Merge branch 'for-5.12/i2c-hid' into for-linus
- ACPI and OF support made more generic / decoupled. From Douglas Anderson - support for Goodix devices from Douglas Andersonmaster
Jiri Kosina
commit
27b730e088
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@ -0,0 +1,65 @@
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/input/goodix,gt7375p.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Goodix GT7375P touchscreen
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maintainers:
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- Douglas Anderson <dianders@chromium.org>
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description:
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Supports the Goodix GT7375P touchscreen.
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This touchscreen uses the i2c-hid protocol but has some non-standard
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power sequencing required.
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properties:
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compatible:
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items:
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- const: goodix,gt7375p
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reg:
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enum:
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- 0x5d
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- 0x14
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interrupts:
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maxItems: 1
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reset-gpios:
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true
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vdd-supply:
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description: The 3.3V supply to the touchscreen.
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required:
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- compatible
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- reg
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- interrupts
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- reset-gpios
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- vdd-supply
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/qcom,rpmh.h>
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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ap_ts: touchscreen@5d {
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compatible = "goodix,gt7375p";
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reg = <0x5d>;
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interrupt-parent = <&tlmm>;
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interrupts = <9 IRQ_TYPE_LEVEL_LOW>;
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reset-gpios = <&tlmm 8 GPIO_ACTIVE_LOW>;
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vdd-supply = <&pp3300_ts>;
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};
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};
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@ -749,7 +749,8 @@ CONFIG_SND_SOC_WM8904=m
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CONFIG_SND_SOC_WSA881X=m
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CONFIG_SND_SIMPLE_CARD=m
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CONFIG_SND_AUDIO_GRAPH_CARD=m
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CONFIG_I2C_HID=m
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CONFIG_I2C_HID_ACPI=m
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CONFIG_I2C_HID_OF=m
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CONFIG_USB_CONN_GPIO=m
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CONFIG_USB=y
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CONFIG_USB_OTG=y
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@ -138,7 +138,7 @@ obj-$(CONFIG_USB_HID) += usbhid/
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obj-$(CONFIG_USB_MOUSE) += usbhid/
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obj-$(CONFIG_USB_KBD) += usbhid/
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obj-$(CONFIG_I2C_HID) += i2c-hid/
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obj-$(CONFIG_I2C_HID_CORE) += i2c-hid/
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obj-$(CONFIG_INTEL_ISH_HID) += intel-ish-hid/
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obj-$(INTEL_ISH_FIRMWARE_DOWNLOADER) += intel-ish-hid/
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@ -2,18 +2,55 @@
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menu "I2C HID support"
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depends on I2C
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config I2C_HID
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tristate "HID over I2C transport layer"
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config I2C_HID_ACPI
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tristate "HID over I2C transport layer ACPI driver"
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default n
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depends on I2C && INPUT
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select HID
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depends on I2C && INPUT && ACPI
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help
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Say Y here if you use a keyboard, a touchpad, a touchscreen, or any
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other HID based devices which is connected to your computer via I2C.
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This driver supports ACPI-based systems.
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If unsure, say N.
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This support is also available as a module. If so, the module
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will be called i2c-hid.
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will be called i2c-hid-acpi. It will also build/depend on the
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module i2c-hid.
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config I2C_HID_OF
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tristate "HID over I2C transport layer Open Firmware driver"
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default n
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depends on I2C && INPUT && OF
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help
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Say Y here if you use a keyboard, a touchpad, a touchscreen, or any
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other HID based devices which is connected to your computer via I2C.
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This driver supports Open Firmware (Device Tree)-based systems.
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If unsure, say N.
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This support is also available as a module. If so, the module
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will be called i2c-hid-of. It will also build/depend on the
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module i2c-hid.
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config I2C_HID_OF_GOODIX
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tristate "Driver for Goodix hid-i2c based devices on OF systems"
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default n
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depends on I2C && INPUT && OF
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help
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Say Y here if you want support for Goodix i2c devices that use
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the i2c-hid protocol on Open Firmware (Device Tree)-based
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systems.
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If unsure, say N.
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This support is also available as a module. If so, the module
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will be called i2c-hid-of-goodix. It will also build/depend on
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the module i2c-hid.
