[U-Boot] [PATCH 1/4] armv8/ls1043aqds: added lpuart support

[Wenbin Song]

From: Shaohui Xie <shaohui.xie at nxp.com>

Signed-off-by: Shaohui Xie <shaohui.xie at nxp.com>
Signed-off-by: Mingkai Hu <mingkai.hu at nxp.com>
---
 board/freescale/ls1043aqds/ls1043aqds.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/board/freescale/ls1043aqds/ls1043aqds.c b/board/freescale/ls1043aqds/ls1043aqds.c
index d6696ca..1da3fe1 100644
--- a/board/freescale/ls1043aqds/ls1043aqds.c
+++ b/board/freescale/ls1043aqds/ls1043aqds.c
@@ -40,6 +40,9 @@ enum {
 #define CFG_SD_MUX3_MUX4	0x1 /* MUX4 */
 #define CFG_SD_MUX4_SLOT3	0x0 /* SLOT3 TX/RX1 */
 #define CFG_SD_MUX4_SLOT1	0x1 /* SLOT1 TX/RX3 */
+#define CFG_UART_MUX_MASK	0x6
+#define CFG_UART_MUX_SHIFT	1
+#define CFG_LPUART_EN		0x1
 
 int checkboard(void)
 {
@@ -218,7 +221,19 @@ void board_retimer_init(void)
 
 int board_early_init_f(void)
 {
+#ifdef CONFIG_LPUART
+	u8 uart;
+#endif
 	fsl_lsch2_early_init_f();
+#ifdef CONFIG_LPUART
+	/*FIXME: need to check which lpuart is enabled in rcw, for now
+	 * we use lpuart1.
+	 */
+	uart = QIXIS_READ(brdcfg[14]);
+	uart &= ~CFG_UART_MUX_MASK;
+	uart |= CFG_LPUART_EN << CFG_UART_MUX_SHIFT;
+	QIXIS_WRITE(brdcfg[14], uart);
+#endif
 
 	return 0;
 }
-- 
2.1.0.27.g96db324