colibri_t20: add i2c support

Add I2C support in order to subsequently allow disabling the PMIC sleep
mode on low supply voltage.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>

diff --git a/arch/arm/dts/tegra20-colibri.dts b/arch/arm/dts/tegra20-colibri.dts
index bf14c6b960d37ba7c1d6b84e67925970c999d9a8..8eaac4f5a5fd16744c175b18cb1a0fb48363c444 100644 (file)
--- a/arch/arm/dts/tegra20-colibri.dts
+++ b/arch/arm/dts/tegra20-colibri.dts
@@ -11,6 +11,9 @@
        };
 
        aliases {
+               i2c0 = "/i2c@7000d000";
+               i2c1 = "/i2c@7000c000";
+               i2c2 = "/i2c@7000c400";
                usb0 = "/usb@c5008000";
                usb1 = "/usb@c5000000";
                usb2 = "/usb@c5004000";
@@ -52,6 +55,31 @@
                };
        };
 
+       /*
+        * GEN1_I2C: I2C_SDA/SCL on SODIMM pin 194/196 (e.g. RTC on carrier
+        * board)
+        */
+       i2c@7000c000 {
+               status = "okay";
+               clock-frequency = <100000>;
+       };
+
+       /* GEN2_I2C: unused */
+
+       /* DDC_CLOCK/DATA on X3 pin 15/16 (e.g. display EDID) */
+       i2c@7000c400 {
+               status = "okay";
+               clock-frequency = <100000>;
+       };
+
+       /*
+        * PWR_I2C: power I2C to PMIC and temperature sensor
+        */
+       i2c@7000d000 {
+               status = "okay";
+               clock-frequency = <100000>;
+       };
+
        sdhci@c8000600 {
                status = "okay";
                cd-gpios = <&gpio TEGRA_GPIO(C, 7) GPIO_ACTIVE_LOW>;

diff --git a/include/configs/colibri_t20.h b/include/configs/colibri_t20.h
index 54ca8c992cb725e55025565d8e4d5629a0c75a54..b3479359eddcb430ad92da3eb63766d9931eea47 100644 (file)
--- a/include/configs/colibri_t20.h
+++ b/include/configs/colibri_t20.h
@@ -21,6 +21,10 @@
 
 #define CONFIG_MACH_TYPE               MACH_TYPE_COLIBRI_T20
 
+/* I2C */
+#define CONFIG_SYS_I2C_TEGRA
+#define CONFIG_CMD_I2C
+
 /* SD/MMC support */
 #define CONFIG_MMC
 #define CONFIG_GENERIC_MMC