linux/arch/arm/boot/dts/imx28-sps1.dts
Marek Vasut 55985e15b8 ARM: mxs: Slow down the I2C clock speed
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>
2013-04-03 09:34:01 +08:00

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/*
* Copyright (C) 2012 Marek Vasut <marex@denx.de>
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/dts-v1/;
/include/ "imx28.dtsi"
/ {
model = "SchulerControl GmbH, SC SPS 1";
compatible = "schulercontrol,imx28-sps1", "fsl,imx28";
memory {
reg = <0x40000000 0x08000000>;
};
apb@80000000 {
apbh@80000000 {
pinctrl@80018000 {
pinctrl-names = "default";
pinctrl-0 = <&hog_pins_a>;
hog_pins_a: hog-gpios@0 {
reg = <0>;
fsl,pinmux-ids = <
0x0003 /* MX28_PAD_GPMI_D00__GPIO_0_0 */
0x0033 /* MX28_PAD_GPMI_D03__GPIO_0_3 */
0x0063 /* MX28_PAD_GPMI_D06__GPIO_0_6 */
>;
fsl,drive-strength = <0>;
fsl,voltage = <1>;
fsl,pull-up = <0>;
};
};
ssp0: ssp@80010000 {
compatible = "fsl,imx28-mmc";
pinctrl-names = "default";
pinctrl-0 = <&mmc0_4bit_pins_a>;
bus-width = <4>;
status = "okay";
};
ssp2: ssp@80014000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx28-spi";
pinctrl-names = "default";
pinctrl-0 = <&spi2_pins_a>;
status = "okay";
flash: m25p80@0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "everspin,mr25h256", "mr25h256";
spi-max-frequency = <40000000>;
reg = <0>;
};
};
};
apbx@80040000 {
i2c0: i2c@80058000 {
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins_a>;
status = "okay";
rtc: rtc@51 {
compatible = "nxp,pcf8563";
reg = <0x51>;
};
eeprom: eeprom@52 {
compatible = "atmel,24c64";
reg = <0x52>;
pagesize = <32>;
};
};
duart: serial@80074000 {
pinctrl-names = "default";
pinctrl-0 = <&duart_pins_a>;
status = "okay";
};
usbphy0: usbphy@8007c000 {
status = "okay";
};
auart0: serial@8006a000 {
pinctrl-names = "default";
pinctrl-0 = <&auart0_pins_a>;
status = "okay";
};
};
};
ahb@80080000 {
usb0: usb@80080000 {
vbus-supply = <&reg_usb0_vbus>;
pinctrl-names = "default";
pinctrl-0 = <&usbphy0_pins_b>;
status = "okay";
};
mac0: ethernet@800f0000 {
phy-mode = "rmii";
pinctrl-names = "default";
pinctrl-0 = <&mac0_pins_a>;
status = "okay";
};
mac1: ethernet@800f4000 {
phy-mode = "rmii";
pinctrl-names = "default";
pinctrl-0 = <&mac1_pins_a>;
status = "okay";
};
};
regulators {
compatible = "simple-bus";
reg_usb0_vbus: usb0_vbus {
compatible = "regulator-fixed";
regulator-name = "usb0_vbus";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
gpio = <&gpio3 9 0>;
};
};
leds {
#address-cells = <1>;
#size-cells = <0>;
compatible = "gpio-leds";
status = "okay";
led@1 {
label = "sps1-1:yellow:user";
gpios = <&gpio0 6 0>;
linux,default-trigger = "heartbeat";
reg = <0>;
};
led@2 {
label = "sps1-2:red:user";
gpios = <&gpio0 3 0>;
linux,default-trigger = "heartbeat";
reg = <1>;
};
led@3 {
label = "sps1-3:red:user";
gpios = <&gpio0 0 0>;
default-trigger = "heartbeat";
reg = <2>;
};
};
};