bluetooth: Add WCN3990 power control (4daefbd4) · Commits · e / devices / android_kernel_xiaomi_markw

Documentation/devicetree/bindings/bluetooth/bluetooth_power.txt

+14 −1

Original line number	Diff line number	Diff line
		@@ -6,6 +6,7 @@ Required properties:
		- compatible: Should be set to one of the following:
		qca,ar3002
		qca,qca6174
		qca,wcn3990
		- qca,bt-reset-gpio: GPIO pin to bring BT Controller out of reset

		Optional properties:
		@@ -18,7 +19,6 @@ Optional properties:
		- qca,bt-chip-pwd-supply: Chip power down gpio is required when bluetooth module
		and other modules like wifi co-exist in a singe chip and shares a
		common gpio to bring chip out of reset.

		- qca,bt-vdd-pa-voltage-level: specifies VDD PA voltage levels for supply.
		Should be specified in pairs (min, max), units uV
		- qca,bt-vdd-io-voltage-level: specifies VDD IO voltage levels for supply.
		@@ -29,6 +29,12 @@ Optional properties:
		Should be specified in pairs (min, max), units uV
		- qca,bt-vdd-core-voltage-level: specifies VDD CORE voltage levels for supply.
		Should be specified in pairs (min, max), units uV
		- qca,bt-vdd-io-current-level: specifies VDD IO current level in microamps
		- qca,bt-vdd-xtal-current-level: specifies VDD XTAL current level in microamps
		- qca,bt-vdd-core-current-level: specifies VDD CORE current level in microamps.
		- qca,bt-vdd-ldo-current-level: specifies VDD LDO current level in microamps.
		- qca,bt-vdd-pa-current-level: specifies VDD PA current level in microamps.
		- qca,bt-chip-pwd-current-level: specifies Chip Power current level in microamps.

		Example:
		bt-ar3002 {
		@@ -39,8 +45,15 @@ Example:
		qca,bt-vdd-xtal-supply = <&pm8994_l30>;
		qca,bt-vdd-core-supply = <&pm8994_s3>;
		qca,bt-chip-pwd-supply = <&ath_chip_pwd_l>;

		qca,bt-vdd-io-voltage-level = <1800000 1800000>;
		qca,bt-vdd-pa-voltage-level = <2900000 2900000>;
		qca,bt-vdd-xtal-voltage-level = <1800000 1800000>;
		qca,bt-vdd-core-voltage-level = <1300000 1300000>;

		qca,bt-vdd-io-current-level = <1>; /* LPM/PFM */
		qca,bt-vdd-xtal-current-level = <1>; /* LPM/PFM */
		qca,bt-vdd-core-current-level = <1>; /* LPM/PFM */
		qca,bt-vdd-ldo-current-level = <1>; /* LPM/PFM */
		qca,bt-vdd-pa-current-level = <1>; /* LPM/PFM */
		};

drivers/bluetooth/bluetooth-power.c

+36 −9

Original line number	Diff line number	Diff line
		/* Copyright (c) 2009-2010, 2013-2015 The Linux Foundation. All rights reserved.
		/* Copyright (c) 2009-2010, 2013-2016 The Linux Foundation. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		@@ -36,6 +36,7 @@
		static struct of_device_id bt_power_match_table[] = {
		{ .compatible = "qca,ar3002" },
		{ .compatible = "qca,qca6174" },
		{ .compatible = "qca,wcn3990" },
		{}
		};

		@@ -85,6 +86,16 @@ static int bt_vreg_enable(struct bt_power_vreg_data *vreg)
		}
		}

		if (vreg->load_uA >= 0) {
		rc = regulator_set_optimum_mode(vreg->reg,
		vreg->load_uA);
		if (rc < 0) {
		BT_PWR_ERR("vreg_set_mode(%s) failed rc=%d\n",
		vreg->name, rc);
		goto out;
		}
		}

		rc = regulator_enable(vreg->reg);
		if (rc < 0) {
		BT_PWR_ERR("regulator_enable(%s) failed. rc=%d\n",
		@@ -117,14 +128,19 @@ static int bt_vreg_disable(struct bt_power_vreg_data *vreg)

		if (vreg->set_voltage_sup) {
		/* Set the min voltage to 0 */
		rc = regulator_set_voltage(vreg->reg,
		0,
		rc = regulator_set_voltage(vreg->reg, 0,
		vreg->high_vol_level);
		if (rc < 0) {
		BT_PWR_ERR("vreg_set_vol(%s) failed rc=%d\n",
		vreg->name, rc);
		goto out;

		}
		}
		if (vreg->load_uA >= 0) {
		rc = regulator_set_optimum_mode(vreg->reg, 0);
		if (rc < 0) {
		BT_PWR_ERR("vreg_set_mode(%s) failed rc=%d\n",
		vreg->name, rc);
		}
		}
		}
		@@ -154,7 +170,7 @@ static int bt_configure_gpios(int on)
		int rc = 0;
		int bt_reset_gpio = bt_power_pdata->bt_gpio_sys_rst;

		BT_PWR_DBG("%s bt_gpio= %d on: %d", __func__, bt_reset_gpio, on);
		BT_PWR_DBG("bt_gpio= %d on: %d", bt_reset_gpio, on);

		if (on) {
		rc = gpio_request(bt_reset_gpio, "bt_sys_rst_n");
		@@ -211,7 +227,6 @@ static int bluetooth_power(int on)
		goto vdd_core_fail;
		}
		}

		if (bt_power_pdata->bt_vdd_pa) {
		rc = bt_configure_vreg(bt_power_pdata->bt_vdd_pa);
		if (rc < 0) {
		@@ -378,6 +393,7 @@ static int bt_dt_parse_vreg_info(struct device *dev,

		vreg->name = vreg_name;

		/* Parse voltage-level from each node */
		snprintf(prop_name, MAX_PROP_SIZE,
		"%s-voltage-level", vreg_name);
		prop = of_get_property(np, prop_name, &len);
		@@ -389,10 +405,21 @@ static int bt_dt_parse_vreg_info(struct device *dev,
		vreg->high_vol_level = be32_to_cpup(&prop[1]);
		}

		/* Parse current-level from each node */
		snprintf(prop_name, MAX_PROP_SIZE,
		"%s-current-level", vreg_name);
		ret = of_property_read_u32(np, prop_name, &vreg->load_uA);
		if (ret < 0) {
		BT_PWR_DBG("%s property is not valid\n", prop_name);
		vreg->load_uA = -1;
		ret = 0;
		}

		*vreg_data = vreg;
		BT_PWR_DBG("%s: vol=[%d %d]uV\n",
		BT_PWR_DBG("%s: vol=[%d %d]uV, current=[%d]uA\n",
		vreg->name, vreg->low_vol_level,
		vreg->high_vol_level);
		vreg->high_vol_level,
		vreg->load_uA);
		} else
		BT_PWR_INFO("%s: is not provided in device tree", vreg_name);

include/linux/bluetooth-power.h

+3 −1

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
		* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		@@ -27,6 +27,8 @@ struct bt_power_vreg_data {
		/* voltage levels to be set */
		unsigned int low_vol_level;
		unsigned int high_vol_level;
		/* current level to be set */
		unsigned int load_uA;
		/*
		* is set voltage supported for this regulator?
		* false => set voltage is not supported