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, 465 insertions, 0 deletions

diff --git a/drivers/regulator/lp8755.c b/drivers/regulator/lp8755.c
new file mode 100644
index 000000000..632320ba1
--- /dev/null
+++ b/drivers/regulator/lp8755.c
@@ -0,0 +1,465 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * LP8755 High Performance Power Management Unit : System Interface Driver
+ * (based on rev. 0.26)
+ * Copyright 2012 Texas Instruments
+ *
+ * Author: Daniel(Geon Si) Jeong <daniel.jeong@ti.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/regmap.h>
+#include <linux/uaccess.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/platform_data/lp8755.h>
+
+#define LP8755_REG_BUCK0	0x00
+#define LP8755_REG_BUCK1	0x03
+#define LP8755_REG_BUCK2	0x04
+#define LP8755_REG_BUCK3	0x01
+#define LP8755_REG_BUCK4	0x05
+#define LP8755_REG_BUCK5	0x02
+#define LP8755_REG_MAX		0xFF
+
+#define LP8755_BUCK_EN_M	BIT(7)
+#define LP8755_BUCK_LINEAR_OUT_MAX	0x76
+#define LP8755_BUCK_VOUT_M	0x7F
+
+struct lp8755_mphase {
+	int nreg;
+	int buck_num[LP8755_BUCK_MAX];
+};
+
+struct lp8755_chip {
+	struct device *dev;
+	struct regmap *regmap;
+	struct lp8755_platform_data *pdata;
+
+	int irq;
+	unsigned int irqmask;
+
+	int mphase;
+	struct regulator_dev *rdev[LP8755_BUCK_MAX];
+};
+
+static int lp8755_buck_enable_time(struct regulator_dev *rdev)
+{
+	int ret;
+	unsigned int regval;
+	enum lp8755_bucks id = rdev_get_id(rdev);
+
+	ret = regmap_read(rdev->regmap, 0x12 + id, &regval);
+	if (ret < 0) {
+		dev_err(&rdev->dev, "i2c access error %s\n", __func__);
+		return ret;
+	}
+	return (regval & 0xff) * 100;
+}
+
+static int lp8755_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+	int ret;
+	unsigned int regbval = 0x0;
+	enum lp8755_bucks id = rdev_get_id(rdev);
+	struct lp8755_chip *pchip = rdev_get_drvdata(rdev);
+
+	switch (mode) {
+	case REGULATOR_MODE_FAST:
+		/* forced pwm mode */
+		regbval = (0x01 << id);
+		break;
+	case REGULATOR_MODE_NORMAL:
+		/* enable automatic pwm/pfm mode */
+		ret = regmap_update_bits(rdev->regmap, 0x08 + id, 0x20, 0x00);
+		if (ret < 0)
+			goto err_i2c;
+		break;
+	case REGULATOR_MODE_IDLE:
+		/* enable automatic pwm/pfm/lppfm mode */
+		ret = regmap_update_bits(rdev->regmap, 0x08 + id, 0x20, 0x20);
+		if (ret < 0)
+			goto err_i2c;
+
+		ret = regmap_update_bits(rdev->regmap, 0x10, 0x01, 0x01);
+		if (ret < 0)
+			goto err_i2c;
+		break;
+	default:
+		dev_err(pchip->dev, "Not supported buck mode %s\n", __func__);
+		/* forced pwm mode */
+		regbval = (0x01 << id);
+	}
+
+	ret = regmap_update_bits(rdev->regmap, 0x06, 0x01 << id, regbval);
+	if (ret < 0)
+		goto err_i2c;
+	return ret;
+err_i2c:
+	dev_err(&rdev->dev, "i2c access error %s\n", __func__);
+	return ret;
+}
+
+static unsigned int lp8755_buck_get_mode(struct regulator_dev *rdev)
+{
+	int ret;
+	unsigned int regval;
+	enum lp8755_bucks id = rdev_get_id(rdev);
+
+	ret = regmap_read(rdev->regmap, 0x06, &regval);
+	if (ret < 0)
+		goto err_i2c;
+
+	/* mode fast means forced pwm mode */
+	if (regval & (0x01 << id))
+		return REGULATOR_MODE_FAST;
+
