Some devices connected to the SDHCI controller may have separate enabling
lines that are controlled through GPIO. These devices need to be powered
on and enabled before probing. This is to ensure all devices connected can
be seen by the controller.
Note, for "stable" this patch depends on the following change:
commit
78a898d0e395 ("ACPI / PM: Export acpi_device_fix_up_power()")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reported-and-tested-by: Laszlo Fiat <laszlo.fiat@gmail.com>
Cc: <stable@vger.kernel.org> # 4.5+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reported-by: Laszlo Fiat <laszlo.fiat@gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=112571
Link: http://lkml.kernel.org/r/CA+7w51inLtQSr656bJvOjGG9oQWKYPXH+xxDPJKbeJ=CcrkS9Q@mail.gmail.com
{
struct device *dev = &pdev->dev;
acpi_handle handle = ACPI_HANDLE(dev);
- struct acpi_device *device;
+ struct acpi_device *device, *child;
struct sdhci_acpi_host *c;
struct sdhci_host *host;
struct resource *iomem;
if (acpi_bus_get_device(handle, &device))
return -ENODEV;
+ /* Power on the SDHCI controller and its children */
+ acpi_device_fix_up_power(device);
+ list_for_each_entry(child, &device->children, node)
+ acpi_device_fix_up_power(child);
+
if (acpi_bus_get_status(device) || !device->status.present)
return -ENODEV;