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hosted: consolidate sysfs-based battery measurement code

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Several hosted targets read their battery state from a fixed
sysfs path. Get rid of the duplicated code by handling this
common case in power-linux.c.

Some targets use non-standard units in sysfs instead of the
typical microvolts / microamps, so allow the scale factors
to be overridden by the target.

Change-Id: I31dc4ffc7a2d2c066d00a74070f9f9849c1663d0
This commit is contained in:
Aidan MacDonald 2025-12-01 13:32:26 +00:00
parent 7ffdf50ba5
commit 806b71b2ed
20 changed files with 74 additions and 454 deletions
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63
firmware/target/hosted/power-linux.c
View file

@ -34,7 +34,38 @@
#endif
#ifdef BATTERY_DEV_NAME
#define BATTERY_STATUS_PATH "/sys/class/power_supply/" BATTERY_DEV_NAME "/status"
# define BATTERY_SYSFS_PATH "/sys/class/power_supply/" BATTERY_DEV_NAME
# define BATTERY_STATUS_PATH BATTERY_SYSFS_PATH "/status"
# define BATTERY_VOLTAGE_PATH BATTERY_SYSFS_PATH "/voltage_now"
# define BATTERY_CURRENT_PATH BATTERY_SYSFS_PATH "/current_now"
# define BATTERY_LEVEL_PATH BATTERY_SYSFS_PATH "/capacity"
#endif
/* Voltage is normally in microvolts */
#ifndef BATTERY_VOLTAGE_SCALE_MUL
# define BATTERY_VOLTAGE_SCALE_MUL 1
#endif
#ifndef BATTERY_VOLTAGE_SCALE_DIV
# define BATTERY_VOLTAGE_SCALE_DIV 1000
#endif
/* Current is normally in microamps */
#ifndef BATTERY_CURRENT_SCALE_MUL
# define BATTERY_CURRENT_SCALE_MUL 1
#endif
#ifndef BATTERY_CURRENT_SCALE_DIV
# define BATTERY_CURRENT_SCALE_DIV 1000
#endif
/* Level is normally in whole percentage points (0-100) */
#ifndef BATTERY_LEVEL_SCALE_MUL
# define BATTERY_LEVEL_SCALE_MUL 1
#endif
#ifndef BATTERY_LEVEL_SCALE_DIV
# define BATTERY_LEVEL_SCALE_DIV 1
#endif
#define POWER_STATUS_PATH "/sys/class/power_supply/" POWER_DEV_NAME "/online"
@ -55,6 +86,36 @@ bool charging_state(void)
}
return last_power;
}
#if (CONFIG_BATTERY_MEASURE & VOLTAGE_MEASURE)
int _battery_voltage(void)
{
int voltage = 0;
sysfs_get_int(BATTERY_VOLTAGE_PATH, &voltage);
return (voltage * BATTERY_VOLTAGE_SCALE_MUL) / BATTERY_VOLTAGE_SCALE_DIV;
}
#endif
#if (CONFIG_BATTERY_MEASURE & CURRENT_MEASURE)
int _battery_current(void)
{
int current = 0;
sysfs_get_int(BATTERY_CURRENT_PATH, &current);
return (current * BATTERY_CURRENT_SCALE_MUL) / BATTERY_CURRENT_SCALE_DIV;
}
#endif
#if (CONFIG_BATTERY_MEASURE & PERCENTAGE_MEASURE)
int _battery_level(void)
{
int level = 0;
sysfs_get_int(BATTERY_LEVEL_PATH, &level);
return (level * BATTERY_LEVEL_SCALE_MUL) / BATTERY_LEVEL_SCALE_DIV;
}
#endif
#endif
unsigned int power_input_status(void)