+	ret = regmap_read(rdev->regmap, 0x08 + id, &regval);
+	if (ret < 0)
+		goto err_i2c;
+
+	/* mode idle means automatic pwm/pfm/lppfm mode */
+	if (regval & 0x20)
+		return REGULATOR_MODE_IDLE;
+
+	/* mode normal means automatic pwm/pfm mode */
+	return REGULATOR_MODE_NORMAL;
+
+err_i2c:
+	dev_err(&rdev->dev, "i2c access error %s\n", __func__);
+	return 0;
+}
+
+static const unsigned int lp8755_buck_ramp_table[] = {
+	30000, 15000, 7500, 3800, 1900, 940, 470, 230
+};
+
+static const struct regulator_ops lp8755_buck_ops = {
+	.map_voltage = regulator_map_voltage_linear,
+	.list_voltage = regulator_list_voltage_linear,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable_time = lp8755_buck_enable_time,
+	.set_mode = lp8755_buck_set_mode,
+	.get_mode = lp8755_buck_get_mode,
+	.set_ramp_delay = regulator_set_ramp_delay_regmap,
+};
+
+#define lp8755_rail(_id) "lp8755_buck"#_id
+#define lp8755_buck_init(_id)\
+{\
+	.constraints = {\
+		.name = lp8755_rail(_id),\
+		.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,\
+		.min_uV = 500000,\
+		.max_uV = 1675000,\
+	},\
+}
+
+static struct regulator_init_data lp8755_reg_default[LP8755_BUCK_MAX] = {
+	[LP8755_BUCK0] = lp8755_buck_init(0),
+	[LP8755_BUCK1] = lp8755_buck_init(1),
+	[LP8755_BUCK2] = lp8755_buck_init(2),
+	[LP8755_BUCK3] = lp8755_buck_init(3),
+	[LP8755_BUCK4] = lp8755_buck_init(4),
+	[LP8755_BUCK5] = lp8755_buck_init(5),
+};
+
+static const struct lp8755_mphase mphase_buck[MPHASE_CONF_MAX] = {
+	{ 3, { LP8755_BUCK0, LP8755_BUCK3, LP8755_BUCK5 } },
+	{ 6, { LP8755_BUCK0, LP8755_BUCK1, LP8755_BUCK2, LP8755_BUCK3,
+	       LP8755_BUCK4, LP8755_BUCK5 } },
+	{ 5, { LP8755_BUCK0, LP8755_BUCK2, LP8755_BUCK3, LP8755_BUCK4,
+	       LP8755_BUCK5} },
+	{ 4, { LP8755_BUCK0, LP8755_BUCK3, LP8755_BUCK4, LP8755_BUCK5} },
+	{ 3, { LP8755_BUCK0, LP8755_BUCK4, LP8755_BUCK5} },
+	{ 2, { LP8755_BUCK0, LP8755_BUCK5} },
+	{ 1, { LP8755_BUCK0} },
+	{ 2, { LP8755_BUCK0, LP8755_BUCK3} },
+	{ 4, { LP8755_BUCK0, LP8755_BUCK2, LP8755_BUCK3, LP8755_BUCK5} },
+};
+
+static int lp8755_init_data(struct lp8755_chip *pchip)
+{
+	unsigned int regval;
+	int ret, icnt, buck_num;
+	struct lp8755_platform_data *pdata = pchip->pdata;
+
+	/* read back  muti-phase configuration */
+	ret = regmap_read(pchip->regmap, 0x3D, &regval);
+	if (ret < 0)
+		goto out_i2c_error;
+	pchip->mphase = regval & 0x0F;
+
+	/* set default data based on multi-phase config */
+	for (icnt = 0; icnt < mphase_buck[pchip->mphase].nreg; icnt++) {
+		buck_num = mphase_buck[pchip->mphase].buck_num[icnt];
+		pdata->buck_data[buck_num] = &lp8755_reg_default[buck_num];
+	}
+	return ret;
+
+out_i2c_error:
+	dev_err(pchip->dev, "i2c access error %s\n", __func__);
+	return ret;
+}
+
+#define lp8755_buck_desc(_id)\
+{\
+	.name = lp8755_rail(_id),\
+	.id   = LP8755_BUCK##_id,\
+	.ops  = &lp8755_buck_ops,\
+	.n_voltages = LP8755_BUCK_LINEAR_OUT_MAX+1,\
+	.uV_step = 10000,\
+	.min_uV = 500000,\
+	.type = REGULATOR_VOLTAGE,\
+	.owner = THIS_MODULE,\
+	.enable_reg = LP8755_REG_BUCK##_id,\
+	.enable_mask = LP8755_BUCK_EN_M,\
+	.vsel_reg = LP8755_REG_BUCK##_id,\
+	.vsel_mask = LP8755_BUCK_VOUT_M,\
