linux-kernel - Re: [PATCH v3] OMAP1: AMS

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Message-Id: <200908101112.49447.jkrzyszt@tis.icnet.pl>
Date:	Mon, 10 Aug 2009 11:12:48 +0200
From:	Janusz Krzysztofik <jkrzyszt@....icnet.pl>
To:	Jonathan McDowell <noodles@...th.li>,
	Tony Lindgren <tony@...mide.com>
Cc:	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	"linux-arm-kernel@...ts.arm.linux.org.uk" 
	<linux-arm-kernel@...ts.arm.linux.org.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] OMAP1: AMS_DELTA: add modem support

Jonathan, Tony,

Any chance for this patch ready for 2.6.32 inclusion? Or maybe v2, that has no 
external dependencies and can be updated later to v3 when Vikram's changes 
get accepted upstream?

Thanks,
Janusz

Monday 06 July 2009 12:24:27 Janusz Krzysztofik wrote:
> This patch adds support for modem device found on Amstrad E3 (Delta) board.
>
> Based on earlier patch by Jonathan McDowell, available at
> http://the.earth.li/pub/e3/2.6.19/ams-delta-modem.patch.
> Modified after Ladislav Michl's arch/arm/mach-omap1/board-voiceblue.c.
>
> This version, unlike v2, is dependent on 8250 driver changes getting
> accepted upstream:
> Refer: http://patchwork.kernel.org/patch/31884/
>
> Signed-off-by: Janusz Krzysztofik <jkrzyszt@....icnet.pl>
> ---
> Registering the modem platform device from a separate arch_initcall (and
> not from init_machine() callback) preserves serial console port at ttyS0.
>
> OMAP mux pin set up just for case if Amstrad bootloader is ever replaced.
>
> Warning:
> could cause compilation break if 8250 patch is not integrated first
>
> --- linux-2.6.31-rc1/arch/arm/mach-omap1/board-ams-delta.c.orig	2009-07-04
> 16:39:37.000000000 +0200 +++
> linux-2.6.31-rc1/arch/arm/mach-omap1/board-ams-delta.c	2009-07-05
> 13:41:08.000000000 +0200 @@ -15,8 +15,11 @@
>  #include <linux/kernel.h>
>  #include <linux/init.h>
>  #include <linux/input.h>
> +#include <linux/interrupt.h>
>  #include <linux/platform_device.h>
> +#include <linux/serial_8250.h>
>
> +#include <asm/serial.h>
>  #include <mach/hardware.h>
>  #include <asm/mach-types.h>
>  #include <asm/mach/arch.h>
> @@ -235,6 +238,41 @@ static void __init ams_delta_init(void)
>  	platform_add_devices(ams_delta_devices, ARRAY_SIZE(ams_delta_devices));
>  }
>
> +static struct plat_serial8250_port ams_delta_modem_ports[] = {
> +	{
> +		.membase	= (void *) AMS_DELTA_MODEM_VIRT,
> +		.mapbase	= AMS_DELTA_MODEM_PHYS,
> +		.irq		= -EINVAL, /* changed later */
> +		.flags		= UPF_BOOT_AUTOCONF,
> +		.irqflags	= IRQF_TRIGGER_RISING,
> +		.iotype		= UPIO_MEM,
> +		.regshift	= 1,
> +		.uartclk	= BASE_BAUD * 16,
> +	},
> +	{ },
> +};
> +
> +static struct platform_device ams_delta_modem_device = {
> +	.name	= "serial8250",
> +	.id	= PLAT8250_DEV_PLATFORM1,
> +	.dev		= {
> +		.platform_data = ams_delta_modem_ports,
> +	},
> +};
> +
> +static int __init ams_delta_modem_init(void)
> +{
> +	omap_cfg_reg(M14_1510_GPIO2);
> +	ams_delta_modem_ports[0].irq = gpio_to_irq(2);
> +
> +	ams_delta_latch2_write(
> +		AMS_DELTA_LATCH2_MODEM_NRESET | AMS_DELTA_LATCH2_MODEM_CODEC,
> +		AMS_DELTA_LATCH2_MODEM_NRESET | AMS_DELTA_LATCH2_MODEM_CODEC);
> +
> +	return platform_device_register(&ams_delta_modem_device);
> +}
> +arch_initcall(ams_delta_modem_init);
> +
>  static void __init ams_delta_map_io(void)
>  {
>  	omap1_map_common_io();


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