Re: [PATCH 02/28] usb: musb: export some symbols for glue driver access

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On Mon, Dec 13, 2010 at 10:10:39AM +0200, Felipe Balbi wrote:
On Mon, Dec 13, 2010 at 01:01:36AM +0800, tom.leiming@xxxxxxxxx wrote:
From: Ming Lei <tom.leiming@xxxxxxxxx>

Export this functions so that glue drivers can see them if glue drivers
are built as modules.

Signed-off-by: Ming Lei <tom.leiming@xxxxxxxxx>
---
drivers/usb/musb/musb_core.c |    7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 2bbf911..070725f 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -116,6 +116,7 @@


unsigned musb_debug;
+EXPORT_SYMBOL(musb_debug);

change all these to EXPORT_SYMBOL_GPL() is glue layer isn't GPL we don't
want it.

BTW, changing all DBG() to dev_dbg() on hw glue layer already kills most
of the complaints. I think it's better to say musb-omap2430 than
musb-hdrc on debug messages comming for omap2430.c as it's a better hint
of where the problem is.

otg_state_string() will be generalized soon with a patchset that's been
sent already, so most of the problems are killed.

I'm also not sure we want to build glue layer as module, it's just a
glue layer anyway, and instead of users just modprobe musb_hdrc they'll
have to modprobe musb-omap2430 && modprobe musb_hdrc, on that order
otherwise it doesn't work. So keep glue layer as bool, and the same
"behavior" is kept. That means a simple change to drivers/Makefile would
be enough. Something like:

diff --git a/drivers/Makefile b/drivers/Makefile
index 14cf907..9c66677 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -65,7 +65,7 @@ obj-$(CONFIG_TC)              += tc/
 obj-$(CONFIG_UWB)              += uwb/
 obj-$(CONFIG_USB_OTG_UTILS)    += usb/otg/
 obj-$(CONFIG_USB)              += usb/
-obj-$(CONFIG_USB_MUSB_HDRC)    += usb/musb/
+obj-$(CONFIG_USB_MUSB)         += usb/musb/
 obj-$(CONFIG_PCI)              += usb/
 obj-$(CONFIG_USB_GADGET)       += usb/gadget/
 obj-$(CONFIG_SERIO)            += input/serio/
diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index 4cbb7e4..98c0dc9 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -6,6 +6,9 @@
 comment "Enable Host or Gadget support to see Inventra options"
        depends on !USB && USB_GADGET=n
+config USB_MUSB
+       bool
+
 # (M)HDRC = (Multipoint) Highspeed Dual-Role Controller
 config USB_MUSB_HDRC
        depends on (USB || USB_GADGET)
@@ -14,6 +17,7 @@ config USB_MUSB_HDRC
        select TWL4030_USB if MACH_OMAP_3430SDP
        select TWL6030_USB if MACH_OMAP_4430SDP || MACH_OMAP4_PANDA
        select USB_OTG_UTILS
+       select USB_MUSB
        tristate 'Inventra Highspeed Dual Role Controller (TI, ADI, ...)'
        help
          Say Y here if your system has a dual role high speed USB

of course, this also needs the changes to exported symbols. But also a
bit trivial.

--
balbi
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