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Wed, 29 Apr 2026 00:41:46 -0700 (PDT) Received: from wenstp920.tpe.corp.google.com ([2a00:79e0:201d:8:e49b:67f9:cdcb:8366]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-364a439248fsm1341528a91.9.2026.04.29.00.41.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Apr 2026 00:41:45 -0700 (PDT) From: Chen-Yu Tsai To: Mark Brown , Liam Girdwood , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno Cc: Chen-Yu Tsai , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org Subject: [PATCH v2 6/6] regulator: mt6359: Add proper ldo_vcn33_[12] regulators Date: Wed, 29 Apr 2026 15:41:12 +0800 Message-ID: <20260429074113.3720271-7-wenst@chromium.org> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog In-Reply-To: <20260429074113.3720271-1-wenst@chromium.org> References: <20260429074113.3720271-1-wenst@chromium.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The ldo_vcn33_[12]_wifi and ldo_vcn33_[12]_bt are just two regulator outputs instead of four. The wifi and bt parts refer to separate enable bits that are OR-ed together to affect the actual regulator output. The separate bits allow the wifi and bt stacks to enable their power without coordination between them. These have been deprecated in favor of proper nodes matching the output. Add proper ldo_vcn33_[12] regulators to replace the existing ones. The enable status is synced to just one of the two enable bits, and the other is forced off. This makes the handling in other bits simpler. The existing *_(bt|wifi) regulators are converted to no-op regulators that are fed from their new respective ldo_vcn33_[12] regulator. This allows existing device trees to continue to work. Signed-off-by: Chen-Yu Tsai --- Changes since v1: - Instead of dropping one regulator from each output, add a new one for each output; the existing *_(bt|wifi) ones are then supplied from the new one --- drivers/regulator/mt6359-regulator.c | 179 +++++++++++++++++---- include/linux/regulator/mt6359-regulator.h | 10 +- 2 files changed, 154 insertions(+), 35 deletions(-) diff --git a/drivers/regulator/mt6359-regulator.c b/drivers/regulator/mt6359-regulator.c index fa97c3189df5..cd489adf9a2a 100644 --- a/drivers/regulator/mt6359-regulator.c +++ b/drivers/regulator/mt6359-regulator.c @@ -166,6 +166,20 @@ struct mt6359_regulator_info { .qi = BIT(0), \ } +#define MT6359_LDO_NOOP(match, _name, supply) \ +[MT6359_ID_##_name] = { \ + .desc = { \ + .name = #_name, \ + .supply_name = supply, \ + .of_match = of_match_ptr(match), \ + .regulators_node = of_match_ptr("regulators"), \ + .ops = &mt6359_noop_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = MT6359_ID_##_name, \ + .owner = THIS_MODULE, \ + }, \ +} + static const unsigned int vsim1_voltages[] = { 0, 0, 0, 1700000, 1800000, 0, 0, 0, 2700000, 