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authorLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>2013-08-08 12:38:32 +0200
committerChris Ball <cjb@laptop.org>2013-08-25 05:45:22 +0200
commitbf287a90ceedf86e3313ba0dcff606ac5399b39a (patch)
treea3337495e68fde2270c406574774a283c0b4e002 /drivers/mmc/host/mmc_spi.c
parentmmc: slot-gpio: Add debouncing capability to mmc_gpio_request_cd() (diff)
downloadlinux-bf287a90ceedf86e3313ba0dcff606ac5399b39a.tar.xz
linux-bf287a90ceedf86e3313ba0dcff606ac5399b39a.zip
mmc: mmc_spi: Support CD/RO GPIOs
Add support for passing CD/RO GPIO numbers directly to the mmc_spi driver instead of relying solely on board code callbacks to retrieve the CD/RO signals values. The driver will enable debouncing on the card detect GPIO if the cd_debounce field is set to a non-zero value. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/mmc_spi.c')
-rw-r--r--drivers/mmc/host/mmc_spi.c33
1 files changed, 24 insertions, 9 deletions
diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
index 74145d1d51f5..62fb82d7c942 100644
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -36,6 +36,7 @@
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h> /* for R1_SPI_* bit values */
+#include <linux/mmc/slot-gpio.h>
#include <linux/spi/spi.h>
#include <linux/spi/mmc_spi.h>
@@ -1278,11 +1279,8 @@ static int mmc_spi_get_ro(struct mmc_host *mmc)
if (host->pdata && host->pdata->get_ro)
return !!host->pdata->get_ro(mmc->parent);
- /*
- * Board doesn't support read only detection; let the mmc core
- * decide what to do.
- */
- return -ENOSYS;
+ else
+ return mmc_gpio_get_ro(mmc);
}
static int mmc_spi_get_cd(struct mmc_host *mmc)
@@ -1291,7 +1289,8 @@ static int mmc_spi_get_cd(struct mmc_host *mmc)
if (host->pdata && host->pdata->get_cd)
return !!host->pdata->get_cd(mmc->parent);
- return -ENOSYS;
+ else
+ return mmc_gpio_get_cd(mmc);
}
static const struct mmc_host_ops mmc_spi_ops = {
@@ -1324,6 +1323,7 @@ static int mmc_spi_probe(struct spi_device *spi)
struct mmc_host *mmc;
struct mmc_spi_host *host;
int status;
+ bool has_ro = false;
/* We rely on full duplex transfers, mostly to reduce
* per-transfer overheads (by making fewer transfers).
@@ -1448,18 +1448,33 @@ static int mmc_spi_probe(struct spi_device *spi)
}
/* pass platform capabilities, if any */
- if (host->pdata)
+ if (host->pdata) {
mmc->caps |= host->pdata->caps;
+ mmc->caps2 |= host->pdata->caps2;
+ }
status = mmc_add_host(mmc);
if (status != 0)
goto fail_add_host;
+ if (host->pdata && host->pdata->flags & MMC_SPI_USE_CD_GPIO) {
+ status = mmc_gpio_request_cd(mmc, host->pdata->cd_gpio,
+ host->pdata->cd_debounce);
+ if (status != 0)
+ goto fail_add_host;
+ }
+
+ if (host->pdata && host->pdata->flags & MMC_SPI_USE_RO_GPIO) {
+ has_ro = true;
+ status = mmc_gpio_request_ro(mmc, host->pdata->ro_gpio);
+ if (status != 0)
+ goto fail_add_host;
+ }
+
dev_info(&spi->dev, "SD/MMC host %s%s%s%s%s\n",
dev_name(&mmc->class_dev),
host->dma_dev ? "" : ", no DMA",
- (host->pdata && host->pdata->get_ro)
- ? "" : ", no WP",
+ has_ro ? "" : ", no WP",
(host->pdata && host->pdata->setpower)
? "" : ", no poweroff",
(mmc->caps & MMC_CAP_NEEDS_POLL)