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endmenu
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config I2C_HID_CORE
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tristate
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default y if I2C_HID_ACPI=y || I2C_HID_OF=y || I2C_HID_OF_GOODIX=y
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default m if I2C_HID_ACPI=m || I2C_HID_OF=m || I2C_HID_OF_GOODIX=m
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select HID
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@ -3,7 +3,11 @@
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# Makefile for the I2C input drivers
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#
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obj-$(CONFIG_I2C_HID) += i2c-hid.o
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obj-$(CONFIG_I2C_HID_CORE) += i2c-hid.o
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i2c-hid-objs = i2c-hid-core.o
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i2c-hid-$(CONFIG_DMI) += i2c-hid-dmi-quirks.o
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obj-$(CONFIG_I2C_HID_ACPI) += i2c-hid-acpi.o
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obj-$(CONFIG_I2C_HID_OF) += i2c-hid-of.o
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obj-$(CONFIG_I2C_HID_OF_GOODIX) += i2c-hid-of-goodix.o
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@ -0,0 +1,143 @@
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/*
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* HID over I2C ACPI Subclass
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*
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* Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
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* Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France
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* Copyright (c) 2012 Red Hat, Inc
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*
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* This code was forked out of the core code, which was partly based on
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* "USB HID support for Linux":
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*
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* Copyright (c) 1999 Andreas Gal
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* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
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* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
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* Copyright (c) 2007-2008 Oliver Neukum
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* Copyright (c) 2006-2010 Jiri Kosina
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/acpi.h>
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#include <linux/device.h>
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#include <linux/i2c.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pm.h>
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#include "i2c-hid.h"
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struct i2c_hid_acpi {
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struct i2chid_ops ops;
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struct i2c_client *client;
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};
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static const struct acpi_device_id i2c_hid_acpi_blacklist[] = {
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/*
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* The CHPN0001 ACPI device, which is used to describe the Chipone
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* ICN8505 controller, has a _CID of PNP0C50 but is not HID compatible.
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*/
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{"CHPN0001", 0 },
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{ },
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};
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static int i2c_hid_acpi_get_descriptor(struct i2c_client *client)
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{
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static guid_t i2c_hid_guid =
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GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555,
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0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE);
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union acpi_object *obj;
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struct acpi_device *adev;
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acpi_handle handle;
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u16 hid_descriptor_address;
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handle = ACPI_HANDLE(&client->dev);
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if (!handle || acpi_bus_get_device(handle, &adev)) {
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dev_err(&client->dev, "Error could not get ACPI device\n");
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return -ENODEV;
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}
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if (acpi_match_device_ids(adev, i2c_hid_acpi_blacklist) == 0)
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return -ENODEV;
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obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL,
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ACPI_TYPE_INTEGER);
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if (!obj) {
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dev_err(&client->dev, "Error _DSM call to get HID descriptor address failed\n");
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return -ENODEV;
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}
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hid_descriptor_address = obj->integer.value;
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ACPI_FREE(obj);
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return hid_descriptor_address;
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}
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static void i2c_hid_acpi_shutdown_tail(struct i2chid_ops *ops)
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{
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struct i2c_hid_acpi *ihid_acpi =
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container_of(ops, struct i2c_hid_acpi, ops);
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struct device *dev = &ihid_acpi->client->dev;
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acpi_device_set_power(ACPI_COMPANION(dev), ACPI_STATE_D3_COLD);
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}
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static int i2c_hid_acpi_probe(struct i2c_client *client,
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const struct i2c_device_id *dev_id)
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{
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struct device *dev = &client->dev;
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struct i2c_hid_acpi *ihid_acpi;
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struct acpi_device *adev;
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u16 hid_descriptor_address;
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int ret;
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ihid_acpi = devm_kzalloc(&client->dev, sizeof(*ihid_acpi), GFP_KERNEL);
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if (!ihid_acpi)
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return -ENOMEM;
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ihid_acpi->client = client;
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ihid_acpi->ops.shutdown_tail = i2c_hid_acpi_shutdown_tail;
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ret = i2c_hid_acpi_get_descriptor(client);
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if (ret < 0)
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return ret;
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hid_descriptor_address = ret;
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adev = ACPI_COMPANION(dev);
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if (adev)
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acpi_device_fix_up_power(adev);
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if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) {
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device_set_wakeup_capable(dev, true);
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device_set_wakeup_enable(dev, false);
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}
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return i2c_hid_core_probe(client, &ihid_acpi->ops,
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hid_descriptor_address);
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}
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static const struct acpi_device_id i2c_hid_acpi_match[] = {
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{"ACPI0C50", 0 },
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{"PNP0C50", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(acpi, i2c_hid_acpi_match);
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static struct i2c_driver i2c_hid_acpi_driver = {
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.driver = {
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.name = "i2c_hid_acpi",
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.pm = &i2c_hid_core_pm,
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.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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.acpi_match_table = ACPI_PTR(i2c_hid_acpi_match),
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},
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.probe = i2c_hid_acpi_probe,
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.remove = i2c_hid_core_remove,
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.shutdown = i2c_hid_core_shutdown,
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};
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module_i2c_driver(i2c_hid_acpi_driver);
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MODULE_DESCRIPTION("HID over I2C ACPI driver");
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MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
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MODULE_LICENSE("GPL");
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@ -35,11 +35,6 @@
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#include <linux/kernel.h>
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#include <linux/hid.h>
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#include <linux/mutex.h>
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#include <linux/acpi.h>
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#include <linux/of.h>
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#include <linux/regulator/consumer.h>
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#include <linux/platform_data/i2c-hid.h>
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#include "../hid-ids.h"
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#include "i2c-hid.h"
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|
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@ -156,10 +151,10 @@ struct i2c_hid {
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|
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wait_queue_head_t wait; /* For waiting the interrupt */
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struct i2c_hid_platform_data pdata;
|
||||
|
||||
bool irq_wake_enabled;
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struct mutex reset_lock;
|
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|
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struct i2chid_ops *ops;
|
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};
|
||||
|
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static const struct i2c_hid_quirks {
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@ -886,144 +881,36 @@ static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid)
|
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return 0;
|
||||
}
|
||||
|
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#ifdef CONFIG_ACPI
|
||||
static const struct acpi_device_id i2c_hid_acpi_blacklist[] = {
|
||||
/*
|
||||
* The CHPN0001 ACPI device, which is used to describe the Chipone
|
||||
* ICN8505 controller, has a _CID of PNP0C50 but is not HID compatible.
