From f9977e0929a99edc583109693fd2aa0d404cc8ec Mon Sep 17 00:00:00 2001 From: Sue Chen Date: Mon, 1 Nov 2021 15:11:03 +0800 Subject: quackingstick: support thermal charge policy The charging limitation: While the DUT is enter OS, sample temperature as charger task Level | low T'C | high T'C | current | (Tsens > T) | (Tsens < T) | (mA) ------------------------------------------------ 0 | 0 | 50 | 3000 (Normal charge) 1 | 48 | 53 | 1500 2 | 51 | 56 | 1000 3 | 54 | 100 | 800 BUG=b:196997371 BRANCH=trogdor TEST=use console cmd chgstate to check requested_current is as expected. Signed-off-by: Sue Chen Change-Id: I1665f65d952cfd6bd292188b573997100384278f Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3255091 Reviewed-by: Wai-Hong Tam Commit-Queue: Bob Moragues --- board/quackingstick/usbc_config.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'board/quackingstick') diff --git a/board/quackingstick/usbc_config.c b/board/quackingstick/usbc_config.c index 8f3fb02c30..b41eb2ecf1 100644 --- a/board/quackingstick/usbc_config.c +++ b/board/quackingstick/usbc_config.c @@ -8,7 +8,9 @@ #include "charger.h" #include "charger/isl923x_public.h" #include "charge_state.h" +#include "temp_sensor.h" #include "usb_pd.h" +#include "util.h" #define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args) #define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args) @@ -21,14 +23,50 @@ const struct charger_config_t chg_chips[] = { }, }; +struct temp_chg_step { + int low; /* temp thershold ('C) to lower level*/ + int high; /* temp thershold ('C) to higher level */ + int current; /* charging limitation (mA) */ +}; + +static const struct temp_chg_step temp_chg_table[] = { + {.low = 0, .high = 50, .current = 3000}, /* Lv0: normal charge */ + {.low = 48, .high = 53, .current = 1500}, + {.low = 51, .high = 56, .current = 1000}, + {.low = 54, .high = 100, .current = 800}, +}; +#define NUM_TEMP_CHG_LEVELS ARRAY_SIZE(temp_chg_table) + int charger_profile_override(struct charge_state_data *curr) { + static int current_level; + int charger_temp, charger_temp_c; int usb_mv; int port; if (curr->state != ST_CHARGE) return 0; + /* charge current control depends on temp if the system is on */ + if (chipset_in_state(CHIPSET_STATE_ON)) { + temp_sensor_read(TEMP_SENSOR_SYS2, &charger_temp); + charger_temp_c = K_TO_C(charger_temp); + + if (charger_temp_c <= temp_chg_table[current_level].low) + current_level--; + else if (charger_temp_c >= temp_chg_table[current_level].high) + current_level++; + + if (current_level < 0) + current_level = 0; + + if (current_level >= NUM_TEMP_CHG_LEVELS) + current_level = NUM_TEMP_CHG_LEVELS - 1; + + curr->requested_current = MIN(curr->requested_current, + temp_chg_table[current_level].current); + } + /* Lower the max requested voltage to 5V when battery is full. */ if (chipset_in_state(CHIPSET_STATE_ANY_OFF) && !(curr->batt.flags & BATT_FLAG_BAD_STATUS) && -- cgit v1.2.1