input: add snapshot of qpnp-power-on driver

Qualcomm QPNP power-on

The qpnp-power-on is a driver which supports the power-on(PON)

peripheral on Qualcomm PMICs. The supported functionality includes

power on/off reason, key press/release detection, PMIC reset configurations

and other PON specific features. The PON module supports multiple physical

power-on (KPDPWR_N, CBLPWR) and reset (KPDPWR_N, RESIN, KPDPWR+RESIN) sources.

This peripheral is connected to the host processor via the SPMI interface.

Required properties:

- compatible:	Must be "qcom,qpnp-power-on"

- reg:		Specifies the SPMI address and size for this PON (power-on)

		peripheral.

- interrupts:	Specifies the interrupt associated with PON.

- interrupt-names:	Specify the interrupt names associated with interrupts.

			Must be one of "kpdpwr", "kpdpwr-bark", "resin",

			"resin-bark", "cblpwr", "kpdpwr-resin-bark".Bark

			interrupts are associated with system reset

			configuration to allow default reset configuration to

			be activated. If system reset configuration is not

			supported then bark interrupts are nops. Additionally,

			the "pmic-wd-bark" interrupt can be added if the system

			needs to handle PMIC watch dog barks.

Optional properties:

- qcom,pon-dbc-delay		The debounce delay for the power-key interrupt

				specified in us.

				Possible values for GEN1 PON are:

				15625, 31250, 62500, 125000, 250000, 500000,

				1000000 and 2000000.

				Possible values for GEN2 PON are:

				62, 123, 245, 489, 977, 1954, 3907, 7813,

				15625, 31250, 62500, 125000 and 250000.

				Intermediate value is rounded down to the

				nearest valid value.

- qcom,pon_1 ...pon_n		These represent the child nodes which describe

				the properties (reset, key) for each of the pon

				reset source. All the child nodes are optional.

				If none of them is specified, the driver fails

				to register.

- qcom,system-reset		Specifies that this PON peripheral can be used

				to reset the system. This property can only be

				used by one device on the system. It is an

				error to include it more than once.

- qcom,s3-debounce		The debounce delay for stage3 reset trigger in

				secs. The values range from 0 to 128.

- qcom,s3-src			The source for stage 3 reset. It can be one of

				"kpdpwr", "resin", "kpdpwr-or-resin" or

				"kpdpwr-and-resin". The default value is

				"kpdpwr-and-resin".

- qcom,uvlo-panic		If this property is present, the device will

				set to panic during reboot if this reboot is

				due to under voltage lock out.

- qcom,clear-warm-reset		Specifies that the WARM_RESET reason registers

				need to be cleared for this target. The

				property is used for the targets which have a

				hardware feature to catch resets which aren't

				triggered by the MSM.

				In such cases clearing WARM_REASON registers

				across MSM resets keeps the registers in good

				state.

- qcom,secondary-pon-reset	Boolean property which indicates that the PON

				peripheral is a secondary PON device which

				needs to be configured during reset in addition

				to the primary PON device that is configured

				for system reset through qcom,system-reset

				property.

				This should not be defined along with the

				qcom,system-reset property.

- qcom,store-hard-reset-reason	Boolean property which if set will store the

				hardware reset reason to SOFT_RB_SPARE register

				of the core PMIC PON peripheral.

- qcom,warm-reset-poweroff-type	Poweroff type required to be configured on

				PS_HOLD reset control register when the system

				goes for warm reset. If this property is not

				specified, then the default type, warm reset

				will be configured to PS_HOLD reset control

				register.

- qcom,hard-reset-poweroff-type	Same description as qcom,warm-reset-poweroff-

				type but this applies for the system hard reset

				case.

- qcom,shutdown-poweroff-type	Same description as qcom,warm-reset-poweroff-

				type but this applies for the system shutdown

				case.

All the below properties are in the sub-node section (properties of the child

node).

Sub-nodes (if defined) should belong to either a PON configuration or a

regulator configuration.

Regulator sub-node required properties:

- regulator-name		Regulator name for the PON regulator that

				is being configured.

