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ebc090e420
The introduction ofebf0d8dade("ath79: add new ar934x spi driver") made the SPI memory unusable on devices with very high spi-max-frequency (104 MHz). Here's how the actual clock is calculated: (AHB_CLK/((CLOCK_DIVIDER+1)*2)) where AHB_CLK is a fixed clock (e.g. 200MHz on AR9331) and CLOCK_DIVIDER is the parameter we can set. Highest clock according to this formula is AHB_CLK/2 (100MHz, but that didn't work in device tests). The next possible value is AHB_CLK/4 (50MHz). Speeds between 50 MHz and 100 MHz will be rounded down, so using values higher than 50 MHz does not provide any benefit. Consequently, this patch reduces spi-max-frequency for all devices with values higher than 50 MHz to 50 MHz (effectively, this only affects devices with 104 MHz before this patch). Tested on GL.inet GL-AR150: Boot fails with 104 MHz but is successful with both 50 MHz and 80 MHz (fast-read), where the latter two yield identical read speeds. Fixes:ebf0d8dade("ath79: add new ar934x spi driver") Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
182 lines
2.9 KiB
Plaintext
182 lines
2.9 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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/dts-v1/;
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/input/input.h>
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#include "ar9331.dtsi"
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/ {
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model = "TP-Link TL-MR3020 V1";
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compatible = "tplink,tl-mr3020-v1", "qca,ar9331";
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aliases {
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serial0 = &uart;
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led-boot = &led_wps;
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led-failsafe = &led_wps;
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led-running = &led_wps;
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led-upgrade = &led_wps;
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label-mac-device = ð0;
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};
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leds {
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compatible = "gpio-leds";
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wlan {
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label = "tp-link:green:wlan";
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gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
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linux,default-trigger = "phy0tpt";
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};
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lan {
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label = "tp-link:green:lan";
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gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
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};
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led_wps: wps {
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label = "tp-link:green:wps";
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gpios = <&gpio 26 GPIO_ACTIVE_LOW>;
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};
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led3g {
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label = "tp-link:green:3g";
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gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
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trigger-sources = <&hub_port>;
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linux,default-trigger = "usbport";
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};
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};
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keys {
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compatible = "gpio-keys";
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reset {
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label = "reset";
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linux,code = <KEY_RESTART>;
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gpios = <&gpio 11 GPIO_ACTIVE_HIGH>;
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debounce-interval = <60>;
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};
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sw1 {
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label = "sw1";
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linux,input-type = <EV_SW>;
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linux,code = <BTN_0>;
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gpios = <&gpio 18 GPIO_ACTIVE_HIGH>;
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debounce-interval = <60>;
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};
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sw2 {
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label = "sw2";
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linux,input-type = <EV_SW>;
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linux,code = <BTN_1>;
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gpios = <&gpio 20 GPIO_ACTIVE_HIGH>;
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debounce-interval = <60>;
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};
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};
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reg_usb_vbus: reg_usb_vbus {
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compatible = "regulator-fixed";
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regulator-name = "usb_vbus";
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regulator-min-microvolt = <5000000>;
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regulator-max-microvolt = <5000000>;
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gpio = <&gpio 8 GPIO_ACTIVE_HIGH>;
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enable-active-high;
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};
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};
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&ref {
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clock-frequency = <25000000>;
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};
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&uart {
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status = "okay";
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};
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&gpio {
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status = "okay";
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};
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&usb {
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#address-cells = <1>;
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#size-cells = <0>;
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dr_mode = "host";
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vbus-supply = <®_usb_vbus>;
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status = "okay";
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hub_port: port@1 {
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reg = <1>;
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#trigger-source-cells = <0>;
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};
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};
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&usb_phy {
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status = "okay";
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};
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&spi {
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status = "okay";
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num-chipselects = <1>;
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/* Spansion S25FL032PIF SPI flash */
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flash@0 {
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compatible = "jedec,spi-nor";
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spi-max-frequency = <50000000>;
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reg = <0>;
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partitions {
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compatible = "fixed-partitions";
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#address-cells = <1>;
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#size-cells = <1>;
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uboot: partition@0 {
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label = "u-boot";
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reg = <0x000000 0x020000>;
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read-only;
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};
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partition@20000 {
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compatible = "tplink,firmware";
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label = "firmware";
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reg = <0x020000 0x3c0000>;
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};
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partition@3e0000 {
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label = "config";
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reg = <0x3e0000 0x010000>;
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read-only;
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};
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art: partition@3f0000 {
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label = "art";
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reg = <0x3f0000 0x010000>;
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read-only;
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};
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};
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};
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};
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ð0 {
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status = "okay";
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mtd-mac-address = <&uboot 0x1fc00>;
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gmac-config {
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device = <&gmac>;
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switch-phy-addr-swap = <0>;
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switch-phy-swap = <0>;
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};
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};
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ð1 {
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status = "okay";
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compatible = "syscon", "simple-mfd";
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};
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&wmac {
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status = "okay";
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mtd-cal-data = <&art 0x1000>;
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mtd-mac-address = <&uboot 0x1fc00>;
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};
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