linux-kernel - Re: [PATCH v3 1/2] ARM: dts: bcm5301x: Add TWD WD Support to DT

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Date:   Sat, 18 Mar 2017 11:36:02 +0100
From:   Rafał Miłecki <zajec5@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>,
        Jon Mason <jon.mason@...adcom.com>,
        Hauke Mehrtens <hauke@...ke-m.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Jon Mason <jonmason@...adcom.com>
Subject: Re: [PATCH v3 1/2] ARM: dts: bcm5301x: Add TWD WD Support to DT

On 03/15/2017 10:53 PM, Florian Fainelli wrote:
> On 03/06/2017 08:24 AM, Jon Mason wrote:
>> From: Jon Mason <jonmason@...adcom.com>
>>
>> Add support for the ARM TWD Watchdog to the bcm5301x device tree.  The
>> ARM TWD timer allocated the register space for the WDT, so this patch
>> necessitated shrinking that.  Also, the GIC masks were added for these.
>>
>> Signed-off-by: Jon Mason <jonmason@...adcom.com>
>
> There were some minor conflicts that have been resolved, applied, thanks!

Solving conflict by removing a reg property? ;)
timer@...00 {
	compatible = "arm,cortex-a9-twd-timer";
	interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(2) |
				  IRQ_TYPE_EDGE_RISING)>;
	clocks = <&periph_clk>;
};

This may be a bad idea :P
[    0.020330] ------------[ cut here ]------------
[    0.025280] WARNING: CPU: 0 PID: 0 at arch/arm/kernel/smp_twd.c:412 twd_local_timer_of_register+0x6c/0x80()
[    0.035653] twd_local_timer_of_register failed (-12)
[    0.040924] Modules linked in:
[    0.044171] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.53 #0
[    0.050462] Hardware name: BCM5301X
[    0.054161] Backtrace:
[    0.056781] [<c0017050>] (dump_backtrace) from [<c001724c>] (show_stack+0x18/0x1c)
[    0.064831]  r7:0000019c r6:c03ea15e r5:600000d3 r4:00000000
[    0.070992] [<c0017234>] (show_stack) from [<c0181724>] (dump_stack+0x84/0xa4)
[    0.078688] [<c01816a0>] (dump_stack) from [<c0021534>] (warn_slowpath_common+0x8c/0xb8)
[    0.087294]  r5:00000009 r4:c0497f48
[    0.091188] [<c00214a8>] (warn_slowpath_common) from [<c0021598>] (warn_slowpath_fmt+0x38/0x40)
[    0.100444]  r8:c7ffe700 r7:c04b0a14 r6:c04983c0 r5:00000002 r4:c6de78f0
[    0.107721] [<c0021564>] (warn_slowpath_fmt) from [<c0464010>] (twd_local_timer_of_register+0x6c/0x80)
[    0.117629]  r3:fffffff4 r2:c03ea135
[    0.121512] [<c0463fa4>] (twd_local_timer_of_register) from [<c04760b0>] (clocksource_probe+0x54/0x94)
[    0.131410]  r5:00000002 r4:c6de78f0
[    0.135299] [<c047605c>] (clocksource_probe) from [<c046366c>] (time_init+0x30/0x38)
[    0.143532]  r5:ffffffff r4:00000000
[    0.147412] [<c046363c>] (time_init) from [<c0460be0>] (start_kernel+0x274/0x3f4)
[    0.155376] [<c046096c>] (start_kernel) from [<0000807c>] (0x807c)
[    0.161944]  r10:00000000 r9:413fc090 r8:0000406a r7:c049acd4 r6:c0488a24 r5:c0498444
[    0.170454]  r4:c04b0b20
[    0.173213] ---[ end trace f24b6c88ae00fa9a ]---