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1.. SPDX-License-Identifier: GPL-2.0-or-later2 3Kernel driver pt5161l4=====================5 6Supported chips:7 8 * Astera Labs PT5161L9 10 Prefix: 'pt5161l'11 12 Addresses scanned: I2C 0x20 - 0x2713 14 Datasheet: Not publicly available.15 16Authors: Cosmo Chou <cosmo.chou@quantatw.com>17 18Description19-----------20 21This driver implements support for temperature monitoring of Astera Labs22PT5161L series PCIe retimer chips.23 24This driver implementation originates from the CSDK available at25https://github.com/facebook/openbmc/tree/helium/common/recipes-lib/retimer-v2.1426The communication protocol utilized is based on the I2C/SMBus standard.27 28Sysfs entries29----------------30 31================ ==============================================32temp1_input Measured temperature (in millidegrees Celsius)33================ ==============================================34 35Debugfs entries36----------------37 38================ ===============================39fw_load_status Firmware load status40fw_ver Firmware version of the retimer41heartbeat_status Heartbeat status42================ ===============================43