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eeprom: at24: implement support for 'num-addresses' property 

If the device node defines 'num-addresses', let it override the default
behavior.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
This commit is contained in:
Bartosz Golaszewski 2019-02-05 14:18:25 +01:00
parent e7224a116f
commit 950bcbbe31
1 changed files with 8 additions and 5 deletions
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13
drivers/misc/eeprom/at24.c
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@ -641,11 +641,14 @@ static int at24_probe(struct i2c_client *client)
if (!is_power_of_2(page_size))
dev_warn(dev, "page_size looks suspicious (no power of 2)!\n");
if (flags & AT24_FLAG_TAKE8ADDR)
num_addresses = 8;
else
num_addresses = DIV_ROUND_UP(byte_len,
(flags & AT24_FLAG_ADDR16) ? 65536 : 256);
err = device_property_read_u32(dev, "num-addresses", &num_addresses);
if (err) {
if (flags & AT24_FLAG_TAKE8ADDR)
num_addresses = 8;
else
num_addresses = DIV_ROUND_UP(byte_len,
(flags & AT24_FLAG_ADDR16) ? 65536 : 256);
}
if ((flags & AT24_FLAG_SERIAL) && (flags & AT24_FLAG_MAC)) {
dev_err(dev,