AT91: fix EMAC gpio init in at91sam9260_devices.c

The AT91SAM9G20 BOOT ROM apparently initializes PA23 and PA24 to multi drive
(open drain). Revert this, if those pins are going to be used for MII.

Signed-off-by: Reinhard Meyer <[email protected]>

diff --git a/arch/arm/cpu/arm926ejs/at91/at91sam9260_devices.c b/arch/arm/cpu/arm926ejs/at91/at91sam9260_devices.c
index f699f4d4898cd170ea23ec5dbefb00c79e8d30e6..c1822b713d144d878922007f5774ccd277832f1a 100644 (file)
--- a/arch/arm/cpu/arm926ejs/at91/at91sam9260_devices.c
+++ b/arch/arm/cpu/arm926ejs/at91/at91sam9260_devices.c
@@ -204,6 +204,11 @@ void at91_macb_hw_init(void)
 #else
        at91_set_b_periph(AT91_PIO_PORTA, 23, 0);       /* ETX2 */
        at91_set_b_periph(AT91_PIO_PORTA, 24, 0);       /* ETX3 */
+#if defined(CONFIG_AT91SAM9G20)
+       /* 9G20 BOOT ROM initializes those pins to multi-drive, undo that */
+       at91_set_pio_multi_drive(AT91_PIO_PORTA, 23, 0);
+       at91_set_pio_multi_drive(AT91_PIO_PORTA, 24, 0);
+#endif
 #endif
        at91_set_b_periph(AT91_PIO_PORTA, 22, 0);       /* ETXER */
 #endif