summaryrefslogtreecommitdiff
path: root/src/drivers/i2c
diff options
context:
space:
mode:
Diffstat (limited to 'src/drivers/i2c')
-rw-r--r--src/drivers/i2c/generic/chip.h3
-rw-r--r--src/drivers/i2c/generic/generic.c18
2 files changed, 18 insertions, 3 deletions
diff --git a/src/drivers/i2c/generic/chip.h b/src/drivers/i2c/generic/chip.h
index a4f85df2ee..5810db801f 100644
--- a/src/drivers/i2c/generic/chip.h
+++ b/src/drivers/i2c/generic/chip.h
@@ -29,6 +29,9 @@ struct drivers_i2c_generic_config {
unsigned wake; /* Wake GPE */
struct acpi_irq irq; /* Interrupt */
+ /* Use GPIO based interrupt instead of PIRQ */
+ struct acpi_gpio irq_gpio;
+
/*
* This flag will add a device propery which will indicate
* to the OS that it should probe this device before adding it.
diff --git a/src/drivers/i2c/generic/generic.c b/src/drivers/i2c/generic/generic.c
index dea78d5e89..f8de1c22d9 100644
--- a/src/drivers/i2c/generic/generic.c
+++ b/src/drivers/i2c/generic/generic.c
@@ -68,7 +68,7 @@ void i2c_generic_fill_ssdt(struct device *dev,
};
struct acpi_dp *dsd = NULL;
int curr_index = 0;
- int reset_gpio_index = -1, enable_gpio_index = -1;
+ int reset_gpio_index = -1, enable_gpio_index = -1, irq_gpio_index = -1;
const char *path = acpi_device_path(dev);
if (!dev->enabled || !scope)
@@ -93,7 +93,14 @@ void i2c_generic_fill_ssdt(struct device *dev,
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
acpi_device_write_i2c(&i2c);
- acpi_device_write_interrupt(&config->irq);
+
+ /* Use either Interrupt() or GpioInt() */
+ if (config->irq_gpio.pin_count)
+ irq_gpio_index = i2c_generic_write_gpio(&config->irq_gpio,
+ &curr_index);
+ else
+ acpi_device_write_interrupt(&config->irq);
+
if (i2c_generic_add_gpios_to_crs(config) == true) {
reset_gpio_index = i2c_generic_write_gpio(&config->reset_gpio,
&curr_index);
@@ -110,10 +117,15 @@ void i2c_generic_fill_ssdt(struct device *dev,
/* DSD */
if (config->probed || (reset_gpio_index != -1) ||
- (enable_gpio_index != -1)) {
+ (enable_gpio_index != -1) || (irq_gpio_index != -1)) {
dsd = acpi_dp_new_table("_DSD");
if (config->probed)
acpi_dp_add_integer(dsd, "linux,probed", 1);
+ if (irq_gpio_index != -1)
+ acpi_dp_add_gpio(dsd, "irq-gpios", path,
+ irq_gpio_index, 0,
+ config->irq_gpio.polarity ==
+ ACPI_GPIO_ACTIVE_LOW);
if (reset_gpio_index != -1)
acpi_dp_add_gpio(dsd, "reset-gpios", path,
reset_gpio_index, 0,