diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/surface/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/platform/surface/Makefile | 1 | ||||
| -rw-r--r-- | drivers/platform/surface/surface3_button.c | 247 |
3 files changed, 0 insertions, 255 deletions
diff --git a/drivers/platform/surface/Kconfig b/drivers/platform/surface/Kconfig index 463f1ec5c14e..eb79fbed8059 100644 --- a/drivers/platform/surface/Kconfig +++ b/drivers/platform/surface/Kconfig @@ -28,13 +28,6 @@ config SURFACE3_WMI To compile this driver as a module, choose M here: the module will be called surface3-wmi. -config SURFACE_3_BUTTON - tristate "Power/home/volume buttons driver for Microsoft Surface 3 tablet" - depends on ACPI - depends on KEYBOARD_GPIO && I2C - help - This driver handles the power/home/volume buttons on the Microsoft Surface 3 tablet. - config SURFACE_3_POWER_OPREGION tristate "Surface 3 battery platform operation region support" depends on ACPI diff --git a/drivers/platform/surface/Makefile b/drivers/platform/surface/Makefile index 32889482de55..0fc9cd3e4dd9 100644 --- a/drivers/platform/surface/Makefile +++ b/drivers/platform/surface/Makefile @@ -5,7 +5,6 @@ # obj-$(CONFIG_SURFACE3_WMI) += surface3-wmi.o -obj-$(CONFIG_SURFACE_3_BUTTON) += surface3_button.o obj-$(CONFIG_SURFACE_3_POWER_OPREGION) += surface3_power.o obj-$(CONFIG_SURFACE_ACPI_NOTIFY) += surface_acpi_notify.o obj-$(CONFIG_SURFACE_AGGREGATOR) += aggregator/ diff --git a/drivers/platform/surface/surface3_button.c b/drivers/platform/surface/surface3_button.c deleted file mode 100644 index 48d77e7aae76..000000000000 --- a/drivers/platform/surface/surface3_button.c +++ /dev/null @@ -1,247 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Supports for the button array on the Surface tablets. - * - * (C) Copyright 2016 Red Hat, Inc - * - * Based on soc_button_array.c: - * - * {C} Copyright 2014 Intel Corporation - */ - -#include <linux/module.h> -#include <linux/input.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/i2c.h> -#include <linux/slab.h> -#include <linux/acpi.h> -#include <linux/gpio/consumer.h> -#include <linux/gpio_keys.h> -#include <linux/gpio.h> -#include <linux/platform_device.h> - - -#define SURFACE_BUTTON_OBJ_NAME "TEV2" -#define MAX_NBUTTONS 4 - -/* - * Some of the buttons like volume up/down are auto repeat, while others - * are not. To support both, we register two platform devices, and put - * buttons into them based on whether the key should be auto repeat. - */ -#define BUTTON_TYPES 2 - -/* - * Power button, Home button, Volume buttons support is supposed to - * be covered by drivers/input/misc/soc_button_array.c, which is implemented - * according to "Windows ACPI Design Guide for SoC Platforms". - * However surface 3 seems not to obey the specs, instead it uses - * device TEV2(MSHW0028) for declaring the GPIOs. The gpios are also slightly - * different in which the Home button is active high. - * Compared to surfacepro3_button.c which also handles MSHW0028, the Surface 3 - * is a reduce platform and thus uses GPIOs, not ACPI events. - * We choose an I2C driver here because we need to access the resources - * declared under the device node, while surfacepro3_button.c only needs - * the ACPI companion node. - */ -static const struct acpi_device_id surface3_acpi_match[] = { - { "MSHW0028", 0 }, - { } -}; -MODULE_DEVICE_TABLE(acpi, surface3_acpi_match); - -struct surface3_button_info { - const char *name; - int acpi_index; - unsigned int event_type; - unsigned int event_code; - bool autorepeat; - bool wakeup; - bool active_low; -}; - -struct surface3_button_data { - struct platform_device *children[BUTTON_TYPES]; -}; - -/* - * Get the Nth GPIO number from the ACPI object. - */ -static int surface3_button_lookup_gpio(struct device *dev, int acpi_index) -{ - struct gpio_desc *desc; - int gpio; - - desc = gpiod_get_index(dev, NULL, acpi_index, GPIOD_ASIS); - if (IS_ERR(desc)) - return