Commit e5bbf307 authored by Adrian Hunter's avatar Adrian Hunter Committed by Ulf Hansson

mmc: sdhci-acpi: Ensure connected devices are powered when probing

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 78a898d0 ("ACPI / PM: Export acpi_device_fix_up_power()")
Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Reported-and-tested-by: default avatarLaszlo Fiat <laszlo.fiat@gmail.com>
Cc: <stable@vger.kernel.org> # 4.5+
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Reported-by: default avatarLaszlo 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
parent 78a898d0
...@@ -378,7 +378,7 @@ static int sdhci_acpi_probe(struct platform_device *pdev) ...@@ -378,7 +378,7 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
{ {
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
acpi_handle handle = ACPI_HANDLE(dev); acpi_handle handle = ACPI_HANDLE(dev);
struct acpi_device *device; struct acpi_device *device, *child;
struct sdhci_acpi_host *c; struct sdhci_acpi_host *c;
struct sdhci_host *host; struct sdhci_host *host;
struct resource *iomem; struct resource *iomem;
...@@ -390,6 +390,11 @@ static int sdhci_acpi_probe(struct platform_device *pdev) ...@@ -390,6 +390,11 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
if (acpi_bus_get_device(handle, &device)) if (acpi_bus_get_device(handle, &device))
return -ENODEV; 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) if (acpi_bus_get_status(device) || !device->status.present)
return -ENODEV; return -ENODEV;
......
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