+	.ramp_reg = (LP8755_BUCK##_id) + 0x7,\
+	.ramp_mask = 0x7,\
+	.ramp_delay_table = lp8755_buck_ramp_table,\
+	.n_ramp_values = ARRAY_SIZE(lp8755_buck_ramp_table),\
+}
+
+static const struct regulator_desc lp8755_regulators[] = {
+	lp8755_buck_desc(0),
+	lp8755_buck_desc(1),
+	lp8755_buck_desc(2),
+	lp8755_buck_desc(3),
+	lp8755_buck_desc(4),
+	lp8755_buck_desc(5),
+};
+
+static int lp8755_regulator_init(struct lp8755_chip *pchip)
+{
+	int ret, icnt, buck_num;
+	struct lp8755_platform_data *pdata = pchip->pdata;
+	struct regulator_config rconfig = { };
+
+	rconfig.regmap = pchip->regmap;
+	rconfig.dev = pchip->dev;
+	rconfig.driver_data = pchip;
+
+	for (icnt = 0; icnt < mphase_buck[pchip->mphase].nreg; icnt++) {
+		buck_num = mphase_buck[pchip->mphase].buck_num[icnt];
+		rconfig.init_data = pdata->buck_data[buck_num];
+		rconfig.of_node = pchip->dev->of_node;
+		pchip->rdev[buck_num] =
+		    devm_regulator_register(pchip->dev,
+				    &lp8755_regulators[buck_num], &rconfig);
+		if (IS_ERR(pchip->rdev[buck_num])) {
+			ret = PTR_ERR(pchip->rdev[buck_num]);
+			pchip->rdev[buck_num] = NULL;
+			dev_err(pchip->dev, "regulator init failed: buck %d\n",
+				buck_num);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static irqreturn_t lp8755_irq_handler(int irq, void *data)
+{
+	int ret, icnt;
+	unsigned int flag0, flag1;
+	struct lp8755_chip *pchip = data;
+
+	/* read flag0 register */
+	ret = regmap_read(pchip->regmap, 0x0D, &flag0);
+	if (ret < 0)
+		goto err_i2c;
+	/* clear flag register to pull up int. pin */
+	ret = regmap_write(pchip->regmap, 0x0D, 0x00);
+	if (ret < 0)
+		goto err_i2c;
+
+	/* sent power fault detection event to specific regulator */
+	for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
+		if ((flag0 & (0x4 << icnt))
+		    && (pchip->irqmask & (0x04 << icnt))
+		    && (pchip->rdev[icnt] != NULL)) {
+			regulator_notifier_call_chain(pchip->rdev[icnt],
+						      LP8755_EVENT_PWR_FAULT,
+						      NULL);
+		}
+
+	/* read flag1 register */
+	ret = regmap_read(pchip->regmap, 0x0E, &flag1);
+	if (ret < 0)
+		goto err_i2c;
+	/* clear flag register to pull up int. pin */
+	ret = regmap_write(pchip->regmap, 0x0E, 0x00);
+	if (ret < 0)
+		goto err_i2c;
+
+	/* send OCP event to all regulator devices */
+	if ((flag1 & 0x01) && (pchip->irqmask & 0x01))
+		for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
+			if (pchip->rdev[icnt] != NULL) {
+				regulator_notifier_call_chain(pchip->rdev[icnt],
+							      LP8755_EVENT_OCP,
+							      NULL);
+			}
+
+	/* send OVP event to all regulator devices */
+	if ((flag1 & 0x02) && (pchip->irqmask & 0x02))
+		for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
+			if (pchip->rdev[icnt] != NULL) {
+				regulator_notifier_call_chain(pchip->rdev[icnt],
+							      LP8755_EVENT_OVP,
+							      NULL);
+			}
+	return IRQ_HANDLED;
+
+err_i2c:
+	dev_err(pchip->dev, "i2c access error %s\n", __func__);
+	return IRQ_NONE;
+}
+
+static int lp8755_int_config(struct lp8755_chip *pchip)
+{
+	int ret;
+	unsigned int regval;
+
+	if (pchip->irq == 0) {
