* [PATCH V2 1/2] Documentation: devicetree: bindings: input
2019-12-27 1:34 [patch v2] drivers: input: keyboard: add mediatek matrix keypad drivers fengping.yu
@ 2019-12-27 1:34 ` fengping.yu
2019-12-27 1:34 ` [PATCH V2 2/2] drivers: input: keyboard fengping.yu
1 sibling, 0 replies; 3+ messages in thread
From: fengping.yu @ 2019-12-27 1:34 UTC (permalink / raw)
To: Matthias Brugger
Cc: devicetree, fengping.yu, linux-mediatek, linux-kernel,
wsd_upstream
Add mtk keypad device tree documentation.
Change-Id: I415b76ee980784992763c768829b2dda76699dea
Signed-off-by: fengping.yu <fengping.yu@mediatek.com>
---
.../devicetree/bindings/input/mtk-kpd.txt | 45 +++++++++++++++++++
1 file changed, 45 insertions(+)
create mode 100644 Documentation/devicetree/bindings/input/mtk-kpd.txt
diff --git a/Documentation/devicetree/bindings/input/mtk-kpd.txt b/Documentation/devicetree/bindings/input/mtk-kpd.txt
new file mode 100644
index 000000000000..2af81e696159
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/mtk-kpd.txt
@@ -0,0 +1,45 @@
+* Mediatek's Keypad Controller device tree binding
+
+Mediatek's Keypad controller is used to interface a SoC with a matrix-type
+keypad device. The keypad controller supports multiple row and column lines.
+A key can be placed at each intersection of a unique row and a unique column.
+The keypad controller can sense a key-press and key-release and report the
+event using a interrupt to the cpu.
+
+Required properties:
+- compatible should contain:
+ * "mediatek,mt6779-keypad" for MT6779 keypad
+ * "mediatek,kp" for common keypad
+
+- reg: The base address of the Keypad register bank.
+
+- interrupts: A single interrupt specifier.
+
+- mediatek,key-debounce-ms: Debounce interval in milliseconds, maximum value
+ is 256ms
+
+- mediatek,hw-map-num: Number of entries of keycode in mediatek,hw-init-map
+
+- mediatek,hw-init-map: An array of packed 1-cell entries containing the
+ equivalent of hw-map-num linux key-code. Each cell is Linux keymap of
+ corresponding row/col, arrange like this:
+
+ row0col0, row0col1, row0col2,...row0col8,
+ row1col0, row1col1, row1col2,...row1col8,
+ ...
+ row7col0, row7col1, row7col2,...row7col8.
+
+Example:
+
+ keypad: kp@10010000 {
+ compatible = "mediatek,mt6779-keypad", "mediatek,kp";
+ reg = <0 0x10010000 0 0x1000>;
+ interrupts = <GIC_SPI 75 IRQ_TYPE_EDGE_FALLING>;
+ };
+
+ &keypad {
+ mediatek,key-debounce-ms = <1024>;
+ /*HW Keycode [0~71] -> Linux Keycode*/
+ mediatek,khw-map-num = <72>;
+ mediatek,hw-init-map = <114 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 >;
+ };
--
2.18.0
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http://lists.infradead.org/mailman/listinfo/linux-mediatek
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH V2 2/2] drivers: input: keyboard
2019-12-27 1:34 [patch v2] drivers: input: keyboard: add mediatek matrix keypad drivers fengping.yu
2019-12-27 1:34 ` [PATCH V2 1/2] Documentation: devicetree: bindings: input fengping.yu
@ 2019-12-27 1:34 ` fengping.yu
1 sibling, 0 replies; 3+ messages in thread
From: fengping.yu @ 2019-12-27 1:34 UTC (permalink / raw)
To: Matthias Brugger
Cc: devicetree, fengping.yu, linux-mediatek, linux-kernel,
wsd_upstream
add mtk keypad driver
Change-Id: I778def5a83621a5242d0bac7abfa20a7e5f89924
Signed-off-by: fengping.yu <fengping.yu@mediatek.com>
---
arch/arm64/configs/defconfig | 1 +
drivers/input/keyboard/Kconfig | 8 +
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/mtk-kpd.c | 357 +++++++++++++++++++++++++++++++
4 files changed, 367 insertions(+)
create mode 100644 drivers/input/keyboard/mtk-kpd.c
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 8e05c39eab08..62bed77ec127 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -315,6 +315,7 @@ CONFIG_KEYBOARD_ADC=m
CONFIG_KEYBOARD_GPIO=y
CONFIG_KEYBOARD_SNVS_PWRKEY=m
CONFIG_KEYBOARD_CROS_EC=y
+CONFIG_KEYBOARD_MTK=y
CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_TOUCHSCREEN_ATMEL_MXT=m
CONFIG_INPUT_MISC=y
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index 8911bc2ec42a..01747a97536b 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -775,4 +775,12 @@ config KEYBOARD_MTK_PMIC
To compile this driver as a module, choose M here: the
module will be called pmic-keys.
