@@ -83,6 +83,17 @@ config INPUT_ARIZONA_HAPTICS
To compile this driver as a module, choose M here: the
module will be called arizona-haptics.
+config INPUT_ATC260X_ONKEY
+ tristate "Actions Semi ATC260x PMIC ONKEY"
+ depends on MFD_ATC260X
+ help
+ Support the ONKEY of ATC260x PMICs as an input device reporting
+ power button status. ONKEY can be used to wakeup from low power
+ modes and force a reset on long press.
+
+ To compile this driver as a module, choose M here: the
+ module will be called atc260x-onkey.
+
config INPUT_ATMEL_CAPTOUCH
tristate "Atmel Capacitive Touch Button Driver"
depends on OF || COMPILE_TEST
@@ -0,0 +1,304 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Onkey driver for Actions Semi ATC260x PMICs.
+ *
+ * Copyright (c) 2020 Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/atc260x/core.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+/* <2s for short press, >2s for long press */
+#define KEY_PRESS_TIME_SEC 2
+
+/* Driver internals */
+enum atc260x_onkey_reset_status {
+ KEY_RESET_HW_DEFAULT,
+ KEY_RESET_DISABLED,
+ KEY_RESET_USER_SEL,
+};
+
+struct atc260x_onkey_params {
+ u32 reg_int_ctl;
+ u32 kdwn_state_bm;
+ u32 long_int_pnd_bm;
+ u32 short_int_pnd_bm;
+ u32 kdwn_int_pnd_bm;
+ u32 press_int_en_bm;
+ u32 kdwn_int_en_bm;
+ u32 press_time_bm;
+ u32 reset_en_bm;
+ u32 reset_time_bm;
+};
+
+struct atc260x_onkey {
+ struct atc260x *atc260x;
+ const struct atc260x_onkey_params *params;
+ struct input_dev *input_dev;
+ struct delayed_work work;
+};
+
+static const struct atc260x_onkey_params atc2603c_onkey_params = {
+ .reg_int_ctl = ATC2603C_PMU_SYS_CTL2,
+ .long_int_pnd_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_LONG_PRESS,
+ .short_int_pnd_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_SHORT_PRESS,
+ .kdwn_int_pnd_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_PRESS_PD,
+ .press_int_en_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_INT_EN,
+ .kdwn_int_en_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_PRESS_INT_EN,
+ .kdwn_state_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_PRESS,
+ .press_time_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_PRESS_TIME,
+ .reset_en_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_PRESS_RESET_EN,
+ .reset_time_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_RESET_TIME_SEL,
+};
+
+static const struct atc260x_onkey_params atc2609a_onkey_params = {
+ .reg_int_ctl = ATC2609A_PMU_SYS_CTL2,
+ .long_int_pnd_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_LONG_PRESS,
+ .short_int_pnd_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_SHORT_PRESS,
+ .kdwn_int_pnd_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_PRESS_PD,
+ .press_int_en_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_LSP_INT_EN,
+ .kdwn_int_en_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_PRESS_INT_EN,
+ .kdwn_state_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_PRESS,
+ .press_time_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_PRESS_TIME,
+ .reset_en_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_RESET_EN,
+ .reset_time_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_RESET_TIME_SEL,
+};
+
+static int atc2603x_onkey_hw_init(struct atc260x_onkey *onkey,
+ enum atc260x_onkey_reset_status reset_status,
+ u32 reset_time, u32 press_time)
+{
+ u32 reg_bm, reg_val;
+
+ reg_bm = onkey->params->long_int_pnd_bm |
+ onkey->params->short_int_pnd_bm |
+ onkey->params->kdwn_int_pnd_bm |
+ onkey->params->press_int_en_bm |
+ onkey->params->kdwn_int_en_bm;
+
+ reg_val = reg_bm | press_time;
+ reg_bm |= onkey->params->press_time_bm;
+
+ if (reset_status == KEY_RESET_DISABLED) {
+ reg_bm |= onkey->params->reset_en_bm;
+ } else if (reset_status == KEY_RESET_USER_SEL) {
+ reg_bm |= onkey->params->reset_en_bm |
+ onkey->params->reset_time_bm;
+ reg_val |= onkey->params->reset_en_bm | reset_time;
+ }
+
+ return regmap_update_bits(onkey->atc260x->regmap,
+ onkey->params->reg_int_ctl, reg_bm, reg_val);
+}
+
+static void atc260x_onkey_query(struct atc260x_onkey *onkey)
+{
+ u32 reg_bits;
+ int ret, key_down;
+
+ ret = regmap_read(onkey->atc260x->regmap,
+ onkey->params->reg_int_ctl, &key_down);
+ if (ret) {
+ key_down = 1;
+ dev_err(onkey->atc260x->dev,
+ "Failed to read onkey status: %d\n", ret);
+ } else {
+ key_down &= onkey->params->kdwn_state_bm;
+ }
+
+ /*
+ * The hardware generates interrupt only when the onkey pin is
+ * asserted. Hence, the deassertion of the pin is simulated through
+ * work queue.
+ */
+ if (key_down) {
+ schedule_delayed_work(&onkey->work, msecs_to_jiffies(200));
+ return;
+ }
+
+ /*
+ * The key-down status bit is cleared when the On/Off button
+ * is released.
+ */
+ input_report_key(onkey->input_dev, KEY_POWER, 0);
+ input_sync(onkey->input_dev);
+
+ reg_bits = onkey->params->long_int_pnd_bm |
+ onkey->params->short_int_pnd_bm |
+ onkey->params->kdwn_int_pnd_bm |
+ onkey->params->press_int_en_bm |
+ onkey->params->kdwn_int_en_bm;
+
+ /* Clear key press pending events and enable key press interrupts. */
+ regmap_update_bits(onkey->atc260x->regmap, onkey->params->reg_int_ctl,
+ reg_bits, reg_bits);
+}
+
+static void atc260x_onkey_work(struct work_struct *work)
+{
+ struct atc260x_onkey *onkey = container_of(work, struct atc260x_onkey,
+ work.work);
+ atc260x_onkey_query(onkey);
+}
+
+static irqreturn_t atc260x_onkey_irq(int irq, void *data)
+{
+ struct atc260x_onkey *onkey = data;
+ int ret;
+
+ /* Disable key press interrupts. */
+ ret = regmap_update_bits(onkey->atc260x->regmap,
+ onkey->params->reg_int_ctl,
+ onkey->params->press_int_en_bm |
+ onkey->params->kdwn_int_en_bm, 0);
+ if (ret)
+ dev_err(onkey->atc260x->dev,
+ "Failed to disable interrupts: %d\n", ret);
+
+ input_report_key(onkey->input_dev, KEY_POWER, 1);
+ input_sync(onkey->input_dev);
+
+ atc260x_onkey_query(onkey);
+
+ return IRQ_HANDLED;
+}
+
+static int atc260x_onkey_probe(struct platform_device *pdev)
+{
+ struct atc260x *atc260x = dev_get_drvdata(pdev->dev.parent);
+ struct atc260x_onkey *onkey;
+ struct input_dev *input_dev;
+ enum atc260x_onkey_reset_status reset_status;
+ u32 press_time = KEY_PRESS_TIME_SEC, reset_time = 0;
+ int val, irq, ret;
+
+ if (!pdev->dev.of_node)
+ return -ENXIO;