From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew McClintock 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 Message-ID: References: <1458770712-10880-1-git-send-email-mmcclint@codeaurora.org> <1458770712-10880-8-git-send-email-mmcclint@codeaurora.org> <20160325162326.GA25767@roeck-us.net> Mime-Version: 1.0 (Mac OS X Mail 9.2 \(3112\)) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20160325162326.GA25767-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org> Sender: linux-watchdog-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Guenter Roeck Cc: andy.gross-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, "qca-upstream.external" , Wim Van Sebroeck , "open list:WATCHDOG DEVICE DRIVERS" , open list List-Id: linux-arm-msm@vger.kernel.org > On Mar 25, 2016, at 11:23 AM, Guenter Roeck wrot= e: >=20 >> -#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[] =3D { >> + [WDT_RST] =3D 0x38, >> + [WDT_EN] =3D 0x40, >> + [WDT_BITE_TIME] =3D 0x5C, >> +}; >> + >> +static const u32 reg_offset_data_kpss[] =3D { >> + [WDT_RST] =3D 0x4, >> + [WDT_EN] =3D 0x8, >=20 > Does this work ? In the datasheet I have in front of me (APQ8064), th= e 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 0x0= 8 (eg > LPASS_QDSP6SS_WDOG_UNMASKED_INT_EN), bit 0 enables interrupts and bit= 1 is > undefined. I honestly don=E2=80=99t see anything at 0x8 for either blocks that loo= ks like this. For the new block bit 0 is enabling and bit 1 enabled int= errupts. > 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 firs= t 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=E2=80=99s called APCS_KPSS_WDT and it=E2=80=99s reall= y just a watchdog block. I kept the same driver because the register=E2=80=99s currently in use = were compatible. By the way, I tested this on an IPQ806x and IPQ4019 bo= th new and old blocks. Let me know if you need more details. -M-- To unsubscribe from this list: send the line "unsubscribe linux-watchdo= g" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html