forked from Minki/linux
regulator: qcom: Add labibb driver
Qualcomm platforms have LAB(LCD AMOLED Boost)/IBB(Inverting Buck Boost) regulators, labibb for short, which are used as power supply for LCD Mode displays. This patch adds labibb regulator driver for pmi8998 PMIC, found on SDM845 platforms. [sumits: reworked the driver design as per upstream review] Signed-off-by: Nisha Kumari <nishakumari@codeaurora.org> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> Link: https://lore.kernel.org/r/20200622124110.20971-5-sumit.semwal@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Nisha Kumari
Mark Brown
parent
f7d7ad42a9
commit
498ab2fdf8
@ -1223,5 +1223,15 @@ config REGULATOR_WM8994
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This driver provides support for the voltage regulators on the
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WM8994 CODEC.
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config REGULATOR_QCOM_LABIBB
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tristate "QCOM LAB/IBB regulator support"
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depends on SPMI || COMPILE_TEST
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help
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This driver supports Qualcomm's LAB/IBB regulators present on the
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Qualcomm's PMIC chip pmi8998. QCOM LAB and IBB are SPMI
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based PMIC implementations. LAB can be used as positive
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boost regulator and IBB can be used as a negative boost regulator
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for LCD display panel.
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endif
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@ -90,6 +90,7 @@ obj-$(CONFIG_REGULATOR_MT6323) += mt6323-regulator.o
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obj-$(CONFIG_REGULATOR_MT6358) += mt6358-regulator.o
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obj-$(CONFIG_REGULATOR_MT6380) += mt6380-regulator.o
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obj-$(CONFIG_REGULATOR_MT6397) += mt6397-regulator.o
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obj-$(CONFIG_REGULATOR_QCOM_LABIBB) += qcom-labibb-regulator.o
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obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o
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obj-$(CONFIG_REGULATOR_QCOM_RPMH) += qcom-rpmh-regulator.o
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obj-$(CONFIG_REGULATOR_QCOM_SMD_RPM) += qcom_smd-regulator.o
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175
drivers/regulator/qcom-labibb-regulator.c
Normal file
175
drivers/regulator/qcom-labibb-regulator.c
Normal file
@ -0,0 +1,175 @@
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// SPDX-License-Identifier: GPL-2.0-only
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// Copyright (c) 2020, The Linux Foundation. All rights reserved.
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#include <linux/module.h>
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#include <linux/of_irq.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/of_regulator.h>
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#define REG_PERPH_TYPE 0x04
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#define QCOM_LAB_TYPE 0x24
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#define QCOM_IBB_TYPE 0x20
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#define PMI8998_LAB_REG_BASE 0xde00
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#define PMI8998_IBB_REG_BASE 0xdc00
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#define REG_LABIBB_STATUS1 0x08
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#define REG_LABIBB_ENABLE_CTL 0x46
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#define LABIBB_STATUS1_VREG_OK_BIT BIT(7)
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#define LABIBB_CONTROL_ENABLE BIT(7)
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#define LAB_ENABLE_CTL_MASK BIT(7)
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#define IBB_ENABLE_CTL_MASK (BIT(7) | BIT(6))
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#define LABIBB_OFF_ON_DELAY 1000
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#define LAB_ENABLE_TIME (LABIBB_OFF_ON_DELAY * 2)
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#define IBB_ENABLE_TIME (LABIBB_OFF_ON_DELAY * 10)
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#define LABIBB_POLL_ENABLED_TIME 1000
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struct labibb_regulator {
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struct regulator_desc desc;
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struct device *dev;
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struct regmap *regmap;
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struct regulator_dev *rdev;
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u16 base;
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u8 type;
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};
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struct labibb_regulator_data {
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const char *name;
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u8 type;
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u16 base;
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struct regulator_desc *desc;
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};
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static struct regulator_ops qcom_labibb_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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static struct regulator_desc pmi8998_lab_desc = {
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.enable_mask = LAB_ENABLE_CTL_MASK,
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.enable_reg = (PMI8998_LAB_REG_BASE + REG_LABIBB_ENABLE_CTL),
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.enable_val = LABIBB_CONTROL_ENABLE,
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.enable_time = LAB_ENABLE_TIME,
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.poll_enabled_time = LABIBB_POLL_ENABLED_TIME,
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.off_on_delay = LABIBB_OFF_ON_DELAY,
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.owner = THIS_MODULE,
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.type = REGULATOR_VOLTAGE,
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.ops = &qcom_labibb_ops,
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};
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static struct regulator_desc pmi8998_ibb_desc = {
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.enable_mask = IBB_ENABLE_CTL_MASK,
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.enable_reg = (PMI8998_IBB_REG_BASE + REG_LABIBB_ENABLE_CTL),
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.enable_val = LABIBB_CONTROL_ENABLE,
