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From: Roger Quadros <rogerq@ti.com>
To: <wg@grandegger.com>, <mkl@pengutronix.de>, <tony@atomide.com>
Cc: <jay.schroeder@garmin.com>, <linux-can@vger.kernel.org>,
	<linux-omap@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	Roger Quadros <rogerq@ti.com>
Subject: [PATCH 0/2] ARM: dra7: fix DCAN glitch
Date: Tue, 7 Jul 2015 17:27:55 +0300	[thread overview]
Message-ID: <1436279277-3386-1-git-send-email-rogerq@ti.com> (raw)

Hi,

If "default" pins are active for CAN then there is a slight
window during boot when CAN pins are in active mode and can
affect DRA7 CAN stability. This is because device core
automatically selects "default" before probe.

These patches change "default" pins to inactive and adds
a new "active" pin state so that we don't encounter
the glitch mentioned above.

cheers,
-roger

J.D. Schroeder (1):
  net: can: c_can: Fix default pinmux glitch at init

Roger Quadros (1):
  ARM: dts: dra7x-evm: Prevent glitch on DCAN1 pinmux

 arch/arm/boot/dts/dra7-evm.dts  |  5 +++--
 arch/arm/boot/dts/dra72-evm.dts |  5 +++--
 drivers/net/can/c_can/c_can.c   | 13 ++++++++++++-
 3 files changed, 18 insertions(+), 5 deletions(-)

-- 
2.1.4


             reply	other threads:[~2015-07-07 14:29 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-07 14:27 Roger Quadros [this message]
2015-07-07 14:27 ` [PATCH 1/2] net: can: c_can: Fix default pinmux glitch at init Roger Quadros
2015-07-07 14:33   ` Marc Kleine-Budde
2015-07-07 14:35     ` Roger Quadros
2015-07-07 14:37       ` Roger Quadros
2015-07-07 14:43         ` Marc Kleine-Budde
2015-07-08  8:09           ` Roger Quadros
2015-07-08  8:17             ` Marc Kleine-Budde
2015-07-07 15:49         ` Grygorii Strashko
2015-07-08  8:13           ` Roger Quadros
2015-07-08 10:31             ` Grygorii Strashko
2015-07-08 10:44               ` Roger Quadros
2015-07-08 11:38   ` [PATCH v2 " Roger Quadros
2015-07-09 10:58     ` Grygorii Strashko
2015-07-09 10:59       ` Marc Kleine-Budde
2015-07-09 11:19         ` Grygorii Strashko
2015-07-07 14:27 ` [PATCH 2/2] ARM: dts: dra7x-evm: Prevent glitch on DCAN1 pinmux Roger Quadros
2015-07-09 18:34   ` Marc Kleine-Budde
2015-07-12 19:18     ` Marc Kleine-Budde
2015-07-13  6:29       ` Tony Lindgren

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