+config KEYBOARD_MTK
+ tristate "MediaTek Keypad Support"
+ help
+ Say Y here if you want to use the keypad.
+ If unuse, say N.
+ To compile this driver as a module, choose M here: the
+ module will be called mtk-kpd.
+
endif
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 9510325c0c5d..daa654bcce6e 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -41,6 +41,7 @@ obj-$(CONFIG_KEYBOARD_MATRIX) += matrix_keypad.o
obj-$(CONFIG_KEYBOARD_MAX7359) += max7359_keypad.o
obj-$(CONFIG_KEYBOARD_MCS) += mcs_touchkey.o
obj-$(CONFIG_KEYBOARD_MPR121) += mpr121_touchkey.o
+obj-$(CONFIG_KEYBOARD_MTK) += mtk-kpd.o
obj-$(CONFIG_KEYBOARD_MTK_PMIC) += mtk-pmic-keys.o
obj-$(CONFIG_KEYBOARD_NEWTON) += newtonkbd.o
obj-$(CONFIG_KEYBOARD_NOMADIK) += nomadik-ske-keypad.o
diff --git a/drivers/input/keyboard/mtk-kpd.c b/drivers/input/keyboard/mtk-kpd.c
new file mode 100644
index 000000000000..740a58b44dac
--- /dev/null
+++ b/drivers/input/keyboard/mtk-kpd.c
@@ -0,0 +1,357 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 MediaTek Inc.
+ * Author Terry Chang <terry.chang@mediatek.com>
+ */
+#include <linux/atomic.h>
+#include <linux/clk.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/gpio.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/ioctl.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/pm_wakeup.h>
+#include <linux/regmap.h>
+#include <linux/timer.h>
+#include <linux/workqueue.h>
+
+#define KPD_NAME "mtk-kpd"
+
+#define KP_STA (0x0000)
+#define KP_MEM1 (0x0004)
+#define KP_MEM2 (0x0008)
+#define KP_MEM3 (0x000c)
+#define KP_MEM4 (0x0010)
+#define KP_MEM5 (0x0014)
+#define KP_DEBOUNCE (0x0018)
+#define KP_SEL (0x0020)
+#define KP_EN (0x0024)
+
+#define KP_COL0_SEL (1 << 10)
+#define KP_COL1_SEL (1 << 11)
+#define KP_COL2_SEL (1 << 12)
+
+#define KPD_DEBOUNCE_MASK ((1U << 14) - 1)
+#define KPD_DOUBLE_KEY_MASK (1U << 0)
+
+#define KPD_NUM_MEMS 5
+#define KPD_MEM5_BITS 8
+#define KPD_NUM_KEYS 72 /* 4 * 16 + KPD_MEM5_BITS */
+
+struct mtk_keypad {
+ struct input_dev *input_dev;
+ struct wakeup_source *suspend_lock;
+ struct tasklet_struct tasklet;
+ struct clk *clk;
+ void __iomem *base;
+ unsigned int irqnr;
+ u32 key_debounce;
+ u32 hw_map_num;
+ u32 hw_init_map[KPD_NUM_KEYS];
+ u16 keymap_state[KPD_NUM_MEMS];
+};
+
+/* for keymap handling */
+static void kpd_keymap_handler(unsigned long data);
+
+static int kpd_pdrv_probe(struct platform_device *pdev);
+
+static void kpd_get_keymap_state(void __iomem *kp_base, u16 state[])
+{
+ state[0] = readw(kp_base + KP_MEM1);
+ state[1] = readw(kp_base + KP_MEM2);
+ state[2] = readw(kp_base + KP_MEM3);
+ state[3] = readw(kp_base + KP_MEM4);
+ state[4] = readw(kp_base + KP_MEM5);
+ pr_debug("kpd register = %x %x %x %x %x\n",
+ state[0], state[1], state[2], state[3], state[4]);
+}
+
+static void kpd_keymap_handler(unsigned long data)
+{
+ int i, j;
+ int pressed;
+ u16 new_state[KPD_NUM_MEMS], change, mask;
+ u16 hw_keycode, keycode;
+ void *dest;
+ struct mtk_keypad *keypad = (struct mtk_keypad *)data;
+
+ kpd_get_keymap_state(keypad->base, new_state);
+
+ __pm_wakeup_event(keypad->suspend_lock, 500);
+
+ for (i = 0; i < KPD_NUM_MEMS; i++) {
