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

3 files changed, 0 insertions, 36 deletions

diff --git a/firmware/target/hosted/xduoo/power-xduoo.c b/firmware/target/hosted/xduoo/power-xduoo.c
index 97a8dd4779..0b1e2f816e 100644
--- a/firmware/target/hosted/xduoo/power-xduoo.c
+++ b/firmware/target/hosted/xduoo/power-xduoo.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 xduoo_power_input_status(void)
-{
-    int present = 0;
-    sysfs_get_int(sysfs_pow_supply, &present);
-
-    return present ? POWER_INPUT_USB_CHARGER : POWER_INPUT_NONE;
-}
-
-bool xduoo_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 xduoo_power_get_battery_voltage(void)
 {
     int battery_voltage;
diff --git a/firmware/target/hosted/xduoo/power-xduoo.h b/firmware/target/hosted/xduoo/power-xduoo.h
index d573865ed2..ee016bd60b 100644
--- a/firmware/target/hosted/xduoo/power-xduoo.h
+++ b/firmware/target/hosted/xduoo/power-xduoo.h
@@ -23,9 +23,6 @@
 #include <stdbool.h>
 #include "config.h"
 
-unsigned int xduoo_power_input_status(void);
-bool xduoo_power_charging_status(void);
 unsigned int xduoo_power_get_battery_voltage(void);
 unsigned int xduoo_power_get_battery_capacity(void);
 #endif /* _POWER_XDUOO_H_ */
-
diff --git a/firmware/target/hosted/xduoo/powermgmt-xduoo.c b/firmware/target/hosted/xduoo/powermgmt-xduoo.c
index 35d9e45ffc..855072031e 100644
--- a/firmware/target/hosted/xduoo/powermgmt-xduoo.c
+++ b/firmware/target/hosted/xduoo/powermgmt-xduoo.c
@@ -44,12 +44,6 @@ const unsigned short const percent_to_volt_charge[11] =
       3485, 3780, 3836, 3857, 3890, 3930, 3986, 4062, 4158, 4185, 4196
 };
 
-unsigned int power_input_status(void)
-{
-    /* POWER_INPUT_USB_CHARGER, POWER_INPUT_NONE */
-    return xduoo_power_input_status();
-}
-
 #if defined(XDUOO_X3II)
 int _battery_voltage(void)
 {
@@ -63,8 +57,3 @@ int _battery_level(void)
     return xduoo_power_get_battery_capacity();
 }
 #endif
-
-bool charging_state(void)
-{
-    return xduoo_power_charging_status();
-}