|
||||
*/
|
||||
{"CHPN0001", 0 },
|
||||
{ },
|
||||
};
|
||||
|
||||
static int i2c_hid_acpi_pdata(struct i2c_client *client,
|
||||
struct i2c_hid_platform_data *pdata)
|
||||
static int i2c_hid_core_power_up(struct i2c_hid *ihid)
|
||||
{
|
||||
static guid_t i2c_hid_guid =
|
||||
GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555,
|
||||
0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE);
|
||||
union acpi_object *obj;
|
||||
struct acpi_device *adev;
|
||||
acpi_handle handle;
|
||||
if (!ihid->ops->power_up)
|
||||
return 0;
|
||||
|
||||
handle = ACPI_HANDLE(&client->dev);
|
||||
if (!handle || acpi_bus_get_device(handle, &adev)) {
|
||||
dev_err(&client->dev, "Error could not get ACPI device\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (acpi_match_device_ids(adev, i2c_hid_acpi_blacklist) == 0)
|
||||
return -ENODEV;
|
||||
|
||||
obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL,
|
||||
ACPI_TYPE_INTEGER);
|
||||
if (!obj) {
|
||||
dev_err(&client->dev, "Error _DSM call to get HID descriptor address failed\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
pdata->hid_descriptor_address = obj->integer.value;
|
||||
ACPI_FREE(obj);
|
||||
|
||||
return 0;
|
||||
return ihid->ops->power_up(ihid->ops);
|
||||
}
|
||||
|
||||
static void i2c_hid_acpi_fix_up_power(struct device *dev)
|
||||
static void i2c_hid_core_power_down(struct i2c_hid *ihid)
|
||||
{
|
||||
struct acpi_device *adev;
|
||||
if (!ihid->ops->power_down)
|
||||
return;
|
||||
|
||||
adev = ACPI_COMPANION(dev);
|
||||
if (adev)
|
||||
acpi_device_fix_up_power(adev);
|
||||
ihid->ops->power_down(ihid->ops);
|
||||
}
|
||||
|
||||
static void i2c_hid_acpi_enable_wakeup(struct device *dev)
|
||||
static void i2c_hid_core_shutdown_tail(struct i2c_hid *ihid)
|
||||
{
|
||||
if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) {
|
||||
device_set_wakeup_capable(dev, true);
|
||||
device_set_wakeup_enable(dev, false);
|
||||
}
|
||||
if (!ihid->ops->shutdown_tail)
|
||||
return;
|
||||
|
||||
ihid->ops->shutdown_tail(ihid->ops);
|
||||
}
|
||||
|
||||
static void i2c_hid_acpi_shutdown(struct device *dev)
|
||||
{
|
||||
acpi_device_set_power(ACPI_COMPANION(dev), ACPI_STATE_D3_COLD);
|
||||
}
|
||||
|
||||
static const struct acpi_device_id i2c_hid_acpi_match[] = {
|
||||
{"ACPI0C50", 0 },
|
||||
{"PNP0C50", 0 },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(acpi, i2c_hid_acpi_match);
|
||||
#else
|
||||
static inline int i2c_hid_acpi_pdata(struct i2c_client *client,
|
||||
struct i2c_hid_platform_data *pdata)
|
||||
{
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
static inline void i2c_hid_acpi_fix_up_power(struct device *dev) {}
|
||||
|
||||
static inline void i2c_hid_acpi_enable_wakeup(struct device *dev) {}
|
||||
|
||||
static inline void i2c_hid_acpi_shutdown(struct device *dev) {}
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static int i2c_hid_of_probe(struct i2c_client *client,
|
||||
struct i2c_hid_platform_data *pdata)
|
||||
{
|
||||
struct device *dev = &client->dev;
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
ret = of_property_read_u32(dev->of_node, "hid-descr-addr", &val);
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "HID register address not provided\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
if (val >> 16) {
|
||||
dev_err(&client->dev, "Bad HID register address: 0x%08x\n",
|
||||
val);
|
||||
return -EINVAL;
|
||||
}
|
||||
pdata->hid_descriptor_address = val;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id i2c_hid_of_match[] = {
|
||||
{ .compatible = "hid-over-i2c" },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, i2c_hid_of_match);
|
||||
#else
|
||||
static inline int i2c_hid_of_probe(struct i2c_client *client,
|
||||
struct i2c_hid_platform_data *pdata)
|
||||
{
|
||||
