linux-kernel - RE: [PATCH v6 2/3] eeprom: at24: add support to fetch eeprom device property "size"

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Date:   Wed, 20 Sep 2017 03:52:35 +0000
From:   "Mani, Rajmohan" <rajmohan.mani@...el.com>
To:     "Mohandass, Divagar" <divagar.mohandass@...el.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "wsa@...-dreams.de" <wsa@...-dreams.de>,
        "sakari.ailus@....fi" <sakari.ailus@....fi>
CC:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tfiga@...omium.org" <tfiga@...omium.org>
Subject: RE: [PATCH v6 2/3] eeprom: at24: add support to fetch eeprom device
 property "size"

Adding Tomasz...

> -----Original Message-----
> From: Mohandass, Divagar
> Sent: Monday, September 04, 2017 3:29 AM
> To: robh+dt@...nel.org; mark.rutland@....com; wsa@...-dreams.de;
> sakari.ailus@....fi
> Cc: devicetree@...r.kernel.org; linux-i2c@...r.kernel.org; linux-
> kernel@...r.kernel.org; Mani, Rajmohan <rajmohan.mani@...el.com>;
> Mohandass, Divagar <divagar.mohandass@...el.com>
> Subject: [PATCH v6 2/3] eeprom: at24: add support to fetch eeprom device
> property "size"
> 
> Obtain the size of the EEPROM chip from DT if the "size" property is specified
> for the device.
> 
> Signed-off-by: Divagar Mohandass <divagar.mohandass@...el.com>
> ---
>  drivers/misc/eeprom/at24.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index
> 764ff5df..2199c42 100644
> --- a/drivers/misc/eeprom/at24.c
> +++ b/drivers/misc/eeprom/at24.c
> @@ -570,6 +570,10 @@ static void at24_get_pdata(struct device *dev, struct
> at24_platform_data *chip)
>  	if (device_property_present(dev, "read-only"))
>  		chip->flags |= AT24_FLAG_READONLY;
> 
> +	err = device_property_read_u32(dev, "size", &val);
> +	if (!err)
> +		chip->byte_len = val;
> +
>  	err = device_property_read_u32(dev, "pagesize", &val);
>  	if (!err) {
>  		chip->page_size = val;
> --
> 1.9.1