From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- drivers/mfd/max77705.c | 180 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 180 insertions(+) create mode 100644 drivers/mfd/max77705.c (limited to 'drivers/mfd/max77705.c') diff --git a/drivers/mfd/max77705.c b/drivers/mfd/max77705.c new file mode 100644 index 000000000..e98c76d6b --- /dev/null +++ b/drivers/mfd/max77705.c @@ -0,0 +1,180 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Maxim MAX77705 PMIC core driver + * + * Copyright (C) 2025 Dzmitry Sankouski + **/ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static struct mfd_cell max77705_devs[] = { + MFD_CELL_OF("max77705-rgb", NULL, NULL, 0, 0, "maxim,max77705-rgb"), + MFD_CELL_OF("max77705-charger", NULL, NULL, 0, 0, "maxim,max77705-charger"), + MFD_CELL_OF("max77705-haptic", NULL, NULL, 0, 0, "maxim,max77705-haptic"), +}; + +static const struct regmap_range max77705_readable_ranges[] = { + regmap_reg_range(MAX77705_PMIC_REG_PMICID1, MAX77705_PMIC_REG_BSTOUT_MASK), + regmap_reg_range(MAX77705_PMIC_REG_INTSRC, MAX77705_PMIC_REG_RESERVED_29), + regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL1, MAX77705_PMIC_REG_BOOSTCONTROL1), + regmap_reg_range(MAX77705_PMIC_REG_MCONFIG, MAX77705_PMIC_REG_MCONFIG2), + regmap_reg_range(MAX77705_PMIC_REG_FORCE_EN_MASK, MAX77705_PMIC_REG_FORCE_EN_MASK), + regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL1, MAX77705_PMIC_REG_BOOSTCONTROL1), + regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL2, MAX77705_PMIC_REG_BOOSTCONTROL2), + regmap_reg_range(MAX77705_PMIC_REG_SW_RESET, MAX77705_PMIC_REG_USBC_RESET), +}; + +static const struct regmap_range max77705_writable_ranges[] = { + regmap_reg_range(MAX77705_PMIC_REG_MAINCTRL1, MAX77705_PMIC_REG_BSTOUT_MASK), + regmap_reg_range(MAX77705_PMIC_REG_INTSRC, MAX77705_PMIC_REG_RESERVED_29), + regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL1, MAX77705_PMIC_REG_BOOSTCONTROL1), + regmap_reg_range(MAX77705_PMIC_REG_MCONFIG, MAX77705_PMIC_REG_MCONFIG2), + regmap_reg_range(MAX77705_PMIC_REG_FORCE_EN_MASK, MAX77705_PMIC_REG_FORCE_EN_MASK), + regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL1, MAX77705_PMIC_REG_BOOSTCONTROL1), + regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL2, MAX77705_PMIC_REG_BOOSTCONTROL2), + regmap_reg_range(MAX77705_PMIC_REG_SW_RESET, MAX77705_PMIC_REG_USBC_RESET), +}; + +static const struct regmap_access_table max77705_readable_table = { + .yes_ranges = max77705_readable_ranges, + .n_yes_ranges = ARRAY_SIZE(max77705_readable_ranges), +}; + +static const struct regmap_access_table max77705_writable_table = { + .yes_ranges = max77705_writable_ranges, + .n_yes_ranges = ARRAY_SIZE(max77705_writable_ranges), +}; + +static const struct regmap_config max77705_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .rd_table = &max77705_readable_table, + .wr_table = &max77705_writable_table, + .max_register = MAX77705_PMIC_REG_USBC_RESET, +}; + +static const struct regmap_irq max77705_irqs[] = { + { .mask = MAX77705_SRC_IRQ_CHG, }, + { .mask = MAX77705_SRC_IRQ_TOP, }, + { .mask = MAX77705_SRC_IRQ_FG, }, + { .mask = MAX77705_SRC_IRQ_USBC, }, +}; + +static const struct regmap_irq_chip max77705_irq_chip = { + .name = "max77705", + .status_base = MAX77705_PMIC_REG_INTSRC, + .ack_base = MAX77705_PMIC_REG_INTSRC, + .mask_base = MAX77705_PMIC_REG_INTSRC_MASK, + .num_regs = 1, + .irqs = max77705_irqs, + .num_irqs = ARRAY_SIZE(max77705_irqs), +}; + +static int max77705_i2c_probe(struct i2c_client *i2c) +{ + struct device *dev = &i2c->dev; + struct max77693_dev *max77705; + struct regmap_irq_chip_data *irq_data; + struct irq_domain *domain; + enum max77705_hw_rev pmic_rev; + unsigned int pmic_rev_value; + int ret; + + max77705 = devm_kzalloc(dev, sizeof(*max77705), GFP_KERNEL); + if (!max77705) + return -ENOMEM; + + max77705->i2c = i2c; + max77705->type = TYPE_MAX77705; + i2c_set_clientdata(i2c, max77705); + + max77705->regmap = devm_regmap_init_i2c(i2c, &max77705_regmap_config); + if (IS_ERR(max77705->regmap)) + return PTR_ERR(max77705->regmap); + + ret = regmap_read(max77705->regmap, MAX77705_PMIC_REG_PMICREV, &pmic_rev_value); + if (ret < 0) + return -ENODEV; + + pmic_rev = pmic_rev_value & MAX77705_REVISION_MASK; + if (pmic_rev != MAX77705_PASS3) + return dev_err_probe(dev, -ENODEV, "Rev.0x%x is not tested\n", pmic_rev); + + /* Active Discharge Enable */ + regmap_update_bits(max77705->regmap, MAX77705_PMIC_REG_MAINCTRL1, 1, 1); + + ret = devm_regmap_add_irq_chip(dev, max77705->regmap, + i2c->irq, + IRQF_ONESHOT, 0, + &max77705_irq_chip, + &irq_data); + if (ret) + return dev_err_probe(dev, ret, "Failed to add IRQ chip\n"); + + domain = regmap_irq_get_domain(irq_data); + + ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, + max77705_devs, ARRAY_SIZE(max77705_devs), + NULL, 0, domain); + if (ret) + return dev_err_probe(dev, ret, "Failed to register child devices\n"); + + ret = devm_device_init_wakeup(dev); + if (ret) + return dev_err_probe(dev, ret, "Failed to init wakeup\n"); + + return 0; +} + +static int max77705_suspend(struct device *dev) +{ + struct i2c_client *i2c = to_i2c_client(dev); + + disable_irq(i2c->irq); + + if (device_may_wakeup(dev)) + enable_irq_wake(i2c->irq); + + return 0; +} + +static int max77705_resume(struct device *dev) +{ + struct i2c_client *i2c = to_i2c_client(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(i2c->irq); + + enable_irq(i2c->irq); + + return 0; +} +static DEFINE_SIMPLE_DEV_PM_OPS(max77705_pm_ops, max77705_suspend, max77705_resume); + +static const struct of_device_id max77705_i2c_of_match[] = { + { .compatible = "maxim,max77705" }, + { } +}; +MODULE_DEVICE_TABLE(of, max77705_i2c_of_match); + +static struct i2c_driver max77705_i2c_driver = { + .driver = { + .name = "max77705", + .of_match_table = max77705_i2c_of_match, + .pm = pm_sleep_ptr(&max77705_pm_ops), + }, + .probe = max77705_i2c_probe +}; +module_i2c_driver(max77705_i2c_driver); + +MODULE_DESCRIPTION("Maxim MAX77705 PMIC core driver"); +MODULE_AUTHOR("Dzmitry Sankouski "); +MODULE_LICENSE("GPL"); -- cgit v1.3.1