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authorAaron Lu <aaron.lu@intel.com>2014-11-24 12:32:33 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-11-27 01:32:06 +0300
commit491cb357decca2b3eeaac5a8498ad23e7dd073b7 (patch)
tree7dfd51d322c6836ccd0d3332e3e2351e4fbc5360 /drivers/acpi/pmic
parentd8139f6311129b4fdc370cbfc03424afea83693b (diff)
downloadlinux-491cb357decca2b3eeaac5a8498ad23e7dd073b7.tar.xz
ACPI / PMIC: AXP288: support virtual GPIO in ACPI table
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>
Diffstat (limited to 'drivers/acpi/pmic')
-rw-r--r--drivers/acpi/pmic/intel_pmic_xpower.c30
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/acpi/pmic/intel_pmic_xpower.c b/drivers/acpi/pmic/intel_pmic_xpower.c
index f8853e5eb838..6a082d4de12c 100644
--- a/drivers/acpi/pmic/intel_pmic_xpower.c
+++ b/drivers/acpi/pmic/intel_pmic_xpower.c
@@ -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 = {