12faa35ae5
UART modules on Wondermedia SoCs are connected via a gated clock source, rather than directly to the 24Mhz reference clock. While uboot enables UART0 for debugging, other UART ports are unavailable until the clock is enabled. This patch checks that a valid clock is actually passed from devicetree, enables the clock in probe. This change removes the fallback when a clock was not specified as it doesn't apply any longer (and would only work if the UART clock was already enabled). DTSI files are updated for VT8500, WM8505 and WM8650. Signed-off-by: Tony Prisk <linux@prisktech.co.nz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
192 lines
3.7 KiB
Plaintext
192 lines
3.7 KiB
Plaintext
/*
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* wm8505.dtsi - Device tree file for Wondermedia WM8505 SoC
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*
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* Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz>
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*
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* Licensed under GPLv2 or later
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*/
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/include/ "skeleton.dtsi"
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/ {
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compatible = "wm,wm8505";
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cpus {
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cpu@0 {
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compatible = "arm,arm926ejs";
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};
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};
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soc {
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#address-cells = <1>;
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#size-cells = <1>;
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compatible = "simple-bus";
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ranges;
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interrupt-parent = <&intc0>;
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intc0: interrupt-controller@d8140000 {
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compatible = "via,vt8500-intc";
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interrupt-controller;
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reg = <0xd8140000 0x10000>;
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#interrupt-cells = <1>;
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};
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/* Secondary IC cascaded to intc0 */
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intc1: interrupt-controller@d8150000 {
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compatible = "via,vt8500-intc";
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interrupt-controller;
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#interrupt-cells = <1>;
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reg = <0xD8150000 0x10000>;
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interrupts = <56 57 58 59 60 61 62 63>;
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};
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gpio: gpio-controller@d8110000 {
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compatible = "wm,wm8505-gpio";
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gpio-controller;
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reg = <0xd8110000 0x10000>;
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#gpio-cells = <3>;
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};
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pmc@d8130000 {
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compatible = "via,vt8500-pmc";
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reg = <0xd8130000 0x1000>;
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clocks {
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#address-cells = <1>;
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#size-cells = <0>;
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ref24: ref24M {
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#clock-cells = <0>;
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compatible = "fixed-clock";
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clock-frequency = <24000000>;
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};
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clkuart0: uart0 {
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#clock-cells = <0>;
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compatible = "via,vt8500-device-clock";
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clocks = <&ref24>;
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enable-reg = <0x250>;
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enable-bit = <1>;
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};
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clkuart1: uart1 {
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#clock-cells = <0>;
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compatible = "via,vt8500-device-clock";
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clocks = <&ref24>;
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enable-reg = <0x250>;
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enable-bit = <2>;
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};
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clkuart2: uart2 {
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#clock-cells = <0>;
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compatible = "via,vt8500-device-clock";
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clocks = <&ref24>;
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enable-reg = <0x250>;
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enable-bit = <3>;
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};
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clkuart3: uart3 {
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#clock-cells = <0>;
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compatible = "via,vt8500-device-clock";
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clocks = <&ref24>;
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enable-reg = <0x250>;
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enable-bit = <4>;
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};
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clkuart4: uart4 {
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#clock-cells = <0>;
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compatible = "via,vt8500-device-clock";
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clocks = <&ref24>;
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enable-reg = <0x250>;
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enable-bit = <22>;
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};
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clkuart5: uart5 {
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#clock-cells = <0>;
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compatible = "via,vt8500-device-clock";
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clocks = <&ref24>;
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enable-reg = <0x250>;
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enable-bit = <23>;
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};
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};
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};
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timer@d8130100 {
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compatible = "via,vt8500-timer";
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reg = <0xd8130100 0x28>;
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interrupts = <36>;
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};
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ehci@d8007100 {
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compatible = "via,vt8500-ehci";
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reg = <0xd8007100 0x200>;
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interrupts = <1>;
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};
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uhci@d8007300 {
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compatible = "platform-uhci";
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reg = <0xd8007300 0x200>;
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interrupts = <0>;
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};
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fb@d8050800 {
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compatible = "wm,wm8505-fb";
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reg = <0xd8050800 0x200>;
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display = <&display>;
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default-mode = <&mode0>;
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};
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ge_rops@d8050400 {
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compatible = "wm,prizm-ge-rops";
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reg = <0xd8050400 0x100>;
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};
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uart@d8200000 {
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compatible = "via,vt8500-uart";
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reg = <0xd8200000 0x1040>;
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interrupts = <32>;
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clocks = <&clkuart0>;
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};
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uart@d82b0000 {
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compatible = "via,vt8500-uart";
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reg = <0xd82b0000 0x1040>;
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interrupts = <33>;
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clocks = <&clkuart1>;
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};
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uart@d8210000 {
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compatible = "via,vt8500-uart";
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reg = <0xd8210000 0x1040>;
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interrupts = <47>;
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clocks = <&clkuart2>;
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};
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uart@d82c0000 {
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compatible = "via,vt8500-uart";
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reg = <0xd82c0000 0x1040>;
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interrupts = <50>;
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clocks = <&clkuart3>;
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};
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uart@d8370000 {
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compatible = "via,vt8500-uart";
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reg = <0xd8370000 0x1040>;
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interrupts = <31>;
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clocks = <&clkuart4>;
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};
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uart@d8380000 {
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compatible = "via,vt8500-uart";
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reg = <0xd8380000 0x1040>;
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interrupts = <30>;
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clocks = <&clkuart5>;
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};
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rtc@d8100000 {
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compatible = "via,vt8500-rtc";
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reg = <0xd8100000 0x10000>;
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interrupts = <48>;
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};
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};
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};
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