5 files changed, 46 insertions, 11 deletions
diff --git a/fw/fe310/bsp/include/sifive/devices/aon.h b/fw/fe310/bsp/include/sifive/devices/aon.h
index 63f1db3..4a3332c 100644
--- a/fw/fe310/bsp/include/sifive/devices/aon.h
+++ b/fw/fe310/bsp/include/sifive/devices/aon.h
@@ -57,6 +57,7 @@
 #define AON_PMUKEY      0x14C
 
 #define AON_LFROSC      0x070
+
 /* Constants */
 
 #define AON_WDOGKEY_VALUE  0x51F15E
diff --git a/fw/fe310/bsp/include/sifive/devices/clint.h b/fw/fe310/bsp/include/sifive/devices/clint.h
index cd3e0c7..617b657 100644
--- a/fw/fe310/bsp/include/sifive/devices/clint.h
+++ b/fw/fe310/bsp/include/sifive/devices/clint.h
@@ -4,11 +4,11 @@
 #define _SIFIVE_CLINT_H
 
 
-#define CLINT_MSIP 0x0000
-#define CLINT_MSIP_size   0x4
-#define CLINT_MTIMECMP 0x4000
+#define CLINT_MSIP          0x0000
+#define CLINT_MSIP_size     0x4
+#define CLINT_MTIMECMP      0x4000
 #define CLINT_MTIMECMP_size 0x8
-#define CLINT_MTIME 0xBFF8
-#define CLINT_MTIME_size 0x8
+#define CLINT_MTIME         0xBFF8
+#define CLINT_MTIME_size    0x8
 
-#endif /* _SIFIVE_CLINT_H */ 
+#endif /* _SIFIVE_CLINT_H */
diff --git a/fw/fe310/bsp/include/sifive/devices/gpio.h b/fw/fe310/bsp/include/sifive/devices/gpio.h
index f7f0acb..835ac83 100644
--- a/fw/fe310/bsp/include/sifive/devices/gpio.h
+++ b/fw/fe310/bsp/include/sifive/devices/gpio.h
@@ -19,6 +19,6 @@
 #define GPIO_LOW_IP     (0x34)
 #define GPIO_IOF_EN     (0x38)
 #define GPIO_IOF_SEL    (0x3C)
-#define GPIO_OUTPUT_XOR    (0x40)
+#define GPIO_OUTPUT_XOR (0x40)
 
 #endif /* _SIFIVE_GPIO_H */
diff --git a/fw/fe310/bsp/include/sifive/devices/i2c.h b/fw/fe310/bsp/include/sifive/devices/i2c.h
new file mode 100644
index 0000000..900e238
--- /dev/null
+++ b/fw/fe310/bsp/include/sifive/devices/i2c.h
@@ -0,0 +1,34 @@
+// See LICENSE for license details.
+
+#ifndef _SIFIVE_I2C_H
+#define _SIFIVE_I2C_H
+
+/* Register offsets */
+
+#define I2C_PRESCALE_LOW   0x00
+#define I2C_PRESCALE_HIGH  0x04
+#define I2C_CONTROL        0x08
+#define I2C_TRANSMIT       0x0c
+#define I2C_RECEIVE        0x0c
+#define I2C_COMMAND        0x10
+#define I2C_STATUS         0x10
+
+/* Constants */
+
+#define I2C_CONTROL_EN      (1UL << 7)
+#define I2C_CONTROL_IE      (1UL << 6)
+#define I2C_WRITE           (0UL << 0)
+#define I2C_READ            (1UL << 0)
+#define I2C_CMD_START       (1UL << 7)
+#define I2C_CMD_STOP        (1UL << 6)
+#define I2C_CMD_READ        (1UL << 5)
+#define I2C_CMD_WRITE       (1UL << 4)
+#define I2C_CMD_ACK         (1UL << 3)
+#define I2C_CMD_IACK        (1UL << 0)
+#define I2C_STATUS_RXACK    (1UL << 7)
+#define I2C_STATUS_BUSY     (1UL << 6)
+#define I2C_STATUS_AL       (1UL << 5)
+#define I2C_STATUS_TIP      (1UL << 1)
+#define I2C_STATUS_IP       (1UL << 0)
+
+#endif /* _SIFIVE_I2C_H */
diff --git a/fw/fe310/bsp/include/sifive/devices/prci.h b/fw/fe310/bsp/include/sifive/devices/prci.h
index 1a3de58..d46da08 100644
--- a/fw/fe310/bsp/include/sifive/devices/prci.h
+++ b/fw/fe310/bsp/include/sifive/devices/prci.h
@@ -12,13 +12,13 @@
 #define PRCI_PROCMONCFG  (0x00F0)
 
 /* Fields */
-#define ROSC_DIV(x)    (((x) & 0x2F) << 0 ) 
+#define ROSC_DIV(x)    (((x) & 0x2F) << 0 )
 #define ROSC_TRIM(x)   (((x) & 0x1F) << 16)
-#define ROSC_EN(x)     (((x) & 0x1 ) << 30) 
+#define ROSC_EN(x)     (((x) & 0x1 ) << 30)
 #define ROSC_RDY(x)    (((x) & 0x1 ) << 31)
 
-#define XOSC_EN(x)     (((x) & 0x1) << 30)
-#define XOSC_RDY(x)    (((x) & 0x1) << 31)
+#define XOSC_EN(x)     (((x) & 0x1)  << 30)
+#define XOSC_RDY(x)    (((x) & 0x1)  << 31)
 
 #define PLL_R(x)       (((x) & 0x7)  << 0)
 // single reserved bit for F LSB.