Commit c7ea834d authored by NeilBrown's avatar NeilBrown Committed by Ulf Hansson

mmc: slot-gpio: Allow host driver to provide isr for card-detect interrupts

One of the reasons omap_hsmmc doesn't use the slot-gpio library
is that it has some non-standard functionality in the card-detect
interrupt service routine.

To make it possible for omap_hsmmc (and maybe others) to be converted
to use slot-gpio, add 'mmc_gpio_request_cd_isr' which provide an
alternate isr to be register by the slot-gpio code.
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 94203042
......@@ -25,6 +25,7 @@ struct mmc_gpio {
struct gpio_desc *cd_gpio;
bool override_ro_active_level;
bool override_cd_active_level;
irqreturn_t (*cd_gpio_isr)(int irq, void *dev_id);
char *ro_label;
char cd_label[0];
};
......@@ -136,8 +137,10 @@ void mmc_gpiod_request_cd_irq(struct mmc_host *host)
irq = -EINVAL;
if (irq >= 0) {
if (!ctx->cd_gpio_isr)
ctx->cd_gpio_isr = mmc_gpio_cd_irqt;
ret = devm_request_threaded_irq(host->parent, irq,
NULL, mmc_gpio_cd_irqt,
NULL, ctx->cd_gpio_isr,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
ctx->cd_label, host);
if (ret < 0)
......@@ -151,6 +154,19 @@ void mmc_gpiod_request_cd_irq(struct mmc_host *host)
}
EXPORT_SYMBOL(mmc_gpiod_request_cd_irq);
/* Register an alternate interrupt service routine for
* the card-detect GPIO.
*/
void mmc_gpio_set_cd_isr(struct mmc_host *host,
irqreturn_t (*isr)(int irq, void *dev_id))
{
struct mmc_gpio *ctx = host->slot.handler_priv;
WARN_ON(ctx->cd_gpio_isr);
ctx->cd_gpio_isr = isr;
}
EXPORT_SYMBOL(mmc_gpio_set_cd_isr);
/**
* mmc_gpio_request_cd - request a gpio for card-detection
* @host: mmc host
......
......@@ -26,6 +26,8 @@ int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id,
int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id,
unsigned int idx, bool override_active_level,
unsigned int debounce, bool *gpio_invert);
void mmc_gpio_set_cd_isr(struct mmc_host *host,
irqreturn_t (*isr)(int irq, void *dev_id));
void mmc_gpiod_request_cd_irq(struct mmc_host *host);
#endif
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment