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, 415 insertions, 0 deletions

diff --git a/drivers/input/keyboard/qt2160.c b/drivers/input/keyboard/qt2160.c
new file mode 100644
index 000000000..e64adaca1
--- /dev/null
+++ b/drivers/input/keyboard/qt2160.c
@@ -0,0 +1,415 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  qt2160.c - Atmel AT42QT2160 Touch Sense Controller
+ *
+ *  Copyright (C) 2009 Raphael Derosso Pereira <raphaelpereira@gmail.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+
+#define QT2160_VALID_CHIPID  0x11
+
+#define QT2160_CMD_CHIPID     0
+#define QT2160_CMD_CODEVER    1
+#define QT2160_CMD_GSTAT      2
+#define QT2160_CMD_KEYS3      3
+#define QT2160_CMD_KEYS4      4
+#define QT2160_CMD_SLIDE      5
+#define QT2160_CMD_GPIOS      6
+#define QT2160_CMD_SUBVER     7
+#define QT2160_CMD_CALIBRATE  10
+#define QT2160_CMD_DRIVE_X    70
+#define QT2160_CMD_PWMEN_X    74
+#define QT2160_CMD_PWM_DUTY   76
+
+#define QT2160_NUM_LEDS_X	8
+
+#define QT2160_CYCLE_INTERVAL	2000 /* msec - 2 sec */
+
+static unsigned char qt2160_key2code[] = {
+	KEY_0, KEY_1, KEY_2, KEY_3,
+	KEY_4, KEY_5, KEY_6, KEY_7,
+	KEY_8, KEY_9, KEY_A, KEY_B,
+	KEY_C, KEY_D, KEY_E, KEY_F,
+};
+
+#ifdef CONFIG_LEDS_CLASS
+struct qt2160_led {
+	struct qt2160_data *qt2160;
+	struct led_classdev cdev;
+	char name[32];
+	int id;
+	enum led_brightness brightness;
+};
+#endif
+
+struct qt2160_data {
+	struct i2c_client *client;
+	struct input_dev *input;
+	unsigned short keycodes[ARRAY_SIZE(qt2160_key2code)];
+	u16 key_matrix;
+#ifdef CONFIG_LEDS_CLASS
+	struct qt2160_led leds[QT2160_NUM_LEDS_X];
+#endif
+};
+
+static int qt2160_read(struct i2c_client *client, u8 reg);
+static int qt2160_write(struct i2c_client *client, u8 reg, u8 data);
+
+#ifdef CONFIG_LEDS_CLASS
+
+static int qt2160_led_set(struct led_classdev *cdev,
+			  enum led_brightness value)
+{
+	struct qt2160_led *led = container_of(cdev, struct qt2160_led, cdev);
+	struct qt2160_data *qt2160 = led->qt2160;
+	struct i2c_client *client = qt2160->client;
+	u32 drive, pwmen;
+
+	if (value != led->brightness) {
+		drive = qt2160_read(client, QT2160_CMD_DRIVE_X);
+		pwmen = qt2160_read(client, QT2160_CMD_PWMEN_X);
+		if (value != LED_OFF) {
+			drive |= BIT(led->id);
+			pwmen |= BIT(led->id);
+
+		} else {
+			drive &= ~BIT(led->id);
+			pwmen &= ~BIT(led->id);
+		}
+		qt2160_write(client, QT2160_CMD_DRIVE_X, drive);
+		qt2160_write(client, QT2160_CMD_PWMEN_X, pwmen);
+
+		/*
+		 * Changing this register will change the brightness
+		 * of every LED in the qt2160. It's a HW limitation.
+		 */
+		if (value != LED_OFF)
+			qt2160_write(client, QT2160_CMD_PWM_DUTY, value);
+
+		led->brightness = value;
+	}
+
+	return 0;
+}
+
+#endif /* CONFIG_LEDS_CLASS */
+
+static int qt2160_read_block(struct i2c_client *client,
+			     u8 inireg, u8 *buffer, unsigned int count)
+{
+	int error, idx = 0;
+
+	/*
+	 * Can't use SMBus block data read. Check for I2C functionality to speed
+	 * things up whenever possible. Otherwise we will be forced to read
+	 * sequentially.
