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Mon, 9 Apr 2018 09:43:04 -0400 Received: from muru.com ([72.249.23.125]:35878 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751548AbeDINnE (ORCPT ); Mon, 9 Apr 2018 09:43:04 -0400 Date: Mon, 9 Apr 2018 06:42:59 -0700 From: Tony Lindgren To: Pavel Machek Cc: Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, Alan Cox , Dan Williams , Jiri Prchal , Jiri Slaby , Marcel Partap , Merlijn Wajer , Michael Nazzareno Trimarchi , Michael Scott , Peter Hurley , Russ Gorby , Sascha Hauer , Sebastian Reichel Subject: Re: [PATCH 1/2] tty: n_gsm: Fix long delays with control frame timeouts in ADM mode Message-ID: <20180409134259.GO5700@atomide.com> References: <20180407171951.122759-1-tony@atomide.com> <20180408090259.GA8185@amd> <20180408165038.GM5700@atomide.com> <20180408190600.GA24342@amd> <20180408235740.GN5700@atomide.com> <20180409105407.GA15315@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180409105407.GA15315@amd> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-serial-owner@vger.kernel.org X-Mailing-List: linux-serial@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: * Pavel Machek [180409 10:56]: > Ok, I should have all that enabled. But droid4-ngsm still fails: > > user@devuan:/my/droid4-ngsm$ sudo ./droid4-ngsm > Starting ngsm.. > Testing ngsm.. > Could not open /dev/gsmtty1: Level 2 halted > Trying to start ngsm again: Level 2 halted > Starting ngsm.. I guess you must have phy-mapphone-mdm6600 enabled as you a have working modem over USB. What do you see in dmesg if you enable n_gsm debug with modprobe n_gsm debug=0xff or on kernel cmdline? > commit 984c7706ff180e33096c57183435d925cb644576 says: > > ARM: dts: omap4-droid4: Configure uart1 pins > > These are needed to use the n_gsm driver for TS 27.010 UART > multiplexing. Note that support for the OOB wake gpio is still > missing so the UART is not yet usable for n_gsm. > > ...am I still missing the OOB wake gpio support? We can get away without OOB wake gpio for a while as mdm6600 is not yet suspended over USB. But if you have manually suspended mdm6600 USB interface via /sys, then it won't respond properly on n_gsm either. Regards, Tony