From: Matthew McClintock <mmcclint-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
To: Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
Cc: andy.gross-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
"qca-upstream.external"
<qca-upstream.external-A+ZNKFmMK5xy9aJCnZT0Uw@public.gmane.org>,
Wim Van Sebroeck <wim-IQzOog9fTRqzQB+pC5nmwQ@public.gmane.org>,
"open list:WATCHDOG DEVICE DRIVERS"
<linux-watchdog-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
open list <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH 07/17] watchdog: qcom: add option for standalone watchdog not in timer block
Date: Mon, 28 Mar 2016 11:55:28 -0500 [thread overview]
Message-ID: <D54FA5B6-F170-40D3-BF0D-60D40A2C2829@codeaurora.org> (raw)
In-Reply-To: <20160325162326.GA25767-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
> On Mar 25, 2016, at 11:23 AM, Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org> wrote:
>
>> -#define WDT_RST 0x38
>> -#define WDT_EN 0x40
>> -#define WDT_BITE_TIME 0x5C
>> +enum wdt_reg {
>> + WDT_RST,
>> + WDT_EN,
>> + WDT_BITE_TIME,
>> +};
>> +
>> +static const u32 reg_offset_data_apcs_tmr[] = {
>> + [WDT_RST] = 0x38,
>> + [WDT_EN] = 0x40,
>> + [WDT_BITE_TIME] = 0x5C,
>> +};
>> +
>> +static const u32 reg_offset_data_kpss[] = {
>> + [WDT_RST] = 0x4,
>> + [WDT_EN] = 0x8,
>
> Does this work ? In the datasheet I have in front of me (APQ8064), the watchdog
> at this address uses different bits. At address 0x40 (eg GSS_A5_APCS_WDT0_EN),
0x40 is acps_tmr, and looks fine.
> bit 0 is the enable bit, and bit 1 enables interrupts. At address 0x08 (eg
> LPASS_QDSP6SS_WDOG_UNMASKED_INT_EN), bit 0 enables interrupts and bit 1 is
> undefined.
I honestly don’t see anything at 0x8 for either blocks that looks like this. For the new block bit 0 is enabling and bit 1 enabled interrupts.
> Or does "qcom,kpss-standalone" refer to some other watchdog ?
APQ8064 would be the apcs_tmr block variant which is unchanged. MSM8916 as well as IPQ4019 would use the new kpss variant.
I went with block names I found internally here, but I will be the first to admit I am terrible at names. The old block name for APQ was CPU0_ACPS_TMR (where really the watchdog is a subset of a timer block), and on the IPQ4019 it’s called APCS_KPSS_WDT and it’s really just a watchdog block.
I kept the same driver because the register’s currently in use were compatible. By the way, I tested this on an IPQ806x and IPQ4019 both new and old blocks.
Let me know if you need more details.
