13 files changed, 370 insertions, 29 deletions

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index a18ab7358d8f..9f088900f863 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -730,6 +730,24 @@ config INPUT_ADXL34X_SPI
 	  To compile this driver as a module, choose M here: the
 	  module will be called adxl34x-spi.
 
+config INPUT_IBM_PANEL
+	tristate "IBM Operation Panel driver"
+	depends on I2C && I2C_SLAVE
+	help
+	  Say Y here if you have an IBM Operation Panel connected to your system
+	  over I2C. The panel is typically connected only to a system's service
+	  processor (BMC).
+
+	  If unsure, say N.
+
+	  The Operation Panel is a controller with some buttons and an LCD
+	  display that allows someone with physical access to the system to
+	  perform various administrative tasks. This driver only supports the part
+	  of the controller that sends commands to the system.
+
+	  To compile this driver as a module, choose M here: the module will be
+	  called ibm-panel.
+
 config INPUT_IMS_PCU
 	tristate "IMS Passenger Control Unit driver"
 	depends on USB
@@ -891,6 +909,15 @@ config INPUT_SC27XX_VIBRA
 	  To compile this driver as a module, choose M here. The module will
 	  be called sc27xx_vibra.
 
+config INPUT_RT5120_PWRKEY
+	tristate "RT5120 PMIC power key support"
+	depends on MFD_RT5120 || COMPILE_TEST
+	help
+	  This enables support for RT5120 PMIC power key driver.
+
+	  To compile this driver as a module, choose M here. the module will
+	  be called rt5120-pwrkey.
+
 config INPUT_STPMIC1_ONKEY
 	tristate "STPMIC1 PMIC Onkey support"
 	depends on MFD_STPMIC1
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 28dfc444f0a9..6abefc41037b 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -41,6 +41,7 @@ obj-$(CONFIG_INPUT_GPIO_DECODER)	+= gpio_decoder.o
 obj-$(CONFIG_INPUT_GPIO_VIBRA)		+= gpio-vibra.o
 obj-$(CONFIG_INPUT_HISI_POWERKEY)	+= hisi_powerkey.o
 obj-$(CONFIG_HP_SDC_RTC)		+= hp_sdc_rtc.o
+obj-$(CONFIG_INPUT_IBM_PANEL)		+= ibm-panel.o
 obj-$(CONFIG_INPUT_IMS_PCU)		+= ims-pcu.o
 obj-$(CONFIG_INPUT_IQS269A)		+= iqs269a.o
 obj-$(CONFIG_INPUT_IQS626A)		+= iqs626a.o
@@ -69,6 +70,7 @@ obj-$(CONFIG_INPUT_RAVE_SP_PWRBUTTON)	+= rave-sp-pwrbutton.o
 obj-$(CONFIG_INPUT_RB532_BUTTON)	+= rb532_button.o
 obj-$(CONFIG_INPUT_REGULATOR_HAPTIC)	+= regulator-haptic.o
 obj-$(CONFIG_INPUT_RETU_PWRBUTTON)	+= retu-pwrbutton.o
+obj-$(CONFIG_INPUT_RT5120_PWRKEY)	+= rt5120-pwrkey.o
 obj-$(CONFIG_INPUT_AXP20X_PEK)		+= axp20x-pek.o
 obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER)	+= rotary_encoder.o
 obj-$(CONFIG_INPUT_RK805_PWRKEY)	+= rk805-pwrkey.o
diff --git a/drivers/input/misc/adxl34x-i2c.c b/drivers/input/misc/adxl34x-i2c.c
index a3b5f88d2bd1..5be636aaa94f 100644
--- a/drivers/input/misc/adxl34x-i2c.c
+++ b/drivers/input/misc/adxl34x-i2c.c
@@ -99,13 +99,11 @@ static int adxl34x_i2c_probe(struct i2c_client *client,
 	return 0;
 }
 
-static int adxl34x_i2c_remove(struct i2c_client *client)
+static void adxl34x_i2c_remove(struct i2c_client *client)
 {
 	struct adxl34x *ac = i2c_get_clientdata(client);
 
 	adxl34x_remove(ac);
-
-	return 0;
 }
 
 static int __maybe_unused adxl34x_i2c_suspend(struct device *dev)
diff --git a/drivers/input/misc/bma150.c b/drivers/input/misc/bma150.c
index a9d984da95f3..84fe394da7a6 100644
--- a/drivers/input/misc/bma150.c
+++ b/drivers/input/misc/bma150.c
@@ -513,11 +513,9 @@ static int bma150_probe(struct i2c_client *client,
 	return 0;
 }
 
