linux-kernel - Re: Ingenic Timer/Counter Unit (TCU) patchset v12

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Message-ID: <CA+7wUszagtyMV3oMxAi4VqpDeFcBY5ohXZ3PrXe-X5JV21bjBw@mail.gmail.com>
Date:   Mon, 27 May 2019 13:39:18 +0200
From:   Mathieu Malaterre <malat@...ian.org>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        Lee Jones <lee.jones@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, linux-mips@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-clk@...r.kernel.org, od@...c.me
Subject: Re: Ingenic Timer/Counter Unit (TCU) patchset v12

On Tue, May 21, 2019 at 4:51 PM Paul Cercueil <paul@...pouillou.net> wrote:
>
> Hi,
>
> Here's the V12 of my patchset to add support for the Timer/Counter Unit
> (TCU) present on the JZ47xx SoCs from Ingenic.
>
> This patchset is much shorter at only 13 patches vs. 27 patches in V11;
> the remaining patches will be sent in parallel (if applicable) or as a
> follow-up patchset once this one is merged.
>
> In V11 the clocksource maintainers weren't happy with the size of the
> ingenic-timer driver, which included clocks and irqchip setup code.
> On the other hand, devicetree maintainers wanted one single node for
> the TCU hardware since it's effectively just one hardware block.
>
> In this patchset the functionality is cut in four different drivers:
> a MFD one to provide the regmap, probe the children and which provides
> several API functions; a clocks driver; a irqchip driver; a clocksource
> driver. All these drivers work with the same regmap, have the same
> compatible strings, and will probe _with the same devicetree node_.

For the series:

Tested-by: Mathieu Malaterre <malat@...ian.org>

System: MIPS Creator CI20

For reference, here is my local patch:

diff --git a/arch/mips/boot/dts/ingenic/jz4780.dtsi
b/arch/mips/boot/dts/ingenic/jz4780.dtsi
index 1bfac58da5df..e7b7da32f278 100644
--- a/arch/mips/boot/dts/ingenic/jz4780.dtsi
+++ b/arch/mips/boot/dts/ingenic/jz4780.dtsi
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <dt-bindings/clock/jz4780-cgu.h>
+#include <dt-bindings/clock/ingenic,tcu.h>
 #include <dt-bindings/dma/jz4780-dma.h>

 / {
@@ -80,6 +81,15 @@

                interrupt-parent = <&intc>;
                interrupts = <27 26 25>;
+
+               watchdog: watchdog@0 {
+                       compatible = "ingenic,jz4780-watchdog";
+                       reg = <0x0 0xc>;
+
+                       clocks = <&tcu TCU_CLK_WDT>;
+                       clock-names = "wdt";
+               };
+
        };

        rtc_dev: rtc@...03000 {
@@ -287,14 +297,6 @@
                status = "disabled";
        };

-       watchdog: watchdog@...02000 {
-               compatible = "ingenic,jz4780-watchdog";
-               reg = <0x10002000 0x10>;
-
-               clocks = <&cgu JZ4780_CLK_RTCLK>;
-               clock-names = "rtc";
-       };
-
        nemc: nemc@...10000 {
                compatible = "ingenic,jz4780-nemc";
                reg = <0x13410000 0x10000>;



> Regards,
> -Paul
>
>