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Tue, 02 Jun 2026 13:11:38 -0700 (PDT) Received: from alchark-surface.localdomain ([5.194.92.128]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-490b63e6720sm2588515e9.13.2026.06.02.13.11.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Jun 2026 13:11:38 -0700 (PDT) From: Alexey Charkov Date: Wed, 03 Jun 2026 00:10:54 +0400 Subject: [PATCH v7 6/7] regulator: bq257xx: Add support for BQ25792 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260603-bq25792-v7-6-d487bed276d0@flipper.net> References: <20260603-bq25792-v7-0-d487bed276d0@flipper.net> In-Reply-To: <20260603-bq25792-v7-0-d487bed276d0@flipper.net> To: Chris Morgan , Mark Brown , Sebastian Reichel , Liam Girdwood , Lee Jones Cc: linux-kernel@vger.kernel.org, Sebastian Reichel , linux-pm@vger.kernel.org, Alexey Charkov X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=5043; i=alchark@flipper.net; h=from:subject:message-id; bh=Vi8lBOp630ilsbWu7TQVgNwOksr7IIsbE6AqM8rs6Ns=; b=owGbwMvMwCW2adGNfoHIK0sZT6slMWTJWzyf3xwg9UG1av6tOUcdLHNUtstefKRyJ7naNVPK4 oTozCynjoksDGJcDJZiiixzvy2xnWrEN2uXh8dXmDmsTCBDpEUaGICAhYEvNzGv1EjHSM9U21DP 0EjHWMeIgYtTAKZ6fRYjw1uZ6uumO6e4bv0vcch77uOOrMf5TDP5r/h9uCftcOtg6jSG/9Ercni l7qqsMSrwntbo235hVoePkNw62yUL2u3jizW28wEA X-Developer-Key: i=alchark@flipper.net; a=openpgp; fpr=9DF6A43D95320E9ABA4848F5B2A2D88F1059D4A5 Add support for TI BQ25792, an integrated battery charger and buck/boost regulator. This enables VBUS output from the charger's boost converter for use in USB OTG applications, supporting 2.8-22V output at up to 3.32A with 10mV and 40mA resolution. Acked-by: Mark Brown Signed-off-by: Alexey Charkov --- drivers/regulator/bq257xx-regulator.c | 98 ++++++++++++++++++++++++++++++++++- 1 file changed, 97 insertions(+), 1 deletion(-) diff --git a/drivers/regulator/bq257xx-regulator.c b/drivers/regulator/bq257xx-regulator.c index 913ca9186bf1..fec75b23cd40 100644 --- a/drivers/regulator/bq257xx-regulator.c +++ b/drivers/regulator/bq257xx-regulator.c @@ -31,6 +31,32 @@ static int bq25703_vbus_get_cur_limit(struct regulator_dev *rdev) return FIELD_GET(BQ25703_OTG_CUR_MASK, reg) * BQ25703_OTG_CUR_STEP_UA; } +static int bq25792_vbus_get_cur_limit(struct regulator_dev *rdev) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + int ret; + unsigned int reg; + + ret = regmap_read(regmap, BQ25792_REG0D_IOTG_REGULATION, ®); + if (ret) + return ret; + return FIELD_GET(BQ25792_REG0D_IOTG_MASK, reg) * BQ25792_OTG_CUR_STEP_UA; +} + +static int bq25792_vbus_get_voltage_sel(struct regulator_dev *rdev) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + __be16 reg; + int ret; + + ret = regmap_raw_read(regmap, BQ25792_REG0B_VOTG_REGULATION, + ®, sizeof(reg)); + if (ret) + return ret; + + return FIELD_GET(BQ25792_REG0B_VOTG_MASK, be16_to_cpu(reg)); +} + /* * Check if the minimum current and maximum current requested are * sane values, then set the register accordingly. @@ -54,6 +80,37 @@ static int bq25703_vbus_set_cur_limit(struct regulator_dev *rdev, FIELD_PREP(BQ25703_OTG_CUR_MASK, reg)); } +static int bq25792_vbus_set_cur_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int reg; + + if ((min_uA > BQ25792_OTG_CUR_MAX_UA) || + (max_uA < BQ25792_OTG_CUR_MIN_UA)) + return -EINVAL; + + reg = (max_uA / BQ25792_OTG_CUR_STEP_UA); + + /* Catch rounding errors since our step is 40000uA. */ + if ((reg * BQ25792_OTG_CUR_STEP_UA) < min_uA) + return -EINVAL; + + return regmap_write(regmap, BQ25792_REG0D_IOTG_REGULATION, + FIELD_PREP(BQ25792_REG0D_IOTG_MASK, reg)); +} + +static int bq25792_vbus_set_voltage_sel(struct regulator_dev *rdev, + unsigned int sel) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + __be16 reg; + + reg = cpu_to_be16(FIELD_PREP(BQ25792_REG0B_VOTG_MASK, sel)); + return regmap_raw_write(regmap, BQ25792_REG0B_VOTG_REGULATION, + ®, sizeof(reg)); +} + static int bq25703_vbus_enable(struct regulator_dev *rdev) { struct bq257xx_reg_data *pdata = rdev_get_drvdata(rdev); @@ -101,6 +158,34 @@ static const struct regulator_desc bq25703_vbus_desc = { .vsel_mask = BQ25703_OTG_VOLT_MASK, }; +static const struct regulator_ops bq25792_vbus_ops = { + /* No GPIO for enabling the OTG regulator */ + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .list_voltage = regulator_list_voltage_linear, + .get_voltage_sel = bq25792_vbus_get_voltage_sel, + .set_voltage_sel = bq25792_vbus_set_voltage_sel, + .get_current_limit = bq25792_vbus_get_cur_limit, + .set_current_limit = bq25792_vbus_set_cur_limit, +}; + +static const struct regulator_desc bq25792_vbus_desc = { + .name = "vbus", + .of_match = of_match_ptr("vbus"), + .regulators_node = of_match_ptr("regulators"), + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .ops = &bq25792_vbus_ops, + .min_uV = BQ25792_OTG_VOLT_MIN_UV, + .uV_step = BQ25792_OTG_VOLT_STEP_UV, + .n_voltages = BQ25792_OTG_VOLT_NUM_VOLT, + .enable_mask = BQ25792_REG12_EN_OTG, + .enable_reg = BQ25792_REG12_CHARGER_CONTROL_3, + .enable_val = BQ25792_REG12_EN_OTG, + .disable_val = 0, +}; + /* Get optional GPIO for OTG regulator enable. */ static void bq257xx_reg_dt_parse_gpio(struct platform_device *pdev) { @@ -141,6 +226,7 @@ static void bq257xx_reg_dt_parse_gpio(struct platform_device *pdev) static int bq257xx_regulator_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct bq257xx_device *bq = dev_get_drvdata(pdev->dev.parent); struct bq257xx_reg_data *pdata; struct device_node *np = dev->of_node; struct regulator_config cfg = {}; @@ -152,7 +238,17 @@ static int bq257xx_regulator_probe(struct platform_device *pdev) if (!pdata) return -ENOMEM; - pdata->desc = bq25703_vbus_desc; + switch (bq->type) { + case BQ25703A: + pdata->desc = bq25703_vbus_desc; + break; + case BQ25792: + pdata->desc = bq25792_vbus_desc; + break; + default: + return dev_err_probe(&pdev->dev, -EINVAL, + "Unsupported device type\n"); + } platform_set_drvdata(pdev, pdata); bq257xx_reg_dt_parse_gpio(pdev); -- 2.53.0