-Original Message-
From: linux-mmc-ow...@vger.kernel.org [mailto:linux-mmc-
ow...@vger.kernel.org] On Behalf Of Ohad Ben-Cohen
Sent: Tuesday, July 06, 2010 6:08 AM
To: linux-wirel...@vger.kernel.org; linux-...@vger.kernel.org; linux-
o...@vger.kernel.org
Cc: linux-arm-ker...@lists.infradead.org; li...@arm.linux.org.uk;
Chikkature Rajashekar, Madhusudhan; Luciano Coelho; a...@linux-
foundation.org; San Mehat; Ben-cohen, Ohad
Subject: [PATCH 04/15] mmc: support embedded data field in mmc_host
From: Ohad Ben-Cohen oh...@ti.com
Add support to set/get mmc_host private embedded
data.
This is needed to allow software to dynamically
create (and remove) SDIO functions which represents
embedded SDIO devices.
Typically, it will be used to set the context of
a driver that is creating a new SDIO function
(and would then expect to be able to get that context
back upon creation of the new sdio func).
Signed-off-by: Ohad Ben-Cohen oh...@ti.com
---
drivers/mmc/core/Kconfig |8
include/linux/mmc/host.h | 16
2 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/core/Kconfig b/drivers/mmc/core/Kconfig
index bb22ffd..ab27eb3 100644
--- a/drivers/mmc/core/Kconfig
+++ b/drivers/mmc/core/Kconfig
@@ -16,3 +16,11 @@ config MMC_UNSAFE_RESUME
This option sets a default which can be overridden by the
module parameter removable=0 or removable=1.
+
+config MMC_EMBEDDED_SDIO
+ boolean MMC embedded SDIO device support
+ help
+ If you say Y here, support will be added for embedded SDIO
+ devices (e.g. hardwired embedded WLAN SDIO devices).
+ Such devices require software support for emulating
+ card detect events.
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index f65913c..9a48486 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -209,6 +209,10 @@ struct mmc_host {
struct led_trigger *led; /* activity led */
#endif
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+ void*embedded_data;
+#endif
+
struct dentry *debugfs_root;
unsigned long private[0] cacheline_aligned;
@@ -264,5 +268,17 @@ static inline void mmc_set_disable_delay(struct
mmc_host *host,
host-disable_delay = disable_delay;
}
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+static inline void *mmc_get_embedded_data(struct mmc_host *host)
+{
+ return host-embedded_data;
+}
+
+static inline void mmc_set_embedded_data(struct mmc_host *host, void
*data)
+{
+ host-embedded_data = data;
+}
+#endif
+
[Ghorai] we can avoid CONFIG_MMC_EMBEDDED_SDIO flag itself. Why we are passing
fixed data? We can enquire form card for the functions, features,.. and at
runtime itself. And we are adding many compile-time/kconfig options in this
patch series.
#endif
--
1.7.0.4
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