[PATCH 1/4] board: freescale: ls1028a: mux changes for lpuart

[andy.tang at nxp.com]

From: Yuantian Tang <andy.tang at nxp.com>

mux changes in board file to enable lpuart1 and macro
define for lpuart1 used for mux changes in board configuation
register 13

Signed-off-by: Vabhav Sharma <vabhav.sharma at nxp.com>
Signed-off-by: Yuantian Tang <andy.tang at nxp.com>
---
 board/freescale/ls1028a/ls1028a.c | 32 +++++++++++++++++++++++++++++++
 include/configs/ls1028aqds.h      |  7 +++++++
 2 files changed, 39 insertions(+)

diff --git a/board/freescale/ls1028a/ls1028a.c b/board/freescale/ls1028a/ls1028a.c
index aa93534ac6..3659e7daf3 100644
--- a/board/freescale/ls1028a/ls1028a.c
+++ b/board/freescale/ls1028a/ls1028a.c
@@ -31,6 +31,7 @@ DECLARE_GLOBAL_DATA_PTR;
 
 int config_board_mux(void)
 {
+#ifndef CONFIG_LPUART
 #if defined(CONFIG_TARGET_LS1028AQDS) && defined(CONFIG_FSL_QIXIS)
 	u8 reg;
 
@@ -55,9 +56,18 @@ int config_board_mux(void)
 	reg &= ~(0xc0);
 	QIXIS_WRITE(brdcfg[15], reg);
 #endif
+#endif
+
 	return 0;
 }
 
+#ifdef CONFIG_LPUART
+u32 get_lpuart_clk(void)
+{
+	return gd->bus_clk / CONFIG_SYS_FSL_LPUART_CLK_DIV;
+}
+#endif
+
 int board_init(void)
 {
 #ifdef CONFIG_ENV_IS_NOWHERE
@@ -120,11 +130,33 @@ int misc_init_r(void)
 
 int board_early_init_f(void)
 {
+#ifdef CONFIG_LPUART
+	u8 uart;
+#endif
+
 #ifdef CONFIG_SYS_I2C_EARLY_INIT
 	i2c_early_init_f();
 #endif
 
 	fsl_lsch3_early_init_f();
+
+#ifdef CONFIG_LPUART
+	/*
+	 * Field| Function
+	 * --------------------------------------------------------------
+	 * 7-6  | Controls I2C3 routing (net CFG_MUX_I2C3):
+	 * I2C3 | 11= Routes {SCL, SDA} to LPUART1 header as {SOUT, SIN}.
+	 * --------------------------------------------------------------
+	 * 5-4  | Controls I2C4 routing (net CFG_MUX_I2C4):
+	 * I2C4 |11= Routes {SCL, SDA} to LPUART1 header as {CTS_B, RTS_B}.
+	 */
+	/* use lpuart0 as system console */
+	uart = QIXIS_READ(brdcfg[13]);
+	uart &= ~CFG_LPUART_MUX_MASK;
+	uart |= CFG_LPUART_EN;
+	QIXIS_WRITE(brdcfg[13], uart);
+#endif
+
 	return 0;
 }
 
diff --git a/include/configs/ls1028aqds.h b/include/configs/ls1028aqds.h
index 982df07bb0..b3c12420eb 100644
--- a/include/configs/ls1028aqds.h
+++ b/include/configs/ls1028aqds.h
@@ -66,6 +66,13 @@
 #define CONFIG_SYS_MONITOR_BASE CONFIG_SYS_TEXT_BASE
 #endif
 
+/* LPUART */
+#ifdef CONFIG_LPUART
+#define CONFIG_LPUART_32B_REG
+#define CFG_LPUART_MUX_MASK	0xf0
+#define CFG_LPUART_EN		0xf0
+#endif
+
 /* SATA */
 #define CONFIG_SCSI_AHCI_PLAT
 
-- 
2.17.1