linux-kernel - [PATCH v7 2/3] eeprom: at24: add support to fetch eeprom device property "size"

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Date:   Tue, 10 Oct 2017 11:30:36 +0530
From:   Divagar Mohandass <divagar.mohandass@...el.com>
To:     robh+dt@...nel.org, mark.rutland@....com, wsa@...-dreams.de,
        sakari.ailus@....fi, tfiga@...omium.org
Cc:     devicetree@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org, rajmohan.mani@...el.com,
        mika.westerberg@...ux.intel.com, linux-pm@...r.kernel.org,
        Divagar Mohandass <divagar.mohandass@...el.com>
Subject: [PATCH v7 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.

Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
Reviewed-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
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