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Message-ID: <20110315200921.GC20845@angua.secretlab.ca>
Date: Tue, 15 Mar 2011 14:09:21 -0600
From: Grant Likely <grant.likely@...retlab.ca>
To: David Daney <ddaney@...iumnetworks.com>
Cc: devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v??] MIPS: Octeon: Add device tree source files.
On Tue, Mar 15, 2011 at 12:59:30PM -0700, David Daney wrote:
> Signed-off-by: David Daney <ddaney@...iumnetworks.com>
> ---
> I have made some big changes to my device tree and wanted to try to
> get some feedback on just the dts part before sending a revised 12
> patch set.
Can I see these changes in Documentation/devicetree/bindings form please?
:-)
>
> I think I addressed all of Grant's comments from the last round.
>
> Things that are new that could use some close supervision:
>
> o gpio-controller, How is this supposed to work as a source of
> interrupts? The current Linux kernel code will not let it be an
> interrupt-parent unless it is also made an 'interrupt-controller'.
Yes, it will need to also be an interrupt controller if gpios are
being used as interrupt lines. The implementation is free to simply
pass the irqs through to the 'real' irq controller, but the properties
need to be there so that the dt parser knows what to do with it.
Alternately, you can implement it with an interrupt-map property,
which is more complex to write, but doesn't require any back end
driver support to work.
> o Some of my PHYs are now connected to the GPIO pin 5 for interrupts.
>
> o serial, I added my three UARTS. How is this supposed to be probed
> by the Linux kernel's 8250.c driver?
See drivers/tty/serial/of_serial.c
>
> o bootbus, This is a bunch (8) programmable chip selects. How should
> bus timing and width be configured for these things?
You'll probably want to set this up early in platform initialization
code. Create a binding for SoC system integration type data. Pin
muxes, CS timings, etc, and parse it during early setup.
>
> o nor flash, Connected to chip select 0. In the Linux kernel how am I
> supposed to translate the addresses across the bootbus bridge based
> on chip select?
For cs lines, I usually set #address-cells = <2> (or 3 in your case
because it is a 64 bit system) so that child addresses consist of the
cs# and an offset from the base of the cs. Then use a ranges property
to set up the translation. If the base address of the CS changes,
then only the bus ranges property needs to be modified
>
> o USB, The EHCI and OHCI controllers are shown as children of the uctl
> device which has some configurable clocks. Is this sane?
Probably.
>
> Thanks in advance for any feedback,
> David Daney
>
> arch/mips/cavium-octeon/.gitignore | 2 +
> arch/mips/cavium-octeon/Makefile | 13 +
> arch/mips/cavium-octeon/octeon_3xxx.dts | 424 +++++++++++++++++++++++++++++++
> 3 files changed, 439 insertions(+), 0 deletions(-)
> create mode 100644 arch/mips/cavium-octeon/.gitignore
> create mode 100644 arch/mips/cavium-octeon/octeon_3xxx.dts
>
> diff --git a/arch/mips/cavium-octeon/.gitignore b/arch/mips/cavium-octeon/.gitignore
> new file mode 100644
> index 0000000..39c9686
> --- /dev/null
> +++ b/arch/mips/cavium-octeon/.gitignore
> @@ -0,0 +1,2 @@
> +*.dtb.S
> +*.dtb
> diff --git a/arch/mips/cavium-octeon/Makefile b/arch/mips/cavium-octeon/Makefile
> index 19eb043..b8d4f63 100644
> --- a/arch/mips/cavium-octeon/Makefile
> +++ b/arch/mips/cavium-octeon/Makefile
> @@ -15,3 +15,16 @@ obj-y += octeon-memcpy.o
> obj-y += executive/
>
> obj-$(CONFIG_SMP) += smp.o
> +
> +DTS_FILES = octeon_3xxx.dts
> +DTB_FILES = $(patsubst %.dts, %.dtb, $(DTS_FILES))
> +
> +obj-y += $(patsubst %.dts, %.dtb.o, $(DTS_FILES))
> +
> +$(obj)/%.dtb: $(src)/%.dts
> + $(call cmd,dtc)
> +
> +# Let's keep the .dtb files around in case we want to look at them.
