Messages in this thread Patch in this message | | | From | Philip Elcan <> | Subject | [PATCH] mmc: sdhci-acpi: set non-removable in ACPI table | Date | Thu, 3 Dec 2015 08:48:00 -0500 |
| |
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@codeaurora.org> --- 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
| |