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, 325 insertions, 0 deletions

diff --git a/drivers/input/misc/palmas-pwrbutton.c b/drivers/input/misc/palmas-pwrbutton.c
new file mode 100644
index 000000000..f22083f44
--- /dev/null
+++ b/drivers/input/misc/palmas-pwrbutton.c
@@ -0,0 +1,325 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Texas Instruments' Palmas Power Button Input Driver
+ *
+ * Copyright (C) 2012-2014 Texas Instruments Incorporated - http://www.ti.com/
+ *	Girish S Ghongdemath
+ *	Nishanth Menon
+ */
+
+#include <linux/bitfield.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/palmas.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#define PALMAS_LPK_TIME_MASK		0x0c
+#define PALMAS_PWRON_DEBOUNCE_MASK	0x03
+#define PALMAS_PWR_KEY_Q_TIME_MS	20
+
+/**
+ * struct palmas_pwron - Palmas power on data
+ * @palmas:		pointer to palmas device
+ * @input_dev:		pointer to input device
+ * @input_work:		work for detecting release of key
+ * @irq:		irq that we are hooked on to
+ */
+struct palmas_pwron {
+	struct palmas *palmas;
+	struct input_dev *input_dev;
+	struct delayed_work input_work;
+	int irq;
+};
+
+/**
+ * struct palmas_pwron_config - configuration of palmas power on
+ * @long_press_time_val:	value for long press h/w shutdown event
+ * @pwron_debounce_val:		value for debounce of power button
+ */
+struct palmas_pwron_config {
+	u8 long_press_time_val;
+	u8 pwron_debounce_val;
+};
+
+/**
+ * palmas_power_button_work() - Detects the button release event
+ * @work:	work item to detect button release
+ */
+static void palmas_power_button_work(struct work_struct *work)
+{
+	struct palmas_pwron *pwron = container_of(work,
+						  struct palmas_pwron,
+						  input_work.work);
+	struct input_dev *input_dev = pwron->input_dev;
+	unsigned int reg;
+	int error;
+
+	error = palmas_read(pwron->palmas, PALMAS_INTERRUPT_BASE,
+			    PALMAS_INT1_LINE_STATE, &reg);
+	if (error) {
+		dev_err(input_dev->dev.parent,
+			"Cannot read palmas PWRON status: %d\n", error);
+	} else if (reg & BIT(1)) {
+		/* The button is released, report event. */
+		input_report_key(input_dev, KEY_POWER, 0);
+		input_sync(input_dev);
+	} else {
+		/* The button is still depressed, keep checking. */
+		schedule_delayed_work(&pwron->input_work,
+				msecs_to_jiffies(PALMAS_PWR_KEY_Q_TIME_MS));
+	}
+}
+
+/**
+ * pwron_irq() - button press isr
+ * @irq:		irq
+ * @palmas_pwron:	pwron struct
+ *
+ * Return: IRQ_HANDLED
+ */
+static irqreturn_t pwron_irq(int irq, void *palmas_pwron)
+{
+	struct palmas_pwron *pwron = palmas_pwron;
+	struct input_dev *input_dev = pwron->input_dev;
+
+	input_report_key(input_dev, KEY_POWER, 1);
+	pm_wakeup_event(input_dev->dev.parent, 0);
+	input_sync(input_dev);
+
+	mod_delayed_work(system_dfl_wq, &pwron->input_work,
+			 msecs_to_jiffies(PALMAS_PWR_KEY_Q_TIME_MS));
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * palmas_pwron_params_ofinit() - device tree parameter parser
+ * @dev:	palmas button device
+ * @config:	configuration params that this fills up
+ */
+static void palmas_pwron_params_ofinit(struct device *dev,
+				       struct palmas_pwron_config *config)
+{
+	struct device_node *np;
+	u32 val;
+	int i, error;
+	static const u8 lpk_times[] = { 6, 8, 10, 12 };
+	static const int pwr_on_deb_ms[] = { 15, 100, 500, 1000 };
+
+	memset(config, 0, sizeof(*config));
+
+	/* Default config parameters */
+	config->long_press_time_val = ARRAY_SIZE(lpk_times) - 1;
+
+	np = dev->of_node;
+	if (!np)
+		return;
+
+	error = of_property_read_u32(np, "ti,palmas-long-press-seconds", &val);
+	if (!error) {
+		for (i = 0; i < ARRAY_SIZE(lpk_times); i++) {
+			if (val <= lpk_times[i]) {
+				config->long_press_time_val = i;
+				break;
+			}
+		}
+	}
+
+	error = of_property_read_u32(np,
+				     "ti,palmas-pwron-debounce-milli-seconds",
+				     &val);
+	if (!error) {
+		for (i = 0; i < ARRAY_SIZE(pwr_on_deb_ms); i++) {
+			if (val <= pwr_on_deb_ms[i]) {
+				config->pwron_debounce_val = i;
+				break;
+			}
+		}
+	}
+
+	dev_info(dev, "h/w controlled shutdown duration=%d seconds\n",
+		 lpk_times[config->long_press_time_val]);
+}
+
+/**
+ * palmas_pwron_probe() - probe
+ * @pdev:	platform device for the button
+ *
+ * Return: 0 for successful probe else appropriate error
+ */
+static int palmas_pwron_probe(struct platform_device *pdev)
+{
+	struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
+	struct device *dev = &pdev->dev;
+	struct input_dev *input_dev;
+	struct palmas_pwron *pwron;
+	struct palmas_pwron_config config;
+	int val;
+	int error;
+
+	palmas_pwron_params_ofinit(dev, &config);
+
+	pwron = kzalloc_obj(*pwron);
+	if (!pwron)
+		return -ENOMEM;
+
+	input_dev = input_allocate_device();
+	if (!input_dev) {
+		dev_err(dev, "Can't allocate power button\n");
+		error = -ENOMEM;
+		goto err_free_mem;
+	}
+
+	input_dev->name = "palmas_pwron";
+	input_dev->phys = "palmas_pwron/input0";
+	input_dev->dev.parent = dev;
+
+	input_set_capability(input_dev, EV_KEY, KEY_POWER);
+
+	/*
+	 * Setup default hardware shutdown option (long key press)
+	 * and debounce.