> +.SECONDARY: $(addprefix $(obj)/, $(DTB_FILES))
> +
> +clean-files += $(DTB_FILES) $(patsubst %.dtb, %.dtb.S, $(DTB_FILES))
> diff --git a/arch/mips/cavium-octeon/octeon_3xxx.dts b/arch/mips/cavium-octeon/octeon_3xxx.dts
> new file mode 100644
> index 0000000..29f44e0
> --- /dev/null
> +++ b/arch/mips/cavium-octeon/octeon_3xxx.dts
> @@ -0,0 +1,424 @@
> +/dts-v1/;
> +/*
> + * OCTEON 3XXX, 5XXX, 63XX device tree skeleton.
> + *
> + * This device tree is pruned and patched by early boot code before
> + * use. Because of this, it contains a super-set of the available
> + * devices and properties.
> + */
> +/ {
> + compatible = "cavium,octeon-3860";
> + #address-cells = <2>;
> + #size-cells = <2>;
> + interrupt-parent = <&ciu>;
> +
> + soc@0 {
> + compatible = "simple-bus";
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges; /* Direct mapping */
> +
> + ciu: interrupt-controller@...0000000000 {
> + compatible = "cavium,octeon-3860-ciu";
> + interrupt-controller;
> + #address-cells = <0>;
> + /* Interrupts are specified by two parts:
> + * 1) Controller register (0 or 1)
> + * 2) Bit within the register (0..63)
> + */
> + #interrupt-cells = <2>;
> + reg = <0x10700 0x00000000 0x0 0x7000>;
> + };
> +
> + gpio: gpio-controller@...0000000800 {
> + #gpio-cells = <2>;
> + compatible = "cavium,octeon-3860-gpio";
> + reg = <0x10700 0x00000800 0x0 0x100>;
> + gpio-controller;
> + /* Interrupts are specified by two parts:
> + * 1) GPIO pin number (0..15)
> + * 2) Triggering (0 - level active high
> + * 1 - level active low
> + * 2 - edge rising
> + * 3 - edge falling
> + */
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + /* The GPIO pin connect to 16 consecutive CUI bits */
> + interrupts = <0 16>; /* <0 17> <0 18> <0 19>
> + <0 20> <0 21> <0 22> <0 23>
> + <0 24> <0 25> <0 26> <0 27>
> + <0 28> <0 29> <0 30> <0 31>; */
> + };
> +
> + smi0: mdio@...0000001800 {
> + compatible = "cavium,octeon-3860-mdio";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0x11800 0x00001800 0x0 0x40>;
> +
> + phy0: ethernet-phy@0 {
> + compatible = "broadcom,bcm5241";
> + reg = <0>;
> + };
> +
> + phy1: ethernet-phy@1 {
> + compatible = "broadcom,bcm5241";
> + reg = <1>;
> + };
> +
> + phy2: ethernet-phy@2 {
> + reg = <2>;
> + compatible = "marvell,88e1149r";
> + marvell,reg-init = <3 0x10 0 0x5777>,
> + <3 0x11 0 0x00aa>,
> + <3 0x12 0 0x4105>,
> + <3 0x13 0 0x0a60>;
> + interrupt-parent = <&gpio>;
> + interrupts = <5 1>; /* Pin 5, active low */
> + };
> + phy3: ethernet-phy@3 {
> + reg = <3>;
> + compatible = "marvell,88e1149r";
> + marvell,reg-init = <3 0x10 0 0x5777>,
> + <3 0x11 0 0x00aa>,
> + <3 0x12 0 0x4105>,
> + <3 0x13 0 0x0a60>;
> + interrupt-parent = <&gpio>;
> + interrupts = <5 1>; /* Pin 5, active low */
> + };
> + phy4: ethernet-phy@4 {
> + reg = <4>;
> + compatible = "marvell,88e1149r";
> + marvell,reg-init = <3 0x10 0 0x5777>,
> + <3 0x11 0 0x00aa>,
> + <3 0x12 0 0x4105>,
> + <3 0x13 0 0x0a60>;
> + interrupt-parent = <&gpio>;
> + interrupts = <5 1>; /* Pin 5, active low */
> + };
> + phy5: ethernet-phy@5 {
> + reg = <5>;
> + compatible = "marvell,88e1149r";
> + marvell,reg-init = <3 0x10 0 0x5777>,
> + <3 0x11 0 0x00aa>,
> + <3 0x12 0 0x4105>,
> + <3 0x13 0 0x0a60>;
> + interrupt-parent = <&gpio>;
> + interrupts = <5 1>; /* Pin 5, active low */
> + };
> +
> + phy6: ethernet-phy@6 {
> + reg = <6>;
> + compatible = "marvell,88e1149r";
> + marvell,reg-init = <3 0x10 0 0x5777>,
> + <3 0x11 0 0x00aa>,
> + <3 0x12 0 0x4105>,
> + <3 0x13 0 0x0a60>;
> + };
> + phy7: ethernet-phy@7 {
> + reg = <7>;
> + compatible = "marvell,88e1149r";
> + marvell,reg-init = <3 0x10 0 0x5777>,
> + <3 0x11 0 0x00aa>,
> + <3 0x12 0 0x4105>,
> + <3 0x13 0 0x0a60>;
> + };
> + phy8: ethernet-phy@8 {
