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Sat, 06 Feb 2021 22:24:22 -0800 Received: from mtkmbs05n1.mediatek.inc (172.21.101.15) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sat, 6 Feb 2021 22:14:20 -0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs05n1.mediatek.inc (172.21.101.15) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 7 Feb 2021 14:14:19 +0800 Received: from mtksdaap41.mediatek.inc (172.21.77.4) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Sun, 7 Feb 2021 14:14:19 +0800 From: Hsin-Hsiung Wang To: Liam Girdwood , Mark Brown , "Rob Herring" , Matthias Brugger , Subject: [PATCH v4 2/3] regulator: mt6315: Add support for MT6315 regulator Date: Sun, 7 Feb 2021 14:14:16 +0800 Message-ID: <1612678457-11548-3-git-send-email-hsin-hsiung.wang@mediatek.com> X-Mailer: git-send-email 2.6.4 In-Reply-To: <1612678457-11548-1-git-send-email-hsin-hsiung.wang@mediatek.com> References: <1612678457-11548-1-git-send-email-hsin-hsiung.wang@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210207_012431_866528_A89B604F X-CRM114-Status: GOOD ( 25.52 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org, Project_Global_Chrome_Upstream_Group@mediatek.com, linux-mediatek@lists.infradead.org, Hsin-Hsiung Wang , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The MT6315 is a regulator found on boards based on MediaTek MT8192 and probably other SoCs. It connects as a slave to SoC using SPMI. Signed-off-by: Hsin-Hsiung Wang --- changes since v3: - refine the mt6315 regulator for better code quality. - remove unused registers. --- drivers/regulator/Kconfig | 10 + drivers/regulator/Makefile | 1 + drivers/regulator/mt6315-regulator.c | 299 +++++++++++++++++++++ include/linux/regulator/mt6315-regulator.h | 44 +++ 4 files changed, 354 insertions(+) create mode 100644 drivers/regulator/mt6315-regulator.c create mode 100644 include/linux/regulator/mt6315-regulator.h diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 53fa84f4d1e1..0787a5cd64e2 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -732,6 +732,16 @@ config REGULATOR_MT6311 This driver supports the control of different power rails of device through regulator interface. +config REGULATOR_MT6315 + tristate "MediaTek MT6315 PMIC" + depends on SPMI + select REGMAP_SPMI + help + Say y here to select this option to enable the power regulator of + MediaTek MT6315 PMIC. + This driver supports the control of different power rails of device + through regulator interface. + config REGULATOR_MT6323 tristate "MediaTek MT6323 PMIC" depends on MFD_MT6397 diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 680e539f6579..c50797e5f1f8 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -89,6 +89,7 @@ obj-$(CONFIG_REGULATOR_MP8859) += mp8859.o obj-$(CONFIG_REGULATOR_MP886X) += mp886x.o obj-$(CONFIG_REGULATOR_MPQ7920) += mpq7920.o obj-$(CONFIG_REGULATOR_MT6311) += mt6311-regulator.o +obj-$(CONFIG_REGULATOR_MT6315) += mt6315-regulator.o obj-$(CONFIG_REGULATOR_MT6323) += mt6323-regulator.o obj-$(CONFIG_REGULATOR_MT6358) += mt6358-regulator.o obj-$(CONFIG_REGULATOR_MT6360) += mt6360-regulator.o diff --git a/drivers/regulator/mt6315-regulator.c b/drivers/regulator/mt6315-regulator.c new file mode 100644 index 000000000000..d49a1534d8e9 --- /dev/null +++ b/drivers/regulator/mt6315-regulator.c @@ -0,0 +1,299 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (c) 2021 MediaTek Inc. + +#include +#include +#include +#include +#include +#include +#include +#include + +#define MT6315_BUCK_MODE_AUTO 0 +#define MT6315_BUCK_MODE_FORCE_PWM 1 +#define MT6315_BUCK_MODE_LP 2 + +struct mt6315_regulator_info { + struct regulator_desc desc; + u32 status_reg; + u32 lp_mode_mask; + u32 lp_mode_shift; +}; + +struct mt_regulator_init_data { + u32 modeset_mask[MT6315_VBUCK_MAX]; +}; + +struct mt6315_chip { + struct device *dev; + struct regmap *regmap; +}; + +#define MT_BUCK(_name, _bid, _vsel) \ +[_bid] = { \ + .desc = { \ + .name = _name, \ + .of_match = of_match_ptr(_name), \ + .regulators_node = "regulators", \ + .ops = &mt6315_volt_range_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = _bid, \ + .owner = THIS_MODULE, \ + .n_voltages = 0xbf, \ + .linear_ranges = mt_volt_range1, \ + .n_linear_ranges = ARRAY_SIZE(mt_volt_range1), \ + .vsel_reg = _vsel, \ + .vsel_mask = 0xff, \ + .enable_reg = MT6315_BUCK_TOP_CON0, \ + .enable_mask = BIT(_bid), \ + .of_map_mode = mt6315_map_mode, \ + }, \ + .status_reg = _bid##_DBG4, \ + .lp_mode_mask = BIT(_bid), \ + .lp_mode_shift = _bid, \ +} + +static const struct linear_range mt_volt_range1[] = { + REGULATOR_LINEAR_RANGE(0, 0, 0xbf, 6250), +}; + +static unsigned int mt6315_map_mode(u32 mode) +{ + switch (mode) { + case MT6315_BUCK_MODE_AUTO: + return REGULATOR_MODE_NORMAL; + case MT6315_BUCK_MODE_FORCE_PWM: + return REGULATOR_MODE_FAST; + case MT6315_BUCK_MODE_LP: + return REGULATOR_MODE_IDLE; + default: + return -EINVAL; + } +} + +static unsigned int mt6315_regulator_get_mode(struct regulator_dev *rdev) +{ + struct mt_regulator_init_data *init = rdev_get_drvdata(rdev); + const struct mt6315_regulator_info *info; + int ret, regval; + u32 modeset_mask; + + info = container_of(rdev->desc, struct mt6315_regulator_info, desc); + modeset_mask = init->modeset_mask[rdev_get_id(rdev)]; + ret = regmap_read(rdev->regmap, MT6315_BUCK_TOP_4PHASE_ANA_CON42, ®val); + if (ret != 0) { + dev_notice(&rdev->dev, "Failed to get mode: %d\n", ret); + return ret; + } + + if ((regval & modeset_mask) == modeset_mask) + return REGULATOR_MODE_FAST; + + ret = regmap_read(rdev->regmap, MT6315_BUCK_TOP_CON1, ®val); + if (ret != 0) { + dev_notice(&rdev->dev, "Failed to get lp mode: %d\n", ret); + return ret; + } + + if (regval & info->lp_mode_mask) + return REGULATOR_MODE_IDLE; + else + return REGULATOR_MODE_NORMAL; +} + +static int mt6315_regulator_set_mode(struct regulator_dev *rdev, + u32 mode) +{ + struct mt_regulator_init_data *init = rdev_get_drvdata(rdev); + const struct mt6315_regulator_info *info; + int ret, val, curr_mode; + u32 modeset_mask; + + info = container_of(rdev->desc, struct mt6315_regulator_info, desc); + modeset_mask = init->modeset_mask[rdev_get_id(rdev)]; + curr_mode = mt6315_regulator_get_mode(rdev); + switch (mode) { + case REGULATOR_MODE_FAST: + ret = regmap_update_bits(rdev->regmap, + MT6315_BUCK_TOP_4PHASE_ANA_CON42, + modeset_mask, + modeset_mask); + break; + case REGULATOR_MODE_NORMAL: + if (curr_mode == REGULATOR_MODE_FAST) { + ret = regmap_update_bits(rdev->regmap, + MT6315_BUCK_TOP_4PHASE_ANA_CON42, + modeset_mask, + 0); + } else if (curr_mode == REGULATOR_MODE_IDLE) { + ret = regmap_update_bits(rdev->regmap, + MT6315_BUCK_TOP_CON1, + info->lp_mode_mask, + 0); + usleep_range(100, 110); + } else { + ret = -EINVAL; + } + break; + case REGULATOR_MODE_IDLE: + val = MT6315_BUCK_MODE_LP >> 1; + val <<= info->lp_mode_shift; + ret = regmap_update_bits(rdev->regmap, + MT6315_BUCK_TOP_CON1, + info->lp_mode_mask, + val); + break; + default: + ret = -EINVAL; + dev_notice(&rdev->dev, "Unsupported mode: %d\n", mode); + break; + } + + if (ret != 0) { + dev_notice(&rdev->dev, "Failed to set mode: %d\n", ret); + return ret; + } + + return 0; +} + +static int mt6315_get_status(struct regulator_dev *rdev) +{ + const struct mt6315_regulator_info *info; + int ret; + u32 regval; + + info = container_of(rdev->desc, struct mt6315_regulator_info, desc); + ret = regmap_read(rdev->regmap, info->status_reg, ®val); + if (ret < 0) { + dev_notice(&rdev->dev, "Failed to get enable reg: %d\n", ret); + return ret; + } + + return (regval & BIT(0)) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF; +} + +static const struct regulator_ops mt6315_volt_range_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .get_status = mt6315_get_status, + .set_mode = mt6315_regulator_set_mode, + .get_mode = mt6315_regulator_get_mode, +}; + +static const struct mt6315_regulator_info mt6315_regulators[MT6315_VBUCK_MAX] = { + MT_BUCK("vbuck1", MT6315_VBUCK1, MT6315_BUCK_TOP_ELR0), + MT_BUCK("vbuck2", MT6315_VBUCK2, MT6315_BUCK_TOP_ELR2), + MT_BUCK("vbuck3", MT6315_VBUCK3, MT6315_BUCK_TOP_ELR4), + MT_BUCK("vbuck4", MT6315_VBUCK4, MT6315_BUCK_TOP_ELR6), +}; + +static const struct regmap_config mt6315_regmap_config = { + .reg_bits = 16, + .val_bits = 8, + .max_register = 0x16d0, + .fast_io = true, +}; + +static const struct of_device_id mt6315_of_match[] = { + { + .compatible = "mediatek,mt6315-regulator", + }, { + /* sentinel */ + }, +}; +MODULE_DEVICE_TABLE(of, mt6315_of_match); + +static int mt6315_regulator_probe(struct spmi_device *pdev) +{ + struct device *dev = &pdev->dev; + struct regmap *regmap; + struct mt6315_chip *chip; + struct mt_regulator_init_data *init_data; + struct regulator_config config = {}; + struct regulator_dev *rdev; + int i; + + regmap = devm_regmap_init_spmi_ext(pdev, &mt6315_regmap_config); + if (!regmap) + return -ENODEV; + + chip = devm_kzalloc(dev, sizeof(struct mt6315_chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + init_data = devm_kzalloc(dev, sizeof(struct mt_regulator_init_data), GFP_KERNEL); + if (!init_data) + return -ENOMEM; + + switch (pdev->usid) { + case MT6315_PP: + init_data->modeset_mask[MT6315_VBUCK1] = BIT(MT6315_VBUCK1) | BIT(MT6315_VBUCK2) | + BIT(MT6315_VBUCK4); + break; + case MT6315_SP: + case MT6315_RP: + init_data->modeset_mask[MT6315_VBUCK1] = BIT(MT6315_VBUCK1) | BIT(MT6315_VBUCK2); + break; + default: + init_data->modeset_mask[MT6315_VBUCK1] = BIT(MT6315_VBUCK1); + break; + } + for (i = MT6315_VBUCK2; i < MT6315_VBUCK_MAX; i++) + init_data->modeset_mask[i] = BIT(i); + + chip->dev = dev; + chip->regmap = regmap; + dev_set_drvdata(dev, chip); + + config.dev = dev; + config.regmap = regmap; + for (i = MT6315_VBUCK1; i < MT6315_VBUCK_MAX; i++) { + config.driver_data = init_data; + rdev = devm_regulator_register(dev, &mt6315_regulators[i].desc, &config); + if (IS_ERR(rdev)) { + dev_notice(dev, "Failed to register %s\n", mt6315_regulators[i].desc.name); + continue; + } + } + + return 0; +} + +static void mt6315_regulator_shutdown(struct spmi_device *pdev) +{ + struct mt6315_chip *chip = dev_get_drvdata(&pdev->dev); + int ret = 0; + + ret |= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY_H, PROTECTION_KEY_H); + ret |= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY, PROTECTION_KEY); + ret |= regmap_update_bits(chip->regmap, MT6315_TOP2_ELR7, 1, 1); + ret |= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY, 0); + ret |= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY_H, 0); + if (ret < 0) + dev_notice(&pdev->dev, "[%#x] Failed to enable power off sequence. %d\n", + pdev->usid, ret); +} + +static struct spmi_driver mt6315_regulator_driver = { + .driver = { + .name = "mt6315-regulator", + .of_match_table = mt6315_of_match, + }, + .probe = mt6315_regulator_probe, + .shutdown = mt6315_regulator_shutdown, +}; + +module_spmi_driver(mt6315_regulator_driver); + +MODULE_AUTHOR("Hsin-Hsiung Wang "); +MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6315 PMIC"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/regulator/mt6315-regulator.h b/include/linux/regulator/mt6315-regulator.h new file mode 100644 index 000000000000..3b80d3f3910c --- /dev/null +++ b/include/linux/regulator/mt6315-regulator.h @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2021 MediaTek Inc. + */ + +#ifndef __LINUX_REGULATOR_MT6315_H +#define __LINUX_REGULATOR_MT6315_H + +#define MT6315_RP 3 +#define MT6315_PP 6 +#define MT6315_SP 7 + +enum { + MT6315_VBUCK1 = 0, + MT6315_VBUCK2, + MT6315_VBUCK3, + MT6315_VBUCK4, + MT6315_VBUCK_MAX, +}; + +/* Register */ +#define MT6315_TOP2_ELR7 0x139 +#define MT6315_TOP_TMA_KEY 0x39F +#define MT6315_TOP_TMA_KEY_H 0x3A0 +#define MT6315_BUCK_TOP_CON0 0x1440 +#define MT6315_BUCK_TOP_CON1 0x1443 +#define MT6315_BUCK_TOP_ELR0 0x1449 +#define MT6315_BUCK_TOP_ELR2 0x144B +#define MT6315_BUCK_TOP_ELR4 0x144D +#define MT6315_BUCK_TOP_ELR6 0x144F +#define MT6315_VBUCK1_DBG0 0x1499 +#define MT6315_VBUCK1_DBG4 0x149D +#define MT6315_VBUCK2_DBG0 0x1519 +#define MT6315_VBUCK2_DBG4 0x151D +#define MT6315_VBUCK3_DBG0 0x1599 +#define MT6315_VBUCK3_DBG4 0x159D +#define MT6315_VBUCK4_DBG0 0x1619 +#define MT6315_VBUCK4_DBG4 0x161D +#define MT6315_BUCK_TOP_4PHASE_ANA_CON42 0x16B1 + +#define PROTECTION_KEY_H 0x9C +#define PROTECTION_KEY 0xEA + +#endif /* __LINUX_REGULATOR_MT6315_H */