Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 312 insertions, 0 deletions

diff --git a/drivers/regulator/rt8092.c b/drivers/regulator/rt8092.c
new file mode 100644
index 000000000..2ea4872ad
--- /dev/null
+++ b/drivers/regulator/rt8092.c
@@ -0,0 +1,312 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright (c) 2025 Richtek Technology Corp.
+//
+// Author: ChiYuan Huang <cy_huang@richtek.com>
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+#define RT8092_REG_MNTRPT	0x00
+#define RT8092_REG_VOUTH	0x10
+#define RT8092_REG_VOUTL	0x11
+#define RT8092_REG_PWMMODE	0x14
+#define RT8092_REG_EVENT	0x18
+#define RT8092_REG_VBANKH	0x1C
+#define RT8092_REG_VBANKL	0x1D
+#define RT8092_REG_VBOUND	0x1E
+
+#define RT8092_TSDEVT_MASK	BIT(7)
+#define RT8092_PGEVT_MASK	BIT(0)
+#define RT8092_VSEL_MASK	GENMASK(6, 0)
+#define RT8092_VOUTEN_MASK	BIT(7)
+#define RT8092_FPWML_MASK	BIT(7)
+#define RT8092_FPWMH_MASK	BIT(6)
+#define RT8092_OCPEVT_MASK	BIT(7)
+#define RT8092_SCPEVT_MASK	BIT(4)
+#define RT8092_VINUVEVT_MASK	BIT(1)
+#define RT8092_VBANK_MASK	GENMASK(1, 0)
+
+#define RT8092_MODE_AUTO	0
+#define RT8092_MODE_FPWM	1
+#define RT8092_VOUT_BASEUV	303125
+#define RT8092_VOUT_STEPUV	3125
+#define RT8092_VOUT_MINSEL	15
+#define RT8092_NUM_VOLTS	128
+#define RT8092_INITSS_US	400
+
+static int rt8092_get_vbank_index(struct regmap *regmap, bool vsel_high, unsigned int *vbank_idx)
+{
+	unsigned int vbank_reg = vsel_high ? RT8092_REG_VBANKH : RT8092_REG_VBANKL;
+	unsigned int index;
+	int ret;
+
+	ret = regmap_read(regmap, vbank_reg, &index);
+	if (ret)
+		return ret;
+
+	*vbank_idx = FIELD_GET(RT8092_VBANK_MASK, index);
+	return 0;
+}
+
+static int rt8092_set_operating_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+	const struct regulator_desc *desc = rdev->desc;
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	unsigned int mode_mask, mode_val;
+
+	mode_mask = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_FPWMH_MASK : RT8092_FPWML_MASK;
+
+	switch (mode) {
+	case REGULATOR_MODE_FAST:
+		mode_val = mode_mask;
+		break;
+	case REGULATOR_MODE_NORMAL:
+		mode_val = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return regmap_update_bits(regmap, RT8092_REG_PWMMODE, mode_mask, mode_val);
+}
+
+static unsigned int rt8092_get_operating_mode(struct regulator_dev *rdev)
+{
+	const struct regulator_desc *desc = rdev->desc;
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	unsigned int mode_mask, mode_val;
+	int ret;
+
+	mode_mask = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_FPWMH_MASK : RT8092_FPWML_MASK;
+
+	ret = regmap_read(regmap, RT8092_REG_PWMMODE, &mode_val);
+	if (ret)
+		return REGULATOR_MODE_INVALID;
+
+	return mode_val & mode_mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;
+}
+
+static int rt8092_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)
+{
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	unsigned int mntrpt, evtrpt, events = 0;
+	int ret;
+
+	ret = regmap_read(regmap, RT8092_REG_MNTRPT, &mntrpt);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(regmap, RT8092_REG_EVENT, &evtrpt);
+	if (ret)
+		return ret;
+
+	if (!(mntrpt & RT8092_PGEVT_MASK) || evtrpt & RT8092_VINUVEVT_MASK)
+		events |= REGULATOR_ERROR_UNDER_VOLTAGE;
+
+	if (mntrpt & RT8092_TSDEVT_MASK)
+		events |= REGULATOR_ERROR_OVER_TEMP;
+
+	if (evtrpt & RT8092_OCPEVT_MASK)
+		events |= REGULATOR_ERROR_OVER_CURRENT;
+
+	if (evtrpt & RT8092_SCPEVT_MASK)
+		events |= REGULATOR_ERROR_FAIL;
+
+	*flags = events;
+	return 0;
+}
+
+
+static int rt8092_set_suspend_voltage(struct regulator_dev *rdev, int uV)
+{
+	const struct regulator_desc *desc = rdev->desc;
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	unsigned int vsel_reg, vsel_val, vbank_idx;
+	bool vsel_high;
+	int ret;
+
+	vsel_reg = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_REG_VOUTL : RT8092_REG_VOUTH;
+	vsel_high = desc->vsel_reg == RT8092_REG_VOUTH;
+
+	ret = rt8092_get_vbank_index(regmap, vsel_high, &vbank_idx);
+	if (ret)
+		return ret;
+
+	/* VOUT  = (BASEUV + STEPUV * VSEL) * 2^vbank_idx */
+	uV >>= vbank_idx;
+	if (uV < RT8092_VOUT_BASEUV)
+		return -EINVAL;
+
+	vsel_val = (uV - RT8092_VOUT_BASEUV) / RT8092_VOUT_STEPUV;
+	if (vsel_val < RT8092_VOUT_MINSEL || vsel_val >= RT8092_NUM_VOLTS)
+		return -EINVAL;
+
+	return regmap_update_bits(regmap, vsel_reg, RT8092_VSEL_MASK, vsel_val);
+}
+
+static int rt8092_set_suspend_enable(struct regulator_dev *rdev)
+{
+	const struct regulator_desc *desc = rdev->desc;
