From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Bogendoerfer Subject: Re: [PATCH 8/8] 8250: add Texas Instruments AR7 internal UART Date: Thu, 11 Jun 2009 11:30:22 +0200 Message-ID: <20090611093022.GA14510@alpha.franken.de> References: <200906041622.47591.florian@openwrt.org> <20090604222020.GA14843@alpha.franken.de> <200906111028.41222.florian@openwrt.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from elvis.franken.de ([193.175.24.41]:48570 "EHLO elvis.franken.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757102AbZFKJa3 (ORCPT ); Thu, 11 Jun 2009 05:30:29 -0400 Content-Disposition: inline In-Reply-To: <200906111028.41222.florian@openwrt.org> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Florian Fainelli Cc: Linux-MIPS , Ralf Baechle , linux-kernel@vger.kernel.org, Alan Cox , linux-serial@vger.kernel.org On Thu, Jun 11, 2009 at 10:28:39AM +0200, Florian Fainelli wrote: > Le Friday 05 June 2009 00:20:20 Thomas Bogendoerfer, vous avez =E9cri= t=A0: > > On Thu, Jun 04, 2009 at 04:22:46PM +0200, Florian Fainelli wrote: > > > We discussed that in private, there are a couple of things > > > to fix in order to get 8250 working properly with TI AR7 HW. > > > If you can still merge that bit, this would ease future work, tha= nks ! > > > > I still have a tree here, which works without any changes to the 82= 50 > > serial driver on a TNETD7300 device. >=20 > Could you show me how you register the 8250 driver ? Without the 8250= -specific=20 static struct plat_serial8250_port uart0_data =3D { .mapbase =3D AR7_REGS_UART0, .irq =3D AR7_IRQ_UART0, .regshift =3D 2, .iotype =3D UPIO_MEM, .flags =3D UPF_BOOT_AUTOCONF | UPF_IOREMAP, }; uart_port[0].type =3D PORT_16550A; uart_port[0].line =3D 0; uart_port[0].irq =3D AR7_IRQ_UART0; uart_port[0].uartclk =3D ar7_bus_freq() / 2; uart_port[0].iotype =3D UPIO_MEM; uart_port[0].mapbase =3D AR7_REGS_UART0 + 3; uart_port[0].membase =3D ioremap(uart_port[0].mapbase, 256); uart_port[0].regshift =3D 2; res =3D early_serial_setup(&uart_port[0]); if (res) return res; the +3 comes from the fact, that this machine is configured to run big endian. Here is the boot log: Serial: 8250/16550 driver $Revision: 1.90 $ 2 ports, IRQ sharing disabl= ed serial8250: ttyS0 at MMIO 0x8610e03 (irq =3D 15) is a 16550A console handover: boot [early0] -> real [ttyS0] serial8250: ttyS1 at MMIO 0x8610f00 (irq =3D 19) is a 16550A loop: module loaded =46ixed MDIO Bus: probed ttyS1 uses the wrong address, but there is nothing connected to that port on the box. Do you see the problem on TNETD7200 devices as well ? Thomas. --=20 Crap can work. Given enough thrust pigs will fly, but it's not necessar= y a good idea. [ RFC1925, 2.= 3 ] -- To unsubscribe from this list: send the line "unsubscribe linux-serial"= in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html