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-rw-r--r--drivers/input/rmi4/Kconfig7
-rw-r--r--drivers/input/rmi4/Makefile1
-rw-r--r--drivers/input/rmi4/rmi_bus.c3
-rw-r--r--drivers/input/rmi4/rmi_driver.h1
-rw-r--r--drivers/input/rmi4/rmi_f1a.c143
5 files changed, 155 insertions, 0 deletions
diff --git a/drivers/input/rmi4/Kconfig b/drivers/input/rmi4/Kconfig
index 1f91d620eadb..5db58fc9e11b 100644
--- a/drivers/input/rmi4/Kconfig
+++ b/drivers/input/rmi4/Kconfig
@@ -82,6 +82,13 @@ config RMI4_F12
touchpads. For sensors that support relative pointing, F12 also
provides mouse input.
+config RMI4_F1A
+ bool "RMI4 Function 1A (0D pointing)"
+ help
+ Say Y here if you want to add support for RMI4 function 1A.
+
+ Function 1A provides capacitive keys support for RMI4 devices.
+
config RMI4_F21
bool "RMI4 Function 21 (PRESSURE)"
help
diff --git a/drivers/input/rmi4/Makefile b/drivers/input/rmi4/Makefile
index 484b97eca025..35ae29f72497 100644
--- a/drivers/input/rmi4/Makefile
+++ b/drivers/input/rmi4/Makefile
@@ -8,6 +8,7 @@ rmi_core-$(CONFIG_RMI4_2D_SENSOR) += rmi_2d_sensor.o
rmi_core-$(CONFIG_RMI4_F03) += rmi_f03.o
rmi_core-$(CONFIG_RMI4_F11) += rmi_f11.o
rmi_core-$(CONFIG_RMI4_F12) += rmi_f12.o
+rmi_core-$(CONFIG_RMI4_F1A) += rmi_f1a.o
rmi_core-$(CONFIG_RMI4_F21) += rmi_f21.o
rmi_core-$(CONFIG_RMI4_F30) += rmi_f30.o
rmi_core-$(CONFIG_RMI4_F34) += rmi_f34.o rmi_f34v7.o
diff --git a/drivers/input/rmi4/rmi_bus.c b/drivers/input/rmi4/rmi_bus.c
index 47fe7a88c92b..5f98c3bcfd46 100644
--- a/drivers/input/rmi4/rmi_bus.c
+++ b/drivers/input/rmi4/rmi_bus.c
@@ -360,6 +360,9 @@ static struct rmi_function_handler *fn_handlers[] = {
#ifdef CONFIG_RMI4_F12
&rmi_f12_handler,
#endif
+#ifdef CONFIG_RMI4_F1A
+ &rmi_f1a_handler,
+#endif
#ifdef CONFIG_RMI4_F21
&rmi_f21_handler,
#endif
diff --git a/drivers/input/rmi4/rmi_driver.h b/drivers/input/rmi4/rmi_driver.h
index 21e1c7663561..e84495caab15 100644
--- a/drivers/input/rmi4/rmi_driver.h
+++ b/drivers/input/rmi4/rmi_driver.h
@@ -133,6 +133,7 @@ extern struct rmi_function_handler rmi_f01_handler;
extern struct rmi_function_handler rmi_f03_handler;
extern struct rmi_function_handler rmi_f11_handler;
extern struct rmi_function_handler rmi_f12_handler;
+extern struct rmi_function_handler rmi_f1a_handler;
extern struct rmi_function_handler rmi_f21_handler;
extern struct rmi_function_handler rmi_f30_handler;
extern struct rmi_function_handler rmi_f34_handler;
diff --git a/drivers/input/rmi4/rmi_f1a.c b/drivers/input/rmi4/rmi_f1a.c
new file mode 100644
index 000000000000..765e9eae4cdc
--- /dev/null
+++ b/drivers/input/rmi4/rmi_f1a.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2025 André Apitzsch <git@apitzsch.eu>
+ */
+
+#include <linux/input.h>
+#include <linux/property.h>
+#include "rmi_driver.h"
+
+struct f1a_data {
+ struct input_dev *input;
+
+ u32 *keymap;
+ unsigned int num_keys;
+};
+
