From: André Apitzsch <[email protected]> RMI4 F1A implements capacitive keys. Add support for touch keys found in some Synaptics touch controller configurations.
Signed-off-by: André Apitzsch <[email protected]> --- drivers/input/rmi4/Kconfig | 7 ++ drivers/input/rmi4/Makefile | 1 + drivers/input/rmi4/rmi_bus.c | 3 + drivers/input/rmi4/rmi_driver.h | 1 + drivers/input/rmi4/rmi_f1a.c | 145 ++++++++++++++++++++++++++++++++++++++++ 5 files changed, 157 insertions(+) diff --git a/drivers/input/rmi4/Kconfig b/drivers/input/rmi4/Kconfig index c0163b983ce698ff241eeb6303d0e29989e0fcb8..c5d18abd28c7c26a9491656608d65fae50e818a8 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_F30 bool "RMI4 Function 30 (GPIO LED)" help diff --git a/drivers/input/rmi4/Makefile b/drivers/input/rmi4/Makefile index 02f14c84686189b45d6adbbc06e266f64efaa036..70f942196aa2efeeaa7bfd292bcc1b8445761011 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_F30) += rmi_f30.o rmi_core-$(CONFIG_RMI4_F34) += rmi_f34.o rmi_f34v7.o rmi_core-$(CONFIG_RMI4_F3A) += rmi_f3a.o diff --git a/drivers/input/rmi4/rmi_bus.c b/drivers/input/rmi4/rmi_bus.c index 3aee0483720533050c60014d843418740cf04a2d..e04fd6e525dcf474d948380d493249251f83a864 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_F30 &rmi_f30_handler, #endif diff --git a/drivers/input/rmi4/rmi_driver.h b/drivers/input/rmi4/rmi_driver.h index 3bfe9013043ef3dff46249095a5b3116c8f7d9a6..aefe04008509b4363aa1aaf59d9119d95383e942 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_f30_handler; extern struct rmi_function_handler rmi_f34_handler; extern struct rmi_function_handler rmi_f3a_handler; diff --git a/drivers/input/rmi4/rmi_f1a.c b/drivers/input/rmi4/rmi_f1a.c new file mode 100644 index 0000000000000000000000000000000000000000..107f52dd9e1468c2b7c0400bb24f5b0cf2928714 --- /dev/null +++ b/drivers/input/rmi4/rmi_f1a.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2025 André Apitzsch <[email protected]> + */ + +#include <linux/input.h> +#include <linux/property.h> +#include "rmi_driver.h" + +#define RMI_F1A_BUTTON_BITMASK_SIZE 1 + +struct f1a_data { + u32 *keymap; + unsigned int num_keys; + + struct input_dev *input; +}; + +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 ret; + + if (!device_property_present(dev, buttons_property)) + return 0; + + n_keys = device_property_count_u32(dev, buttons_property); + if (n_keys <= 0) { + ret = n_keys < 0 ? n_keys : -EINVAL; + dev_err(dev, "Invalid/malformed '%s' property: %d\n", + buttons_property, ret); + return ret; + } + + buttonmap = devm_kmalloc_array(dev, n_keys, sizeof(*buttonmap), + GFP_KERNEL); + if (!buttonmap) + return -ENOMEM; + + ret = device_property_read_u32_array(dev, buttons_property, buttonmap, + n_keys); + if (ret) { + dev_err(dev, "Failed to parse '%s' property: %d\n", + buttons_property, ret); + return ret; + } + + 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 ret; + + ret = rmi_read_block(fn->rmi_dev, fn->fd.data_base_addr, + &button_bitmask, RMI_F1A_BUTTON_BITMASK_SIZE); + if (ret < 0) { + dev_err(&fn->dev, "Failed to read object data. Code: %d.\n", + ret); + return IRQ_RETVAL(ret); + } + + 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 ret; + int i; + + ret = rmi_f1a_parse_device_properties(fn, f1a); + if (ret) + return ret; + + 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 ret; + + 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; + + ret = rmi_f1a_initialize(fn, f1a); + if (ret) + return ret; + + 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, +}; -- 2.50.0
