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Wed, 13 Sep 2023 01:29:37 -0700 (PDT) Received: from wenstp920.tpe.corp.google.com ([2401:fa00:1:10:b24c:3be4:d952:d3b1]) by smtp.gmail.com with ESMTPSA id g6-20020aa78746000000b006901bd3a9e4sm418781pfo.104.2023.09.13.01.29.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Sep 2023 01:29:36 -0700 (PDT) From: Chen-Yu Tsai To: Lee Jones , Matthias Brugger , AngeloGioacchino Del Regno , Mark Brown Cc: Chen-Yu Tsai , Zhiyong Tao , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH v3 2/3] regulator: mt6358: Add output voltage fine tuning to fixed regulators Date: Wed, 13 Sep 2023 16:29:17 +0800 Message-ID: <20230913082919.1631287-3-wenst@chromium.org> X-Mailer: git-send-email 2.42.0.283.g2d96d420d3-goog In-Reply-To: <20230913082919.1631287-1-wenst@chromium.org> References: <20230913082919.1631287-1-wenst@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230913_012940_264150_EAE13E14 X-CRM114-Status: GOOD ( 15.43 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The "fixed" LDO regulators found on the MT6358 and MT6366 PMICs have either no voltage selection register, or only one valid setting. However these do have a fine voltage calibration setting that can slightly boost the output voltage from 0 mV to 100 mV, in 10 mV increments. Add support for this by changing these into linear range regulators. Some register definitions that are missing are also added. Signed-off-by: Chen-Yu Tsai Reviewed-by: AngeloGioacchino Del Regno Acked-by: Lee Jones --- This patch needs an ack from Lee. drivers/regulator/mt6358-regulator.c | 15 +++++++++++++-- include/linux/mfd/mt6358/registers.h | 6 ++++++ 2 files changed, 19 insertions(+), 2 deletions(-) diff --git a/drivers/regulator/mt6358-regulator.c b/drivers/regulator/mt6358-regulator.c index 935c7ad56c7e..ecb2cd1eb34f 100644 --- a/drivers/regulator/mt6358-regulator.c +++ b/drivers/regulator/mt6358-regulator.c @@ -123,10 +123,13 @@ struct mt6358_regulator_info { .type = REGULATOR_VOLTAGE, \ .id = MT6358_ID_##vreg, \ .owner = THIS_MODULE, \ - .n_voltages = 1, \ + .n_voltages = 11, \ + .vsel_reg = MT6358_##vreg##_ANA_CON0, \ + .vsel_mask = GENMASK(3, 0), \ .enable_reg = enreg, \ .enable_mask = BIT(enbit), \ .min_uV = volt, \ + .uV_step = 10000, \ }, \ .status_reg = MT6358_LDO_##vreg##_CON1, \ .qi = BIT(15), \ @@ -219,10 +222,13 @@ struct mt6358_regulator_info { .type = REGULATOR_VOLTAGE, \ .id = MT6366_ID_##vreg, \ .owner = THIS_MODULE, \ - .n_voltages = 1, \ + .n_voltages = 11, \ + .vsel_reg = MT6358_##vreg##_ANA_CON0, \ + .vsel_mask = GENMASK(3, 0), \ .enable_reg = enreg, \ .enable_mask = BIT(enbit), \ .min_uV = volt, \ + .uV_step = 10000, \ }, \ .status_reg = MT6358_LDO_##vreg##_CON1, \ .qi = BIT(15), \ @@ -482,8 +488,13 @@ static const struct regulator_ops mt6358_volt_table_ops = { .get_status = mt6358_get_status, }; +/* "Fixed" LDOs with output voltage calibration +0 ~ +10 mV */ static const struct regulator_ops mt6358_volt_fixed_ops = { .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = mt6358_get_buck_voltage_sel, + .set_voltage_time_sel = regulator_set_voltage_time_sel, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, diff --git a/include/linux/mfd/mt6358/registers.h b/include/linux/mfd/mt6358/registers.h index 3d33517f178c..5ea2590be710 100644 --- a/include/linux/mfd/mt6358/registers.h +++ b/include/linux/mfd/mt6358/registers.h @@ -262,6 +262,12 @@ #define MT6358_LDO_VBIF28_CON3 0x1db0 #define MT6358_VCAMA1_ANA_CON0 0x1e08 #define MT6358_VCAMA2_ANA_CON0 0x1e0c +#define MT6358_VFE28_ANA_CON0 0x1e10 +#define MT6358_VCN28_ANA_CON0 0x1e14 +#define MT6358_VBIF28_ANA_CON0 0x1e18 +#define MT6358_VAUD28_ANA_CON0 0x1e1c +#define MT6358_VAUX18_ANA_CON0 0x1e20 +#define MT6358_VXO22_ANA_CON0 0x1e24 #define MT6358_VCN33_ANA_CON0 0x1e28 #define MT6358_VSIM1_ANA_CON0 0x1e2c #define MT6358_VSIM2_ANA_CON0 0x1e30