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| author | Adrian Hunter <adrian.hunter@intel.com> | 2016-05-19 15:25:42 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-05-20 16:00:25 +0200 |
| commit | e5bbf30733f930a1d17b4ccf19eac88e30a39cc7 (patch) | |
| tree | 3e509de22f32754b00b5a9d949997d49947120e2 /drivers/mmc/host/sdhci-acpi.c | |
| parent | ACPI / PM: Export acpi_device_fix_up_power() (diff) | |
| download | linux-e5bbf30733f930a1d17b4ccf19eac88e30a39cc7.tar.xz linux-e5bbf30733f930a1d17b4ccf19eac88e30a39cc7.zip | |
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 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
Diffstat (limited to 'drivers/mmc/host/sdhci-acpi.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-acpi.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c index b2d70ba6caa7..2d1c4870c285 100644 --- a/drivers/mmc/host/sdhci-acpi.c +++ b/drivers/mmc/host/sdhci-acpi.c @@ -378,7 +378,7 @@ static int sdhci_acpi_probe(struct platform_device *pdev) { 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; @@ -390,6 +390,11 @@ static int sdhci_acpi_probe(struct platform_device *pdev) 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; |