-static int bma150_remove(struct i2c_client *client)
+static void bma150_remove(struct i2c_client *client)
 {
 	pm_runtime_disable(&client->dev);
-
-	return 0;
 }
 
 static int __maybe_unused bma150_suspend(struct device *dev)
diff --git a/drivers/input/misc/cma3000_d0x_i2c.c b/drivers/input/misc/cma3000_d0x_i2c.c
index 03fb49127c3a..3b23210c46b7 100644
--- a/drivers/input/misc/cma3000_d0x_i2c.c
+++ b/drivers/input/misc/cma3000_d0x_i2c.c
@@ -58,13 +58,11 @@ static int cma3000_i2c_probe(struct i2c_client *client,
 	return 0;
 }
 
-static int cma3000_i2c_remove(struct i2c_client *client)
+static void cma3000_i2c_remove(struct i2c_client *client)
 {
 	struct cma3000_accl_data *data = i2c_get_clientdata(client);
 
 	cma3000_exit(data);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/input/misc/ibm-panel.c b/drivers/input/misc/ibm-panel.c
new file mode 100644
index 000000000000..a8fba0054719
--- /dev/null
+++ b/drivers/input/misc/ibm-panel.c
@@ -0,0 +1,200 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) IBM Corporation 2020
+ */
+
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/kernel.h>
+#include <linux/limits.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/spinlock.h>
+
+#define DEVICE_NAME		"ibm-panel"
+#define PANEL_KEYCODES_COUNT	3
+
+struct ibm_panel {
+	u8 idx;
+	u8 command[11];
+	u32 keycodes[PANEL_KEYCODES_COUNT];
+	spinlock_t lock;	/* protects writes to idx and command */
+	struct input_dev *input;
+};
+
+static u8 ibm_panel_calculate_checksum(struct ibm_panel *panel)
+{
+	u8 chksum;
+	u16 sum = 0;
+	unsigned int i;
+
+	for (i = 0; i < sizeof(panel->command) - 1; ++i) {
+		sum += panel->command[i];
+		if (sum & 0xff00) {
+			sum &= 0xff;
+			sum++;
+		}
+	}
+
+	chksum = sum & 0xff;
+	chksum = ~chksum;
+	chksum++;
+
+	return chksum;
+}
+
+static void ibm_panel_process_command(struct ibm_panel *panel)
+{
+	u8 button;
+	u8 chksum;
+
+	if (panel->command[0] != 0xff && panel->command[1] != 0xf0) {
+		dev_dbg(&panel->input->dev, "command invalid: %02x %02x\n",
+			panel->command[0], panel->command[1]);
+		return;
+	}
+
+	chksum = ibm_panel_calculate_checksum(panel);
+	if (chksum != panel->command[sizeof(panel->command) - 1]) {
+		dev_dbg(&panel->input->dev,
+			"command failed checksum: %u != %u\n", chksum,
+			panel->command[sizeof(panel->command) - 1]);
+		return;
+	}
+
+	button = panel->command[2] & 0xf;
+	if (button < PANEL_KEYCODES_COUNT) {
+		input_report_key(panel->input, panel->keycodes[button],
+				 !(panel->command[2] & 0x80));
+		input_sync(panel->input);
+	} else {
+		dev_dbg(&panel->input->dev, "unknown button %u\n",
+			button);
+	}
+}
+
+static int ibm_panel_i2c_slave_cb(struct i2c_client *client,
+				  enum i2c_slave_event event, u8 *val)
+{
+	unsigned long flags;
+	struct ibm_panel *panel = i2c_get_clientdata(client);
+
+	dev_dbg(&panel->input->dev, "event: %u data: %02x\n", event, *val);
+
+	spin_lock_irqsave(&panel->lock, flags);
+
+	switch (event) {
+	case I2C_SLAVE_STOP:
+		if (panel->idx == sizeof(panel->command))
+			ibm_panel_process_command(panel);
+		else
+			dev_dbg(&panel->input->dev,
+				"command incorrect size %u\n", panel->idx);
+		fallthrough;
+	case I2C_SLAVE_WRITE_REQUESTED:
+		panel->idx = 0;
+		break;
+	case I2C_SLAVE_WRITE_RECEIVED:
+		if (panel->idx < sizeof(panel->command))
+			panel->command[panel->idx++] = *val;
+		else
+			/*
+			 * The command is too long and therefore invalid, so set the index
