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drivers: Add Atmel SAM family I2C (TWI) driver

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Added I2C bus (TWI) driver for Atmel SAM MCU family. Only
I2C Master Mode with 7 bit addressing is currently supported.

Tested on Arduino Due board.

Origin: Original

Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
This commit is contained in:
Piotr Mienkowski 2017-05-21 02:47:32 +02:00 • committed by Kumar Gala
commit 26ba99e972
14 changed files with 557 additions and 8 deletions
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21
dts/arm/atmel/sam3x.dtsi
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@ -5,6 +5,7 @@
*/
#include <arm/armv7-m.dtsi>
#include <dt-bindings/i2c/i2c.h>
/ {
cpus {
@ -29,6 +30,26 @@
};
soc {
i2c0: i2c@4008C000 {
compatible = "atmel,sam-i2c-twi";
clock-frequency = <I2C_BITRATE_STANDARD>;
reg = <0x4008C000 0x128>;
interrupts = <22 0>;
peripheral-id = <22>;
label = "I2C_0";
status = "disabled";
};
i2c1: i2c@40090000 {
compatible = "atmel,sam-i2c-twi";
clock-frequency = <I2C_BITRATE_STANDARD>;
reg = <0x40090000 0x128>;
interrupts = <23 0>;
peripheral-id = <23>;
label = "I2C_1";
status = "disabled";
};
uart0: uart@400E0800 {
compatible = "atmel,sam-uart";
reg = <0x400E0800 0x124>;