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authorHeiner Kallweit <hkallweit1@gmail.com>2023-02-15 00:41:19 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2023-02-15 15:46:09 +0300
commit88f94c782b0ee2297685764f942e7c176d6b89aa (patch)
tree47460f77b163a8fb509c6e12e15953809df771e3 /drivers/mmc
parent9e622229bbf4f2204f7a4bc47f9dffb2307e4949 (diff)
downloadlinux-88f94c782b0ee2297685764f942e7c176d6b89aa.tar.xz
mmc: core: support setting card detect interrupt from drivers
On certain platforms like Amlogic Meson gpiod_to_irq() isn't supported due to the design of gpio / interrupt controller. Therefore provide an option for drivers to pass the card detect interrupt number (retrieved e.g. from device tree) to mmc core. Suggested-by refers to the mechanism to pass and store the interrupt. Suggested-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Link: https://lore.kernel.org/r/5777f38b-465f-ce48-a87f-5eb8b3c57b0a@gmail.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/core/slot-gpio.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c
index dd2a4b6ab6ad..2a2d949a9344 100644
--- a/drivers/mmc/core/slot-gpio.c
+++ b/drivers/mmc/core/slot-gpio.c
@@ -23,6 +23,7 @@ struct mmc_gpio {
char *ro_label;
char *cd_label;
u32 cd_debounce_delay_ms;
+ int cd_irq;
};
static irqreturn_t mmc_gpio_cd_irqt(int irq, void *dev_id)
@@ -53,12 +54,24 @@ int mmc_gpio_alloc(struct mmc_host *host)
ctx->ro_label = devm_kasprintf(host->parent, GFP_KERNEL, "%s ro", devname);
if (!ctx->ro_label)
return -ENOMEM;
+ ctx->cd_irq = -EINVAL;
host->slot.handler_priv = ctx;
host->slot.cd_irq = -EINVAL;
return 0;
}
+void mmc_gpio_set_cd_irq(struct mmc_host *host, int irq)
+{
+ struct mmc_gpio *ctx = host->slot.handler_priv;
+
+ if (!ctx || irq < 0)
+ return;
+
+ ctx->cd_irq = irq;
+}
+EXPORT_SYMBOL(mmc_gpio_set_cd_irq);
+
int mmc_gpio_get_ro(struct mmc_host *host)
{
struct mmc_gpio *ctx = host->slot.handler_priv;
@@ -98,7 +111,9 @@ void mmc_gpiod_request_cd_irq(struct mmc_host *host)
* Do not use IRQ if the platform prefers to poll, e.g., because that
* IRQ number is already used by another unit and cannot be shared.
*/
- if (!(host->caps & MMC_CAP_NEEDS_POLL))
+ if (ctx->cd_irq >= 0)
+ irq = ctx->cd_irq;
+ else if (!(host->caps & MMC_CAP_NEEDS_POLL))
irq = gpiod_to_irq(ctx->cd_gpio);
if (irq >= 0) {