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mmc: sdhci-acpi: support runtime PM for ACPI HID 80860F14 SD cards

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Enable runtime PM for ACPI HID 80860F14 SD cards, adding support for
card detect GPIO.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Adrian Hunter 2013-05-06 12:17:33 +03:00 committed by Chris Ball
parent f0710a557c
commit a61abe6eeb
1 changed files with 63 additions and 1 deletions
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64
drivers/mmc/host/sdhci-acpi.c
View File

@ -31,8 +31,10 @@
#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/acpi.h>
#include <linux/acpi_gpio.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
@ -101,6 +103,8 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
};
static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
.flags = SDHCI_ACPI_SD_CD | SDHCI_ACPI_RUNTIME_PM,
.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON,
};
struct sdhci_acpi_uid_slot {
@ -161,6 +165,57 @@ static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(acpi_handle handle,
return slot;
}
#ifdef CONFIG_PM_RUNTIME
static irqreturn_t sdhci_acpi_sd_cd(int irq, void *dev_id)
{
mmc_detect_change(dev_id, msecs_to_jiffies(200));
return IRQ_HANDLED;
}
static int sdhci_acpi_add_own_cd(struct device *dev, int gpio,
struct mmc_host *mmc)
{
unsigned long flags;
int err, irq;
if (gpio < 0) {
err = gpio;
goto out;
}
err = devm_gpio_request_one(dev, gpio, GPIOF_DIR_IN, "sd_cd");
if (err)
goto out;
irq = gpio_to_irq(gpio);
if (irq < 0)
goto out_free;
flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
err = devm_request_irq(dev, irq, sdhci_acpi_sd_cd, flags, "sd_cd", mmc);
if (err)
goto out_free;
return 0;
out_free:
devm_gpio_free(dev, gpio);
out:
dev_warn(dev, "failed to setup card detect wake up\n");
return err;
}
#else
static int sdhci_acpi_add_own_cd(struct device *dev, int gpio,
struct mmc_host *mmc)
{
return 0;
}
#endif
static int sdhci_acpi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@ -171,7 +226,7 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
struct resource *iomem;
resource_size_t len;
const char *hid;
int err;
int err, gpio;
if (acpi_bus_get_device(handle, &device))
return -ENODEV;
@ -196,6 +251,8 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
if (IS_ERR(host))
return PTR_ERR(host);
gpio = acpi_get_gpio_by_index(dev, 0, NULL);
c = sdhci_priv(host);
c->host = host;
c->slot = sdhci_acpi_get_slot(handle, hid);
@ -251,6 +308,11 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
if (err)
goto err_free;
if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
if (sdhci_acpi_add_own_cd(dev, gpio, host->mmc))
c->use_runtime_pm = false;
}
if (c->use_runtime_pm) {
pm_runtime_set_active(dev);
pm_suspend_ignore_children(dev, 1);