PTR_ERR(desc); - - gpio = desc_to_gpio(desc); - - gpiod_put(desc); - - return gpio; -} - -static struct platform_device * -surface3_button_device_create(struct i2c_client *client, - const struct surface3_button_info *button_info, - bool autorepeat) -{ - const struct surface3_button_info *info; - struct platform_device *pd; - struct gpio_keys_button *gpio_keys; - struct gpio_keys_platform_data *gpio_keys_pdata; - int n_buttons = 0; - int gpio; - int error; - - gpio_keys_pdata = devm_kzalloc(&client->dev, - sizeof(*gpio_keys_pdata) + - sizeof(*gpio_keys) * MAX_NBUTTONS, - GFP_KERNEL); - if (!gpio_keys_pdata) - return ERR_PTR(-ENOMEM); - - gpio_keys = (void *)(gpio_keys_pdata + 1); - - for (info = button_info; info->name; info++) { - if (info->autorepeat != autorepeat) - continue; - - gpio = surface3_button_lookup_gpio(&client->dev, - info->acpi_index); - if (!gpio_is_valid(gpio)) - continue; - - gpio_keys[n_buttons].type = info->event_type; - gpio_keys[n_buttons].code = info->event_code; - gpio_keys[n_buttons].gpio = gpio; - gpio_keys[n_buttons].active_low = info->active_low; - gpio_keys[n_buttons].desc = info->name; - gpio_keys[n_buttons].wakeup = info->wakeup; - n_buttons++; - } - - if (n_buttons == 0) { - error = -ENODEV; - goto err_free_mem; - } - - gpio_keys_pdata->buttons = gpio_keys; - gpio_keys_pdata->nbuttons = n_buttons; - gpio_keys_pdata->rep = autorepeat; - - pd = platform_device_alloc("gpio-keys", PLATFORM_DEVID_AUTO); - if (!pd) { - error = -ENOMEM; - goto err_free_mem; - } - - error = platform_device_add_data(pd, gpio_keys_pdata, - sizeof(*gpio_keys_pdata)); - if (error) - goto err_free_pdev; - - error = platform_device_add(pd); - if (error) - goto err_free_pdev; - - return pd; - -err_free_pdev: - platform_device_put(pd); -err_free_mem: - devm_kfree(&client->dev, gpio_keys_pdata); - return ERR_PTR(error); -} - -static int surface3_button_remove(struct i2c_client *client) -{ - struct surface3_button_data *priv = i2c_get_clientdata(client); - - int i; - - for (i = 0; i < BUTTON_TYPES; i++) - if (priv->children[i]) - platform_device_unregister(priv->children[i]); - - return 0; -} - -static struct surface3_button_info surface3_button_surface3[] = { - { "power", 0, EV_KEY, KEY_POWER, false, true, true }, - { "home", 1, EV_KEY, KEY_LEFTMETA, false, true, false }, - { "volume_up", 2, EV_KEY, KEY_VOLUMEUP, true, false, true }, - { "volume_down", 3, EV_KEY, KEY_VOLUMEDOWN, true, false, true }, - { } -}; - -static int surface3_button_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct device *dev = &client->dev; - struct surface3_button_data *priv; - struct platform_device *pd; - int i; - int error; - - if (strncmp(acpi_device_bid(ACPI_COMPANION(&client->dev)), - SURFACE_BUTTON_OBJ_NAME, - strlen(SURFACE_BUTTON_OBJ_NAME))) - return -ENODEV; - - error = gpiod_count(dev, NULL); - if (error < 0) { - dev_dbg(dev, "no GPIO attached, ignoring...\n"); - return error; - } - - priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - i2c_set_clientdata(client, priv); - - for (i = 0; i < BUTTON_TYPES; i++) { - pd = surface3_button_device_create(client, - surface3_button_surface3, - i == 0); - if (IS_ERR(pd)) { - error = PTR_ERR(pd); - if (error != -ENODEV) { - surface3_button_remove(client); - return error; - } - continue; - } - - priv->children[i] = pd; - } - - if (!priv->children[0] && !priv->children[1]) - return -ENODEV; - - return 0; -} - -static const struct i2c_device_id surface3_id[] = { - { } -}; -MODULE_DEVICE_TABLE(i2c, surface3_id); - -static struct i2c_driver surface3_driver = { - .probe = surface3_button_probe, - .remove = surface3_button_remove, - .id_table = surface3_id, - .driver = { - .name = "surface3", - .acpi_match_table = ACPI_PTR(surface3_acpi_match), - }, -}; -module_i2c_driver(surface3_driver); - -MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); -MODULE_DESCRIPTION("surface3 button array driver"); -MODULE_LICENSE("GPL v2"); |