+static int rmi_f1a_parse_device_properties(struct rmi_function *fn, struct f1a_data *f1a)
+{
+ static const char buttons_property[] = "linux,keycodes";
+ struct device *dev = &fn->dev;
+ u32 *buttonmap;
+ int n_keys;
+ int error;
+
+ if (!device_property_present(dev, buttons_property))
+ return 0;
+
+ n_keys = device_property_count_u32(dev, buttons_property);
+ if (n_keys <= 0) {
+ error = n_keys < 0 ? n_keys : -EINVAL;
+ dev_err(dev, "Invalid/malformed '%s' property: %d\n",
+ buttons_property, error);
+ return error;
+ }
+
+ buttonmap = devm_kmalloc_array(dev, n_keys, sizeof(*buttonmap),
+ GFP_KERNEL);
+ if (!buttonmap)
+ return -ENOMEM;
+
+ error = device_property_read_u32_array(dev, buttons_property,
+ buttonmap, n_keys);
+ if (error) {
+ dev_err(dev, "Failed to parse '%s' property: %d\n",
+ buttons_property, error);
+ return error;
+ }
+
+ f1a->keymap = buttonmap;
+ f1a->num_keys = n_keys;
+
+ return 0;
+}
+
+static irqreturn_t rmi_f1a_attention(int irq, void *ctx)
+{
+ struct rmi_function *fn = ctx;
+ struct f1a_data *f1a = dev_get_drvdata(&fn->dev);
+ char button_bitmask;
+ int key;
+ int error;
+
+ error = rmi_read_block(fn->rmi_dev, fn->fd.data_base_addr,
+ &button_bitmask, sizeof(button_bitmask));
+ if (error) {
+ dev_err(&fn->dev, "Failed to read object data. Code: %d.\n",
+ error);
+ return IRQ_RETVAL(error);
+ }
+
+ for (key = 0; key < f1a->num_keys; key++)
+ input_report_key(f1a->input, f1a->keymap[key],
+ button_bitmask & BIT(key));
+
+ return IRQ_HANDLED;
+}
+
+static int rmi_f1a_config(struct rmi_function *fn)
+{
+ struct f1a_data *f1a = dev_get_drvdata(&fn->dev);
+ struct rmi_driver *drv = fn->rmi_dev->driver;
+
+ if (f1a->num_keys)
+ drv->set_irq_bits(fn->rmi_dev, fn->irq_mask);
+
+ return 0;
+}
+
+static int rmi_f1a_initialize(struct rmi_function *fn, struct f1a_data *f1a)
+{
+ int error;
+ int i;
+
+ error = rmi_f1a_parse_device_properties(fn, f1a);
+ if (error)
+ return error;
+
+ for (i = 0; i < f1a->num_keys; i++)
+ input_set_capability(f1a->input, EV_KEY, f1a->keymap[i]);
+
+ f1a->input->keycode = f1a->keymap;
+ f1a->input->keycodemax = f1a->num_keys;
+ f1a->input->keycodesize = sizeof(f1a->keymap[0]);
+
+ return 0;
+}
+
+static int rmi_f1a_probe(struct rmi_function *fn)
+{
+ struct rmi_device *rmi_dev = fn->rmi_dev;
+ struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
+ struct f1a_data *f1a;
+ int error;
+
+ if (!drv_data->input) {
+ dev_info(&fn->dev, "F1A: no input device found, ignoring\n");
+ return -ENXIO;
+ }
+
+ f1a = devm_kzalloc(&fn->dev, sizeof(*f1a), GFP_KERNEL);
+ if (!f1a)
+ return -ENOMEM;
+
+ f1a->input = drv_data->input;
+
+ error = rmi_f1a_initialize(fn, f1a);
+ if (error)
+ return error;
+
+ dev_set_drvdata(&fn->dev, f1a);
+
+ return 0;
+}
+
+struct rmi_function_handler rmi_f1a_handler = {
+ .driver = {
+ .name = "rmi4_f1a",
+ },
+ .func = 0x1a,
+ .probe = rmi_f1a_probe,
+ .config = rmi_f1a_config,
+ .attention = rmi_f1a_attention,
+};