linux-kernel - Re: [PATCH] reset: ti-rstctrl: use the reset-simple driver

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Message-ID: <20180119234938.GB4180@atomide.com>
Date:   Fri, 19 Jan 2018 15:49:38 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Suman Anna <s-anna@...com>
Cc:     Philipp Zabel <p.zabel@...gutronix.de>,
        Philipp Zabel <philipp.zabel@...il.com>,
        Paul Parsons <lost.distance@...oo.com>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-omap@...r.kernel.org, Dave Gerlach <d-gerlach@...com>,
        Mark Rutland <mark.rutland@....com>, Nishant Menon <nm@...com>,
        Rob Herring <robh+dt@...nel.org>, Tero Kristo <t-kristo@...com>
Subject: Re: [PATCH] reset: ti-rstctrl: use the reset-simple driver

* Suman Anna <s-anna@...com> [180119 23:30]:
> On 01/19/2018 03:33 PM, Tony Lindgren wrote:
> > OK let's do some tests on that, I'll take a look at doing a dts
> > file over next few weeks.
> 
> You can look up the patches folder in the above repo, there are some
> example nodes there already, they are rather straight-forward.

Just for reference, here's what I played with but keep getting
-EPROBE_DEFER somewhere during init.

Regards,

Tony

	prm: prm@...0 {
		...
		ranges = <0 0x6000 0x3000>;

		prm_dsp: prm@400 {
			compatible = "simple-bus";
			#address-cells = <1>;
			#size-cells = <1>;
			ranges = <0 0x400 0x100>;

			dsp_rstctrl: rstctrl@10 {
				compatible = "ti,rstctrl";
				reg = <0x10 0x4>;
				#reset-cells = <1>;
			};
		};
		...
	};

	target-module@...66000 {
		compatible = "ti,sysc-omap2", "ti,sysc";
		ti,hwmods = "mmu_dsp";
		reg = <0x4a066000 0x4>,
		      <0x4a066010 0x4>,
		      <0x4a066014 0x4>;
		reg-names = "rev", "sysc", "syss";
		ti,sysc-mask = <(SYSC_OMAP2_CLOCKACTIVITY |
				 SYSC_OMAP2_SOFTRESET |
				 SYSC_OMAP2_AUTOIDLE)>;
		ti,sysc-sidle = <SYSC_IDLE_FORCE>,
				<SYSC_IDLE_NO>,
				<SYSC_IDLE_SMART>;
		clocks = <&tesla_clkctrl OMAP4_DSP_CLKCTRL 0>;
		clock-names = "fck";
		resets = <&dsp_rstctrl 1>,
			 <&dsp_rstctrl 0>;
		reset-names = "rst2", "rst1";
		#address-cells = <1>;
		#size-cells = <1>;
		ranges = <0 0x4a066000 0x1000>;

		mmu_dsp: mmu@0 {
			compatible = "ti,omap4-iommu";
			reg = <0 0x100>;
			interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
			#iommu-cells = <0>;
		};
	};