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| author | Nico Huber <nico.huber@secunet.com> | 2017-11-01 13:15:33 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-09-30 11:50:16 +0000 |
| commit | 9734af669768203349485bd76a4ad3c79c8bdc73 (patch) | |
| tree | 7395ab22c71f5e5a7b6f12b8e71aa449ba47cf2e /src/include/device/i2c_bus.h | |
| parent | 9529530766ed6f1ed17c2af11d51deca9a2092d6 (diff) | |
| download | coreboot-9734af669768203349485bd76a4ad3c79c8bdc73.tar.xz | |
device/i2c_bus: Add i2c_dev_read_at16()
i2c_dev_read_at16() sends a 16-bit offset to the I2C chip (for larger
EEPROM parts), then reads bytes up to a given length into a buffer.
Change-Id: I7516f3e5d9aca362c2b340aa5627d91510c09412
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/29478
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Diffstat (limited to 'src/include/device/i2c_bus.h')
| -rw-r--r-- | src/include/device/i2c_bus.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/include/device/i2c_bus.h b/src/include/device/i2c_bus.h index 6aa4f9ba9d..5302d20228 100644 --- a/src/include/device/i2c_bus.h +++ b/src/include/device/i2c_bus.h @@ -89,4 +89,12 @@ int i2c_dev_readb_at(struct device *, uint8_t off); */ int i2c_dev_writeb_at(struct device *, uint8_t off, uint8_t val); +/* + * Sends the 16-bit register offset `off` and reads `len` bytes into `buf`. + * + * Returns the number of bytes read on success, negative `enum cb_err` + * value on error. + */ +int i2c_dev_read_at16(struct device *, uint8_t *buf, size_t len, uint16_t off); + #endif /* _DEVICE_I2C_BUS_H_ */ |