This allows setting an SDHC controller as non-removable
by using the _RMV method in the ACPI table. It doesn't
mark it as non-removable if GPIO card detection is
already setup.
Signed-off-by: Philip Elcan <pelcan@xxxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci-acpi.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index f6047fc..8c06ba6 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -288,6 +288,20 @@ static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid,
return NULL;
}
+static bool sdhci_acpi_is_removable(acpi_handle handle)
+{
+ acpi_status status;
+ unsigned long long removable = 1; /* default to removable */
+
+ if (acpi_has_method(handle, "_EJ0"))
+ return true;
+ status = acpi_evaluate_integer(handle, "_RMV", NULL, &removable);
+ if (ACPI_SUCCESS(status) && !removable)
+ return false;
+
+ return true;
+}
+
static int sdhci_acpi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -300,6 +314,7 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
const char *hid;
const char *uid;
int err;
+ bool gpio_cd = false;
if (acpi_bus_get_device(handle, &device))
return -ENODEV;
@@ -373,9 +388,14 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL)) {
dev_warn(dev, "failed to setup card detect gpio\n");
c->use_runtime_pm = false;
+ } else {
+ gpio_cd = true;
}
}
+ if (!gpio_cd && !sdhci_acpi_is_removable(handle))
+ host->mmc->caps |= MMC_CAP_NONREMOVABLE;
+
err = sdhci_add_host(host);
if (err)
goto err_free;
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
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