return -ENODEV;
|
||||
}
|
||||
#endif
|
||||
|
||||
static void i2c_hid_fwnode_probe(struct i2c_client *client,
|
||||
struct i2c_hid_platform_data *pdata)
|
||||
{
|
||||
u32 val;
|
||||
|
||||
if (!device_property_read_u32(&client->dev, "post-power-on-delay-ms",
|
||||
&val))
|
||||
pdata->post_power_delay_ms = val;
|
||||
}
|
||||
|
||||
static int i2c_hid_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *dev_id)
|
||||
int i2c_hid_core_probe(struct i2c_client *client, struct i2chid_ops *ops,
|
||||
u16 hid_descriptor_address)
|
||||
{
|
||||
int ret;
|
||||
struct i2c_hid *ihid;
|
||||
struct hid_device *hid;
|
||||
__u16 hidRegister;
|
||||
struct i2c_hid_platform_data *platform_data = client->dev.platform_data;
|
||||
|
||||
dbg_hid("HID probe called for i2c 0x%02x\n", client->addr);
|
||||
|
||||
|
|
@ -1044,44 +931,17 @@ static int i2c_hid_probe(struct i2c_client *client,
|
|||
if (!ihid)
|
||||
return -ENOMEM;
|
||||
|
||||
if (client->dev.of_node) {
|
||||
ret = i2c_hid_of_probe(client, &ihid->pdata);
|
||||
if (ret)
|
||||
return ret;
|
||||
} else if (!platform_data) {
|
||||
ret = i2c_hid_acpi_pdata(client, &ihid->pdata);
|
||||
if (ret)
|
||||
return ret;
|
||||
} else {
|
||||
ihid->pdata = *platform_data;
|
||||
}
|
||||
ihid->ops = ops;
|
||||
|
||||
/* Parse platform agnostic common properties from ACPI / device tree */
|
||||
i2c_hid_fwnode_probe(client, &ihid->pdata);
|
||||
|
||||
ihid->pdata.supplies[0].supply = "vdd";
|
||||
ihid->pdata.supplies[1].supply = "vddl";
|
||||
|
||||
ret = devm_regulator_bulk_get(&client->dev,
|
||||
ARRAY_SIZE(ihid->pdata.supplies),
|
||||
ihid->pdata.supplies);
|
||||
ret = i2c_hid_core_power_up(ihid);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = regulator_bulk_enable(ARRAY_SIZE(ihid->pdata.supplies),
|
||||
ihid->pdata.supplies);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
if (ihid->pdata.post_power_delay_ms)
|
||||
msleep(ihid->pdata.post_power_delay_ms);
|
||||
|
||||
i2c_set_clientdata(client, ihid);
|
||||
|
||||
ihid->client = client;
|
||||
|
||||
hidRegister = ihid->pdata.hid_descriptor_address;
|
||||
ihid->wHIDDescRegister = cpu_to_le16(hidRegister);
|
||||
ihid->wHIDDescRegister = cpu_to_le16(hid_descriptor_address);
|
||||
|
||||
init_waitqueue_head(&ihid->wait);
|
||||
mutex_init(&ihid->reset_lock);
|
||||
|
|
@ -1091,11 +951,7 @@ static int i2c_hid_probe(struct i2c_client *client,
|
|||
* real computation later. */
|
||||
ret = i2c_hid_alloc_buffers(ihid, HID_MIN_BUFFER_SIZE);
|
||||
if (ret < 0)
|
||||
goto err_regulator;
|
||||
|
||||
i2c_hid_acpi_fix_up_power(&client->dev);
|
||||
|
||||
i2c_hid_acpi_enable_wakeup(&client->dev);
|
||||
goto err_powered;
|
||||
|
||||
device_enable_async_suspend(&client->dev);
|
||||
|
||||
|
|
@ -1104,19 +960,19 @@ static int i2c_hid_probe(struct i2c_client *client,
|
|||
if (ret < 0) {
|
||||
dev_dbg(&client->dev, "nothing at this address: %d\n", ret);
|
||||
ret = -ENXIO;
|
||||
goto err_regulator;
|
||||
goto err_powered;
|
||||
}
|
||||
|
||||
ret = i2c_hid_fetch_hid_descriptor(ihid);
|
||||
if (ret < 0) {
|
||||
dev_err(&client->dev,
|
||||
"Failed to fetch the HID Descriptor\n");
|
||||
goto err_regulator;
|
||||
goto err_powered;
|
||||
}
|
||||
|
||||
ret = i2c_hid_init_irq(client);
|
||||
if (ret < 0)
|
||||
goto err_regulator;
|
||||
goto err_powered;
|
||||
|
||||
hid = hid_allocate_device();
|
||||
if (IS_ERR(hid)) {
|
||||
|
|
@ -1155,14 +1011,14 @@ err_mem_free:
|
|||
err_irq:
|
||||
free_irq(client->irq, ihid);
|
||||
|
||||
err_regulator:
|
||||
regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies),
|
||||
ihid->pdata.supplies);
|
||||
err_powered:
|
||||
i2c_hid_core_power_down(ihid);
|
||||
i2c_hid_free_buffers(ihid);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(i2c_hid_core_probe);
|
||||
|
||||
