diff options
author | Adrian Hunter <adrian.hunter@intel.com> | 2014-03-10 13:02:40 (GMT) |
---|---|---|
committer | Chris Ball <chris@printf.net> | 2014-03-17 13:11:53 (GMT) |
commit | 26652671338a443fd33cf47b50658dd8b095d54a (patch) | |
tree | b5ef1db1931b81826f745f3fa382fd885579a372 /drivers/mmc/core | |
parent | 842f4bdd37c7a0984e22aa919ad1f043137ac5c8 (diff) | |
download | linux-26652671338a443fd33cf47b50658dd8b095d54a.tar.xz |
mmc: slot-gpio: Split out CD IRQ request into a separate function
In preparation for adding a descriptor-based CD GPIO API, split out
CD IRQ request into a separate function.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'drivers/mmc/core')
-rw-r--r-- | drivers/mmc/core/slot-gpio.c | 58 |
1 files changed, 35 insertions, 23 deletions
diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c index 86547a2..47fa07e 100644 --- a/drivers/mmc/core/slot-gpio.c +++ b/drivers/mmc/core/slot-gpio.c @@ -139,6 +139,39 @@ int mmc_gpio_request_ro(struct mmc_host *host, unsigned int gpio) } EXPORT_SYMBOL(mmc_gpio_request_ro); +static void mmc_gpiod_request_cd_irq(struct mmc_host *host) +{ + struct mmc_gpio *ctx = host->slot.handler_priv; + int ret, irq; + + if (host->slot.cd_irq >= 0 || !ctx || !ctx->cd_gpio) + return; + + irq = gpiod_to_irq(ctx->cd_gpio); + + /* + * Even if gpiod_to_irq() returns a valid IRQ number, the platform might + * still prefer to poll, e.g., because that IRQ number is already used + * by another unit and cannot be shared. + */ + if (irq >= 0 && host->caps & MMC_CAP_NEEDS_POLL) + irq = -EINVAL; + + if (irq >= 0) { + ret = devm_request_threaded_irq(&host->class_dev, irq, + NULL, mmc_gpio_cd_irqt, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + ctx->cd_label, host); + if (ret < 0) + irq = ret; + } + + host->slot.cd_irq = irq; + + if (irq < 0) + host->caps |= MMC_CAP_NEEDS_POLL; +} + /** * mmc_gpio_request_cd - request a gpio for card-detection * @host: mmc host @@ -162,7 +195,6 @@ int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio, unsigned int debounce) { struct mmc_gpio *ctx; - int irq = gpio_to_irq(gpio); int ret; ret = mmc_gpio_alloc(host); @@ -187,31 +219,11 @@ int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio, return ret; } - /* - * Even if gpio_to_irq() returns a valid IRQ number, the platform might - * still prefer to poll, e.g., because that IRQ number is already used - * by another unit and cannot be shared. - */ - if (irq >= 0 && host->caps & MMC_CAP_NEEDS_POLL) - irq = -EINVAL; - - if (irq >= 0) { - ret = devm_request_threaded_irq(&host->class_dev, irq, - NULL, mmc_gpio_cd_irqt, - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, - ctx->cd_label, host); - if (ret < 0) - irq = ret; - } - - host->slot.cd_irq = irq; - - if (irq < 0) - host->caps |= MMC_CAP_NEEDS_POLL; - ctx->override_cd_active_level = true; ctx->cd_gpio = gpio_to_desc(gpio); + mmc_gpiod_request_cd_irq(host); + return 0; } EXPORT_SYMBOL(mmc_gpio_request_cd); |