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Back when the Armada 370 and Armada XP initial support was introduced,
the only way to pass the clock frequency to the of_serial driver was
through a clock-frequency Device Tree property.
Thanks to 0bbeb3c3e8 ('of serial port
driver - add clk_get_rate() support'), it is possible to use the
standard 'clocks' DT property to reference the clock used for a
particular UART controller. This clock is then used by the of_serial
driver to retrieve the clock rate.
This commit modifies the SoC-level Device Tree files of Armada 370,
Armada XP, Armada 375 and Armada 38x to use this possibility. Since
there is no gatable clock for the UART controllers, we simply
reference the TCLK, which is the main SoC clock for the peripherals.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Link: https://lkml.kernel.org/r/1397806908-7550-4-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
202 lines
4.1 KiB
Plaintext
202 lines
4.1 KiB
Plaintext
/*
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* Device Tree Include file for Marvell Armada XP family SoC
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*
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* Copyright (C) 2012 Marvell
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*
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* Lior Amsalem <alior@marvell.com>
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* Gregory CLEMENT <gregory.clement@free-electrons.com>
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* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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* Ben Dooks <ben.dooks@codethink.co.uk>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*
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* Contains definitions specific to the Armada XP SoC that are not
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* common to all Armada SoCs.
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*/
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#include "armada-370-xp.dtsi"
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/ {
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model = "Marvell Armada XP family SoC";
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compatible = "marvell,armadaxp", "marvell,armada-370-xp";
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aliases {
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eth2 = ð2;
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};
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soc {
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compatible = "marvell,armadaxp-mbus", "simple-bus";
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bootrom {
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compatible = "marvell,bootrom";
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reg = <MBUS_ID(0x01, 0x1d) 0 0x100000>;
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};
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internal-regs {
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L2: l2-cache {
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compatible = "marvell,aurora-system-cache";
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reg = <0x08000 0x1000>;
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cache-id-part = <0x100>;
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wt-override;
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};
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i2c0: i2c@11000 {
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compatible = "marvell,mv78230-i2c", "marvell,mv64xxx-i2c";
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reg = <0x11000 0x100>;
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};
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i2c1: i2c@11100 {
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compatible = "marvell,mv78230-i2c", "marvell,mv64xxx-i2c";
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reg = <0x11100 0x100>;
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};
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serial@12200 {
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compatible = "snps,dw-apb-uart";
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reg = <0x12200 0x100>;
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reg-shift = <2>;
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interrupts = <43>;
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reg-io-width = <1>;
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clocks = <&coreclk 0>;
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status = "disabled";
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};
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serial@12300 {
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compatible = "snps,dw-apb-uart";
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reg = <0x12300 0x100>;
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reg-shift = <2>;
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interrupts = <44>;
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reg-io-width = <1>;
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clocks = <&coreclk 0>;
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status = "disabled";
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};
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system-controller@18200 {
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compatible = "marvell,armada-370-xp-system-controller";
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reg = <0x18200 0x500>;
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};
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gateclk: clock-gating-control@18220 {
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compatible = "marvell,armada-xp-gating-clock";
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reg = <0x18220 0x4>;
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clocks = <&coreclk 0>;
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#clock-cells = <1>;
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};
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coreclk: mvebu-sar@18230 {
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compatible = "marvell,armada-xp-core-clock";
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reg = <0x18230 0x08>;
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#clock-cells = <1>;
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};
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thermal@182b0 {
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compatible = "marvell,armadaxp-thermal";
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reg = <0x182b0 0x4
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0x184d0 0x4>;
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status = "okay";
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};
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cpuclk: clock-complex@18700 {
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#clock-cells = <1>;
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compatible = "marvell,armada-xp-cpu-clock";
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reg = <0x18700 0xA0>;
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clocks = <&coreclk 1>;
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};
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interrupt-controller@20000 {
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reg = <0x20a00 0x2d0>, <0x21070 0x58>;
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};
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timer@20300 {
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compatible = "marvell,armada-xp-timer";
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clocks = <&coreclk 2>, <&refclk>;
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clock-names = "nbclk", "fixed";
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};
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watchdog@20300 {
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compatible = "marvell,armada-xp-wdt";
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clocks = <&coreclk 2>, <&refclk>;
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clock-names = "nbclk", "fixed";
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};
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cpurst@20800 {
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compatible = "marvell,armada-370-cpu-reset";
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reg = <0x20800 0x20>;
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};
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eth2: ethernet@30000 {
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compatible = "marvell,armada-370-neta";
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reg = <0x30000 0x4000>;
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interrupts = <12>;
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clocks = <&gateclk 2>;
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status = "disabled";
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};
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usb@50000 {
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clocks = <&gateclk 18>;
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};
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usb@51000 {
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clocks = <&gateclk 19>;
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};
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usb@52000 {
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compatible = "marvell,orion-ehci";
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reg = <0x52000 0x500>;
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interrupts = <47>;
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clocks = <&gateclk 20>;
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status = "disabled";
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};
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xor@60900 {
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compatible = "marvell,orion-xor";
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reg = <0x60900 0x100
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0x60b00 0x100>;
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clocks = <&gateclk 22>;
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status = "okay";
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xor10 {
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interrupts = <51>;
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dmacap,memcpy;
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dmacap,xor;
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};
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xor11 {
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interrupts = <52>;
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dmacap,memcpy;
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dmacap,xor;
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dmacap,memset;
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};
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};
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xor@f0900 {
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compatible = "marvell,orion-xor";
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reg = <0xF0900 0x100
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0xF0B00 0x100>;
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clocks = <&gateclk 28>;
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status = "okay";
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xor00 {
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interrupts = <94>;
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dmacap,memcpy;
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dmacap,xor;
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};
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xor01 {
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interrupts = <95>;
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dmacap,memcpy;
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dmacap,xor;
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dmacap,memset;
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};
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};
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};
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};
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clocks {
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/* 25 MHz reference crystal */
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refclk: oscillator {
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compatible = "fixed-clock";
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#clock-cells = <0>;
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clock-frequency = <25000000>;
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};
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};
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};
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