From 2cd918a07a11f6b20ebde845bf3d57aa0e483d16 Mon Sep 17 00:00:00 2001
From: Laurent Navet <laurent.navet@gmail.com>
Date: Thu, 30 Jun 2016 22:35:58 +0200
Subject: [PATCH] atmega_common: abstract Power Reduction Register

PR Register is PRR0 on atmega2560 and atmega1281
but PRR on atmega328p.
this abstracts as atmega Power Reduction Register as MEGA_PRR.
---
 boards/arduino-mega2560/include/periph_conf.h | 1 +
 boards/waspmote-pro/include/periph_conf.h     | 1 +
 cpu/atmega_common/periph/gpio.c               | 2 ++
 cpu/atmega_common/periph/spi.c                | 2 +-
 4 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/boards/arduino-mega2560/include/periph_conf.h b/boards/arduino-mega2560/include/periph_conf.h
index a1c93857c6..a835e09c38 100644
--- a/boards/arduino-mega2560/include/periph_conf.h
+++ b/boards/arduino-mega2560/include/periph_conf.h
@@ -97,6 +97,7 @@ extern "C" {
  */
 #define SPI_NUMOF           1           /* set to 0 to disable SPI */
 #define SPI_0_EN            1           /* remove once SPI rework is done */
+#define MEGA_PRR            PRR0        /* Power Reduction Register is PRR0 */
 /** @} */
 
 #ifdef __cplusplus
diff --git a/boards/waspmote-pro/include/periph_conf.h b/boards/waspmote-pro/include/periph_conf.h
index 6f9ca6d74f..22f7231fca 100644
--- a/boards/waspmote-pro/include/periph_conf.h
+++ b/boards/waspmote-pro/include/periph_conf.h
@@ -104,6 +104,7 @@ extern "C" {
  */
 #define SPI_NUMOF           1           /* set to 0 to disable SPI */
 #define SPI_0_EN            1           /* remove once SPI rework is done */
+#define MEGA_PRR            PRR0        /* Power Reduction Resgister */
 /** @} */
 
 #ifdef __cplusplus
diff --git a/cpu/atmega_common/periph/gpio.c b/cpu/atmega_common/periph/gpio.c
index 36bf5b1fbf..cf76b88102 100644
--- a/cpu/atmega_common/periph/gpio.c
+++ b/cpu/atmega_common/periph/gpio.c
@@ -133,7 +133,9 @@ int gpio_init_int(gpio_t pin, gpio_mode_t mode, gpio_flank_t flank,
     uint8_t pin_num = _pin_num(pin);
 
     if ((_port_num(pin) == PORT_D && pin_num > 3)
+#if defined (PORTE)
          || (_port_num(pin) == PORT_E && pin_num < 4)
+#endif
          || ((mode != GPIO_IN) && (mode != GPIO_IN_PU))) {
         return -1;
     }
diff --git a/cpu/atmega_common/periph/spi.c b/cpu/atmega_common/periph/spi.c
index 5de8de222a..7d1338ae6e 100644
--- a/cpu/atmega_common/periph/spi.c
+++ b/cpu/atmega_common/periph/spi.c
@@ -61,7 +61,7 @@ int spi_init_master(spi_t dev, spi_conf_t conf, spi_speed_t speed)
     DDRB |= ((1 << DDB2) | (1 << DDB1) | (1 << DDB0));
 
     /* make sure the SPI is not powered off */
-    PRR0 &= ~(1 << PRSPI);
+    MEGA_PRR &= ~(1 << PRSPI);
 
     /* configure as master, with given mode and clock */
     SPSR = (speed >> S2X_SHIFT);