static int i2c_hid_remove(struct i2c_client *client)
|
||||
int i2c_hid_core_remove(struct i2c_client *client)
|
||||
{
|
||||
struct i2c_hid *ihid = i2c_get_clientdata(client);
|
||||
struct hid_device *hid;
|
||||
|
|
@ -1175,24 +1031,25 @@ static int i2c_hid_remove(struct i2c_client *client)
|
|||
if (ihid->bufsize)
|
||||
i2c_hid_free_buffers(ihid);
|
||||
|
||||
regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies),
|
||||
ihid->pdata.supplies);
|
||||
i2c_hid_core_power_down(ihid);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(i2c_hid_core_remove);
|
||||
|
||||
static void i2c_hid_shutdown(struct i2c_client *client)
|
||||
void i2c_hid_core_shutdown(struct i2c_client *client)
|
||||
{
|
||||
struct i2c_hid *ihid = i2c_get_clientdata(client);
|
||||
|
||||
i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
|
||||
free_irq(client->irq, ihid);
|
||||
|
||||
i2c_hid_acpi_shutdown(&client->dev);
|
||||
i2c_hid_core_shutdown_tail(ihid);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(i2c_hid_core_shutdown);
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int i2c_hid_suspend(struct device *dev)
|
||||
static int i2c_hid_core_suspend(struct device *dev)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
struct i2c_hid *ihid = i2c_get_clientdata(client);
|
||||
|
|
@ -1219,14 +1076,13 @@ static int i2c_hid_suspend(struct device *dev)
|
|||
hid_warn(hid, "Failed to enable irq wake: %d\n",
|
||||
wake_status);
|
||||
} else {
|
||||
regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies),
|
||||
ihid->pdata.supplies);
|
||||
i2c_hid_core_power_down(ihid);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int i2c_hid_resume(struct device *dev)
|
||||
static int i2c_hid_core_resume(struct device *dev)
|
||||
{
|
||||
int ret;
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
|
|
@ -1235,13 +1091,7 @@ static int i2c_hid_resume(struct device *dev)
|
|||
int wake_status;
|
||||
|
||||
if (!device_may_wakeup(&client->dev)) {
|
||||
ret = regulator_bulk_enable(ARRAY_SIZE(ihid->pdata.supplies),
|
||||
ihid->pdata.supplies);
|
||||
if (ret)
|
||||
hid_warn(hid, "Failed to enable supplies: %d\n", ret);
|
||||
|
||||
if (ihid->pdata.post_power_delay_ms)
|
||||
msleep(ihid->pdata.post_power_delay_ms);
|
||||
i2c_hid_core_power_up(ihid);
|
||||
} else if (ihid->irq_wake_enabled) {
|
||||
wake_status = disable_irq_wake(client->irq);
|
||||
if (!wake_status)
|
||||
|
|
@ -1278,34 +1128,10 @@ static int i2c_hid_resume(struct device *dev)
|
|||
}
|
||||
#endif
|
||||
|
||||
static const struct dev_pm_ops i2c_hid_pm = {
|
||||
SET_SYSTEM_SLEEP_PM_OPS(i2c_hid_suspend, i2c_hid_resume)
|
||||
const struct dev_pm_ops i2c_hid_core_pm = {
|
||||
SET_SYSTEM_SLEEP_PM_OPS(i2c_hid_core_suspend, i2c_hid_core_resume)
|
||||
};
|
||||
|
||||
static const struct i2c_device_id i2c_hid_id_table[] = {
|
||||
{ "hid", 0 },
|
||||
{ "hid-over-i2c", 0 },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, i2c_hid_id_table);
|
||||
|
||||
|
||||
static struct i2c_driver i2c_hid_driver = {
|
||||
.driver = {
|
||||
.name = "i2c_hid",
|
||||
.pm = &i2c_hid_pm,
|
||||
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
||||
.acpi_match_table = ACPI_PTR(i2c_hid_acpi_match),
|
||||
.of_match_table = of_match_ptr(i2c_hid_of_match),
|
||||
},
|
||||
|
||||
.probe = i2c_hid_probe,
|
||||
.remove = i2c_hid_remove,
|
||||
.shutdown = i2c_hid_shutdown,
|
||||
.id_table = i2c_hid_id_table,
|
||||
};
|
||||
|
||||
module_i2c_driver(i2c_hid_driver);
|
||||
EXPORT_SYMBOL_GPL(i2c_hid_core_pm);
|
||||
|
||||
MODULE_DESCRIPTION("HID over I2C core driver");
|
||||
MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
|
||||
|
|
|
|||
|
|
@ -0,0 +1,116 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* Driver for Goodix touchscreens that use the i2c-hid protocol.
