From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Chris Brandt <chris.brandt@renesas.com>
Cc: Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
linux-spi <linux-spi@vger.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
linux-clk <linux-clk@vger.kernel.org>,
Mason Yang <masonccyang@mxic.com.tw>,
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Subject: Re: [PATCH 2/6] ARM: dts: r7s72100: Add SPIBSC clocks
Date: Tue, 3 Dec 2019 19:42:49 +0100 [thread overview]
Message-ID: <CAMuHMdXUVdG_PMQEpz=QWLCaabfK8Mc41zFiymXJ4Rx_C2gzdg@mail.gmail.com> (raw)
In-Reply-To: <20191203034519.5640-3-chris.brandt@renesas.com>
Hi Chris,
On Tue, Dec 3, 2019 at 4:46 AM Chris Brandt <chris.brandt@renesas.com> wrote:
> The SPIBSC-0 clock is marked as critical because for XIP systems, this
> is the SPI flash controller it will boot from and the kernel will also
> be running from so it cannot be turned off.
>
> Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Thanks for your patch!
> --- a/arch/arm/boot/dts/r7s72100.dtsi
> +++ b/arch/arm/boot/dts/r7s72100.dtsi
> @@ -101,6 +101,26 @@
> #size-cells = <1>;
> ranges;
>
> + spibsc0: spi@3fefa000 {
> + compatible = "renesas,r7s72100-spibsc", "renesas,spibsc";
> + reg = <0x3fefa000 0x100>, <0x18000000 0x4000000>;
The second region conflicts with the XIP flash@18000000 in
arch/arm/boot/dts/r7s72100-gr-peach.dts.
Yes, I know it is the same device ;-)
> + clocks = <&mstp9_clks R7S72100_CLK_SPIBSC0>;
> + power-domains = <&cpg_clocks>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> +
> + spibsc1: spi@3fefb000 {
> + compatible = "renesas,r7s72100-spibsc", "renesas,spibsc";
> + reg = <0x3fefb000 0x100>, <0x1c000000 0x4000000>;
> + clocks = <&mstp9_clks R7S72100_CLK_SPIBSC1>;
> + power-domains = <&cpg_clocks>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + status = "disabled";
> + };
> +
> L2: cache-controller@3ffff000 {
> compatible = "arm,pl310-cache";
> reg = <0x3ffff000 0x1000>;
> @@ -467,11 +487,13 @@
> #clock-cells = <1>;
> compatible = "renesas,r7s72100-mstp-clocks", "renesas,cpg-mstp-clocks";
> reg = <0xfcfe0438 4>;
> - clocks = <&p0_clk>, <&p0_clk>, <&p0_clk>, <&p0_clk>;
> + clocks = <&p0_clk>, <&p0_clk>, <&p0_clk>, <&p0_clk>, <&b_clk>, <&b_clk>;
> clock-indices = <
> R7S72100_CLK_I2C0 R7S72100_CLK_I2C1 R7S72100_CLK_I2C2 R7S72100_CLK_I2C3
> + R7S72100_CLK_SPIBSC0 R7S72100_CLK_SPIBSC1
> >;
> - clock-output-names = "i2c0", "i2c1", "i2c2", "i2c3";
> + clock-output-names = "i2c0", "i2c1", "i2c2", "i2c3", "spibsc0", "spibsc1";
> + clock-critical = <4>; /* spibsc0 */
Iff we go this clock-critical route, I think this should be specified in the
board-specific .dts instead of in the SoC-specific .dtsi.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
next prev parent reply other threads:[~2019-12-03 18:43 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-03 3:45 [PATCH 0/6] spi: Add Renesas SPIBSC controller Chris Brandt
2019-12-03 3:45 ` [PATCH 1/6] clk: renesas: mstp: Add critical clock from device tree support Chris Brandt
2019-12-03 18:32 ` Geert Uytterhoeven
2019-12-03 18:46 ` Chris Brandt
2019-12-03 18:51 ` Geert Uytterhoeven
2019-12-03 3:45 ` [PATCH 2/6] ARM: dts: r7s72100: Add SPIBSC clocks Chris Brandt
2019-12-03 18:42 ` Geert Uytterhoeven [this message]
2019-12-03 18:57 ` Chris Brandt
2019-12-03 19:12 ` Geert Uytterhoeven
2019-12-04 8:38 ` Lee Jones
2019-12-04 9:03 ` Geert Uytterhoeven
2019-12-04 9:47 ` Lee Jones
2019-12-04 11:00 ` Chris Brandt
2019-12-03 3:45 ` [PATCH 3/6] clk: renesas: r7s9210: Add SPIBSC clock Chris Brandt
2019-12-03 18:49 ` Geert Uytterhoeven
2019-12-03 19:09 ` Chris Brandt
2019-12-03 20:40 ` Geert Uytterhoeven
2019-12-04 3:09 ` Chris Brandt
2019-12-03 3:45 ` [PATCH 4/6] spi: Add SPIBSC driver Chris Brandt
2019-12-03 14:19 ` Mark Brown
2019-12-03 15:00 ` Chris Brandt
2019-12-03 18:29 ` Geert Uytterhoeven
2019-12-04 11:25 ` Mark Brown
2019-12-04 12:14 ` Geert Uytterhoeven
2019-12-04 15:51 ` Chris Brandt
2019-12-04 16:49 ` Mark Brown
2019-12-03 18:28 ` Geert Uytterhoeven
2019-12-04 11:18 ` Mark Brown
2019-12-04 22:12 ` Chris Brandt
2019-12-03 3:45 ` [PATCH 5/6] ARM: dts: r7s9210: Add SPIBSC Device support Chris Brandt
2019-12-03 18:59 ` Geert Uytterhoeven
2019-12-03 22:38 ` Chris Brandt
2019-12-04 7:57 ` Geert Uytterhoeven
2019-12-04 11:04 ` Chris Brandt
2019-12-03 3:45 ` [PATCH 6/6] dt-bindings: spi: Document Renesas SPIBSC bindings Chris Brandt
2019-12-03 9:14 ` Sergei Shtylyov
2019-12-03 13:27 ` Chris Brandt
2019-12-03 16:04 ` Sergei Shtylyov
2019-12-03 16:35 ` Chris Brandt
2019-12-03 18:57 ` Geert Uytterhoeven
2019-12-03 20:39 ` Geert Uytterhoeven
2019-12-04 2:54 ` Chris Brandt
2019-12-04 8:56 ` Geert Uytterhoeven
2019-12-04 13:31 ` Chris Brandt
2019-12-05 15:48 ` Geert Uytterhoeven
2019-12-05 16:00 ` Chris Brandt
2019-12-04 8:40 ` Geert Uytterhoeven
2019-12-03 22:33 ` Chris Brandt
2019-12-04 8:43 ` Geert Uytterhoeven
2019-12-04 11:19 ` Chris Brandt
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