+ change = new_state[i] ^ keypad->keymap_state[i];
+ if (!change)
+ continue;
+
+ for (j = 0; j < 16U; j++) {
+ mask = (u16)1 << j;
+ if (!(change & mask))
+ continue;
+
+ hw_keycode = (i << 4) + j;
+
+ if (hw_keycode >= KPD_NUM_KEYS)
+ continue;
+
+ /* bit is 1: not pressed, 0: pressed */
+ pressed = (new_state[i] & mask) == 0U;
+ pr_debug("(%s) HW keycode = %d\n",
+ (pressed) ? "pressed" : "released",
+ hw_keycode);
+
+ keycode = keypad->hw_init_map[hw_keycode];
+ if (!keycode)
+ continue;
+ input_report_key(keypad->input_dev, keycode, pressed);
+ input_sync(keypad->input_dev);
+ pr_debug("report Linux keycode = %d\n", keycode);
+ }
+ }
+
+ dest = memcpy(keypad->keymap_state, new_state, sizeof(new_state));
+ enable_irq(keypad->irqnr);
+}
+
+static irqreturn_t kpd_irq_handler(int irq, void *dev_id)
+{
+ /* use _nosync to avoid deadlock */
+ struct mtk_keypad *keypad = dev_id;
+
+ disable_irq_nosync(keypad->irqnr);
+ tasklet_schedule(&keypad->tasklet);
+ return IRQ_HANDLED;
+}
+
+static int kpd_get_dts_info(struct mtk_keypad *keypad,
+ struct device_node *node)
+{
+ int ret;
+
+ ret = of_property_read_u32(node, "mediatek,key-debounce-ms",
+ &keypad->key_debounce);
+ if (ret) {
+ pr_debug("read mediatek,key-debounce-ms error.\n");
+ return ret;
+ }
+
+ ret = of_property_read_u32(node, "mediatek,hw-map-num",
+ &keypad->hw_map_num);
+ if (ret) {
+ pr_debug("read mediatek,hw-map-num error.\n");
+ return ret;
+ }
+
+ if (keypad->hw_map_num > KPD_NUM_KEYS) {
+ pr_debug("hw-map-num error, it cannot bigger than %d.\n",
+ KPD_NUM_KEYS);
+ return -EINVAL;
+ }
+
+ ret = of_property_read_u32_array(node, "mediatek,hw-init-map",
+ keypad->hw_init_map,
+ keypad->hw_map_num);
+
+ if (ret) {
+ pr_debug("hw-init-map was not defined in dts.\n");
+ return ret;
+ }
+
+ pr_debug("deb= %d\n", keypad->key_debounce);
+
+ return 0;
+}
+
+static int kpd_gpio_init(struct device *dev)
+{
+ struct pinctrl *keypad_pinctrl;
+ struct pinctrl_state *kpd_default;
+
+ keypad_pinctrl = devm_pinctrl_get(dev);
+ if (IS_ERR(keypad_pinctrl)) {
+ pr_debug("Cannot find keypad_pinctrl!\n");
+
+ return (int)PTR_ERR(keypad_pinctrl);
+ }
+
+ kpd_default = pinctrl_lookup_state(keypad_pinctrl, "default");
+ if (IS_ERR(kpd_default)) {
+ pr_debug("Cannot find ecall_state!\n");
+
+ return (int)PTR_ERR(kpd_default);
+ }
+
+ return pinctrl_select_state(keypad_pinctrl,
+ kpd_default);
+}
+
+static int kpd_pdrv_probe(struct platform_device *pdev)
+{
+ struct mtk_keypad *keypad;
+ struct resource *res;
+ int i;
+ int err;
+
+ keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL);
+ if (!keypad)
+ return -ENOMEM;
+
+ keypad->clk = devm_clk_get(&pdev->dev, "kpd");
+ if (IS_ERR(keypad->clk)) {
+ pr_notice("get kpd-clk fail: %d\n", (int)PTR_ERR(keypad->clk));
+ return (int)PTR_ERR(keypad->clk);
+ }
+
+ err = clk_prepare_enable(keypad->clk);
+ if (err) {
+ pr_notice("kpd-clk prepare enable failed.\n");
+ return err;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ err = -ENODEV;
+ goto err_unprepare_clk;
+ }
+
+ keypad->base = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!keypad->base) {
+ pr_notice("KP iomap failed\n");
+ err = -EBUSY;
+ goto err_unprepare_clk;
+ }