|
||||
*
|
||||
* Copyright 2020 Google LLC
|
||||
*/
|
||||
|
||||
#include <linux/delay.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/gpio/consumer.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/pm.h>
|
||||
#include <linux/regulator/consumer.h>
|
||||
|
||||
#include "i2c-hid.h"
|
||||
|
||||
struct goodix_i2c_hid_timing_data {
|
||||
unsigned int post_gpio_reset_delay_ms;
|
||||
unsigned int post_power_delay_ms;
|
||||
};
|
||||
|
||||
struct i2c_hid_of_goodix {
|
||||
struct i2chid_ops ops;
|
||||
|
||||
struct regulator *vdd;
|
||||
struct gpio_desc *reset_gpio;
|
||||
const struct goodix_i2c_hid_timing_data *timings;
|
||||
};
|
||||
|
||||
static int goodix_i2c_hid_power_up(struct i2chid_ops *ops)
|
||||
{
|
||||
struct i2c_hid_of_goodix *ihid_goodix =
|
||||
container_of(ops, struct i2c_hid_of_goodix, ops);
|
||||
int ret;
|
||||
|
||||
ret = regulator_enable(ihid_goodix->vdd);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (ihid_goodix->timings->post_power_delay_ms)
|
||||
msleep(ihid_goodix->timings->post_power_delay_ms);
|
||||
|
||||
gpiod_set_value_cansleep(ihid_goodix->reset_gpio, 0);
|
||||
if (ihid_goodix->timings->post_gpio_reset_delay_ms)
|
||||
msleep(ihid_goodix->timings->post_gpio_reset_delay_ms);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void goodix_i2c_hid_power_down(struct i2chid_ops *ops)
|
||||
{
|
||||
struct i2c_hid_of_goodix *ihid_goodix =
|
||||
container_of(ops, struct i2c_hid_of_goodix, ops);
|
||||
|
||||
gpiod_set_value_cansleep(ihid_goodix->reset_gpio, 1);
|
||||
regulator_disable(ihid_goodix->vdd);
|
||||
}
|
||||
|
||||
static int i2c_hid_of_goodix_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct i2c_hid_of_goodix *ihid_goodix;
|
||||
|
||||
ihid_goodix = devm_kzalloc(&client->dev, sizeof(*ihid_goodix),
|
||||
GFP_KERNEL);
|
||||
if (!ihid_goodix)
|
||||
return -ENOMEM;
|
||||
|
||||
ihid_goodix->ops.power_up = goodix_i2c_hid_power_up;
|
||||
ihid_goodix->ops.power_down = goodix_i2c_hid_power_down;
|
||||
|
||||
/* Start out with reset asserted */
|
||||
ihid_goodix->reset_gpio =
|
||||
devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(ihid_goodix->reset_gpio))
|
||||
return PTR_ERR(ihid_goodix->reset_gpio);
|
||||
|
||||
ihid_goodix->vdd = devm_regulator_get(&client->dev, "vdd");
|
||||
if (IS_ERR(ihid_goodix->vdd))
|
||||
return PTR_ERR(ihid_goodix->vdd);
|
||||
|
||||
ihid_goodix->timings = device_get_match_data(&client->dev);
|
||||
|
||||
return i2c_hid_core_probe(client, &ihid_goodix->ops, 0x0001);
|
||||
}
|
||||
|
||||
static const struct goodix_i2c_hid_timing_data goodix_gt7375p_timing_data = {
|
||||
.post_power_delay_ms = 10,
|
||||
.post_gpio_reset_delay_ms = 180,
|
||||
};
|
||||
|
||||
static const struct of_device_id goodix_i2c_hid_of_match[] = {
|
||||
{ .compatible = "goodix,gt7375p", .data = &goodix_gt7375p_timing_data },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, goodix_i2c_hid_of_match);
|
||||
|
||||
static struct i2c_driver goodix_i2c_hid_ts_driver = {
|
||||
.driver = {
|
||||
.name = "i2c_hid_of_goodix",
|
||||
.pm = &i2c_hid_core_pm,
|
||||
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
||||
.of_match_table = of_match_ptr(goodix_i2c_hid_of_match),
|
||||
},
|
||||
.probe = i2c_hid_of_goodix_probe,
|
||||
.remove = i2c_hid_core_remove,
|
||||
.shutdown = i2c_hid_core_shutdown,
|
||||
};
|
||||
module_i2c_driver(goodix_i2c_hid_ts_driver);
|
||||
|
||||
MODULE_AUTHOR("Douglas Anderson <dianders@chromium.org>");
|
||||
MODULE_DESCRIPTION("Goodix i2c-hid touchscreen driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
|
@ -0,0 +1,143 @@
|
|||
/*
|
