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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: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20220526231230.2805147-2-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Furquan Shaikh 2022-05-27 21:41:41 -07:00 committed by Dmitry Torokhov
parent 91c77b5fdf
commit ba0f32141b
1 changed files with 18 additions and 3 deletions
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21
drivers/input/keyboard/cros_ec_keyb.c
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@ -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,
},
};