-M--
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next prev parent reply other threads:[~2016-03-28 16:55 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-23 22:04 [PATCH 00/17] Additional IPQ4019 platform support Matthew McClintock
2016-03-23 22:04 ` [PATCH 01/17] pinctrl: qcom: ipq4019: set ngpios to correct value Matthew McClintock
2016-03-25 21:19 ` Bjorn Andersson
2016-03-31 9:53 ` Linus Walleij
2016-03-23 22:04 ` [PATCH 02/17] pinctrl: qcom: ipq4019: fix the function enum for gpio mode Matthew McClintock
2016-03-25 21:22 ` Bjorn Andersson
2016-03-31 9:55 ` Linus Walleij
2016-03-23 22:04 ` [PATCH 03/17] pinctrl: qcom: ipq4019: fix register offsets Matthew McClintock
2016-03-25 21:31 ` Bjorn Andersson
2016-03-31 9:57 ` Linus Walleij
2016-03-23 22:04 ` [PATCH 04/17] clk: qcom: ipq4019: switch remaining defines to enums Matthew McClintock
2016-03-29 23:31 ` Stephen Boyd
2016-03-23 22:05 ` [PATCH 05/17] clk: qcom: ipq4019: add some fixed clocks for ddrppl and fepll Matthew McClintock
2016-03-29 23:31 ` Stephen Boyd
[not found] ` <1458770712-10880-1-git-send-email-mmcclint-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2016-03-23 22:05 ` [PATCH 06/17] watchdog: qcom: update device tree bindings Matthew McClintock
2016-03-23 22:26 ` Stephen Boyd
2016-03-24 15:49 ` Matthew McClintock
[not found] ` <1458770712-10880-7-git-send-email-mmcclint-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2016-03-25 14:13 ` Rob Herring
2016-03-23 22:05 ` [PATCH 09/17] watchdog: qcom: add kpss-standalone to device tree binding Matthew McClintock
2016-03-25 14:15 ` Rob Herring
2016-03-28 17:02 ` Matthew McClintock
2016-03-28 17:26 ` Rob Herring
2016-03-28 18:15 ` Guenter Roeck
[not found] ` <20160328181544.GB29820-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2016-03-28 22:22 ` Matthew McClintock
2016-03-23 22:05 ` [PATCH 15/17] qcom: ipq4019: add cpu operating points for cpufreq support Matthew McClintock
[not found] ` <1458770712-10880-16-git-send-email-mmcclint-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2016-03-23 22:33 ` Stephen Boyd
2017-03-22 14:10 ` [15/17] " Sven Eckelmann
2016-03-23 22:05 ` [PATCH 07/17] watchdog: qcom: add option for standalone watchdog not in timer block Matthew McClintock
[not found] ` <1458770712-10880-8-git-send-email-mmcclint-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2016-03-23 22:40 ` Stephen Boyd
2016-03-25 16:23 ` Guenter Roeck
[not found] ` <20160325162326.GA25767-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2016-03-28 16:55 ` Matthew McClintock [this message]
[not found] ` <D54FA5B6-F170-40D3-BF0D-60D40A2C2829-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2016-03-28 18:13 ` Guenter Roeck
2016-03-28 20:40 ` Matthew McClintock
2016-03-28 21:56 ` Guenter Roeck
[not found] ` <20160328215638.GA25221-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2016-03-28 22:21 ` Matthew McClintock
2016-03-23 22:05 ` [PATCH 08/17] watchdog: qcom: configure BARK time in addition to BITE time Matthew McClintock
[not found] ` <1458770712-10880-9-git-send-email-mmcclint-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2016-03-23 22:42 ` Stephen Boyd
2016-03-24 15:46 ` Matthew McClintock
2016-03-24 16:17 ` Guenter Roeck
2016-03-24 19:49 ` Matthew McClintock
2016-04-07 7:02 ` Guenter Roeck
2016-03-23 22:05 ` [PATCH 10/17] qcom: ipq4019: add watchdog node to ipq4019 SoC and DK01 device tree Matthew McClintock
2016-03-23 22:05 ` [PATCH 11/17] qcom: ipq4019: add support for reset via qcom,ps-hold Matthew McClintock
2016-03-23 22:05 ` [PATCH 12/17] qcom: ipq4019: add spi node to ipq4019 SoC and DK01 device tree Matthew McClintock
2016-03-23 22:05 ` [PATCH 13/17] qcom: ipq4019: add i2c " Matthew McClintock
2016-03-23 22:05 ` [PATCH 14/17] cpufreq: ipq4019: add cpufreq driver Matthew McClintock
2016-03-24 6:44 ` Viresh Kumar
2016-03-24 15:42 ` Matthew McClintock
2016-03-23 22:05 ` [PATCH 16/17] qcom: ipq4019: add crypto nodes to ipq4019 SoC and DK01 device tree Matthew McClintock
2016-03-23 22:05 ` [PATCH 17/17] qcom: ipq4019: add DMA " Matthew McClintock
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