+			 * to it's largest possible value. When a STOP is finally received,
+			 * the command will be rejected upon processing.
+			 */
+			panel->idx = U8_MAX;
+		break;
+	case I2C_SLAVE_READ_REQUESTED:
+	case I2C_SLAVE_READ_PROCESSED:
+		*val = 0xff;
+		break;
+	default:
+		break;
+	}
+
+	spin_unlock_irqrestore(&panel->lock, flags);
+
+	return 0;
+}
+
+static int ibm_panel_probe(struct i2c_client *client,
+			   const struct i2c_device_id *id)
+{
+	struct ibm_panel *panel;
+	int i;
+	int error;
+
+	panel = devm_kzalloc(&client->dev, sizeof(*panel), GFP_KERNEL);
+	if (!panel)
+		return -ENOMEM;
+
+	spin_lock_init(&panel->lock);
+
+	panel->input = devm_input_allocate_device(&client->dev);
+	if (!panel->input)
+		return -ENOMEM;
+
+	panel->input->name = client->name;
+	panel->input->id.bustype = BUS_I2C;
+
+	error = device_property_read_u32_array(&client->dev,
+					       "linux,keycodes",
+					       panel->keycodes,
+					       PANEL_KEYCODES_COUNT);
+	if (error) {
+		/*
+		 * Use gamepad buttons as defaults for compatibility with
+		 * existing applications.
+		 */
+		panel->keycodes[0] = BTN_NORTH;
+		panel->keycodes[1] = BTN_SOUTH;
+		panel->keycodes[2] = BTN_SELECT;
+	}
+
+	for (i = 0; i < PANEL_KEYCODES_COUNT; ++i)
+		input_set_capability(panel->input, EV_KEY, panel->keycodes[i]);
+
+	error = input_register_device(panel->input);
+	if (error) {
+		dev_err(&client->dev,
+			"Failed to register input device: %d\n", error);
+		return error;
+	}
+
+	i2c_set_clientdata(client, panel);
+	error = i2c_slave_register(client, ibm_panel_i2c_slave_cb);
+	if (error) {
+		dev_err(&client->dev,
+			"Failed to register as i2c slave: %d\n", error);
+		return error;
+	}
+
+	return 0;
+}
+
+static void ibm_panel_remove(struct i2c_client *client)
+{
+	i2c_slave_unregister(client);
+}
+
+static const struct of_device_id ibm_panel_match[] = {
+	{ .compatible = "ibm,op-panel" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ibm_panel_match);
+
+static struct i2c_driver ibm_panel_driver = {
+	.driver = {
+		.name = DEVICE_NAME,
+		.of_match_table = ibm_panel_match,
+	},
+	.probe = ibm_panel_probe,
+	.remove = ibm_panel_remove,
+};
+module_i2c_driver(ibm_panel_driver);
+
+MODULE_AUTHOR("Eddie James <eajames@linux.ibm.com>");
+MODULE_DESCRIPTION("IBM Operation Panel Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/misc/ims-pcu.c b/drivers/input/misc/ims-pcu.c
index 6f38aa23a1ff..b2f1292e27ef 100644
--- a/drivers/input/misc/ims-pcu.c
+++ b/drivers/input/misc/ims-pcu.c
@@ -744,7 +744,7 @@ static int ims_pcu_switch_to_bootloader(struct ims_pcu *pcu)
 	error = ims_pcu_execute_command(pcu, JUMP_TO_BTLDR, NULL, 0);
 	if (error) {
 		dev_err(pcu->dev,
-			"Failure when sending JUMP TO BOOLTLOADER command, error: %d\n",
+			"Failure when sending JUMP TO BOOTLOADER command, error: %d\n",
 			error);
 		return error;
 	}
diff --git a/drivers/input/misc/iqs7222.c b/drivers/input/misc/iqs7222.c
index b2e8097a2e6d..ddb863bf63ee 100644
--- a/drivers/input/misc/iqs7222.c
+++ b/drivers/input/misc/iqs7222.c
@@ -1077,7 +1077,7 @@ static int iqs7222_hard_reset(struct iqs7222_private *iqs7222)
 
 static int iqs7222_force_comms(struct iqs7222_private *iqs7222)
 {
-	u8 msg_buf[] = { 0xFF, 0x00, };
+	u8 msg_buf[] = { 0xFF, };
 	int ret;
 
 	/*
@@ -1771,11 +1771,9 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222, int chan_index)
 	if (!chan_node)
 		return 0;
 