+		dev_warn(pchip->dev, "not use interrupt : %s\n", __func__);
+		return 0;
+	}
+
+	ret = regmap_read(pchip->regmap, 0x0F, &regval);
+	if (ret < 0) {
+		dev_err(pchip->dev, "i2c access error %s\n", __func__);
+		return ret;
+	}
+
+	pchip->irqmask = regval;
+	return devm_request_threaded_irq(pchip->dev, pchip->irq, NULL,
+					 lp8755_irq_handler,
+					 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+					 "lp8755-irq", pchip);
+}
+
+static const struct regmap_config lp8755_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = LP8755_REG_MAX,
+};
+
+static int lp8755_probe(struct i2c_client *client)
+{
+	int ret, icnt;
+	struct lp8755_chip *pchip;
+	struct lp8755_platform_data *pdata = dev_get_platdata(&client->dev);
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		dev_err(&client->dev, "i2c functionality check fail.\n");
+		return -EOPNOTSUPP;
+	}
+
+	pchip = devm_kzalloc(&client->dev,
+			     sizeof(struct lp8755_chip), GFP_KERNEL);
+	if (!pchip)
+		return -ENOMEM;
+
+	pchip->dev = &client->dev;
+	pchip->regmap = devm_regmap_init_i2c(client, &lp8755_regmap);
+	if (IS_ERR(pchip->regmap)) {
+		ret = PTR_ERR(pchip->regmap);
+		dev_err(&client->dev, "fail to allocate regmap %d\n", ret);
+		return ret;
+	}
+	i2c_set_clientdata(client, pchip);
+
+	if (pdata != NULL) {
+		pchip->pdata = pdata;
+		pchip->mphase = pdata->mphase;
+	} else {
+		pchip->pdata = devm_kzalloc(pchip->dev,
+					    sizeof(struct lp8755_platform_data),
+					    GFP_KERNEL);
+		if (!pchip->pdata)
+			return -ENOMEM;
+		ret = lp8755_init_data(pchip);
+		if (ret < 0) {
+			dev_err(&client->dev, "fail to initialize chip\n");
+			return ret;
+		}
+	}
+
+	ret = lp8755_regulator_init(pchip);
+	if (ret < 0) {
+		dev_err(&client->dev, "fail to initialize regulators\n");
+		goto err;
+	}
+
+	pchip->irq = client->irq;
+	ret = lp8755_int_config(pchip);
+	if (ret < 0) {
+		dev_err(&client->dev, "fail to irq config\n");
+		goto err;
+	}
+
+	return ret;
+
+err:
+	/* output disable */
+	for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
+		regmap_write(pchip->regmap, icnt, 0x00);
+
+	return ret;
+}
+
+static void lp8755_remove(struct i2c_client *client)
+{
+	int icnt;
+	struct lp8755_chip *pchip = i2c_get_clientdata(client);
+
+	for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
+		regmap_write(pchip->regmap, icnt, 0x00);
+}
+
+static const struct i2c_device_id lp8755_id[] = {
+	{ .name = LP8755_NAME },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(i2c, lp8755_id);
+
+static struct i2c_driver lp8755_i2c_driver = {
+	.driver = {
+		   .name = LP8755_NAME,
+		   .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+		   },
+	.probe = lp8755_probe,
+	.remove = lp8755_remove,
+	.id_table = lp8755_id,
+};
+
+static int __init lp8755_init(void)
+{
+	return i2c_add_driver(&lp8755_i2c_driver);
+}
+
+subsys_initcall(lp8755_init);
+
+static void __exit lp8755_exit(void)
+{
+	i2c_del_driver(&lp8755_i2c_driver);
+}
+
+module_exit(lp8755_exit);
+
+MODULE_DESCRIPTION("Texas Instruments lp8755 driver");
+MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>");
+MODULE_LICENSE("GPL v2");