> + reg = <8>;
> + compatible = "marvell,88e1149r";
> + marvell,reg-init = <3 0x10 0 0x5777>,
> + <3 0x11 0 0x00aa>,
> + <3 0x12 0 0x4105>,
> + <3 0x13 0 0x0a60>;
> + };
> + phy9: ethernet-phy@9 {
> + reg = <9>;
> + compatible = "marvell,88e1149r";
> + marvell,reg-init = <3 0x10 0 0x5777>,
> + <3 0x11 0 0x00aa>,
> + <3 0x12 0 0x4105>,
> + <3 0x13 0 0x0a60>;
> + };
> + };
> +
> + smi1: mdio@...0000001900 {
> + compatible = "cavium,octeon-3860-mdio";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0x11800 0x00001900 0x0 0x40>;
> + };
> +
> + mix0: ethernet@...0000100000 {
> + compatible = "cavium,octeon-5750-mix";
> + reg = <0x10700 0x00100000 0x0 0x100>, /* MIX */
> + <0x11800 0xE0000000 0x0 0x300>, /* AGL */
> + <0x11800 0xE0000400 0x0 0x400>, /* AGL_SHARED */
> + <0x11800 0xE0002000 0x0 0x8>; /* AGL_PRT_CTL */
> + cell-index = <0>;
> + interrupts = <0 62>, <1 46>;
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + phy-handle = <&phy0>;
> + };
> +
> + mix1: ethernet@...0000100800 {
> + compatible = "cavium,octeon-5750-mix";
> + reg = <0x10700 0x00100800 0x0 0x100>, /* MIX */
> + <0x11800 0xE0000800 0x0 0x300>, /* AGL */
> + <0x11800 0xE0000400 0x0 0x400>, /* AGL_SHARED */
> + <0x11800 0xE0002008 0x0 0x8>; /* AGL_PRT_CTL */
> + cell-index = <1>;
> + interrupts = <1 18>, < 1 46>;
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + phy-handle = <&phy1>;
> + };
> +
> + pip: pip@...00a0000000 {
> + compatible = "cavium,octeon-3860-pip";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0x11800 0xa0000000 0x0 0x2000>;
> +
> + interface@0 {
> + compatible = "cavium,octeon-3860-pip-interface";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0>; /* interface */
> +
> + ethernet@0 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x0>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + phy-handle = <&phy2>;
> + };
> + ethernet@1 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x1>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + phy-handle = <&phy3>;
> + };
> + ethernet@2 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x2>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + phy-handle = <&phy4>;
> + };
> + ethernet@3 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x3>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + phy-handle = <&phy5>;
> + };
> + };
> +
> + interface@1 {
> + compatible = "cavium,octeon-3860-pip-interface";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <1>; /* interface */
> +
> + ethernet@0 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x0>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + phy-handle = <&phy6>;
> + };
> + ethernet@1 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x1>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + phy-handle = <&phy7>;
> + };
> + ethernet@2 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x2>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + phy-handle = <&phy8>;
> + };
> + ethernet@3 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x3>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + phy-handle = <&phy9>;
> + };
> + };
> +
> + interface@2 { /* DPI interface. */
> + compatible = "cavium,octeon-3860-pip-interface";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <2>; /* interface */
> +
> + ethernet@0 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x0>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + };
> + ethernet@1 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x1>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + };
> + ethernet@2 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x2>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + };
> + ethernet@3 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x3>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + };
