linux-kernel - [PATCH 0/2] drivers:staging:ti-st: Providing contexts

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Date:	Thu,  8 Jul 2010 08:55:15 -0500
From:	pavan_savoy@...com
To:	alan@...rguk.ukuu.org.uk, gregkh@...e.de
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	pavan_savoy@...oo.co.in, Pavan Savoy <pavan_savoy@...com>
Subject: [PATCH 0/2] drivers:staging:ti-st: Providing contexts

From: Pavan Savoy <pavan_savoy@...com>

Alan / Greg,

A small step (hopefully in right direction) to move this driver out of staging, into a right place in mainline.

The patch set has,

* Update TODO to add the requirement to remove global references.
* The 2nd patch addresses the issue by removing the global references.
To achieve this, the platform device being added from the board-XX.c inside arch/XX/ needs to expose a function'st_get_plat_device' which returns a pointer to the platform_device struct.

Now there are 3 contexts in the driver:
1. platform device/driver context - probe/remove, sysfs show/store, and rfkill ops
2. TTY context - tty_open/close/_receive since it is ldisc driver
3. Process context - st_register/_unregister/_write called from the protocol drivers registering to ST upon calling open/close on /dev/radio0, /dev/tigps sort of char devices or hci0 sort of interfaces

In platform device/driver context's dev_set_drvdata/get_drvdata is used. TTY's disc_data in TTY context and for the 3rd context and to combine 1 and 2 - the platform device exposed in board-XX.c will be used.

Pavan Savoy (2):
  drivers:staging:ti-st: Update TODO
  drivers:staging:ti-st: remove global references

 drivers/staging/ti-st/TODO      |    4 ++-
 drivers/staging/ti-st/st.h      |    5 ++-
 drivers/staging/ti-st/st_core.c |    8 ++--
 drivers/staging/ti-st/st_core.h |    2 +
 drivers/staging/ti-st/st_kim.c  |   77 +++++++++++++++++++++++++++------------
 drivers/staging/ti-st/st_kim.h  |    6 ++--
 6 files changed, 68 insertions(+), 34 deletions(-)

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