-	if (dev_desc->allow_offset) {
-		sys_setup[dev_desc->allow_offset] |= BIT(chan_index);
-		if (fwnode_property_present(chan_node, "azoteq,ulp-allow"))
-			sys_setup[dev_desc->allow_offset] &= ~BIT(chan_index);
-	}
+	if (dev_desc->allow_offset &&
+	    fwnode_property_present(chan_node, "azoteq,ulp-allow"))
+		sys_setup[dev_desc->allow_offset] &= ~BIT(chan_index);
 
 	chan_setup[0] |= IQS7222_CHAN_SETUP_0_CHAN_EN;
 
@@ -2206,6 +2204,9 @@ static int iqs7222_parse_all(struct iqs7222_private *iqs7222)
 	u16 *sys_setup = iqs7222->sys_setup;
 	int error, i;
 
+	if (dev_desc->allow_offset)
+		sys_setup[dev_desc->allow_offset] = U16_MAX;
+
 	if (dev_desc->event_offset)
 		sys_setup[dev_desc->event_offset] = IQS7222_EVENT_MASK_ATI;
 
@@ -2326,6 +2327,9 @@ static int iqs7222_report(struct iqs7222_private *iqs7222)
 			int k = 2 + j * (num_chan > 16 ? 2 : 1);
 			u16 state = le16_to_cpu(status[k + i / 16]);
 
+			if (!iqs7222->kp_type[i][j])
+				continue;
+
 			input_event(iqs7222->keypad,
 				    iqs7222->kp_type[i][j],
 				    iqs7222->kp_code[i][j],
diff --git a/drivers/input/misc/keyspan_remote.c b/drivers/input/misc/keyspan_remote.c
index 4650f4a94989..bee4b1376491 100644
--- a/drivers/input/misc/keyspan_remote.c
+++ b/drivers/input/misc/keyspan_remote.c
@@ -485,7 +485,7 @@ static int keyspan_probe(struct usb_interface *interface, const struct usb_devic
 	}
 
 	if (udev->manufacturer)
-		strlcpy(remote->name, udev->manufacturer, sizeof(remote->name));
+		strscpy(remote->name, udev->manufacturer, sizeof(remote->name));
 
 	if (udev->product) {
 		if (udev->manufacturer)
diff --git a/drivers/input/misc/pcf8574_keypad.c b/drivers/input/misc/pcf8574_keypad.c
index abc423165522..cfd6640e4f82 100644
--- a/drivers/input/misc/pcf8574_keypad.c
+++ b/drivers/input/misc/pcf8574_keypad.c
@@ -157,7 +157,7 @@ static int pcf8574_kp_probe(struct i2c_client *client, const struct i2c_device_i
 	return ret;
 }
 
-static int pcf8574_kp_remove(struct i2c_client *client)
+static void pcf8574_kp_remove(struct i2c_client *client)
 {
 	struct kp_data *lp = i2c_get_clientdata(client);
 
@@ -165,8 +165,6 @@ static int pcf8574_kp_remove(struct i2c_client *client)
 
