Commit a2b3bf48 authored by Alan Chiang's avatar Alan Chiang Committed by Bartosz Golaszewski

eeprom: at24: Add support for address-width property

Provide a flexible way to determine the addressing bits of eeprom.
Pass the addressing bits to driver through address-width property.
Signed-off-by: default avatarAlan Chiang <alanx.chiang@intel.com>
Signed-off-by: default avatarAndy Yeh <andy.yeh@intel.com>
Signed-off-by: default avatarBartosz Golaszewski <brgl@bgdev.pl>
parent 21d04054
...@@ -478,6 +478,23 @@ static void at24_properties_to_pdata(struct device *dev, ...@@ -478,6 +478,23 @@ static void at24_properties_to_pdata(struct device *dev,
if (device_property_present(dev, "no-read-rollover")) if (device_property_present(dev, "no-read-rollover"))
chip->flags |= AT24_FLAG_NO_RDROL; chip->flags |= AT24_FLAG_NO_RDROL;
err = device_property_read_u32(dev, "address-width", &val);
if (!err) {
switch (val) {
case 8:
if (chip->flags & AT24_FLAG_ADDR16)
dev_warn(dev, "Override address width to be 8, while default is 16\n");
chip->flags &= ~AT24_FLAG_ADDR16;
break;
case 16:
chip->flags |= AT24_FLAG_ADDR16;
break;
default:
dev_warn(dev, "Bad \"address-width\" property: %u\n",
val);
}
}
err = device_property_read_u32(dev, "size", &val); err = device_property_read_u32(dev, "size", &val);
if (!err) if (!err)
chip->byte_len = val; chip->byte_len = val;
......
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