From: Avinash.H.M <avinashhm@ti.com>
Date: Sun, 10 Jul 2011 11:27:16 +0000 (-0600)
Subject: OMAP: hwmod: fix the i2c-reset timeout during bootup
X-Git-Tag: v3.1-rc1~152^2^2^2^3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d3c55fd4f0f94a9455d30df9414ddb0f755f402;p=pandora-kernel.git

OMAP: hwmod: fix the i2c-reset timeout during bootup

The sequence of _ocp_softreset doesn't work for i2c. The i2c module has a
special sequence to reset the module. The sequence is
 - Disable the I2C.
 - Write to SOFTRESET bit.
 - Enable the I2C.
 - Poll on the RESETDONE bit.
The sequence is implemented as a function and the i2c_class is updated with
the correct 'reset' pointer.  omap_hwmod_softreset function is implemented
which triggers the softreset by writing into sysconfig register. On following
this sequence, i2c module resets properly and timeouts are not seen.

Cc: Rajendra Nayak <rnayak@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Signed-off-by: Avinash.H.M <avinashhm@ti.com>
[paul@pwsan.com: combined this patch with a patch to remove
 HWMOD_INIT_NO_RESET from the 44xx hwmod flags; change register
 offset conditional code to use the IP block revision; minor code
 cleanup]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
---

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