Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=619ef4...
Commit: 619ef4b42128709de4d89d209b2c874f560deecd
Parent: 28f52482b41edc88cdf575aa6ed414c6e116ce10
Author: Anton Vorontsov <avorontsov@ru.mvista.com>
AuthorDate: Tue Jun 17 18:17:21 2008 +0400
Committer: Pierre Ossman <drzeus@drzeus.cx>
CommitDate: Tue Jul 15 14:14:41 2008 +0200
mmc_spi: add support for card-detection polling
This patch adds new platform data variable "caps", so platforms
could pass theirs capabilities into MMC core (for example, platforms
without interrupt on the CD line will most probably want to pass
MMC_CAP_NEEDS_POLL).
New platform get_cd() callback provided to optimize polling.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
---
drivers/mmc/host/mmc_spi.c | 19 +++++++++++++++++--
include/linux/spi/mmc_spi.h | 9 +++++++++
2 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
index 3550858..547eb85 100644
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -1131,11 +1131,20 @@ static int mmc_spi_get_ro(struct mmc_host *mmc)
return 0;
}
+static int mmc_spi_get_cd(struct mmc_host *mmc)
+{
+ struct mmc_spi_host *host = mmc_priv(mmc);
+
+ if (host->pdata && host->pdata->get_cd)
+ return !!host->pdata->get_cd(mmc->parent);
+ return -ENOSYS;
+}
static const struct mmc_host_ops mmc_spi_ops = {
.request = mmc_spi_request,
.set_ios = mmc_spi_set_ios,
.get_ro = mmc_spi_get_ro,
+ .get_cd = mmc_spi_get_cd,
};
@@ -1319,17 +1328,23 @@ static int mmc_spi_probe(struct spi_device *spi)
goto fail_glue_init;
}
+ /* pass platform capabilities, if any */
+ if (host->pdata)
+ mmc->caps |= host->pdata->caps;
+
status = mmc_add_host(mmc);
if (status != 0)
goto fail_add_host;
- dev_info(&spi->dev, "SD/MMC host %s%s%s%s\n",
+ dev_info(&spi->dev, "SD/MMC host %s%s%s%s%s\n",
mmc->class_dev.bus_id,
host->dma_dev ? "" : ", no DMA",
(host->pdata && host->pdata->get_ro)
? "" : ", no WP",
(host->pdata && host->pdata->setpower)
- ? "" : ", no poweroff");
+ ? "" : ", no poweroff",
+ (mmc->caps & MMC_CAP_NEEDS_POLL)
+ ? ", cd polling" : "");
return 0;
fail_add_host:
diff --git a/include/linux/spi/mmc_spi.h b/include/linux/spi/mmc_spi.h
index d5ca78b..a3626ae 100644
--- a/include/linux/spi/mmc_spi.h
+++ b/include/linux/spi/mmc_spi.h
@@ -23,6 +23,15 @@ struct mmc_spi_platform_data {
/* sense switch on sd cards */
int (*get_ro)(struct device *);
+ /*
+ * If board does not use CD interrupts, driver can optimize polling
+ * using this function.
+ */
+ int (*get_cd)(struct device *);
+
+ /* Capabilities to pass into mmc core (e.g. MMC_CAP_NEEDS_POLL). */
+ unsigned long caps;
+
/* how long to debounce card detect, in msecs */
u16 detect_delay;
--
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
