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([188.163.112.48]) by smtp.gmail.com with ESMTPSA id x6-20020ac24886000000b004f8555f7aa1sm1737117lfc.52.2023.07.30.10.27.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 30 Jul 2023 10:27:14 -0700 (PDT) From: Svyatoslav Ryhel To: Iskren Chernev , Krzysztof Kozlowski , Marek Szyprowski , Matheus Castello , Sebastian Reichel , Rob Herring , Conor Dooley , Svyatoslav Ryhel Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 3/3] power: max17040: get thermal data from adc if available Date: Sun, 30 Jul 2023 20:26:48 +0300 Message-Id: <20230730172648.71578-4-clamor95@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230730172648.71578-1-clamor95@gmail.com> References: <20230730172648.71578-1-clamor95@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Since fuel gauge does not support thermal monitoring, some vendors may couple this fuel gauge with thermal/adc sensor to monitor battery cell exact temperature. Add this feature by adding optional iio thermal channel. Signed-off-by: Svyatoslav Ryhel --- drivers/power/supply/max17040_battery.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c index 3301e8a4b16c..54db20637c87 100644 --- a/drivers/power/supply/max17040_battery.c +++ b/drivers/power/supply/max17040_battery.c @@ -18,6 +18,7 @@ #include #include #include +#include #define MAX17040_VCELL 0x02 #define MAX17040_SOC 0x04 @@ -142,6 +143,7 @@ struct max17040_chip { struct delayed_work work; struct power_supply *battery; struct chip_data data; + struct iio_channel *channel_temp; /* battery capacity */ int soc; @@ -404,6 +406,13 @@ static int max17040_get_property(struct power_supply *psy, case POWER_SUPPLY_PROP_STATUS: power_supply_get_property_from_supplier(psy, psp, val); break; + case POWER_SUPPLY_PROP_TEMP: + if (!chip->channel_temp) + return -ENODATA; + + iio_read_channel_processed_scale(chip->channel_temp, + &val->intval, 10); + break; default: return -EINVAL; } @@ -424,6 +433,7 @@ static enum power_supply_property max17040_battery_props[] = { POWER_SUPPLY_PROP_CAPACITY, POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_TEMP, }; static const struct power_supply_desc max17040_battery_desc = { @@ -469,6 +479,17 @@ static int max17040_probe(struct i2c_client *client) i2c_set_clientdata(client, chip); psy_cfg.drv_data = chip; + /* Switch to devm_iio_channel_get_optional when available */ + chip->channel_temp = devm_iio_channel_get(&client->dev, "temp"); + if (IS_ERR(chip->channel_temp)) { + ret = PTR_ERR(chip->channel_temp); + if (ret != -ENODEV) + return dev_err_probe(&client->dev, PTR_ERR(chip->channel_temp), + "failed to get temp\n"); + else + chip->channel_temp = NULL; + } + chip->battery = devm_power_supply_register(&client->dev, &max17040_battery_desc, &psy_cfg); if (IS_ERR(chip->battery)) { -- 2.39.2