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.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Divagar Mohandass <divagar.mohandass@intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 764ff5d..2199c42 100644 (file)
--- 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;