> + };
> +
> + interface@3 { /* Loop interface. */
> + compatible = "cavium,octeon-3860-pip-interface";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <3>; /* interface */
> +
> + ethernet@0 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x0>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + };
> + ethernet@1 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x1>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + };
> + ethernet@2 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x2>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + };
> + ethernet@3 {
> + compatible = "cavium,octeon-3860-pip-port";
> + reg = <0x3>; /* Port */
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + };
> + };
> + };
> +
> + twsi0: i2c@...0000001000 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + compatible = "cavium,octeon-3860-twsi";
> + reg = <0x11800 0x00001000 0x0 0x200>;
> + interrupts = <0 45>;
> + clock-rate = <100000>;
> +
> + rtc@68 {
> + compatible = "dallas,ds1337";
> + reg = <0x68>;
> + };
> + tmp@4c {
> + compatible = "ti,tmp421";
> + reg = <0x4c>;
> + };
> + };
> +
> + twsi1: i2c@...0000001200 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + compatible = "cavium,octeon-3860-twsi";
> + reg = <0x11800 0x00001200 0x0 0x200>;
> + interrupts = <0 59>;
> + clock-rate = <100000>;
> + };
> +
> + uart0: serial@...0000000800 {
> + compatible = "cavium,octeon-3860-uart","ns16550";
> + reg = <0x11800 0x00000800 0x0 0x400>;
> + clock-frequency = <0>;
> + current-speed = <115200>;
> + reg-shift = <3>;
> + interrupts = <0 34>;
> + };
> +
> + uart1: serial@...0000000c00 {
> + compatible = "cavium,octeon-3860-uart","ns16550";
> + reg = <0x11800 0x00000c00 0x0 0x400>;
> + clock-frequency = <0>;
> + current-speed = <115200>;
> + reg-shift = <3>;
> + interrupts = <0 35>;
> + };
> +
> + uart2: serial@...0000000400 {
> + compatible = "cavium,octeon-3860-uart","ns16550";
> + reg = <0x11800 0x00000400 0x0 0x400>;
> + clock-frequency = <0>;
> + current-speed = <115200>;
> + reg-shift = <3>;
> + interrupts = <1 16>;
> + };
> +
> + bootbus: bootbus@...0000000000 {
> + compatible = "cavium,octeon-3860-bootbus";
> + reg = <0x10000 0x00000000 0x1 0x00000000>;
> + /* The chip select number */
> + #address-cells = <1>;
> + /* The size of the chip select region */
> + #size-cells = <1>;
> +
> + flash0: nor@0 {
> + compatible = "cfi-flash";
> + reg = <0 0x800000>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> +
> + partition@0 {
> + label = "firmware";
> + reg = <0x0 0x400000>;
> + read-only;
> + };
> +
> + partition@...000 {
> + label = "data";
> + reg = <0x400000 0x400000>;
> + read-only;
> + };
> + };
> + };
> +
> + uctl: uctl@...006f000000 {
> + compatible = "cavium,octeon-6335-uctl";
> + reg = <0x11800 0x6f000000 0x0 0x100>;
> + ranges; /* Direct mapping */
> + #address-cells = <2>;
> + #size-cells = <2>;
> + /* 12MHz, 24MHz and 48MHz allowed */
> + refclk-frequency = <24000000>;
> + /* Either "crystal" or "external" */
> + refclk-type = "crystal";
> +
> + ehci@...0000000000 {
> + compatible = "cavium,octeon-6335-ehci","usb-ehci";
> + reg = <0x16f00 0x00000000 0x0 0x100>;
> + interrupts = <0 56>;
> + big-endian-regs;
> + };
> + ohci@...0000000400 {
> + compatible = "cavium,octeon-6335-ohci","usb-ohci";
> + reg = <0x16f00 0x00000400 0x0 0x100>;
> + interrupts = <0 56>;
> + big-endian-regs;
> + };
> + };
> + };
> +
> + aliases {
> + mix0 = &mix0;
> + mix1 = &mix1;
> + pip = &pip;
> + smi0 = &smi0;
> + smi1 = &smi1;
> + twsi0 = &twsi0;
> + twsi1 = &twsi1;
> + uart0 = &uart0;
> + uart1 = &uart1;
> + uart2 = &uart2;
> + flash0 = &flash0;
> + };
> + };
> --
> 1.7.2.3
>
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