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ACPI / PMIC: AXP288: support virtual GPIO in ACPI table

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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@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Aaron Lu 2014-11-24 17:32:33 +08:00 committed by Rafael J. Wysocki
parent d8139f6311
commit 491cb357de
1 changed files with 26 additions and 4 deletions
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30
drivers/acpi/pmic/intel_pmic_xpower.c
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@ -220,13 +220,35 @@ 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;
status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
NULL, NULL);
if (ACPI_FAILURE(status))
return -ENODEV;
result = intel_pmic_install_opregion_handler(&pdev->dev,
ACPI_HANDLE(parent), axp20x->regmap,
&intel_xpower_pmic_opregion_data);
if (result)
acpi_remove_address_space_handler(ACPI_HANDLE(parent),
ACPI_ADR_SPACE_GPIO,
intel_xpower_pmic_gpio_handler);
return result;
}
static struct platform_driver intel_xpower_pmic_opregion_driver = {