| #!/bin/sh |
| # Copyright 2018 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| # Parameters for Alan/Bigdaddy/Chell/Snappy. |
| i2c_bus="4" |
| slave_addr="0x0b" |
| ct_cmd="0x70" |
| data_len="15" |
| |
| # mosys may use 'i2c-dev', which may not be loaded yet. |
| modprobe i2c-dev 2>/dev/null || true |
| platform_vendor="$(mosys platform vendor)" |
| if [ "${platform_vendor}" = "HP" ]; then |
| # Get battery CT number in raw ascii form. |
| # The output format is "\xHH<char_1><char_2>..<char_n>. |
| oem_raw_string=$(ectool --ascii i2cxfer "${i2c_bus}" "${slave_addr}" "${data_len}" "${ct_cmd}") |
| # Get the number of valid characters. |
| num_chars=$(/usr/bin/printf "%d" "0$(echo "${oem_raw_string}" | cut -b 2-4)") |
| # Cut off the trailing/invalid characters (if any) and output the OEM data. |
| echo "${oem_raw_string}" | cut -b 5-$((4+num_chars)) |
| fi |