||||
* HID over I2C Open Firmware Subclass
|
||||
*
|
||||
* Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
|
||||
* Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France
|
||||
* Copyright (c) 2012 Red Hat, Inc
|
||||
*
|
||||
* This code was forked out of the core code, which was partly based on
|
||||
* "USB HID support for Linux":
|
||||
*
|
||||
* Copyright (c) 1999 Andreas Gal
|
||||
* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
|
||||
* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
|
||||
* Copyright (c) 2007-2008 Oliver Neukum
|
||||
* Copyright (c) 2006-2010 Jiri Kosina
|
||||
*
|
||||
* This file is subject to the terms and conditions of the GNU General Public
|
||||
* License. See the file COPYING in the main directory of this archive for
|
||||
* more details.
|
||||
*/
|
||||
|
||||
#include <linux/delay.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/pm.h>
|
||||
#include <linux/regulator/consumer.h>
|
||||
|
||||
#include "i2c-hid.h"
|
||||
|
||||
struct i2c_hid_of {
|
||||
struct i2chid_ops ops;
|
||||
|
||||
struct i2c_client *client;
|
||||
struct regulator_bulk_data supplies[2];
|
||||
int post_power_delay_ms;
|
||||
};
|
||||
|
||||
static int i2c_hid_of_power_up(struct i2chid_ops *ops)
|
||||
{
|
||||
struct i2c_hid_of *ihid_of = container_of(ops, struct i2c_hid_of, ops);
|
||||
struct device *dev = &ihid_of->client->dev;
|
||||
int ret;
|
||||
|
||||
ret = regulator_bulk_enable(ARRAY_SIZE(ihid_of->supplies),
|
||||
ihid_of->supplies);
|
||||
if (ret) {
|
||||
dev_warn(dev, "Failed to enable supplies: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (ihid_of->post_power_delay_ms)
|
||||
msleep(ihid_of->post_power_delay_ms);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void i2c_hid_of_power_down(struct i2chid_ops *ops)
|
||||
{
|
||||
struct i2c_hid_of *ihid_of = container_of(ops, struct i2c_hid_of, ops);
|
||||
|
||||
regulator_bulk_disable(ARRAY_SIZE(ihid_of->supplies),
|
||||
ihid_of->supplies);
|
||||
}
|
||||
|
||||
static int i2c_hid_of_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *dev_id)
|
||||
{
|
||||
struct device *dev = &client->dev;
|
||||
struct i2c_hid_of *ihid_of;
|
||||
u16 hid_descriptor_address;
|
||||
int ret;
|
||||
u32 val;
|
||||
|
||||
ihid_of = devm_kzalloc(&client->dev, sizeof(*ihid_of), GFP_KERNEL);
|
||||
if (!ihid_of)
|
||||
return -ENOMEM;
|
||||
|
||||
ihid_of->ops.power_up = i2c_hid_of_power_up;
|
||||
ihid_of->ops.power_down = i2c_hid_of_power_down;
|
||||
|
||||
ret = of_property_read_u32(dev->of_node, "hid-descr-addr", &val);
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "HID register address not provided\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
if (val >> 16) {
|
||||
dev_err(&client->dev, "Bad HID register address: 0x%08x\n",
|
||||
val);
|
||||
return -EINVAL;
|
||||
}
|
||||
hid_descriptor_address = val;
|
||||
|
||||
if (!device_property_read_u32(&client->dev, "post-power-on-delay-ms",
|
||||
&val))
|
||||
ihid_of->post_power_delay_ms = val;
|
||||
|
||||
ihid_of->supplies[0].supply = "vdd";
|
||||
ihid_of->supplies[1].supply = "vddl";
|
||||
ret = devm_regulator_bulk_get(&client->dev,
|
||||
ARRAY_SIZE(ihid_of->supplies),
|
||||
ihid_of->supplies);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return i2c_hid_core_probe(client, &ihid_of->ops,
|
||||
hid_descriptor_address);
|
||||
}
|
||||
|
||||
static const struct of_device_id i2c_hid_of_match[] = {
|
||||
{ .compatible = "hid-over-i2c" },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, i2c_hid_of_match);
|
||||
|
||||
static const struct i2c_device_id i2c_hid_of_id_table[] = {
|
