The same virtual GPIO strategy is also used for the AXP288 PMIC in that
various control methods that are used to do power rail handling and
sensor reading/setting will touch GPIO fields defined under the PMIC
device. The GPIO fileds are only defined by the ACPI code while the
actual hardware doesn't really have a GPIO controller, but to make those
control method execution succeed, we have to install a GPIO handler for
the PMIC device handle. Since we do not need the virtual GPIO strategy,
we can simply do nothing in that handler.
Signed-off-by: Aaron Lu <aaron.lu@xxxxxxxxx>
---
drivers/acpi/pmic/intel_pmic_xpower.c | 27 +++++++++++++++++++++++----
1 file changed, 23 insertions(+), 4 deletions(-)
diff --git a/drivers/acpi/pmic/intel_pmic_xpower.c b/drivers/acpi/pmic/intel_pmic_xpower.c
index 6c4d6ce0cff1..480c41c36444 100644
--- a/drivers/acpi/pmic/intel_pmic_xpower.c
+++ b/drivers/acpi/pmic/intel_pmic_xpower.c
@@ -251,13 +251,32 @@ static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
.thermal_table_count = ARRAY_SIZE(thermal_table),
};
+static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
+ acpi_physical_address address, u32 bit_width, u64 *value,
+ void *handler_context, void *region_context)
+{
+ return AE_OK;
+}
static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
{
- struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
- return intel_pmic_install_opregion_handler(&pdev->dev,
- ACPI_HANDLE(pdev->dev.parent), axp20x->regmap,
- &intel_xpower_pmic_opregion_data);
+ struct device *parent = pdev->dev.parent;
+ struct axp20x_dev *axp20x = dev_get_drvdata(parent);
+ acpi_status status;
+ int result;
+
+ result = intel_pmic_install_opregion_handler(&pdev->dev,
+ ACPI_HANDLE(parent), axp20x->regmap,
+ &intel_xpower_pmic_opregion_data);
+ if (!result) {
+ status = acpi_install_address_space_handler(
+ ACPI_HANDLE(parent), ACPI_ADR_SPACE_GPIO,
+ intel_xpower_pmic_gpio_handler, NULL, NULL);
+ if (ACPI_FAILURE(status))
+ result = -ENODEV;
+ }
+
+ return result;
}
static struct platform_driver intel_xpower_pmic_opregion_driver = {
--
1.9.3
--
To unsubscribe from this list: send the line "unsubscribe linux-iio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