+	 */
+	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C))	{
+
+		error = i2c_smbus_write_byte(client, inireg + idx);
+		if (error) {
+			dev_err(&client->dev,
+				"couldn't send request. Returned %d\n", error);
+			return error;
+		}
+
+		error = i2c_master_recv(client, buffer, count);
+		if (error != count) {
+			dev_err(&client->dev,
+				"couldn't read registers. Returned %d bytes\n", error);
+			return error;
+		}
+	} else {
+
+		while (count--) {
+			int data;
+
+			error = i2c_smbus_write_byte(client, inireg + idx);
+			if (error) {
+				dev_err(&client->dev,
+					"couldn't send request. Returned %d\n", error);
+				return error;
+			}
+
+			data = i2c_smbus_read_byte(client);
+			if (data < 0) {
+				dev_err(&client->dev,
+					"couldn't read register. Returned %d\n", data);
+				return data;
+			}
+
+			buffer[idx++] = data;
+		}
+	}
+
+	return 0;
+}
+
+static void qt2160_get_key_matrix(struct input_dev *input)
+{
+	struct qt2160_data *qt2160 = input_get_drvdata(input);
+	struct i2c_client *client = qt2160->client;
+	u8 regs[6];
+	u16 old_matrix, new_matrix;
+	int ret, i, mask;
+
+	dev_dbg(&client->dev, "requesting keys...\n");
+
+	/*
+	 * Read all registers from General Status Register
+	 * to GPIOs register
+	 */
+	ret = qt2160_read_block(client, QT2160_CMD_GSTAT, regs, 6);
+	if (ret) {
+		dev_err(&client->dev,
+			"could not perform chip read.\n");
+		return;
+	}
+
+	old_matrix = qt2160->key_matrix;
+	qt2160->key_matrix = new_matrix = (regs[2] << 8) | regs[1];
+
+	mask = 0x01;
+	for (i = 0; i < 16; ++i, mask <<= 1) {
+		int keyval = new_matrix & mask;
+
+		if ((old_matrix & mask) != keyval) {
+			input_report_key(input, qt2160->keycodes[i], keyval);
+			dev_dbg(&client->dev, "key %d %s\n",
+				i, keyval ? "pressed" : "released");
+		}
+	}
+
+	input_sync(input);
+}
+
+static irqreturn_t qt2160_irq(int irq, void *data)
+{
+	struct input_dev *input = data;
+
+	qt2160_get_key_matrix(input);
+
+	return IRQ_HANDLED;
+}
+
+static int qt2160_read(struct i2c_client *client, u8 reg)
+{
+	int ret;
+
+	ret = i2c_smbus_write_byte(client, reg);
+	if (ret) {
+		dev_err(&client->dev,
+			"couldn't send request. Returned %d\n", ret);
+		return ret;
+	}
+
+	ret = i2c_smbus_read_byte(client);
+	if (ret < 0) {
+		dev_err(&client->dev,
+			"couldn't read register. Returned %d\n", ret);
+		return ret;
+	}
+
+	return ret;
+}
+
+static int qt2160_write(struct i2c_client *client, u8 reg, u8 data)
+{
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(client, reg, data);
+	if (ret < 0)
+		dev_err(&client->dev,
+			"couldn't write data. Returned %d\n", ret);
+
+	return ret;
+}
+
+#ifdef CONFIG_LEDS_CLASS
+
+static int qt2160_register_leds(struct qt2160_data *qt2160)
+{
+	struct i2c_client *client = qt2160->client;
+	int error;
+	int i;
+
+	for (i = 0; i < QT2160_NUM_LEDS_X; i++) {
+		struct qt2160_led *led = &qt2160->leds[i];
+
+		snprintf(led->name, sizeof(led->name), "qt2160:x%d", i);
+		led->cdev.name = led->name;
+		led->cdev.brightness_set_blocking = qt2160_led_set;
+		led->cdev.brightness = LED_OFF;
+		led->id = i;
+		led->qt2160 = qt2160;
+
+		error = devm_led_classdev_register(&client->dev, &led->cdev);
+		if (error)
+			return error;
+	}
+
+	/* Tur off LEDs */
+	qt2160_write(client, QT2160_CMD_DRIVE_X, 0);
+	qt2160_write(client, QT2160_CMD_PWMEN_X, 0);
+	qt2160_write(client, QT2160_CMD_PWM_DUTY, 0);
+
+	return 0;
+}
+
+#else
+
+static inline int qt2160_register_leds(struct qt2160_data *qt2160)
+{
+	return 0;
+}
