hosted: Consolidate the code that polls the battery charging status

affects all hiby targets, fiiom3k, and ibasso dx50/dx90

As well as deduplicating a small pile of code, this also implements
hysteresis so we're not doing a sysfs read/lookup multiple times
back-to-back every time the power management tick fires.

Change-Id: I2f7672acbb36341becf67e07960c24c681270d09

1 files changed, 0 insertions, 22 deletions

diff --git a/firmware/target/hosted/aigo/power-erosq.c b/firmware/target/hosted/aigo/power-erosq.c
index 0a4f820337..73fa5fe972 100644
--- a/firmware/target/hosted/aigo/power-erosq.c
+++ b/firmware/target/hosted/aigo/power-erosq.c
@@ -35,28 +35,6 @@ const char * const sysfs_bat_voltage =
 const char * const sysfs_bat_capacity =
     "/sys/class/power_supply/battery/capacity";
 
-const char * const sysfs_bat_status =
-    "/sys/class/power_supply/battery/status";
-
-const char * const sysfs_pow_supply =
-    "/sys/class/power_supply/usb/present";
-
-unsigned int erosq_power_input_status(void)
-{
-    int present = 0;
-    sysfs_get_int(sysfs_pow_supply, &present);
-
-    return present ? POWER_INPUT_USB_CHARGER : POWER_INPUT_NONE;
-}
-
-bool erosq_power_charging_status(void)
-{
-    char buf[12] = {0};
-    sysfs_get_string(sysfs_bat_status, buf, sizeof(buf));
-
-    return (strncmp(buf, "Charging", 8) == 0);
-}
-
 unsigned int erosq_power_get_battery_voltage(void)
 {
     int battery_voltage;