||||
{ "hid", 0 },
|
||||
{ "hid-over-i2c", 0 },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, i2c_hid_of_id_table);
|
||||
|
||||
static struct i2c_driver i2c_hid_of_driver = {
|
||||
.driver = {
|
||||
.name = "i2c_hid_of",
|
||||
.pm = &i2c_hid_core_pm,
|
||||
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
||||
.of_match_table = of_match_ptr(i2c_hid_of_match),
|
||||
},
|
||||
|
||||
.probe = i2c_hid_of_probe,
|
||||
.remove = i2c_hid_core_remove,
|
||||
.shutdown = i2c_hid_core_shutdown,
|
||||
.id_table = i2c_hid_of_id_table,
|
||||
};
|
||||
|
||||
module_i2c_driver(i2c_hid_of_driver);
|
||||
|
||||
MODULE_DESCRIPTION("HID over I2C OF driver");
|
||||
MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -3,6 +3,7 @@
|
|||
#ifndef I2C_HID_H
|
||||
#define I2C_HID_H
|
||||
|
||||
#include <linux/i2c.h>
|
||||
|
||||
#ifdef CONFIG_DMI
|
||||
struct i2c_hid_desc *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name);
|
||||
|
|
@ -17,4 +18,25 @@ static inline char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name,
|
|||
{ return NULL; }
|
||||
#endif
|
||||
|
||||
/**
|
||||
* struct i2chid_ops - Ops provided to the core.
|
||||
*
|
||||
* @power_up: do sequencing to power up the device.
|
||||
* @power_down: do sequencing to power down the device.
|
||||
* @shutdown_tail: called at the end of shutdown.
|
||||
*/
|
||||
struct i2chid_ops {
|
||||
int (*power_up)(struct i2chid_ops *ops);
|
||||
void (*power_down)(struct i2chid_ops *ops);
|
||||
void (*shutdown_tail)(struct i2chid_ops *ops);
|
||||
};
|
||||
|
||||
int i2c_hid_core_probe(struct i2c_client *client, struct i2chid_ops *ops,
|
||||
u16 hid_descriptor_address);
|
||||
int i2c_hid_core_remove(struct i2c_client *client);
|
||||
|
||||
void i2c_hid_core_shutdown(struct i2c_client *client);
|
||||
|
||||
extern const struct dev_pm_ops i2c_hid_core_pm;
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -1,41 +0,0 @@
|
|||
/*
|
||||
* HID over I2C protocol implementation
|
||||
*
|
||||
* Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
|
||||
* Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France
|
||||
*
|
||||
* This file is subject to the terms and conditions of the GNU General Public
|
||||
* License. See the file COPYING in the main directory of this archive for
|
||||
* more details.
|
||||
*/
|
||||
|
||||
#ifndef __LINUX_I2C_HID_H
|
||||
#define __LINUX_I2C_HID_H
|
||||
|
||||
#include <linux/regulator/consumer.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
/**
|
||||
* struct i2chid_platform_data - used by hid over i2c implementation.
|
||||
* @hid_descriptor_address: i2c register where the HID descriptor is stored.
|
||||
* @supplies: regulators for powering on the device.
|
||||
* @post_power_delay_ms: delay after powering on before device is usable.
|
||||
*
|
||||
* Note that it is the responsibility of the platform driver (or the acpi 5.0
|
||||
* driver, or the flattened device tree) to setup the irq related to the gpio in
|
||||
* the struct i2c_board_info.
|
||||
* The platform driver should also setup the gpio according to the device:
|
||||
*
|
||||
* A typical example is the following:
|
||||
* irq = gpio_to_irq(intr_gpio);
|
||||
* hkdk4412_i2c_devs5[0].irq = irq; // store the irq in i2c_board_info
|
||||
* gpio_request(intr_gpio, "elan-irq");
|
||||
* s3c_gpio_setpull(intr_gpio, S3C_GPIO_PULL_UP);
|
||||
*/
|
||||
struct i2c_hid_platform_data {
|
||||
u16 hid_descriptor_address;
|
||||
struct regulator_bulk_data supplies[2];
|
||||
int post_power_delay_ms;
|
||||
};
|
||||
|
||||
#endif /* __LINUX_I2C_HID_H */
|
||||
Loading…
Reference in New Issue