diff options
| author | Rabin Vincent <rabin.vincent@stericsson.com> | 2010-08-09 15:55:48 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-09-23 18:01:59 +0400 |
| commit | 148b8b39c156424da22693d26adcb69800faf95e (patch) | |
| tree | cf3c1f37a69d81cfb04e968cb7911371ddf9ed80 /drivers/mmc | |
| parent | 8301bb68c6bb9836889641a47443aeb97b763f6c (diff) | |
| download | linux-148b8b39c156424da22693d26adcb69800faf95e.tar.xz | |
ARM: 6308/1: mmci: support card detection interrupts
If an IRQ can be requested on the card detected GPIO, use it instead of
polling.
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/mmci.c | 24 | ||||
| -rw-r--r-- | drivers/mmc/host/mmci.h | 1 |
2 files changed, 24 insertions, 1 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 1932e9cc8f52..a922a0028836 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -601,6 +601,15 @@ static int mmci_get_cd(struct mmc_host *mmc) return status; } +static irqreturn_t mmci_cd_irq(int irq, void *dev_id) +{ + struct mmci_host *host = dev_id; + + mmc_detect_change(host->mmc, msecs_to_jiffies(500)); + + return IRQ_HANDLED; +} + static const struct mmc_host_ops mmci_ops = { .request = mmci_request, .set_ios = mmci_set_ios, @@ -637,6 +646,7 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id) host->gpio_wp = -ENOSYS; host->gpio_cd = -ENOSYS; + host->gpio_cd_irq = -1; host->hw_designer = amba_manf(dev); host->hw_revision = amba_rev(dev); @@ -716,7 +726,6 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id) if (host->vcc == NULL) mmc->ocr_avail = plat->ocr_mask; mmc->caps = plat->capabilities; - mmc->caps |= MMC_CAP_NEEDS_POLL; /* * We can do SGIO @@ -761,6 +770,12 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id) host->gpio_cd = plat->gpio_cd; else if (ret != -ENOSYS) goto err_gpio_cd; + + ret = request_any_context_irq(gpio_to_irq(plat->gpio_cd), + mmci_cd_irq, 0, + DRIVER_NAME " (cd)", host); + if (ret >= 0) + host->gpio_cd_irq = gpio_to_irq(plat->gpio_cd); } if (gpio_is_valid(plat->gpio_wp)) { ret = gpio_request(plat->gpio_wp, DRIVER_NAME " (wp)"); @@ -772,6 +787,9 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id) goto err_gpio_wp; } + if (host->gpio_cd_irq < 0) + mmc->caps |= MMC_CAP_NEEDS_POLL; + ret = request_irq(dev->irq[0], mmci_irq, IRQF_SHARED, DRIVER_NAME " (cmd)", host); if (ret) goto unmap; @@ -798,6 +816,8 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id) if (host->gpio_wp != -ENOSYS) gpio_free(host->gpio_wp); err_gpio_wp: + if (host->gpio_cd_irq >= 0) + free_irq(host->gpio_cd_irq, host); if (host->gpio_cd != -ENOSYS) gpio_free(host->gpio_cd); err_gpio_cd: @@ -836,6 +856,8 @@ static int __devexit mmci_remove(struct amba_device *dev) if (host->gpio_wp != -ENOSYS) gpio_free(host->gpio_wp); + if (host->gpio_cd_irq >= 0) + free_irq(host->gpio_cd_irq, host); if (host->gpio_cd != -ENOSYS) gpio_free(host->gpio_cd); diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h index 4e18f5403f48..c7d373c7aec9 100644 --- a/drivers/mmc/host/mmci.h +++ b/drivers/mmc/host/mmci.h @@ -147,6 +147,7 @@ struct mmci_host { struct clk *clk; int gpio_cd; int gpio_wp; + int gpio_cd_irq; unsigned int data_xfered; |