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	unsigned int enable_reg;
+
+	enable_reg = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_REG_VOUTL : RT8092_REG_VOUTH;
+	return regmap_set_bits(regmap, enable_reg, RT8092_VOUTEN_MASK);
+}
+
+static int rt8092_set_suspend_disable(struct regulator_dev *rdev)
+{
+	const struct regulator_desc *desc = rdev->desc;
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	unsigned int enable_reg;
+
+	enable_reg = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_REG_VOUTL : RT8092_REG_VOUTH;
+	return regmap_clear_bits(regmap, enable_reg, RT8092_VOUTEN_MASK);
+}
+
+static int rt8092_set_suspend_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+	const struct regulator_desc *desc = rdev->desc;
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	unsigned int mode_mask, mode_val;
+
+	mode_mask = desc->vsel_reg == RT8092_REG_VOUTH ? RT8092_FPWML_MASK : RT8092_FPWMH_MASK;
+
+	switch (mode) {
+	case REGULATOR_MODE_FAST:
+		mode_val = mode_mask;
+		break;
+	case REGULATOR_MODE_NORMAL:
+		mode_val = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return regmap_update_bits(regmap, RT8092_REG_PWMMODE, mode_mask, mode_val);
+}
+
+static const struct regulator_ops rt8092_regulator_ops = {
+	.list_voltage = regulator_list_voltage_linear,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.set_mode = rt8092_set_operating_mode,
+	.get_mode = rt8092_get_operating_mode,
+	.get_error_flags = rt8092_get_error_flags,
+	.set_suspend_voltage = rt8092_set_suspend_voltage,
+	.set_suspend_enable = rt8092_set_suspend_enable,
+	.set_suspend_disable = rt8092_set_suspend_disable,
+	.set_suspend_mode = rt8092_set_suspend_mode,
+};
+
+static unsigned int rt8092_of_map_mode(unsigned int mode)
+{
+	switch (mode) {
+	case RT8092_MODE_AUTO:
+		return REGULATOR_MODE_NORMAL;
+	case RT8092_MODE_FPWM:
+		return REGULATOR_MODE_FAST;
+	default:
+		return REGULATOR_MODE_INVALID;
+	}
+}
+
+static const struct regmap_config rt8092_regmap_cfg = {
+	.name =	"rt8092",
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = RT8092_REG_VBOUND,
+};
+
+static int rt8092_probe(struct i2c_client *i2c)
+{
+	unsigned int vbank_idx, min_uV, step_uV;
+	struct regulator_config cfg = {};
+	struct device *dev = &i2c->dev;
+	struct regulator_desc *desc;
+	struct regulator_dev *rdev;
+	struct gpio_desc *enable;
+	struct regmap *regmap;
+	bool vsel_high;
+	int ret;
+
+	desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
+	if (!desc)
+		return -ENOMEM;
+
+	enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH);
+	if (IS_ERR(enable))
+		return dev_err_probe(dev, PTR_ERR(enable), "Failed get 'enable' gpio\n");
+
+	regmap = devm_regmap_init_i2c(i2c, &rt8092_regmap_cfg);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
+
+	vsel_high = device_property_read_bool(dev, "richtek,vsel-active-high");
+
+	ret = rt8092_get_vbank_index(regmap, vsel_high, &vbank_idx);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get VOUT bank index\n");
+
+	/*
+	 * step VOUT = STEP_UV * 2^vbank_idx
+	 * min VOUT  = (BASEUV + STEPUV * VMIN_SEL) * 2^vbank_idx
+	 */
+	step_uV = RT8092_VOUT_STEPUV << vbank_idx;
+	min_uV = (RT8092_VOUT_BASEUV + RT8092_VOUT_STEPUV * RT8092_VOUT_MINSEL) << vbank_idx;
+
+	desc->name = "rt8092";
+	desc->owner = THIS_MODULE;
+	desc->type = REGULATOR_VOLTAGE;
+	desc->ops = &rt8092_regulator_ops;
+	desc->n_voltages = RT8092_NUM_VOLTS;
+	desc->min_uV = min_uV;
+	desc->uV_step = step_uV;
+	desc->linear_min_sel = RT8092_VOUT_MINSEL;
+	desc->enable_reg = desc->vsel_reg = vsel_high ? RT8092_REG_VOUTH : RT8092_REG_VOUTL;
+	desc->vsel_mask = RT8092_VSEL_MASK;
+	desc->enable_mask = RT8092_VOUTEN_MASK;
+	desc->enable_time = RT8092_INITSS_US;
+	desc->of_map_mode = rt8092_of_map_mode;
+
+	cfg.dev = dev;
+	cfg.of_node = dev_of_node(dev);
+	cfg.init_data = of_get_regulator_init_data(dev, dev_of_node(dev), desc);
+
+	rdev = devm_regulator_register(dev, desc, &cfg);
+	if (IS_ERR(rdev))
+		return dev_err_probe(dev, PTR_ERR(rdev), "Failed to register regulator\n");
+
+	return 0;
+}
+
+static const struct of_device_id rt8092_device_tables[] = {
+	{ .compatible = "richtek,rt8092" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, rt8092_device_tables);
+
+static struct i2c_driver rt8092_driver = {
+	.driver = {
+		.name = "rt8092",
+		.of_match_table = rt8092_device_tables,
+	},
+	.probe = rt8092_probe,
+};
+module_i2c_driver(rt8092_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("Richtek RT8092 Regulator Driver");
+MODULE_LICENSE("GPL");