[DM/INPUT] Add simple drivers

1. GPIO-Key always use in poweroff/reset in OFW.
2. E3xx Button is a simple power event input device,
   Just two IRQs work.

Signed-off-by: GuEe-GUI <2991707448@qq.com>

components/drivers/input/Kconfig

@@ -9,3 +9,8 @@ config RT_INPUT_POWER
     bool "Input event power"
     depends on RT_USING_INPUT
     default y
+
+if RT_USING_INPUT
+    rsource "keyboard/Kconfig"
+    rsource "misc/Kconfig"
+endif

components/drivers/input/keyboard/Kconfig

@@ -0,0 +1,13 @@
+menuconfig RT_INPUT_KEYBOARD
+    bool "Keyboards"
+    default n
+
+config RT_INPUT_KEYBOARD_GPIO
+    bool "GPIO"
+    depends on RT_INPUT_KEYBOARD
+    depends on RT_USING_OFW
+    default n
+
+if RT_INPUT_KEYBOARD
+    osource "$(SOC_DM_INPUT_KEYBOARD_DIR)/Kconfig"
+endif

components/drivers/input/keyboard/SConscript

@@ -0,0 +1,18 @@
+from building import *
+
+group = []
+
+if not GetDepend(['RT_INPUT_KEYBOARD']):
+    Return('group')
+
+cwd = GetCurrentDir()
+CPPPATH = [cwd + '/../../include']
+
+src = []
+
+if GetDepend(['RT_INPUT_KEYBOARD_GPIO']):
+    src += ['keys-gpio.c']
+
+group = DefineGroup('DeviceDrivers', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')

components/drivers/input/keyboard/keys-gpio.c

@@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-3-08      GuEe-GUI     the first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <dt-bindings/input/event-codes.h>
+
+#define DBG_TAG "input.keyboard.gpio"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+struct gpio_key
+{
+    struct rt_input_device parent;
+
+    rt_base_t pin;
+    rt_uint8_t mode;
+    rt_uint32_t code;
+};
+
+static void gpio_key_event(void *data)
+{
+    struct gpio_key *gkey = data;
+
+    rt_input_report_key(&gkey->parent, gkey->code, 1);
+    rt_input_sync(&gkey->parent);
+
+    rt_input_report_key(&gkey->parent, gkey->code, 0);
+    rt_input_sync(&gkey->parent);
+}
+
+static rt_err_t ofw_append_gpio_key(struct rt_ofw_node *np)
+{
+    rt_err_t err = RT_EOK;
+    rt_uint32_t debounce;
+    const char *propname;
+    struct gpio_key *gkey = rt_calloc(1, sizeof(*gkey));
+
+    gkey->pin = rt_ofw_get_named_pin(np, RT_NULL, 0, &gkey->mode, RT_NULL);
+
+    if (gkey->pin < 0)
+    {
+        err = gkey->pin;
+
+        goto _fail;
+    }
+
+    if ((propname = rt_ofw_get_prop_fuzzy_name(np, ",code$")) &&
+        !rt_ofw_prop_read_u32(np, propname, &gkey->code))
+    {
+        rt_input_set_capability(&gkey->parent, EV_KEY, gkey->code);
+
+        if (!(err = rt_input_device_register(&gkey->parent)))
+        {
+            err = rt_pin_attach_irq(gkey->pin, gkey->mode, gpio_key_event, gkey);
+
+            if (err)
+            {
+                rt_input_device_unregister(&gkey->parent);
+                goto _fail;
+            }
+
+            rt_pin_irq_enable(gkey->pin, RT_TRUE);
+        }
+    }
+
+    if (err)
+    {
+        goto _fail;
+    }
+
+    if (!rt_ofw_prop_read_u32(np, "debounce-interval", &debounce))
+    {
+        rt_pin_debounce(gkey->pin, debounce);
+    }
+
+    rt_ofw_data(np) = gkey;
+
+    return RT_EOK;
+
+_fail:
+    rt_free(gkey);
+
+    return err;
+}
+
+static rt_err_t gpio_key_probe(struct rt_platform_device *pdev)
+{
+    rt_err_t err = RT_EOK;
+    struct rt_ofw_node *key_np, *np = pdev->parent.ofw_node;
+
+#ifdef RT_USING_PINCTRL
+    rt_pin_ctrl_confs_apply(&pdev->parent, 0);
+#endif
+
+    rt_ofw_foreach_available_child_node(np, key_np)
+    {
+        err = ofw_append_gpio_key(key_np);
+
+        if (err == -RT_ENOMEM)
+        {
+            rt_ofw_node_put(key_np);
+
+            return err;
+        }
+        else if (err)
+        {
+            LOG_E("%s: create KEY fail", rt_ofw_node_full_name(key_np));
+            continue;
+        }
+    }
+
+    return err;
+}
+
+static rt_err_t gpio_key_remove(struct rt_platform_device *pdev)
+{
+    struct rt_ofw_node *key_np, *np = pdev->parent.ofw_node;
+
+    rt_ofw_foreach_available_child_node(np, key_np)
+    {
+        struct gpio_key *gkey = rt_ofw_data(key_np);
+
+        if (!gkey)
+        {
+            continue;
+        }
+
+        rt_ofw_data(key_np) = RT_NULL;
+
+        rt_pin_irq_enable(gkey->pin, RT_FALSE);
+        rt_pin_detach_irq(gkey->pin);
+
+        rt_input_device_unregister(&gkey->parent);
+
+        rt_free(gkey);
+    }
+
+    return RT_EOK;
+}
+
+static const struct rt_ofw_node_id gpio_key_ofw_ids[] =
+{
+    { .compatible = "gpio-keys" },
+    { /* sentinel */ }
+};
+
+static struct rt_platform_driver gpio_key_driver =
+{
+    .name = "gpio-keys",
+    .ids = gpio_key_ofw_ids,
+
+    .probe = gpio_key_probe,
+    .remove = gpio_key_remove,
+};
+RT_PLATFORM_DRIVER_EXPORT(gpio_key_driver);