+
+#endif
+
+static bool qt2160_identify(struct i2c_client *client)
+{
+	int id, ver, rev;
+
+	/* Read Chid ID to check if chip is valid */
+	id = qt2160_read(client, QT2160_CMD_CHIPID);
+	if (id != QT2160_VALID_CHIPID) {
+		dev_err(&client->dev, "ID %d not supported\n", id);
+		return false;
+	}
+
+	/* Read chip firmware version */
+	ver = qt2160_read(client, QT2160_CMD_CODEVER);
+	if (ver < 0) {
+		dev_err(&client->dev, "could not get firmware version\n");
+		return false;
+	}
+
+	/* Read chip firmware revision */
+	rev = qt2160_read(client, QT2160_CMD_SUBVER);
+	if (rev < 0) {
+		dev_err(&client->dev, "could not get firmware revision\n");
+		return false;
+	}
+
+	dev_info(&client->dev, "AT42QT2160 firmware version %d.%d.%d\n",
+			ver >> 4, ver & 0xf, rev);
+
+	return true;
+}
+
+static int qt2160_probe(struct i2c_client *client)
+{
+	struct qt2160_data *qt2160;
+	struct input_dev *input;
+	int i;
+	int error;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE)) {
+		dev_err(&client->dev, "%s adapter not supported\n",
+			dev_driver_string(&client->adapter->dev));
+		return -ENODEV;
+	}
+
+	if (!qt2160_identify(client))
+		return -ENODEV;
+
+	/* Chip is valid and active. Allocate structure */
+	qt2160 = devm_kzalloc(&client->dev, sizeof(*qt2160), GFP_KERNEL);
+	if (!qt2160)
+		return -ENOMEM;
+
+	input = devm_input_allocate_device(&client->dev);
+	if (!input)
+		return -ENOMEM;
+
+	qt2160->client = client;
+	qt2160->input = input;
+
+	input->name = "AT42QT2160 Touch Sense Keyboard";
+	input->id.bustype = BUS_I2C;
+
+	input->keycode = qt2160->keycodes;
+	input->keycodesize = sizeof(qt2160->keycodes[0]);
+	input->keycodemax = ARRAY_SIZE(qt2160_key2code);
+
+	__set_bit(EV_KEY, input->evbit);
+	__clear_bit(EV_REP, input->evbit);
+	for (i = 0; i < ARRAY_SIZE(qt2160_key2code); i++) {
+		qt2160->keycodes[i] = qt2160_key2code[i];
+		__set_bit(qt2160_key2code[i], input->keybit);
+	}
+	__clear_bit(KEY_RESERVED, input->keybit);
+
+	input_set_drvdata(input, qt2160);
+
+	/* Calibrate device */
+	error = qt2160_write(client, QT2160_CMD_CALIBRATE, 1);
+	if (error) {
+		dev_err(&client->dev, "failed to calibrate device\n");
+		return error;
+	}
+
+	if (client->irq) {
+		error = devm_request_threaded_irq(&client->dev, client->irq,
+						  NULL, qt2160_irq,
+						  IRQF_ONESHOT,
+						  "qt2160", input);
+		if (error) {
+			dev_err(&client->dev,
+				"failed to allocate irq %d\n", client->irq);
+			return error;
+		}
+	} else {
+		error = input_setup_polling(input, qt2160_get_key_matrix);
+		if (error) {
+			dev_err(&client->dev, "Failed to setup polling\n");
+			return error;
+		}
+		input_set_poll_interval(input, QT2160_CYCLE_INTERVAL);
+	}
+
+	error = qt2160_register_leds(qt2160);
+	if (error) {
+		dev_err(&client->dev, "Failed to register leds\n");
+		return error;
+	}
+
+	error = input_register_device(qt2160->input);
+	if (error) {
+		dev_err(&client->dev,
+			"Failed to register input device\n");
+		return error;
+	}
+
+	return 0;
+}
+
+static const struct i2c_device_id qt2160_idtable[] = {
+	{ .name = "qt2160" },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(i2c, qt2160_idtable);
+
+static struct i2c_driver qt2160_driver = {
+	.driver = {
+		.name	= "qt2160",
+	},
+
+	.id_table	= qt2160_idtable,
+	.probe		= qt2160_probe,
+};
+
+module_i2c_driver(qt2160_driver);
+
+MODULE_AUTHOR("Raphael Derosso Pereira <raphaelpereira@gmail.com>");
+MODULE_DESCRIPTION("Driver for AT42QT2160 Touch Sensor");
+MODULE_LICENSE("GPL");