+	 */
+	val = FIELD_PREP(PALMAS_LPK_TIME_MASK, config.long_press_time_val) |
+	      FIELD_PREP(PALMAS_PWRON_DEBOUNCE_MASK, config.pwron_debounce_val);
+	error = palmas_update_bits(palmas, PALMAS_PMU_CONTROL_BASE,
+				   PALMAS_LONG_PRESS_KEY,
+				   PALMAS_LPK_TIME_MASK |
+					PALMAS_PWRON_DEBOUNCE_MASK,
+				   val);
+	if (error) {
+		dev_err(dev, "LONG_PRESS_KEY_UPDATE failed: %d\n", error);
+		goto err_free_input;
+	}
+
+	pwron->palmas = palmas;
+	pwron->input_dev = input_dev;
+
+	INIT_DELAYED_WORK(&pwron->input_work, palmas_power_button_work);
+
+	pwron->irq = platform_get_irq(pdev, 0);
+	if (pwron->irq < 0) {
+		error = pwron->irq;
+		goto err_free_input;
+	}
+
+	error = request_threaded_irq(pwron->irq, NULL, pwron_irq,
+				     IRQF_TRIGGER_HIGH |
+					IRQF_TRIGGER_LOW |
+					IRQF_ONESHOT,
+				     dev_name(dev), pwron);
+	if (error) {
+		dev_err(dev, "Can't get IRQ for pwron: %d\n", error);
+		goto err_free_input;
+	}
+
+	error = input_register_device(input_dev);
+	if (error) {
+		dev_err(dev, "Can't register power button: %d\n", error);
+		goto err_free_irq;
+	}
+
+	platform_set_drvdata(pdev, pwron);
+	device_init_wakeup(dev, true);
+
+	return 0;
+
+err_free_irq:
+	cancel_delayed_work_sync(&pwron->input_work);
+	free_irq(pwron->irq, pwron);
+err_free_input:
+	input_free_device(input_dev);
+err_free_mem:
+	kfree(pwron);
+	return error;
+}
+
+/**
+ * palmas_pwron_remove() - Cleanup on removal
+ * @pdev:	platform device for the button
+ *
+ * Return: 0
+ */
+static void palmas_pwron_remove(struct platform_device *pdev)
+{
+	struct palmas_pwron *pwron = platform_get_drvdata(pdev);
+
+	free_irq(pwron->irq, pwron);
+	cancel_delayed_work_sync(&pwron->input_work);
+
+	input_unregister_device(pwron->input_dev);
+	kfree(pwron);
+}
+
+/**
+ * palmas_pwron_suspend() - suspend handler
+ * @dev:	power button device
+ *
+ * Cancel all pending work items for the power button, setup irq for wakeup
+ *
+ * Return: 0
+ */
+static int palmas_pwron_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct palmas_pwron *pwron = platform_get_drvdata(pdev);
+
+	cancel_delayed_work_sync(&pwron->input_work);
+
+	if (device_may_wakeup(dev))
+		enable_irq_wake(pwron->irq);
+
+	return 0;
+}
+
+/**
+ * palmas_pwron_resume() - resume handler
+ * @dev:	power button device
+ *
+ * Just disable the wakeup capability of irq here.
+ *
+ * Return: 0
+ */
+static int palmas_pwron_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct palmas_pwron *pwron = platform_get_drvdata(pdev);
+
+	if (device_may_wakeup(dev))
+		disable_irq_wake(pwron->irq);
+
+	return 0;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(palmas_pwron_pm,
+				palmas_pwron_suspend, palmas_pwron_resume);
+
+#ifdef CONFIG_OF
+static const struct of_device_id of_palmas_pwr_match[] = {
+	{ .compatible = "ti,palmas-pwrbutton" },
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, of_palmas_pwr_match);
+#endif
+
+static struct platform_driver palmas_pwron_driver = {
+	.probe	= palmas_pwron_probe,
+	.remove	= palmas_pwron_remove,
+	.driver	= {
+		.name	= "palmas_pwrbutton",
+		.of_match_table = of_match_ptr(of_palmas_pwr_match),
+		.pm	= pm_sleep_ptr(&palmas_pwron_pm),
+	},
+};
+module_platform_driver(palmas_pwron_driver);
+
+MODULE_ALIAS("platform:palmas-pwrbutton");
+MODULE_DESCRIPTION("Palmas Power Button");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Texas Instruments Inc.");