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| author |   Alan Chiang <alanx.chiang@intel.com> | 2018-07-25 11:20:22 +0800 |
|---|---|---|
| committer |   Bartosz Golaszewski <brgl@bgdev.pl> | 2018-07-25 09:17:57 +0200 |
| commit | a2b3bf4846e5eed62ea6abb096af2c950961033c (patch) | |
| tree | bd9b73b3736c24323b317ea107dc2a8d4ff4af9d /drivers/misc | |
| parent | dt-bindings: at24: Add address-width property (diff) | |
| download | linux-dev-a2b3bf4846e5eed62ea6abb096af2c950961033c.tar.xz linux-dev-a2b3bf4846e5eed62ea6abb096af2c950961033c.zip | |
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: Alan Chiang <alanx.chiang@intel.com>
Signed-off-by: Andy Yeh <andy.yeh@intel.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/eeprom/at24.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index f5cc517d1131..7e50e1d6f58c 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -478,6 +478,23 @@ static void at24_properties_to_pdata(struct device *dev, if (device_property_present(dev, "no-read-rollover")) 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); if (!err) chip->byte_len = val; |