input: add snapshot of qpnp-power-on driver

The qpnp-power-on driver provides support for key presses via
several key specific PMIC inputs.  It also supports reading
power-on reasons and configuring the power-off type (i.e.
restart, shutdown, etc).

This snapshot is taken as of msm-4.19
commit 47598dd0e809 ("input: misc: qpnp-power-on: add support
to power off a modem chip").

Note that support for boot_reason, cold_boot, and ship_mode
configuration was removed as these have unmet dependencies and
are no longer needed.

Change-Id: I8105cf74d65609932146157f82a8e99f29a4dde2
Signed-off-by: David Collins <collinsd@codeaurora.org>

drivers/input/misc/Kconfig

@@ -175,6 +175,15 @@ config INPUT_PMIC8XXX_PWRKEY
 	  To compile this driver as a module, choose M here: the
 	  module will be called pmic8xxx-pwrkey.
 
+config INPUT_QPNP_POWER_ON
+	tristate "QPNP PMIC Power-on support"
+	depends on SPMI
+	help
+	  This option enables device driver support for the power-on
+	  functionality of Qualcomm Technologies, Inc. PNP PMICs.  It supports
+	  reporting the change in status of the KPDPWR_N line (connected to the
+	  power-key) as well as reset features.
+
 config INPUT_SPARCSPKR
 	tristate "SPARC Speaker support"
 	depends on PCI && SPARC64

drivers/input/misc/Makefile

@@ -59,6 +59,7 @@ obj-$(CONFIG_INPUT_PCSPKR)		+= pcspkr.o
 obj-$(CONFIG_INPUT_PM8941_PWRKEY)	+= pm8941-pwrkey.o
 obj-$(CONFIG_INPUT_PM8XXX_VIBRATOR)	+= pm8xxx-vibrator.o
 obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY)	+= pmic8xxx-pwrkey.o
+obj-$(CONFIG_INPUT_QPNP_POWER_ON)	+= qpnp-power-on.o
 obj-$(CONFIG_INPUT_POWERMATE)		+= powermate.o
 obj-$(CONFIG_INPUT_PWM_BEEPER)		+= pwm-beeper.o
 obj-$(CONFIG_INPUT_PWM_VIBRA)		+= pwm-vibra.o

include/linux/input/qpnp-power-on.h

@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2012-2015, 2017-2019, The Linux Foundation.
+ * All rights reserved.
+ */
+
+#ifndef QPNP_PON_H
+#define QPNP_PON_H
+
+#include <dt-bindings/input/qcom,qpnp-power-on.h>
+#include <linux/errno.h>
+
+/**
+ * enum pon_trigger_source: List of PON trigger sources
+ * %PON_SMPL:		PON triggered by Sudden Momentary Power Loss (SMPL)
+ * %PON_RTC:		PON triggered by real-time clock (RTC) alarm
+ * %PON_DC_CHG:		PON triggered by insertion of DC charger
+ * %PON_USB_CHG:	PON triggered by insertion of USB
+ * %PON_PON1:		PON triggered by other PMIC (multi-PMIC option)
+ * %PON_CBLPWR_N:	PON triggered by power-cable insertion
+ * %PON_KPDPWR_N:	PON triggered by long press of the power-key
+ */
+enum pon_trigger_source {
+	PON_SMPL = 1,
+	PON_RTC,
+	PON_DC_CHG,
+	PON_USB_CHG,
+	PON_PON1,
+	PON_CBLPWR_N,
+	PON_KPDPWR_N,
+};
+
+/**
+ * enum pon_power_off_type: Possible power off actions to perform
+ * %PON_POWER_OFF_RESERVED:          Reserved, not used
+ * %PON_POWER_OFF_WARM_RESET:        Reset the MSM but not all PMIC peripherals
+ * %PON_POWER_OFF_SHUTDOWN:          Shutdown the MSM and PMIC completely
+ * %PON_POWER_OFF_HARD_RESET:        Reset the MSM and all PMIC peripherals
+ * %PON_POWER_OFF_MAX_TYPE:          Reserved, not used
+ */
+enum pon_power_off_type {
+	PON_POWER_OFF_RESERVED		= 0x00,
+	PON_POWER_OFF_WARM_RESET	= PON_POWER_OFF_TYPE_WARM_RESET,
+	PON_POWER_OFF_SHUTDOWN		= PON_POWER_OFF_TYPE_SHUTDOWN,
+	PON_POWER_OFF_HARD_RESET	= PON_POWER_OFF_TYPE_HARD_RESET,
+	PON_POWER_OFF_MAX_TYPE		= 0x10,
+};
+
+enum pon_restart_reason {
+	PON_RESTART_REASON_UNKNOWN		= 0x00,
+	PON_RESTART_REASON_RECOVERY		= 0x01,
+	PON_RESTART_REASON_BOOTLOADER		= 0x02,
+	PON_RESTART_REASON_RTC			= 0x03,
+	PON_RESTART_REASON_DMVERITY_CORRUPTED	= 0x04,
+	PON_RESTART_REASON_DMVERITY_ENFORCE	= 0x05,
+	PON_RESTART_REASON_KEYS_CLEAR		= 0x06,
+};
+
+#if IS_ENABLED(CONFIG_INPUT_QPNP_POWER_ON)
+int qpnp_pon_system_pwr_off(enum pon_power_off_type type);
+int qpnp_pon_is_warm_reset(void);
+int qpnp_pon_trigger_config(enum pon_trigger_source pon_src, bool enable);
+int qpnp_pon_wd_config(bool enable);
+int qpnp_pon_set_restart_reason(enum pon_restart_reason reason);
+bool qpnp_pon_check_hard_reset_stored(void);
+int qpnp_pon_modem_pwr_off(enum pon_power_off_type type);
+
+#else
+
+static int qpnp_pon_system_pwr_off(enum pon_power_off_type type)
+{
+	return -ENODEV;
+}
+
+static inline int qpnp_pon_is_warm_reset(void)
+{
+	return -ENODEV;
+}
+
+static inline int qpnp_pon_trigger_config(enum pon_trigger_source pon_src,
+							bool enable)
+{
+	return -ENODEV;
+}
+
+int qpnp_pon_wd_config(bool enable)
+{
+	return -ENODEV;
+}
+
+static inline int qpnp_pon_set_restart_reason(enum pon_restart_reason reason)
+{
+	return -ENODEV;
+}
+
+static inline bool qpnp_pon_check_hard_reset_stored(void)
+{
+	return false;
+}
+
+static inline int qpnp_pon_modem_pwr_off(enum pon_power_off_type type)
+{
+	return -ENODEV;
+}
+
+#endif
+
+#endif