[PATCH v1] nrf51: Fix last GPIO CNF address

[Cameron Esfahani]

NRF51_GPIO_REG_CNF_END doesn't actually refer to the start of the last
valid CNF register: it's referring to the last byte of the last valid
CNF register.

This hasn't been a problem up to now, as current implementation in
memory.c turns an unaligned 4-byte read from 0x77f to a single byte read
and the qtest only looks at the least-significant byte of the register.

But, when running with Cedric Le Goater's <address@hidden> pending fix for
unaligned accesses in memory.c, the qtest breaks.

Considering NRF51 doesn't support unaligned accesses, the simplest fix
is to actually set NRF51_GPIO_REG_CNF_END to the start of the last valid
CNF register: 0x77c.

Now, qtests work with or without Cedric's patch.

Signed-off-by: Cameron Esfahani <address@hidden>
---
 include/hw/gpio/nrf51_gpio.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/hw/gpio/nrf51_gpio.h b/include/hw/gpio/nrf51_gpio.h
index 337ee534bb..1d62bbc928 100644
--- a/include/hw/gpio/nrf51_gpio.h
+++ b/include/hw/gpio/nrf51_gpio.h
@@ -42,7 +42,7 @@
 #define NRF51_GPIO_REG_DIRSET       0x518
 #define NRF51_GPIO_REG_DIRCLR       0x51C
 #define NRF51_GPIO_REG_CNF_START    0x700
-#define NRF51_GPIO_REG_CNF_END      0x77F
+#define NRF51_GPIO_REG_CNF_END      0x77C
 
 #define NRF51_GPIO_PULLDOWN 1
 #define NRF51_GPIO_PULLUP 3
-- 
2.24.0