From mboxrd@z Thu Jan  1 00:00:00 1970
From: ynezz@true.cz (Petr =?iso-8859-2?Q?=A9tetiar?=)
Date: Wed, 30 Mar 2016 14:06:44 +0200
Subject: [PATCH] i.MX6 PCIe: Fix imx6_pcie_deassert_core_reset() polarity
In-Reply-To: <m3h9fuk7ik.fsf@t19.piap.pl>
References: <m3h9fuk7ik.fsf@t19.piap.pl>
Message-ID: <20160330120644.GM20367@ibawizard.net>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Krzysztof Ha?asa <khalasa@piap.pl> [2016-03-25 14:32:35]:

Cze??,

> I wonder if all boards (except maybe that Toradex set) use an active-low
> PCIe reset and are now broken. Perhaps Toradex uses active-high and thus
> works.

I'm really puzzled by this :-) With your patch applied I get following on
Toradex Apalis modules:

 DTS:         reset-gpio = <&gpio1 28 GPIO_ACTIVE_LOW>;
 dmesg:       imx6q-pcie 1ffc000.pcie: phy link never came up
 gpio:        gpio-28  (                    |reset               ) out hi
 pin voltage: 0V

 DTS:         reset-gpio = <&gpio1 28 GPIO_ACTIVE_HIGH>;
 dmesg:       ath9k 0000:01:00.0: enabling device (0140 -> 0142)
 gpio:        gpio-28  (                    |reset               ) out lo
 pin voltage: 3V3

So Toradex Apalis is actually active-high? Thanks.

-- ynezz