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X-OriginatorOrg: axis.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Feb 2024 10:06:22.0088 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3ed88a4d-816c-45a9-4255-08dc31326ca1 X-MS-Exchange-CrossTenant-Id: 78703d3c-b907-432f-b066-88f7af9ca3af X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=78703d3c-b907-432f-b066-88f7af9ca3af;Ip=[195.60.68.100];Helo=[mail.axis.com] X-MS-Exchange-CrossTenant-AuthSource: AMS1EPF00000047.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU0PR02MB8739 Since all of the regs in the bq27xxx_reg_cache are now cached, a simple property read (such as temperature) will need nine I2C transmissions. Introduce a new module parameter to enable the reg cache to be configured, which decrease the amount of unnecessary I2C transmission and preventing the error -16 (EBUSY) happen when working on an I2C bus that is shared by many devices. Signed-off-by: Hermes Zhang --- drivers/power/supply/bq27xxx_battery.c | 65 +++++++++++++++++++------- include/linux/power/bq27xxx_battery.h | 9 ++++ 2 files changed, 58 insertions(+), 16 deletions(-) diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c index 1c4a9d137744..45fd956ec961 100644 --- a/drivers/power/supply/bq27xxx_battery.c +++ b/drivers/power/supply/bq27xxx_battery.c @@ -1100,6 +1100,11 @@ module_param_cb(poll_interval, ¶m_ops_poll_interval, &poll_interval, 0644); MODULE_PARM_DESC(poll_interval, "battery poll interval in seconds - 0 disables polling"); +static unsigned int bq27xxx_cache_mask = 0xFF; +module_param(bq27xxx_cache_mask, uint, 0644); +MODULE_PARM_DESC(bq27xxx_cache_mask, + "mask for bq27xxx reg cache - 0 disables reg cache"); + /* * Common code for BQ27xxx devices */ @@ -1842,21 +1847,29 @@ static void bq27xxx_battery_update_unlocked(struct bq27xxx_device_info *di) if ((cache.flags & 0xff) == 0xff) cache.flags = -1; /* read error */ if (cache.flags >= 0) { - cache.temperature = bq27xxx_battery_read_temperature(di); - if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR) + if (bq27xxx_cache_mask & BQ27XXX_CACHE_TEMP) + cache.temperature = bq27xxx_battery_read_temperature(di); + if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR && + bq27xxx_cache_mask & BQ27XXX_CACHE_TTE) cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE); - if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR) + if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR && + bq27xxx_cache_mask & BQ27XXX_CACHE_TTECP) cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP); - if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR) + if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR && + bq27xxx_cache_mask & BQ27XXX_CACHE_TTF) cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF); - cache.charge_full = bq27xxx_battery_read_fcc(di); - cache.capacity = bq27xxx_battery_read_soc(di); - if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR) + if (bq27xxx_cache_mask & BQ27XXX_CACHE_CHARGE_FULL) + cache.charge_full = bq27xxx_battery_read_fcc(di); + if (bq27xxx_cache_mask & BQ27XXX_CACHE_CAPACITY) + cache.capacity = bq27xxx_battery_read_soc(di); + if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR && + bq27xxx_cache_mask & BQ27XXX_CACHE_ENERGY) cache.energy = bq27xxx_battery_read_energy(di); di->cache.flags = cache.flags; cache.health = bq27xxx_battery_read_health(di); - if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR) + if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR && + bq27xxx_cache_mask & BQ27XXX_CACHE_CYCT) cache.cycle_count = bq27xxx_battery_read_cyct(di); /* @@ -2004,6 +2017,7 @@ static int bq27xxx_battery_get_property(struct power_supply *psy, { int ret = 0; struct bq27xxx_device_info *di = power_supply_get_drvdata(psy); + int