- qcom,pon-spare-reg-addr	Register offset from the base address of the

				PON peripheral that needs to be configured for

				the regulator being controlled.

- qcom,pon-spare-reg-bit	Bit position in the specified register that

				needs to be configured for the regulator being

				controlled.

PON sub-node required properties:

- qcom,pon-type			The type of PON/RESET source. The driver

				currently supports KPDPWR(0), RESIN(1) and

				CBLPWR(2) pon/reset sources.

PON sub-node optional properties:

- qcom,pull-up			The initial state of the reset pin under

				consideration.

				0 = No pull-up

				1 = pull-up enabled

				This property is set to '0' if not specified.

- qcom,support-reset		Indicates if this PON source supports

				reset functionality.

				0 = Not supported

				1 = Supported

				If this property is not defined, then do not

				modify S2 reset values.

- qcom,use-bark                 Specify if this pon type needs to handle bark

				irq.

- linux,code                    The input key-code associated with the reset

				source.

                                The reset source in its default configuration

				can be used to support standard keys.

The below mentioned properties are required only when qcom,support-reset DT

property is defined and is set to 1.

- qcom,s1-timer			The debounce timer for the BARK interrupt for

				that reset source. Value is specified in ms.

				Supported values are:

				- 0, 32, 56, 80, 128, 184, 272, 408, 608, 904

				  1352, 2048, 3072, 4480, 6720, 10256

- qcom,s2-timer			The debounce timer for the S2 reset specified

				in ms. On the expiry of this timer, the PMIC

				executes the reset sequence.

				Supported values are:

				- 0, 10, 50, 100, 250, 500, 1000, 2000

- qcom,s2-type			The type of reset associated with this source.

				The supported resets are:

				SOFT(0), WARM(1), SHUTDOWN(4), HARD(7)

Example:

	qcom,power-on@800 {

		compatible = "qcom,qpnp-power-on";

		reg = <0x800 0x100>;

		interrupts = <0x0 0x8 0x0>,

			     <0x0 0x8 0x1>,

			     <0x0 0x8 0x4>,

			     <0x0 0x8 0x5>;

		interrupt-names = "kpdpwr", "resin",

				"resin-bark", "kpdpwr-resin-bark";

		qcom,pon-dbc-delay = <15625>;

		qcom,system-reset;

		qcom,s3-debounce = <32>;

		qcom,s3-src = "resin";

		qcom,clear-warm-reset;

		qcom,store-hard-reset-reason;

		qcom,pon_1 {

			qcom,pon-type = <0>;

			qcom,pull-up = <1>;

			linux,code = <116>;

		};

		qcom,pon_2 {

			qcom,pon-type = <1>;

			qcom,support-reset = <1>;

			qcom,pull-up = <1>;

			qcom,s1-timer = <0>;

			qcom,s2-timer = <2000>;

			qcom,s2-type = <1>;

			linux,code = <114>;

			qcom,use-bark;

		};

		qcom,pon_3 {

			qcom,pon-type = <3>;

			qcom,support-reset = <1>;

			qcom,s1-timer = <6720>;

			qcom,s2-timer = <2000>;

			qcom,s2-type = <7>;

			qcom,pull-up = <1>;

			qcom,use-bark;

		};

	};

	qcom,power-on@800 {

		compatible = "qcom,qpnp-power-on";

		reg = <0x800 0x100>;

		qcom,secondary-pon-reset;

		qcom,hard-reset-poweroff-type = <PON_POWER_OFF_SHUTDOWN>;

		pon_perph_reg: qcom,pon_perph_reg {

			regulator-name = "pon_spare_reg";

			qcom,pon-spare-reg-addr = <0x8c>;

			qcom,pon-spare-reg-bit = <1>;

		};

	};

	  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

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_RB532_BUTTON)	+= rb532_button.o

/* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.

/* Copyright (c) 2013-2017, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

#include <linux/reboot.h>

#include <linux/pm.h>

#include <linux/delay.h>

#include <linux/qpnp/power-on.h>

#include <linux/input/qpnp-power-on.h>

#include <linux/of_address.h>

#include <asm/cacheflush.h>