+
+ keypad->irqnr = irq_of_parse_and_map(pdev->dev.of_node, 0);
+ if (!keypad->irqnr) {
+ pr_notice("KP get irqnr failed\n");
+ err = -ENODEV;
+ goto err_unprepare_clk;
+ }
+
+ pr_info("kp base: 0x%p, addr:0x%p, kp irq: %d\n",
+ keypad->base, &keypad->base, keypad->irqnr);
+ err = kpd_gpio_init(&pdev->dev);
+ if (err) {
+ pr_debug("gpio init failed\n");
+ goto err_unprepare_clk;
+ }
+
+ err = kpd_get_dts_info(keypad, pdev->dev.of_node);
+ if (err) {
+ pr_debug("get dts info failed.\n");
+ goto err_unprepare_clk;
+ }
+
+ memset(keypad->keymap_state, 0xff, sizeof(keypad->keymap_state));
+
+ keypad->input_dev = devm_input_allocate_device(&pdev->dev);
+ if (!keypad->input_dev) {
+ pr_notice("input allocate device fail.\n");
+ err = -ENOMEM;
+ goto err_unprepare_clk;
+ }
+
+ keypad->input_dev->name = KPD_NAME;
+ keypad->input_dev->id.bustype = BUS_HOST;
+ keypad->input_dev->dev.parent = &pdev->dev;
+
+ __set_bit(EV_KEY, keypad->input_dev->evbit);
+
+ for (i = 0; i < KPD_NUM_KEYS; i++) {
+ if (keypad->hw_init_map[i])
+ __set_bit(keypad->hw_init_map[i],
+ keypad->input_dev->keybit);
+ }
+
+ err = input_register_device(keypad->input_dev);
+ if (err) {
+ pr_notice("register input device failed (%d)\n", err);
+ goto err_unprepare_clk;
+ }
+
+ input_set_drvdata(keypad->input_dev, keypad);
+
+ keypad->suspend_lock = wakeup_source_register(NULL, "kpd wakelock");
+ if (!keypad->suspend_lock) {
+ pr_notice("wakeup source init failed.\n");
+ err = -ENOMEM;
+ goto err_unregister_device;
+ }
+
+ tasklet_init(&keypad->tasklet, kpd_keymap_handler,
+ (unsigned long)keypad);
+
+ writew((u16)(keypad->key_debounce & KPD_DEBOUNCE_MASK),
+ keypad->base + KP_DEBOUNCE);
+
+ /* register IRQ */
+ err = request_irq(keypad->irqnr, kpd_irq_handler, IRQF_TRIGGER_NONE,
+ KPD_NAME, keypad);
+ if (err) {
+ pr_notice("register IRQ failed (%d)\n", err);
+ goto err_irq;
+ }
+
+ pr_info("kpd_probe OK.\n");
+
+ return 0;
+
+err_irq:
+ tasklet_kill(&keypad->tasklet);
+ wakeup_source_unregister(keypad->suspend_lock);
+
+err_unregister_device:
+ input_unregister_device(keypad->input_dev);
+
+err_unprepare_clk:
+ clk_disable_unprepare(keypad->clk);
+
+ return err;
+}
+
+static int kpd_pdrv_remove(struct platform_device *pdev)
+{
+ struct mtk_keypad *keypad = platform_get_drvdata(pdev);
+
+ tasklet_kill(&keypad->tasklet);
+ wakeup_source_unregister(keypad->suspend_lock);
+ input_unregister_device(keypad->input_dev);
+ clk_disable_unprepare(keypad->clk);
+
+ return 0;
+}
+
+static const struct of_device_id kpd_of_match[] = {
+ {.compatible = "mediatek,mt6779-keypad"},
+ {.compatible = "mediatek,kp"},
+ {},
+};
+
+static struct platform_driver kpd_pdrv = {
+ .probe = kpd_pdrv_probe,
+ .remove = kpd_pdrv_remove,
+ .driver = {
+ .name = KPD_NAME,
+ .of_match_table = kpd_of_match,
+ },
+};
+
+module_platform_driver(kpd_pdrv);
+
+MODULE_AUTHOR("Mediatek Corporation");
+MODULE_DESCRIPTION("MTK Keypad (KPD) Driver");
+MODULE_LICENSE("GPL");
--
2.18.0
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Linux-mediatek@lists.infradead.org
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^ permalink raw reply related [flat|nested] 3+ messages in thread