misc: i2c_eeprom: verify that the chip is functional at probe()
Read a single byte from EEPROM to verify that it is actually there.
This is equivalent to Linux kernel commit 00f0ea70d2b8 ("eeprom: at24:
check if the chip is functional in probe()").
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
hs: fixed style check prefer kernel type 'u8' over 'uint8_t'
diff --git a/drivers/misc/i2c_eeprom.c b/drivers/misc/i2c_eeprom.c
index f25d054..8f2349a 100644
--- a/drivers/misc/i2c_eeprom.c
+++ b/drivers/misc/i2c_eeprom.c
@@ -84,6 +84,14 @@
static int i2c_eeprom_std_probe(struct udevice *dev)
{
+ u8 test_byte;
+ int ret;
+
+ /* Verify that the chip is functional */
+ ret = i2c_eeprom_read(dev, 0, &test_byte, 1);
+ if (ret)
+ return -ENODEV;
+
return 0;
}