components/drivers/input/misc/Kconfig

@@ -0,0 +1,12 @@
+menuconfig RT_INPUT_MISC
+    bool "Misc"
+    default n
+
+config RT_INPUT_MISC_BUTTON_E3X0
+    bool "NI Ettus Research USRP E3xx Button support"
+    depends on RT_INPUT_MISC
+    default n
+
+if RT_INPUT_MISC
+    osource "$(SOC_DM_INPUT_MISC_DIR)/Kconfig"
+endif

components/drivers/input/misc/SConscript

@@ -0,0 +1,18 @@
+from building import *
+
+group = []
+
+if not GetDepend(['RT_INPUT_MISC']):
+    Return('group')
+
+cwd = GetCurrentDir()
+CPPPATH = [cwd + '/../../include']
+
+src = []
+
+if GetDepend(['RT_INPUT_MISC_BUTTON_E3X0']):
+    src += ['button-e3x0.c']
+
+group = DefineGroup('DeviceDrivers', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')

components/drivers/input/misc/button-e3x0.c

@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-3-08      GuEe-GUI     the first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <rtdevice.h>
+
+struct e3x0_button
+{
+    struct rt_input_device parent;
+
+    int press_irq, release_irq;
+};
+
+static void e3x0_button_press_isr(int irqno, void *param)
+{
+    struct e3x0_button *btn = param;
+
+    rt_input_report_key(&btn->parent, KEY_POWER, 1);
+    rt_input_sync(&btn->parent);
+}
+
+static void e3x0_button_release_isr(int irqno, void *param)
+{
+    struct e3x0_button *btn = param;
+
+    rt_input_report_key(&btn->parent, KEY_POWER, 0);
+    rt_input_sync(&btn->parent);
+}
+
+static rt_err_t e3x0_button_probe(struct rt_platform_device *pdev)
+{
+    rt_err_t err;
+    struct rt_device *dev = &pdev->parent;
+    struct e3x0_button *btn = rt_calloc(1, sizeof(*btn));
+
+    if (!btn)
+    {
+        return -RT_ENOMEM;
+    }
+
+    if ((btn->press_irq = rt_dm_dev_get_irq_by_name(dev, "press")) < 0)
+    {
+        err = btn->press_irq;
+        goto _fail;
+    }
+
+    if ((btn->release_irq = rt_dm_dev_get_irq_by_name(dev, "release")) < 0)
+    {
+        err = btn->release_irq;
+        goto _fail;
+    }
+
+    rt_input_set_capability(&btn->parent, EV_KEY, KEY_POWER);
+
+    if ((err = rt_input_device_register(&btn->parent)))
+    {
+        goto _fail;
+    }
+
+    dev->user_data = btn;
+
+    rt_hw_interrupt_install(btn->press_irq, e3x0_button_press_isr, btn, "button-e3x0-press");
+    rt_hw_interrupt_umask(btn->press_irq);
+
+    rt_hw_interrupt_install(btn->release_irq, e3x0_button_release_isr, btn, "button-e3x0-release");
+    rt_hw_interrupt_umask(btn->release_irq);
+
+    return RT_EOK;
+
+_fail:
+    rt_free(btn);
+
+    return err;
+}
+
+static rt_err_t e3x0_button_remove(struct rt_platform_device *pdev)
+{
+    struct e3x0_button *btn = pdev->parent.user_data;
+
+    rt_hw_interrupt_mask(btn->press_irq);
+    rt_pic_detach_irq(btn->press_irq, btn);
+
+    rt_hw_interrupt_mask(btn->release_irq);
+    rt_pic_detach_irq(btn->release_irq, btn);
+
+    rt_input_device_unregister(&btn->parent);
+
+    rt_free(btn);
+
+    return RT_EOK;
+}
+
+static const struct rt_ofw_node_id e3x0_button_ofw_ids[] =
+{
+    { .compatible = "ettus,e3x0-button" },
+    { /* sentinel */ }
+};
+
+static struct rt_platform_driver e3x0_button_driver =
+{
+    .name = "e3x0-button",
+    .ids = e3x0_button_ofw_ids,
+
+    .probe = e3x0_button_probe,
+    .remove = e3x0_button_remove,
+};
+RT_PLATFORM_DRIVER_EXPORT(e3x0_button_driver);