linux-kernel - Re: [PATCH v4 2/2] x86: intel-mid: add watchdog platform code for Merrifield

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Message-ID: <20140415211349.GA10245@roeck-us.net>
Date:	Tue, 15 Apr 2014 14:13:49 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	David Cohen <david.a.cohen@...ux.intel.com>
Cc:	wim@...ana.be, tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	linux-watchdog@...r.kernel.org, gnomes@...rguk.ukuu.org.uk
Subject: Re: [PATCH v4 2/2] x86: intel-mid: add watchdog platform code for
 Merrifield

On Tue, Apr 15, 2014 at 01:09:00PM -0700, David Cohen wrote:
> On Tue, Apr 15, 2014 at 01:06:06PM -0700, David Cohen wrote:
> > This patch adds platform code for Intel Merrifield.
> > Since the watchdog is not part of SFI table, we have no other option but
> > to manually register watchdog's platform device (argh!).
> > 
> > Signed-off-by: David Cohen <david.a.cohen@...ux.intel.com>
> > ---
> >  arch/x86/platform/intel-mid/device_libs/Makefile   |  1 +
> >  .../platform/intel-mid/device_libs/platform_wdt.c  | 66 ++++++++++++++++++++++
> >  2 files changed, 67 insertions(+)
> >  create mode 100644 arch/x86/platform/intel-mid/device_libs/platform_wdt.c
> > 
> > diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile
> > index 097e7a7940d8..af9307f2cc28 100644
> > --- a/arch/x86/platform/intel-mid/device_libs/Makefile
> > +++ b/arch/x86/platform/intel-mid/device_libs/Makefile
> > @@ -20,3 +20,4 @@ obj-$(subst m,y,$(CONFIG_DRM_MEDFIELD)) += platform_tc35876x.o
> >  obj-$(subst m,y,$(CONFIG_SERIAL_MRST_MAX3110)) += platform_max3111.o
> >  # MISC Devices
> >  obj-$(subst m,y,$(CONFIG_KEYBOARD_GPIO)) += platform_gpio_keys.o
> > +obj-$(subst m,y,$(CONFIG_INTEL_MID_WATCHDOG)) += platform_wdt.o
> > diff --git a/arch/x86/platform/intel-mid/device_libs/platform_wdt.c b/arch/x86/platform/intel-mid/device_libs/platform_wdt.c
> > new file mode 100644
> > index 000000000000..4b0434b54aff
> > --- /dev/null
> > +++ b/arch/x86/platform/intel-mid/device_libs/platform_wdt.c
> > @@ -0,0 +1,66 @@
> > +/*
> > + * platform_wdt.c: Watchdog platform library file
> > + *
> > + * (C) Copyright 2014 Intel Corporation
> > + * Author: David Cohen <david.a.cohen@...ux.intel.com>
> > + *
> > + * This program is free software; you can redistribute it and/or
> > + * modify it under the terms of the GNU General Public License
> > + * as published by the Free Software Foundation; version 2
> > + * of the License.
> > + */
> > +
> > +#include <linux/init.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/platform_data/intel-mid_wdt.h>
> > +#include <asm/intel-mid.h>
> > +
> > +#define TANGIER_EXT_TIMER0_MSI 15
> > +
> > +static struct platform_device wdt_dev = {
> > +	.name = "intel_mid_wdt",
> > +	.id = -1,
> > +};
> > +
> > +static int tangier_probe(struct platform_device *pdev)
> > +{
> > +	int ioapic;
> > +	struct io_apic_irq_attr irq_attr = { 0 };
> > +
> > +	ioapic = mp_find_ioapic(TANGIER_EXT_TIMER0_MSI);
> 
> Forgot remove this hardcoded irq number. I'll send v4.1 of this patch.
> 
> BR, David
> 
> > +	if (ioapic >= 0) {
> > +		int ret;
> > +		irq_attr.ioapic = ioapic;
> > +		irq_attr.ioapic_pin = TANGIER_EXT_TIMER0_MSI;
> > +		irq_attr.trigger = 1;
> > +		irq_attr.polarity = 0; /* Active high */
> > +		ret = io_apic_set_pci_routing(NULL, TANGIER_EXT_TIMER0_MSI,
> > +					      &irq_attr);

Here is another one, just in case you missed it.

Guenter
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