From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id DE316184 for ; Wed, 24 May 2023 00:00:42 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8F77E139F; Tue, 23 May 2023 17:01:27 -0700 (PDT) Received: from slackpad.fritz.box (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id AD0463F67D; Tue, 23 May 2023 17:00:40 -0700 (PDT) From: Andre Przywara To: Lee Jones , Liam Girdwood , Chen-Yu Tsai , Mark Brown Cc: Martin Botka , martin.botka1@gmail.com, Shengyu Qu , Samuel Holland , Jernej Skrabec , linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v11 2/3] regulator: axp20x: Add support for AXP313a variant Date: Wed, 24 May 2023 01:00:11 +0100 Message-Id: <20230524000012.15028-3-andre.przywara@arm.com> X-Mailer: git-send-email 2.35.8 In-Reply-To: <20230524000012.15028-1-andre.przywara@arm.com> References: <20230524000012.15028-1-andre.przywara@arm.com> Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Martin Botka The AXP313a is your typical I2C controlled PMIC, although in a lighter fashion compared to the other X-Powers PMICs: it has only three DCDC rails, three LDOs, and no battery charging support. The AXP313a datasheet does not describe a register to change the DCDC switching frequency, and talks of it being fixed at 3 MHz. Check that the property allowing to change that frequency is absent from the DT, and bail out otherwise. The third LDO, RTCLDO, is fixed, and cannot even be turned on or off, programmatically. On top of that, its voltage is customisable (either 1.8V or 3.3V), which we cannot describe easily using the existing regulator wrapper functions. This should be fixed properly, using regulator-{min,max}-microvolt in the DT, but this requires more changes to the code. As some other PMICs (AXP2xx, AXP803) seem to paper over the same problem as well, we follow suit here and pretend it's a fixed 1.8V regulator. A proper fix can follow later. The BSP code seems to ignore this regulator altogether. Describe the AXP313A's voltage settings and switch registers, how the voltages are encoded, and connect this to the MFD device via its regulator ID. Signed-off-by: Martin Botka Signed-off-by: Andre Przywara Reviewed-by: Chen-Yu Tsai Reviewed-by: Mark Brown --- drivers/regulator/axp20x-regulator.c | 60 ++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) diff --git a/drivers/regulator/axp20x-regulator.c b/drivers/regulator/axp20x-regulator.c index 943172b197226..db77c72d39a0f 100644 --- a/drivers/regulator/axp20x-regulator.c +++ b/drivers/regulator/axp20x-regulator.c @@ -134,6 +134,11 @@ #define AXP22X_PWR_OUT_DLDO4_MASK BIT_MASK(6) #define AXP22X_PWR_OUT_ALDO3_MASK BIT_MASK(7) +#define AXP313A_DCDC1_NUM_VOLTAGES 107 +#define AXP313A_DCDC23_NUM_VOLTAGES 88 +#define AXP313A_DCDC_V_OUT_MASK GENMASK(6, 0) +#define AXP313A_LDO_V_OUT_MASK GENMASK(4, 0) + #define AXP803_PWR_OUT_DCDC1_MASK BIT_MASK(0) #define AXP803_PWR_OUT_DCDC2_MASK BIT_MASK(1) #define AXP803_PWR_OUT_DCDC3_MASK BIT_MASK(2) @@ -638,6 +643,48 @@ static const struct regulator_desc axp22x_drivevbus_regulator = { .ops = &axp20x_ops_sw, }; +static const struct linear_range axp313a_dcdc1_ranges[] = { + REGULATOR_LINEAR_RANGE(500000, 0, 70, 10000), + REGULATOR_LINEAR_RANGE(1220000, 71, 87, 20000), + REGULATOR_LINEAR_RANGE(1600000, 88, 106, 100000), +}; + +static const struct linear_range axp313a_dcdc2_ranges[] = { + REGULATOR_LINEAR_RANGE(500000, 0, 70, 10000), + REGULATOR_LINEAR_RANGE(1220000, 71, 87, 20000), +}; + +/* + * This is deviating from the datasheet. The values here are taken from the + * BSP driver and have been confirmed by measurements. + */ +static const struct linear_range axp313a_dcdc3_ranges[] = { + REGULATOR_LINEAR_RANGE(500000, 0, 70, 10000), + REGULATOR_LINEAR_RANGE(1220000, 71, 102, 20000), +}; + +static const struct regulator_desc axp313a_regulators[] = { + AXP_DESC_RANGES(AXP313A, DCDC1, "dcdc1", "vin1", + axp313a_dcdc1_ranges, AXP313A_DCDC1_NUM_VOLTAGES, + AXP313A_DCDC1_CONRTOL, AXP313A_DCDC_V_OUT_MASK, + AXP313A_OUTPUT_CONTROL, BIT(0)), + AXP_DESC_RANGES(AXP313A, DCDC2, "dcdc2", "vin2", + axp313a_dcdc2_ranges, AXP313A_DCDC23_NUM_VOLTAGES, + AXP313A_DCDC2_CONRTOL, AXP313A_DCDC_V_OUT_MASK, + AXP313A_OUTPUT_CONTROL, BIT(1)), + AXP_DESC_RANGES(AXP313A, DCDC3, "dcdc3", "vin3", + axp313a_dcdc3_ranges, AXP313A_DCDC23_NUM_VOLTAGES, + AXP313A_DCDC3_CONRTOL, AXP313A_DCDC_V_OUT_MASK, + AXP313A_OUTPUT_CONTROL, BIT(2)), + AXP_DESC(AXP313A, ALDO1, "aldo1", "vin1", 500, 3500, 100, + AXP313A_ALDO1_CONRTOL, AXP313A_LDO_V_OUT_MASK, + AXP313A_OUTPUT_CONTROL, BIT(3)), + AXP_DESC(AXP313A, DLDO1, "dldo1", "vin1", 500, 3500, 100, + AXP313A_DLDO1_CONRTOL, AXP313A_LDO_V_OUT_MASK, + AXP313A_OUTPUT_CONTROL, BIT(4)), + AXP_DESC_FIXED(AXP313A, RTC_LDO, "rtc-ldo", "vin1", 1800), +}; + /* DCDC ranges shared with AXP813 */ static const struct linear_range axp803_dcdc234_ranges[] = { REGULATOR_LINEAR_RANGE(500000, @@ -1040,6 +1087,15 @@ static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq) def = 3000; step = 150; break; + case AXP313A_ID: + /* The DCDC PWM frequency seems to be fixed to 3 MHz. */ + if (dcdcfreq != 0) { + dev_err(&pdev->dev, + "DCDC frequency on AXP313a is fixed to 3 MHz.\n"); + return -EINVAL; + } + + return 0; default: dev_err(&pdev->dev, "Setting DCDC frequency for unsupported AXP variant\n"); @@ -1232,6 +1288,10 @@ static int axp20x_regulator_probe(struct platform_device *pdev) drivevbus = of_property_read_bool(pdev->dev.parent->of_node, "x-powers,drive-vbus-en"); break; + case AXP313A_ID: + regulators = axp313a_regulators; + nregulators = AXP313A_REG_ID_MAX; + break; case AXP803_ID: regulators = axp803_regulators; nregulators = AXP803_REG_ID_MAX; -- 2.35.8