mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-19 09:04:57 +00:00
55985e15b8
Slow down the I2C clock speed on M28 and SPS1 as it turns out the I2C block in i.MX28 can not operate stable enough with the bus running at 400kHz. Note that the driver used by Freescale runs the bus at 250kHz when 400kHz speed is selected, but the mainline Linux kernel runs the bus at actual 400kHz and that's where it is occasionally unstable. Play safe and run the bus at 100kHz. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
168 lines
3.3 KiB
Text
168 lines
3.3 KiB
Text
/*
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* Copyright (C) 2012 Marek Vasut <marex@denx.de>
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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/dts-v1/;
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/include/ "imx28.dtsi"
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/ {
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model = "SchulerControl GmbH, SC SPS 1";
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compatible = "schulercontrol,imx28-sps1", "fsl,imx28";
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memory {
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reg = <0x40000000 0x08000000>;
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};
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apb@80000000 {
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apbh@80000000 {
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pinctrl@80018000 {
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pinctrl-names = "default";
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pinctrl-0 = <&hog_pins_a>;
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hog_pins_a: hog-gpios@0 {
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reg = <0>;
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fsl,pinmux-ids = <
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0x0003 /* MX28_PAD_GPMI_D00__GPIO_0_0 */
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0x0033 /* MX28_PAD_GPMI_D03__GPIO_0_3 */
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0x0063 /* MX28_PAD_GPMI_D06__GPIO_0_6 */
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>;
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fsl,drive-strength = <0>;
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fsl,voltage = <1>;
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fsl,pull-up = <0>;
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};
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};
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ssp0: ssp@80010000 {
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compatible = "fsl,imx28-mmc";
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pinctrl-names = "default";
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pinctrl-0 = <&mmc0_4bit_pins_a>;
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bus-width = <4>;
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status = "okay";
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};
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ssp2: ssp@80014000 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,imx28-spi";
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pinctrl-names = "default";
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pinctrl-0 = <&spi2_pins_a>;
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status = "okay";
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flash: m25p80@0 {
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#address-cells = <1>;
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#size-cells = <1>;
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compatible = "everspin,mr25h256", "mr25h256";
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spi-max-frequency = <40000000>;
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reg = <0>;
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};
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};
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};
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apbx@80040000 {
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i2c0: i2c@80058000 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c0_pins_a>;
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status = "okay";
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rtc: rtc@51 {
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compatible = "nxp,pcf8563";
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reg = <0x51>;
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};
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eeprom: eeprom@52 {
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compatible = "atmel,24c64";
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reg = <0x52>;
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pagesize = <32>;
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};
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};
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duart: serial@80074000 {
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pinctrl-names = "default";
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pinctrl-0 = <&duart_pins_a>;
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status = "okay";
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};
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usbphy0: usbphy@8007c000 {
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status = "okay";
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};
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auart0: serial@8006a000 {
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pinctrl-names = "default";
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pinctrl-0 = <&auart0_pins_a>;
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status = "okay";
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};
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};
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};
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ahb@80080000 {
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usb0: usb@80080000 {
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vbus-supply = <®_usb0_vbus>;
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pinctrl-names = "default";
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pinctrl-0 = <&usbphy0_pins_b>;
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status = "okay";
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};
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mac0: ethernet@800f0000 {
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phy-mode = "rmii";
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pinctrl-names = "default";
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pinctrl-0 = <&mac0_pins_a>;
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status = "okay";
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};
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mac1: ethernet@800f4000 {
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phy-mode = "rmii";
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pinctrl-names = "default";
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pinctrl-0 = <&mac1_pins_a>;
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status = "okay";
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};
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};
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regulators {
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compatible = "simple-bus";
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reg_usb0_vbus: usb0_vbus {
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compatible = "regulator-fixed";
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regulator-name = "usb0_vbus";
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regulator-min-microvolt = <5000000>;
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regulator-max-microvolt = <5000000>;
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gpio = <&gpio3 9 0>;
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};
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};
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leds {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "gpio-leds";
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status = "okay";
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led@1 {
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label = "sps1-1:yellow:user";
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gpios = <&gpio0 6 0>;
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linux,default-trigger = "heartbeat";
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reg = <0>;
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};
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led@2 {
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label = "sps1-2:red:user";
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gpios = <&gpio0 3 0>;
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linux,default-trigger = "heartbeat";
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reg = <1>;
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};
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led@3 {
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label = "sps1-3:red:user";
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gpios = <&gpio0 0 0>;
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default-trigger = "heartbeat";
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reg = <2>;
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};
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};
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};
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