linux-kernel - Re: [PATCH v4 02/18] Documentation: nvmem: document lookup entries

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Message-ID: <d5c1a83c-7c63-32ab-1d41-8e9bf4cdd6b7@linaro.org>
Date:   Mon, 16 Jul 2018 13:18:59 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>, Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Grygorii Strashko <grygorii.strashko@...com>,
        "David S . Miller" <davem@...emloft.net>,
        Lukas Wunner <lukas@...ner.de>, Rob Herring <robh@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>,
        David Lechner <david@...hnology.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Lunn <andrew@...n.ch>, Jonathan Corbet <corbet@....net>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, netdev@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH v4 02/18] Documentation: nvmem: document lookup entries



On 29/06/18 10:40, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> Describe the usage of nvmem cell lookup tables.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>

Acked-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>

> ---
>   Documentation/nvmem/nvmem.txt | 28 ++++++++++++++++++++++++++++
>   1 file changed, 28 insertions(+)
> 
> diff --git a/Documentation/nvmem/nvmem.txt b/Documentation/nvmem/nvmem.txt
> index 8d8d8f58f96f..9d5e3ca2b4f3 100644
> --- a/Documentation/nvmem/nvmem.txt
> +++ b/Documentation/nvmem/nvmem.txt
> @@ -58,6 +58,34 @@ static int qfprom_probe(struct platform_device *pdev)
>   It is mandatory that the NVMEM provider has a regmap associated with its
>   struct device. Failure to do would return error code from nvmem_register().
>   
> +Additionally it is possible to create nvmem cell lookup entries and register
> +them with the nvmem framework from machine code as shown in the example below:
> +
> +static struct nvmem_cell_lookup foobar_lookup = {
> +	.info = {
> +		.name = "mac-address",
> +		.offset = 0xd000,
> +		.bytes = ERH_ALEN,
> +	},
> +	.nvmem_name = "foobar",
> +};
> +
> +static void foobar_register(void)
> +{
> +	...
> +	nvmem_add_lookup_table(&foobar_lookup, 1);
> +	...
> +}
> +
> +A lookup entry table can be later removed if needed:
> +
> +static void foobar_fini(void)
> +{
> +	...
> +	nvmem_del_lookup_table(&foobar_lookup, 1);
> +	...
> +}
> +
>   NVMEM Consumers
>   +++++++++++++++
>   
>