 	input_unregister_device(lp->idev);
 	kfree(lp);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/input/misc/rt5120-pwrkey.c b/drivers/input/misc/rt5120-pwrkey.c
new file mode 100644
index 000000000000..8a8c1aeeed05
--- /dev/null
+++ b/drivers/input/misc/rt5120-pwrkey.c
@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ * Author: ChiYuan Huang <cy_huang@richtek.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define RT5120_REG_INTSTAT	0x1E
+#define RT5120_PWRKEYSTAT_MASK	BIT(7)
+
+struct rt5120_priv {
+	struct regmap *regmap;
+	struct input_dev *input;
+};
+
+static irqreturn_t rt5120_pwrkey_handler(int irq, void *devid)
+{
+	struct rt5120_priv *priv = devid;
+	unsigned int stat;
+	int error;
+
+	error = regmap_read(priv->regmap, RT5120_REG_INTSTAT, &stat);
+	if (error)
+		return IRQ_NONE;
+
+	input_report_key(priv->input, KEY_POWER,
+			 !(stat & RT5120_PWRKEYSTAT_MASK));
+	input_sync(priv->input);
+
+	return IRQ_HANDLED;
+}
+
+static int rt5120_pwrkey_probe(struct platform_device *pdev)
+{
+	struct rt5120_priv *priv;
+	struct device *dev = &pdev->dev;
+	int press_irq, release_irq;
+	int error;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->regmap = dev_get_regmap(dev->parent, NULL);
+	if (!priv->regmap) {
+		dev_err(dev, "Failed to init regmap\n");
+		return -ENODEV;
+	}
+
+	press_irq = platform_get_irq_byname(pdev, "pwrkey-press");
+	if (press_irq < 0)
+		return press_irq;
+
+	release_irq = platform_get_irq_byname(pdev, "pwrkey-release");
+	if (release_irq < 0)
+		return release_irq;
+
+	/* Make input device be device resource managed */
+	priv->input = devm_input_allocate_device(dev);
+	if (!priv->input)
+		return -ENOMEM;
+
+	priv->input->name = "rt5120_pwrkey";
+	priv->input->phys = "rt5120_pwrkey/input0";
+	priv->input->id.bustype = BUS_I2C;
+	input_set_capability(priv->input, EV_KEY, KEY_POWER);
+
+	error = input_register_device(priv->input);
+	if (error) {
+		dev_err(dev, "Failed to register input device: %d\n", error);
+		return error;
+	}
+
+	error = devm_request_threaded_irq(dev, press_irq,
+					  NULL, rt5120_pwrkey_handler,
+					  0, "pwrkey-press", priv);
+	if (error) {
+		dev_err(dev,
+			"Failed to register pwrkey press irq: %d\n", error);
+		return error;
+	}
+
+	error = devm_request_threaded_irq(dev, release_irq,
+					  NULL, rt5120_pwrkey_handler,
+					  0, "pwrkey-release", priv);
+	if (error) {
+		dev_err(dev,
+			"Failed to register pwrkey release irq: %d\n", error);
+		return error;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id r5120_pwrkey_match_table[] = {
+	{ .compatible = "richtek,rt5120-pwrkey" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, r5120_pwrkey_match_table);
+
+static struct platform_driver rt5120_pwrkey_driver = {
+	.driver = {
+		.name = "rt5120-pwrkey",
+		.of_match_table = r5120_pwrkey_match_table,
+	},
+	.probe = rt5120_pwrkey_probe,
+};
+module_platform_driver(rt5120_pwrkey_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("Richtek RT5120 power key driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/misc/twl4030-pwrbutton.c b/drivers/input/misc/twl4030-pwrbutton.c
index b307cca17022..e3ee0638ffba 100644
--- a/drivers/input/misc/twl4030-pwrbutton.c
+++ b/drivers/input/misc/twl4030-pwrbutton.c
@@ -26,6 +26,7 @@
 #include <linux/errno.h>
 #include <linux/input.h>
 #include <linux/interrupt.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/twl.h>
 
diff --git a/drivers/input/misc/twl4030-vibra.c b/drivers/input/misc/twl4030-vibra.c
index e0ff616fb857..5619996da86f 100644
--- a/drivers/input/misc/twl4030-vibra.c
+++ b/drivers/input/misc/twl4030-vibra.c
@@ -163,14 +163,10 @@ static int __maybe_unused twl4030_vibra_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops,
 			 twl4030_vibra_suspend, twl4030_vibra_resume);
 
-static bool twl4030_vibra_check_coexist(struct twl4030_vibra_data *pdata,
-			      struct device_node *parent)
+static bool twl4030_vibra_check_coexist(struct device_node *parent)
 {
 	struct device_node *node;
 
-	if (pdata && pdata->coexist)
-		return true;
-
 	node = of_get_child_by_name(parent, "codec");
 	if (node) {
 		of_node_put(node);
@@ -182,13 +178,12 @@ static bool twl4030_vibra_check_coexist(struct twl4030_vibra_data *pdata,
 
 static int twl4030_vibra_probe(struct platform_device *pdev)
 {
-	struct twl4030_vibra_data *pdata = dev_get_platdata(&pdev->dev);
 	struct device_node *twl4030_core_node = pdev->dev.parent->of_node;
 	struct vibra_info *info;
 	int ret;
 
-	if (!pdata && !twl4030_core_node) {
-		dev_dbg(&pdev->dev, "platform_data not available\n");
+	if (!twl4030_core_node) {
+		dev_dbg(&pdev->dev, "twl4030 OF node is missing\n");
 		return -EINVAL;
 	}
 
@@ -197,7 +192,7 @@ static int twl4030_vibra_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	info->dev = &pdev->dev;
-	info->coexist = twl4030_vibra_check_coexist(pdata, twl4030_core_node);
+	info->coexist = twl4030_vibra_check_coexist(twl4030_core_node);
 	INIT_WORK(&info->play_work, vibra_play_work);
 
 	info->input_dev = devm_input_allocate_device(&pdev->dev);