0, 0, 3000000, 3100000, }; @@ -475,6 +489,9 @@ static const struct regulator_ops mt6359p_vemc_ops = { .get_status = mt6359_get_status, }; +/* Used for backward-compatible placeholder regulators */ +static const struct regulator_ops mt6359_noop_ops = {}; + /* The array is indexed by id(MT6359_ID_XXX) */ static const struct mt6359_regulator_info mt6359_regulators[] = { MT6359_BUCK("buck_vs1", VS1, "vsys-vs1", 800000, 2200000, 12500, @@ -596,18 +613,12 @@ static const struct mt6359_regulator_info mt6359_regulators[] = { MT6359_DA_VCN13_B_EN_ADDR, MT6359_RG_VCN13_VOSEL_ADDR, MT6359_RG_VCN13_VOSEL_MASK << MT6359_RG_VCN13_VOSEL_SHIFT, 240), - MT6359_LDO("ldo_vcn33_1_bt", VCN33_1_BT, "vsys-ldo1", vcn33_voltages, + MT6359_LDO("ldo_vcn33_1", VCN33_1, "vsys-ldo1", vcn33_voltages, MT6359_RG_LDO_VCN33_1_EN_0_ADDR, MT6359_RG_LDO_VCN33_1_EN_0_SHIFT, MT6359_DA_VCN33_1_B_EN_ADDR, MT6359_RG_VCN33_1_VOSEL_ADDR, MT6359_RG_VCN33_1_VOSEL_MASK << MT6359_RG_VCN33_1_VOSEL_SHIFT, 240), - MT6359_LDO("ldo_vcn33_1_wifi", VCN33_1_WIFI, "vsys-ldo1", vcn33_voltages, - MT6359_RG_LDO_VCN33_1_EN_1_ADDR, - MT6359_RG_LDO_VCN33_1_EN_1_SHIFT, - MT6359_DA_VCN33_1_B_EN_ADDR, MT6359_RG_VCN33_1_VOSEL_ADDR, - MT6359_RG_VCN33_1_VOSEL_MASK << - MT6359_RG_VCN33_1_VOSEL_SHIFT, 240), MT6359_REG_FIXED("ldo_vaux18", VAUX18, "vsys-ldo2", MT6359_RG_LDO_VAUX18_EN_ADDR, MT6359_DA_VAUX18_B_EN_ADDR, 1800000), MT6359_LDO_LINEAR("ldo_vsram_others", VSRAM_OTHERS, "vs2-ldo1", 500000, 1293750, @@ -644,18 +655,12 @@ static const struct mt6359_regulator_info mt6359_regulators[] = { MT6359_DA_VEMC_B_EN_ADDR, MT6359_RG_VEMC_VOSEL_ADDR, MT6359_RG_VEMC_VOSEL_MASK << MT6359_RG_VEMC_VOSEL_SHIFT, 240), - MT6359_LDO("ldo_vcn33_2_bt", VCN33_2_BT, "vsys-ldo1", vcn33_voltages, + MT6359_LDO("ldo_vcn33_2", VCN33_2, "vsys-ldo1", vcn33_voltages, MT6359_RG_LDO_VCN33_2_EN_0_ADDR, MT6359_RG_LDO_VCN33_2_EN_0_SHIFT, MT6359_DA_VCN33_2_B_EN_ADDR, MT6359_RG_VCN33_2_VOSEL_ADDR, MT6359_RG_VCN33_2_VOSEL_MASK << MT6359_RG_VCN33_2_VOSEL_SHIFT, 240), - MT6359_LDO("ldo_vcn33_2_wifi", VCN33_2_WIFI, "vsys-ldo1", vcn33_voltages, - MT6359_RG_LDO_VCN33_2_EN_1_ADDR, - MT6359_RG_LDO_VCN33_2_EN_1_SHIFT, - MT6359_DA_VCN33_2_B_EN_ADDR, MT6359_RG_VCN33_2_VOSEL_ADDR, - MT6359_RG_VCN33_2_VOSEL_MASK << - MT6359_RG_VCN33_2_VOSEL_SHIFT, 240), MT6359_LDO("ldo_va12", VA12, "vs2-ldo2", va12_voltages, MT6359_RG_LDO_VA12_EN_ADDR, MT6359_RG_LDO_VA12_EN_SHIFT, MT6359_DA_VA12_B_EN_ADDR, MT6359_RG_VA12_VOSEL_ADDR, @@ -711,6 +716,11 @@ static const struct mt6359_regulator_info mt6359_regulators[] = { MT6359_RG_LDO_VSRAM_OTHERS_SSHUB_VOSEL_ADDR, MT6359_RG_LDO_VSRAM_OTHERS_SSHUB_VOSEL_MASK << MT6359_RG_LDO_VSRAM_OTHERS_SSHUB_VOSEL_SHIFT), + /* Placeholders for DT backward compatibility */ + MT6359_LDO_NOOP("ldo_vcn33_1_bt", VCN33_1_BT, "LDO_VCN33_1"), + MT6359_LDO_NOOP("ldo_vcn33_1_wifi", VCN33_1_WIFI, "LDO_VCN33_1"), + MT6359_LDO_NOOP("ldo_vcn33_2_bt", VCN33_2_BT, "LDO_VCN33_2"), + MT6359_LDO_NOOP("ldo_vcn33_2_wifi", VCN33_2_WIFI, "LDO_VCN33_2"), }; static const struct mt6359_regulator_info mt6359p_regulators[] = { @@ -835,18 +845,12 @@ static const struct mt6359_regulator_info mt6359p_regulators[] = { MT6359P_DA_VCN13_B_EN_ADDR, MT6359P_RG_VCN13_VOSEL_ADDR, MT6359_RG_VCN13_VOSEL_MASK << MT6359_RG_VCN13_VOSEL_SHIFT, 240), - MT6359_LDO("ldo_vcn33_1_bt", VCN33_1_BT, "vsys-ldo1", vcn33_voltages, + MT6359_LDO("ldo_vcn33_1", VCN33_1, "vsys-ldo1", vcn33_voltages, MT6359P_RG_LDO_VCN33_1_EN_0_ADDR, MT6359_RG_LDO_VCN33_1_EN_0_SHIFT, MT6359P_DA_VCN33_1_B_EN_ADDR, MT6359P_RG_VCN33_1_VOSEL_ADDR, MT6359_RG_VCN33_1_VOSEL_MASK << MT6359_RG_VCN33_1_VOSEL_SHIFT, 240), - MT6359_LDO("ldo_vcn33_1_wifi", VCN33_1_WIFI, "vsys-ldo1", vcn33_voltages, - MT6359P_RG_LDO_VCN33_1_EN_1_ADDR, - MT6359P_RG_LDO_VCN33_1_EN_1_SHIFT, - MT6359P_DA_VCN33_1_B_EN_ADDR, MT6359P_RG_VCN33_1_VOSEL_ADDR, - MT6359_RG_VCN33_1_VOSEL_MASK << - MT6359_RG_VCN33_1_VOSEL_SHIFT, 240), MT6359_REG_FIXED("ldo_vaux18", VAUX18, "vsys-ldo2", MT6359P_RG_LDO_VAUX18_EN_ADDR, MT6359P_DA_VAUX18_B_EN_ADDR, 1800000), MT6359_LDO_LINEAR("ldo_vsram_others", VSRAM_OTHERS, "vs2-ldo1", 500000, 1293750, @@ -885,18 +889,12 @@ static const struct mt6359_regulator_info mt6359p_regulators[] = { MT6359P_RG_LDO_VEMC_VOSEL_0_ADDR, MT6359P_RG_LDO_VEMC_VOSEL_0_MASK << MT6359P_RG_LDO_VEMC_VOSEL_0_SHIFT), - MT6359_LDO("ldo_vcn33_2_bt", VCN33_2_BT, "vsys-ldo1", vcn33_voltages, + MT6359_LDO("ldo_vcn33_2", VCN33_2, "vsys-ldo1", vcn33_voltages, MT6359P_RG_LDO_VCN33_2_EN_0_ADDR, MT6359P_RG_LDO_VCN33_2_EN_0_SHIFT, MT6359P_DA_VCN33_2_B_EN_ADDR, MT6359P_RG_VCN33_2_VOSEL_ADDR, MT6359_RG_VCN33_2_VOSEL_MASK << MT6359_RG_VCN33_2_VOSEL_SHIFT, 240), - MT6359_LDO("ldo_vcn33_2_wifi", VCN33_2_WIFI, "vsys-ldo1", vcn33_voltages, - MT6359P_RG_LDO_VCN33_2_EN_1_ADDR, - MT6359_RG_LDO_VCN33_2_EN_1_SHIFT, - MT6359P_DA_VCN33_2_B_EN_ADDR, MT6359P_RG_VCN33_2_VOSEL_ADDR, - MT6359_RG_VCN33_2_VOSEL_MASK << - MT6359_RG_VCN33_2_VOSEL_SHIFT, 240), MT6359_LDO("ldo_va12", VA12, "vs2-ldo2", va12_voltages, MT6359P_RG_LDO_VA12_EN_ADDR, MT6359P_RG_LDO_VA12_EN_SHIFT, MT6359P_DA_VA12_B_EN_ADDR, MT6359P_RG_VA12_VOSEL_ADDR, @@ -951,27 +949,114 @@ static const struct mt6359_regulator_info mt6359p_regulators[] = { MT6359P_RG_LDO_VSRAM_OTHERS_SSHUB_VOSEL_ADDR, MT6359_RG_LDO_VSRAM_OTHERS_SSHUB_VOSEL_MASK << MT6359_RG_LDO_VSRAM_OTHERS_SSHUB_VOSEL_SHIFT), + /* Placeholders for DT backward compatibility */ + MT6359_LDO_NOOP("ldo_vcn33_1_bt", VCN33_1_BT, "LDO_VCN33_1"), + MT6359_LDO_NOOP("ldo_vcn33_1_wifi", VCN33_1_WIFI, "LDO_VCN33_1"), + MT6359_LDO_NOOP("ldo_vcn33_2_bt", VCN33_2_BT, "LDO_VCN33_2"), + MT6359_LDO_NOOP("ldo_vcn33_2_wifi", VCN33_2_WIFI, "LDO_VCN33_2"), +}; + +struct mt6359_vcn33_regs { + u32 wifi_en_reg; + u32 wifi_en_mask; + u32 bt_en_reg; + u32 bt_en_mask; +}; + +static const struct mt6359_vcn33_regs vcn33_regs[][2] = { + { /* MT6359 */ + { + .wifi_en_reg = MT6359_RG_LDO_VCN33_1_EN_1_ADDR, + .wifi_en_mask = BIT(MT6359_RG_LDO_VCN33_1_EN_1_SHIFT), + .bt_en_reg = MT6359_RG_LDO_VCN33_1_EN_0_ADDR, + .bt_en_mask = BIT(MT6359_RG_LDO_VCN33_1_EN_0_SHIFT), + }, { + .wifi_en_reg = MT6359_RG_LDO_VCN33_2_EN_1_ADDR, + .wifi_en_mask = BIT(MT6359_RG_LDO_VCN33_2_EN_1_SHIFT), + .bt_en_reg = MT6359_RG_LDO_VCN33_2_EN_0_ADDR, + .bt_en_mask = BIT(MT6359_RG_LDO_VCN33_2_EN_0_SHIFT), + } + }, { /* MT6359P */ + { + .wifi_en_reg = MT6359P_RG_LDO_VCN33_1_EN_1_ADDR, + .wifi_en_mask = BIT(MT6359P_RG_LDO_VCN33_1_EN_1_SHIFT), + .bt_en_reg = MT6359P_RG_LDO_VCN33_1_EN_0_ADDR, + .bt_en_mask = BIT(MT6359_RG_LDO_VCN33_1_EN_0_SHIFT), + }, { + .wifi_en_reg = MT6359P_RG_LDO_VCN33_2_EN_1_ADDR, + .wifi_en_mask = BIT(MT6359_RG_LDO_VCN33_2_EN_1_SHIFT), + .bt_en_reg = MT6359P_RG_LDO_VCN33_2_EN_0_ADDR, + .bt_en_mask = BIT(MT6359P_RG_LDO_VCN33_2_EN_0_SHIFT), + } + } }; +static int mt6359_sync_vcn33_setting(struct device *dev, unsigned int idx) +{ + struct mt6397_chip *mt6397 = dev_get_drvdata(dev->parent); + unsigned int val; + int ret; + + /* + * VCN33_[12]_WIFI and VCN33_[12]_BT are two separate enable bits for + * the same regulator. They share the same voltage setting and output + * pin. Instead of having two potentially conflicting regulators, just + * have one regulator. Sync the two enable bits and only use one in + * the regulator device. + */ + for (unsigned int i = 0; i < ARRAY_SIZE(vcn33_regs[0]); i++) { + u32 bt_en_mask = vcn33_regs[idx][i].bt_en_mask; + u32 wifi_en_mask = vcn33_regs[idx][i].wifi_en_mask; + + ret = regmap_read(mt6397->regmap, vcn33_regs[idx][i].wifi_en_reg, &val); + if (ret) + return dev_err_probe(dev, ret, "Failed to read VCN33_%u_WIFI setting\n", i); + + if (!(val & wifi_en_mask)) + continue; + + /* Sync VCN33_[12]_WIFI enable status to VCN33_[12]_BT */ + ret = regmap_update_bits(mt6397->regmap, vcn33_regs[idx][i].bt_en_reg, + bt_en_mask, bt_en_mask); + if (ret) + return dev_err_probe(dev, ret, + "Failed to sync VCN33_%u_WIFI setting to VCN33_%u_BT\n", + i, i); + + /* Disable VCN33_[12]_WIFI */ + ret = regmap_update_bits(mt6397->regmap, vcn33_regs[idx][i].wifi_en_reg, + wifi_en_mask, 0); + if (ret) + return dev_err_probe(dev, ret, "Failed to disable VCN33_%u_WIFI\n", i); + } + + return 0; +} + static int mt6359_regulator_probe(struct platform_device *pdev) { struct mt6397_chip *mt6397 = dev_get_drvdata(pdev->dev.parent); struct regulator_config config = {}; struct regulator_dev *rdev; const struct mt6359_regulator_info *mt6359_info; - const char *vio18_name; + const char *vio18_name, *vcn33_1_name, *vcn33_2_name; int i, hw_ver, ret; ret = regmap_read(mt6397->regmap, MT6359P_HWCID, &hw_ver); if (ret) return ret; - if (hw_ver >= MT6359P_CHIP_VER) + if (hw_ver >= MT6359P_CHIP_VER) { mt6359_info = mt6359p_regulators; - else + mt6359_sync_vcn33_setting(&pdev->dev, 1); + } else { mt6359_info = mt6359_regulators; + mt6359_sync_vcn33_setting(&pdev->dev, 0); + } vio18_name = mt6359_info[MT6359_ID_VIO18].desc.name; + vcn33_1_name = mt6359_info[MT6359_ID_VCN33_1].desc.name; + vcn33_2_name = mt6359_info[MT6359_ID_VCN33_2].desc.name; config.dev = mt6397->dev; config.regmap = mt6397->regmap; @@ -993,6 +1078,30 @@ static int mt6359_regulator_probe(struct platform_device *pdev) desc = _desc; } + /* Use vcn33_1's actual name as supply_name for vcn33_1_(bt|wifi) */ + if ((i == MT6359_ID_VCN33_1_BT || i == MT6359_ID_VCN33_1_WIFI) && + strcmp(desc->supply_name, vcn33_1_name) != 0) { + _desc = devm_kzalloc(&pdev->dev, sizeof(*_desc), GFP_KERNEL); + if (!_desc) + return -ENOMEM; + + memcpy(_desc, desc, sizeof(*_desc)); + _desc->supply_name = vcn33_1_name; + desc = _desc; + } + + /* Use vcn33_2's actual name as supply_name for vcn33_2_(bt|wifi) */ + if ((i == MT6359_ID_VCN33_2_BT || i == MT6359_ID_VCN33_2_WIFI) && + strcmp(desc->supply_name, vcn33_2_name) != 0) { + _desc = devm_kzalloc(&pdev->dev, sizeof(*_desc), GFP_KERNEL); + if (!_desc) + return -ENOMEM; + + memcpy(_desc, desc, sizeof(*_desc)); + _desc->supply_name = vcn33_2_name; + desc = _desc; + } + rdev = devm_regulator_register(&pdev->dev, desc, &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register %s\n", mt6359_info->desc.name); @@ -1002,6 +1111,14 @@ static int mt6359_regulator_probe(struct platform_device *pdev) /* Save vio18 name for vbbck */ if (i == MT6359_ID_VIO18) vio18_name = rdev_get_name(rdev); + + /* Save vcn33_1 name for vbbck */ + if (i == MT6359_ID_VCN33_1) + vcn33_1_name = rdev_get_name(rdev); + + /* Save vcn33_2 name for vbbck */ + if (i == MT6359_ID_VCN33_2) + vcn33_2_name = rdev_get_name(rdev); } return 0; diff --git a/include/linux/regulator/mt6359-regulator.h b/include/linux/regulator/mt6359-regulator.h index 6d6e5a58f482..ce2cd0fc9d95 100644 --- a/include/linux/regulator/mt6359-regulator.h +++ b/include/linux/regulator/mt6359-regulator.h @@ -29,8 +29,7 @@ enum { MT6359_ID_VCN18, MT6359_ID_VFE28, MT6359_ID_VCN13, - MT6359_ID_VCN33_1_BT, - MT6359_ID_VCN33_1_WIFI, + MT6359_ID_VCN33_1, MT6359_ID_VAUX18, MT6359_ID_VSRAM_OTHERS, MT6359_ID_VEFUSE, @@ -39,8 +38,7 @@ enum { MT6359_ID_VBIF28, MT6359_ID_VIO28, MT6359_ID_VEMC, - MT6359_ID_VCN33_2_BT, - MT6359_ID_VCN33_2_WIFI, + MT6359_ID_VCN33_2, MT6359_ID_VA12, MT6359_ID_VA09, MT6359_ID_VRF18, @@ -51,6 +49,10 @@ enum { MT6359_ID_VSRAM_PROC1, MT6359_ID_VSIM2, MT6359_ID_VSRAM_OTHERS_SSHUB, + MT6359_ID_VCN33_1_BT, + MT6359_ID_VCN33_1_WIFI, + MT6359_ID_VCN33_2_BT, + MT6359_ID_VCN33_2_WIFI, MT6359_ID_RG_MAX, }; -- 2.54.0.545.g6539524ca2-goog