fa8c7..66c67ba 100644
> --- a/include/linux/nvmem-consumer.h
> +++ b/include/linux/nvmem-consumer.h
> @@ -23,6 +32,18 @@ void nvmem_cell_put(struct nvmem_cell *cell);
>  void *nvmem_cell_read(struct nvmem_cell *cell, ssize_t *len);
>  int nvmem_cell_write(struct nvmem_cell *cell, void *buf, ssize_t len);
>  
> +/* direct nvmem device read/write interface */
> +struct nvmem_device *nvmem_device_get(struct device *dev, const char *name);
> +void nvmem_device_put(struct nvmem_device *nvmem);
> +int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset,
> +		      size_t bytes, void *buf);
> +int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset,
> +		       size_t bytes, void *buf);
> +int nvmem_device_cell_read(struct nvmem_device *nvmem,
> +			   struct nvmem_cell_info *info, void *buf);
> +int nvmem_device_cell_write(struct nvmem_device *nvmem,
> +			    struct nvmem_cell_info *info, void *buf);
> +

Can we also have devm_nvmem_*_get() APIs please?

> diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
> index 4908b37..7a982cd 100644
> --- a/include/linux/nvmem-provider.h
> +++ b/include/linux/nvmem-provider.h
> @@ -12,15 +12,9 @@
>  #ifndef _LINUX_NVMEM_PROVIDER_H
>  #define _LINUX_NVMEM_PROVIDER_H
>  
> -struct nvmem_device;
> +#include <linux/nvmem-consumer.h>
>  
> -struct nvmem_cell_info {
> -	const char		*name;
> -	int			offset;
> -	int			bytes;
> -	int			bit_offset;
> -	int			nbits;
> -};
> +struct nvmem_device;

Should this diff be part of an earlier patch?

-- 
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