Commit ba0f3214 authored by Furquan Shaikh's avatar Furquan Shaikh Committed by Dmitry Torokhov
Browse files

Input: cros_ec_keyb - handle x86 detachable/convertible Chromebooks 



Some detachable/convertible x86 Chromebooks use EC buttons/switches
interface to signal volume up/down and other buttons. This configuration is
signalled via presence of GOOG0007 ACPI device. The main keyboard on such
Chromebooks is still using the standard 8042/atkbd combo.

Signed-off-by: default avatarFurquan Shaikh <furquan@chromium.org>
Reviewed-by: default avatarStephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20220526231230.2805147-2-dmitry.torokhov@gmail.com


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 91c77b5f

drivers/input/keyboard/cros_ec_keyb.c

+18 −3
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
// expensive.



#include <linux/module.h>

#include <linux/acpi.h>

#include <linux/bitops.h>

#include <linux/i2c.h>

#include <linux/input.h>
@@ -677,14 +678,19 @@ static const struct attribute_group cros_ec_keyb_attr_group = { 


static int cros_ec_keyb_probe(struct platform_device *pdev)

{

	struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);

	struct cros_ec_device *ec;

	struct device *dev = &pdev->dev;

	struct cros_ec_keyb *ckdev;

	bool buttons_switches_only = device_get_match_data(dev);

	int err;



	if (!dev->of_node)

		return -ENODEV;

	/*

	 * If the parent ec device has not been probed yet, defer the probe of

	 * this keyboard/button driver until later.

	 */

	ec = dev_get_drvdata(pdev->dev.parent);

	if (!ec)

		return -EPROBE_DEFER;



	ckdev = devm_kzalloc(dev, sizeof(*ckdev), GFP_KERNEL);

	if (!ckdev)
@@ -737,6 +743,14 @@ static int cros_ec_keyb_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_ACPI

static const struct acpi_device_id cros_ec_keyb_acpi_match[] = {

	{ "GOOG0007", true },

	{ }

};

MODULE_DEVICE_TABLE(acpi, cros_ec_keyb_acpi_match);

#endif



#ifdef CONFIG_OF

static const struct of_device_id cros_ec_keyb_of_match[] = {

	{ .compatible = "google,cros-ec-keyb" },
@@ -754,6 +768,7 @@ static struct platform_driver cros_ec_keyb_driver = { 
	.driver = {

		.name = "cros-ec-keyb",

		.of_match_table = of_match_ptr(cros_ec_keyb_of_match),

		.acpi_match_table = ACPI_PTR(cros_ec_keyb_acpi_match),

		.pm = &cros_ec_keyb_pm_ops,

	},

};