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.enable_time = IBB_ENABLE_TIME,
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.poll_enabled_time = LABIBB_POLL_ENABLED_TIME,
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.off_on_delay = LABIBB_OFF_ON_DELAY,
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.owner = THIS_MODULE,
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.type = REGULATOR_VOLTAGE,
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.ops = &qcom_labibb_ops,
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};
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static const struct labibb_regulator_data pmi8998_labibb_data[] = {
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{"lab", QCOM_LAB_TYPE, PMI8998_LAB_REG_BASE, &pmi8998_lab_desc},
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{"ibb", QCOM_IBB_TYPE, PMI8998_IBB_REG_BASE, &pmi8998_ibb_desc},
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{ },
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};
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static const struct of_device_id qcom_labibb_match[] = {
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{ .compatible = "qcom,pmi8998-lab-ibb", .data = &pmi8998_labibb_data},
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{ },
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};
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MODULE_DEVICE_TABLE(of, qcom_labibb_match);
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static int qcom_labibb_regulator_probe(struct platform_device *pdev)
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{
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struct labibb_regulator *vreg;
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struct device *dev = &pdev->dev;
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struct regulator_config cfg = {};
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const struct of_device_id *match;
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const struct labibb_regulator_data *reg_data;
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struct regmap *reg_regmap;
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unsigned int type;
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int ret;
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reg_regmap = dev_get_regmap(pdev->dev.parent, NULL);
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if (!reg_regmap) {
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dev_err(&pdev->dev, "Couldn't get parent's regmap\n");
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return -ENODEV;
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}
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match = of_match_device(qcom_labibb_match, &pdev->dev);
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if (!match)
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return -ENODEV;
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for (reg_data = match->data; reg_data->name; reg_data++) {
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/* Validate if the type of regulator is indeed
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* what's mentioned in DT.
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*/
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ret = regmap_read(reg_regmap, reg_data->base + REG_PERPH_TYPE,
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&type);
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if (ret < 0) {
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dev_err(dev,
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"Peripheral type read failed ret=%d\n",
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ret);
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return -EINVAL;
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}
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if (WARN_ON((type != QCOM_LAB_TYPE) && (type != QCOM_IBB_TYPE)) ||
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WARN_ON(type != reg_data->type))
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return -EINVAL;
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vreg = devm_kzalloc(&pdev->dev, sizeof(*vreg),
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GFP_KERNEL);
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if (!vreg)
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return -ENOMEM;
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vreg->regmap = reg_regmap;
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vreg->dev = dev;
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vreg->base = reg_data->base;
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vreg->type = reg_data->type;
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memcpy(&vreg->desc, reg_data->desc, sizeof(vreg->desc));
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vreg->desc.of_match = reg_data->name;
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vreg->desc.name = reg_data->name;
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cfg.dev = vreg->dev;
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cfg.driver_data = vreg;
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cfg.regmap = vreg->regmap;
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vreg->rdev = devm_regulator_register(vreg->dev, &vreg->desc,
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&cfg);
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if (IS_ERR(vreg->rdev)) {
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dev_err(dev, "qcom_labibb: error registering %s : %d\n",
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reg_data->name, ret);
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return PTR_ERR(vreg->rdev);
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}
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}
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return 0;
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}
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static struct platform_driver qcom_labibb_regulator_driver = {
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.driver = {
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.name = "qcom-lab-ibb-regulator",
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.of_match_table = qcom_labibb_match,
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},
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.probe = qcom_labibb_regulator_probe,
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};
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module_platform_driver(qcom_labibb_regulator_driver);
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MODULE_DESCRIPTION("Qualcomm labibb driver");
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MODULE_AUTHOR("Nisha Kumari <nishakumari@codeaurora.org>");
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MODULE_AUTHOR("Sumit Semwal <sumit.semwal@linaro.org>");
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MODULE_LICENSE("GPL v2");
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