blob: bed745dda31f4f6615292b1b157e13ed6215afbe (
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#!/bin/bash
# Purpose:
# The purpose of the script is to change the CB/CL ratio setting of the hotswap controller from 1.9x to 3.9x
I2C_BUS=11
CHIP_ADDR=0x15
GPIO_ID=91 #Revision ID
GPIO_BasePath=/sys/class/gpio
function set_hotswap_reg()
{
#set reg "0xd9" bit 3 to 1
i2cset -f -y $I2C_BUS $CHIP_ADDR 0xd9 0x08
}
function get_hotswap_value()
{
#get the value of reg "0xd9", return value should be "0x08"
echo "$(i2cget -f -y $I2C_BUS $CHIP_ADDR 0xd9)"
}
function export_gpio()
{
if [ -d "$GPIO_BasePath/gpio$GPIO_ID" ]; then
echo "gpio$GPIO_ID folder exist, skip export."
else
echo "Export gpio$GPIO_ID..."
echo $GPIO_ID > $GPIO_BasePath/export
fi
}
function get_gpio_value()
{
echo "$(cat $GPIO_BasePath/gpio$GPIO_ID/value)"
}
function setting_hotswap()
{
echo "setting hotswap controller..."
set_hotswap_reg
for i in {0..3};
do
if [ "$i" == "3" ];then
echo "change hotswap controller setting failed after retry 3 times."
else
hotswap_value=$(get_hotswap_value)
echo "get hotswap controller return value : $hotswap_value"
if [ "$hotswap_value" == "0x08" ];then
echo "change hotswap controller setting success."
break;
else
echo "hotswap controller setting failed, retry $i times..."
fi
fi
done
}
export_gpio
gpio_value=$(get_gpio_value)
if [ "$gpio_value" == "1" ];then
echo "gpio$GPIO_ID value is: $gpio_value, setting hotswap."
setting_hotswap
else
echo "gpio$GPIO_ID value is: $gpio_value, no need to set hotswap."
fi
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