| From 752e9164e76bd3939fee866686a9d3b255f28cbe Mon Sep 17 00:00:00 2001 |
| From: Masahiro Yamada <yamada.masahiro@socionext.com> |
| Date: Thu, 18 Jan 2018 01:28:05 +0900 |
| Subject: [PATCH 0551/1795] mmc: slot-gpio: add a helper to check capability of |
| GPIO WP detection |
| |
| Like mmc_can_gpio_cd(), mmc_can_gpio_ro() will also be useful for host |
| drivers to know whether GPIO write-protect detection is supported. |
| |
| Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> |
| Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> |
| (cherry picked from commit 85f9ef8cdfb463e6e8ff9fe8cdcc0aed438b526e) |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> |
| --- |
| drivers/mmc/core/slot-gpio.c | 8 ++++++++ |
| include/linux/mmc/slot-gpio.h | 1 + |
| 2 files changed, 9 insertions(+) |
| |
| diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c |
| index 863f1dbbfc1b..5ce102358a44 100644 |
| --- a/drivers/mmc/core/slot-gpio.c |
| +++ b/drivers/mmc/core/slot-gpio.c |
| @@ -307,3 +307,11 @@ int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id, |
| return 0; |
| } |
| EXPORT_SYMBOL(mmc_gpiod_request_ro); |
| + |
| +bool mmc_can_gpio_ro(struct mmc_host *host) |
| +{ |
| + struct mmc_gpio *ctx = host->slot.handler_priv; |
| + |
| + return ctx->ro_gpio ? true : false; |
| +} |
| +EXPORT_SYMBOL(mmc_can_gpio_ro); |
| diff --git a/include/linux/mmc/slot-gpio.h b/include/linux/mmc/slot-gpio.h |
| index 82f0d289f110..91f1ba0663c8 100644 |
| --- a/include/linux/mmc/slot-gpio.h |
| +++ b/include/linux/mmc/slot-gpio.h |
| @@ -33,5 +33,6 @@ 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); |
| bool mmc_can_gpio_cd(struct mmc_host *host); |
| +bool mmc_can_gpio_ro(struct mmc_host *host); |
| |
| #endif |
| -- |
| 2.19.0 |
| |