From: Hans de Goede <hdegoede@redhat.com>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Bastien Nocera <hadess@hadess.net>
Cc: Hans de Goede <hdegoede@redhat.com>,
linux-input@vger.kernel.org, Dmitry Mastykin <mastichi@gmail.com>
Subject: [PATCH 06/10] Input: goodix - Add support for controlling the IRQ pin through ACPI methods
Date: Wed, 1 Jan 2020 15:54:25 +0100 [thread overview]
Message-ID: <20200101145429.16185-6-hdegoede@redhat.com> (raw)
In-Reply-To: <20200101145429.16185-1-hdegoede@redhat.com>
Some Apollo Lake (x86, UEFI + ACPI) devices only list the reset GPIO
in their _CRS table and the bit-banging of the IRQ line necessary to
wake-up the controller from suspend can be done by calling 2 Goodix
custom / specific ACPI methods.
This commit adds support for controlling the IRQ line in this matter,
allowing us to properly suspend the touchscreen controller on such
devices.
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1786317
BugLink: https://github.com/nexus511/gpd-ubuntu-packages/issues/10
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=199207
Cc: Dmitry Mastykin <mastichi@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/input/touchscreen/goodix.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index d178aa33b529..784c4dd8c430 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -35,6 +35,7 @@ enum goodix_irq_pin_access_method {
irq_pin_access_none,
irq_pin_access_gpio,
irq_pin_access_acpi_gpio,
+ irq_pin_access_acpi_method,
};
struct goodix_chip_data {
@@ -516,6 +517,9 @@ static int goodix_send_cfg(struct goodix_ts_data *ts,
static int goodix_irq_direction_output(struct goodix_ts_data *ts,
int value)
{
+ struct device *dev = &ts->client->dev;
+ acpi_status status;
+
switch (ts->irq_pin_access_method) {
case irq_pin_access_none:
dev_err(&ts->client->dev,
@@ -530,6 +534,10 @@ static int goodix_irq_direction_output(struct goodix_ts_data *ts,
* as active-low, use output_raw to avoid the value inversion.
*/
return gpiod_direction_output_raw(ts->gpiod_int, value);
+ case irq_pin_access_acpi_method:
+ status = acpi_execute_simple_method(ACPI_HANDLE(dev),
+ "INTO", value);
+ return ACPI_SUCCESS(status) ? 0 : -EIO;
}
return -EINVAL; /* Never reached */
@@ -537,6 +545,9 @@ static int goodix_irq_direction_output(struct goodix_ts_data *ts,
static int goodix_irq_direction_input(struct goodix_ts_data *ts)
{
+ struct device *dev = &ts->client->dev;
+ acpi_status status;
+
switch (ts->irq_pin_access_method) {
case irq_pin_access_none:
dev_err(&ts->client->dev,
@@ -546,6 +557,10 @@ static int goodix_irq_direction_input(struct goodix_ts_data *ts)
case irq_pin_access_gpio:
case irq_pin_access_acpi_gpio:
return gpiod_direction_input(ts->gpiod_int);
+ case irq_pin_access_acpi_method:
+ status = acpi_evaluate_object(ACPI_HANDLE(dev), "INTI",
+ NULL, NULL);
+ return ACPI_SUCCESS(status) ? 0 : -EIO;
}
return -EINVAL; /* Never reached */
@@ -640,6 +655,11 @@ static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = {
{ },
};
+static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = {
+ { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 },
+ { },
+};
+
static int goodix_resource(struct acpi_resource *ares, void *data)
{
struct goodix_ts_data *ts = data;
@@ -690,6 +710,12 @@ static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts)
} else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) {
ts->irq_pin_access_method = irq_pin_access_acpi_gpio;
gpio_mapping = acpi_goodix_int_last_gpios;
+ } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 &&
+ acpi_has_method(ACPI_HANDLE(dev), "INTI") &&
+ acpi_has_method(ACPI_HANDLE(dev), "INTO")) {
+ dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n");
+ ts->irq_pin_access_method = irq_pin_access_acpi_method;
+ gpio_mapping = acpi_goodix_reset_only_gpios;
} else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) {
dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n");
ts->irq_pin_access_method = irq_pin_access_acpi_gpio;
@@ -778,6 +804,10 @@ static int goodix_get_gpio_config(struct goodix_ts_data *ts)
if (!ts->gpiod_int || !ts->gpiod_rst)
ts->irq_pin_access_method = irq_pin_access_none;
break;
+ case irq_pin_access_acpi_method:
+ if (!ts->gpiod_rst)
+ ts->irq_pin_access_method = irq_pin_access_none;
+ break;
default:
if (ts->gpiod_int && ts->gpiod_rst) {
ts->reset_controller_at_probe = true;
--
2.24.1
next prev parent reply other threads:[~2020-01-01 14:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-01 14:54 [PATCH 01/10] Input: goodix - Refactor IRQ pin GPIO accesses Hans de Goede
2020-01-01 14:54 ` [PATCH 02/10] Input: goodix - Make loading the config from disk independent from the GPIO setup Hans de Goede
2020-01-01 14:54 ` [PATCH 03/10] Input: goodix - Make resetting the controller at probe " Hans de Goede
2020-01-01 14:54 ` [PATCH 04/10] Input: goodix - Add support for getting IRQ + reset GPIOs on Cherry Trail devices Hans de Goede
2020-01-01 14:54 ` [PATCH 05/10] Input: goodix - Add support for getting IRQ + reset GPIOs on Bay " Hans de Goede
2020-01-01 14:54 ` Hans de Goede [this message]
2020-01-01 14:54 ` [PATCH 07/10] Input: goodix - Move defines to above struct goodix_ts_data declaration Hans de Goede
2020-01-01 14:54 ` [PATCH 08/10] Input: goodix - Save a copy of the config from goodix_read_config() Hans de Goede
2020-01-01 14:54 ` [PATCH 09/10] Input: goodix - Make goodix_send_cfg() take a raw buffer as argument Hans de Goede
2020-01-01 14:54 ` [PATCH 10/10] Input: goodix - Restore config on resume if necessary Hans de Goede
2020-02-05 11:40 ` [PATCH 01/10] Input: goodix - Refactor IRQ pin GPIO accesses Hans de Goede
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