tmp; mutex_lock(&di->lock); if (time_is_before_jiffies(di->last_update + 5 * HZ)) @@ -2027,24 +2041,37 @@ static int bq27xxx_battery_get_property(struct power_supply *psy, ret = bq27xxx_battery_current_and_status(di, val, NULL, NULL); break; case POWER_SUPPLY_PROP_CAPACITY: - ret = bq27xxx_simple_value(di->cache.capacity, val); + tmp = bq27xxx_cache_mask & BQ27XXX_CACHE_CAPACITY ? + di->cache.capacity : bq27xxx_battery_read_soc(di); + ret = bq27xxx_simple_value(tmp, val); break; case POWER_SUPPLY_PROP_CAPACITY_LEVEL: ret = bq27xxx_battery_capacity_level(di, val); break; case POWER_SUPPLY_PROP_TEMP: - ret = bq27xxx_simple_value(di->cache.temperature, val); + tmp = bq27xxx_cache_mask & BQ27XXX_CACHE_TEMP ? + di->cache.temperature : bq27xxx_battery_read_temperature(di); + ret = bq27xxx_simple_value(tmp, val); if (ret == 0) val->intval -= 2731; /* convert decidegree k to c */ break; case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: - ret = bq27xxx_simple_value(di->cache.time_to_empty, val); + tmp = bq27xxx_cache_mask & BQ27XXX_CACHE_TTE ? + di->cache.time_to_empty : + bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE); + ret = bq27xxx_simple_value(tmp, val); break; case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: - ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val); + tmp = bq27xxx_cache_mask & BQ27XXX_CACHE_TTECP ? + di->cache.time_to_empty_avg : + bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP); + ret = bq27xxx_simple_value(tmp, val); break; case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW: - ret = bq27xxx_simple_value(di->cache.time_to_full, val); + tmp = bq27xxx_cache_mask & BQ27XXX_CACHE_TTF ? + di->cache.time_to_full : + bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF); + ret = bq27xxx_simple_value(tmp, val); break; case POWER_SUPPLY_PROP_TECHNOLOGY: if (di->opts & BQ27XXX_O_MUL_CHEM) @@ -2059,7 +2086,9 @@ static int bq27xxx_battery_get_property(struct power_supply *psy, ret = bq27xxx_simple_value(bq27xxx_battery_read_rc(di), val); break; case POWER_SUPPLY_PROP_CHARGE_FULL: - ret = bq27xxx_simple_value(di->cache.charge_full, val); + tmp = bq27xxx_cache_mask & BQ27XXX_CACHE_CHARGE_FULL ? + di->cache.charge_full : bq27xxx_battery_read_fcc(di); + ret = bq27xxx_simple_value(tmp, val); break; case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: ret = bq27xxx_simple_value(di->charge_design_full, val); @@ -2072,10 +2101,14 @@ static int bq27xxx_battery_get_property(struct power_supply *psy, case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: return -EINVAL; case POWER_SUPPLY_PROP_CYCLE_COUNT: - ret = bq27xxx_simple_value(di->cache.cycle_count, val); + tmp = bq27xxx_cache_mask & BQ27XXX_CACHE_CYCT ? + di->cache.cycle_count : bq27xxx_battery_read_cyct(di); + ret = bq27xxx_simple_value(tmp, val); break; case POWER_SUPPLY_PROP_ENERGY_NOW: - ret = bq27xxx_simple_value(di->cache.energy, val); + tmp = bq27xxx_cache_mask & BQ27XXX_CACHE_ENERGY ? + di->cache.energy : bq27xxx_battery_read_energy(di); + ret = bq27xxx_simple_value(tmp, val); break; case POWER_SUPPLY_PROP_POWER_AVG: ret = bq27xxx_battery_pwr_avg(di, val); diff --git a/include/linux/power/bq27xxx_battery.h b/include/linux/power/bq27xxx_battery.h index 7d8025fb74b7..29d1e7107ee2 100644 --- a/include/linux/power/bq27xxx_battery.h +++ b/include/linux/power/bq27xxx_battery.h @@ -4,6 +4,15 @@ #include +#define BQ27XXX_CACHE_TEMP (1 << 0) +#define BQ27XXX_CACHE_TTE (1 << 1) +#define BQ27XXX_CACHE_TTECP (1 << 2) +#define BQ27XXX_CACHE_TTF (1 << 3) +#define BQ27XXX_CACHE_CHARGE_FULL (1 << 4) +#define BQ27XXX_CACHE_CYCT (1 << 5) +#define BQ27XXX_CACHE_CAPACITY (1 << 6) +#define BQ27XXX_CACHE_ENERGY (1 << 7) + enum bq27xxx_chip { BQ27000 = 1, /* bq27000, bq27200 */ BQ27010, /* bq27010, bq27210 */ -- 2.39.2