ppc4xx: Sequoia has two UARTs in "4-pin" mode. Configure the GPIOs as per schematic.

The Sequoia board has two UARTs in "4-pin" mode. This patch modifies the GPIO
configuration to match the schematic, and also sets the SDR0_PFC1 register to
select the corresponding mode for the UARTs.
Signed-off-by: NSteven A. Falco <sfalco@harris.com>
Signed-off-by: NStefan Roese <sr@denx.de>

board/amcc/sequoia/sequoia.c

@@ -93,6 +93,11 @@ int board_early_init_f(void)
 #ifdef CONFIG_I2C_MULTI_BUS
 	sdr0_pfc1 |= ((sdr0_pfc1 & ~SDR0_PFC1_SIS_MASK) | SDR0_PFC1_SIS_IIC1_SEL);
 #endif
+	/* Two UARTs, so we need 4-pin mode.  Also, we want CTS/RTS mode. */
+	sdr0_pfc1 = (sdr0_pfc1 & ~SDR0_PFC1_U0IM_MASK) | SDR0_PFC1_U0IM_4PINS;
+	sdr0_pfc1 = (sdr0_pfc1 & ~SDR0_PFC1_U0ME_MASK) | SDR0_PFC1_U0ME_CTS_RTS;
+	sdr0_pfc1 = (sdr0_pfc1 & ~SDR0_PFC1_U1ME_MASK) | SDR0_PFC1_U1ME_CTS_RTS;
+
 	mfsdr(SDR0_PFC2, sdr0_pfc2);
 	sdr0_pfc2 = (sdr0_pfc2 & ~SDR0_PFC2_SELECT_MASK) |
 		SDR0_PFC2_SELECT_CONFIG_4;

include/configs/sequoia.h

@@ -422,12 +422,12 @@
 /* GPIO Core 1 */									\
 {GPIO1_BASE, GPIO_OUT, GPIO_ALT1, GPIO_OUT_1}, /* GPIO32 USB2D_OPMODE0	EBC_DATA(2)	*/	\
 {GPIO1_BASE, GPIO_OUT, GPIO_ALT1, GPIO_OUT_1}, /* GPIO33 USB2D_OPMODE1	EBC_DATA(3)	*/	\
-{GPIO1_BASE, GPIO_OUT, GPIO_ALT3, GPIO_OUT_1}, /* GPIO34 UART0_DCD_N	UART1_DSR_CTS_N	UART2_SOUT*/ \
-{GPIO1_BASE, GPIO_IN , GPIO_ALT3, GPIO_OUT_0}, /* GPIO35 UART0_8PIN_DSR_N UART1_RTS_DTR_N UART2_SIN*/ \
-{GPIO1_BASE, GPIO_IN , GPIO_ALT3, GPIO_OUT_0}, /* GPIO36 UART0_8PIN_CTS_N EBC_DATA(0)	UART3_SIN*/ \
-{GPIO1_BASE, GPIO_BI , GPIO_ALT2, GPIO_OUT_0}, /* GPIO37 UART0_RTS_N	EBC_DATA(1)	UART3_SOUT*/ \
-{GPIO1_BASE, GPIO_OUT, GPIO_ALT2, GPIO_OUT_1}, /* GPIO38 UART0_DTR_N	UART1_SOUT	*/	\
-{GPIO1_BASE, GPIO_IN , GPIO_ALT2, GPIO_OUT_0}, /* GPIO39 UART0_RI_N	UART1_SIN	*/	\
+{GPIO1_BASE, GPIO_IN , GPIO_ALT2, GPIO_OUT_0}, /* GPIO34 UART0_8PIN_DCD_N UART1_DSR_CTS_N UART2_SOUT*/ \
+{GPIO1_BASE, GPIO_OUT, GPIO_ALT2, GPIO_OUT_1}, /* GPIO35 UART0_8PIN_DSR_N UART1_RTS_DTR_N UART2_SIN*/ \
+{GPIO1_BASE, GPIO_IN , GPIO_ALT1, GPIO_OUT_0}, /* GPIO36 UART0_CTS_N	EBC_DATA(0)	UART3_SIN*/ \
+{GPIO1_BASE, GPIO_OUT, GPIO_ALT1, GPIO_OUT_1}, /* GPIO37 UART0_RTS_N	EBC_DATA(1)	UART3_SOUT*/ \
+{GPIO1_BASE, GPIO_OUT, GPIO_ALT2, GPIO_OUT_1}, /* GPIO38 UART0_8PIN_DTR_N UART1_SOUT	*/	\
+{GPIO1_BASE, GPIO_IN , GPIO_ALT2, GPIO_OUT_0}, /* GPIO39 UART0_8PIN_RI_N UART1_SIN	*/	\
 {GPIO1_BASE, GPIO_IN , GPIO_ALT1, GPIO_OUT_0}, /* GPIO40 UIC_IRQ(0)			*/	\
 {GPIO1_BASE, GPIO_IN , GPIO_ALT1, GPIO_OUT_0}, /* GPIO41 UIC_IRQ(1)			*/	\
 {GPIO1_BASE, GPIO_IN , GPIO_ALT1, GPIO_OUT_0}, /* GPIO42 UIC_IRQ(2)			*/	\