[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/powerpc/boot/mpc52xx-psc.c b/src/kernel/linux/v4.14/arch/powerpc/boot/mpc52xx-psc.c
new file mode 100644
index 0000000..c2c0863
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/powerpc/boot/mpc52xx-psc.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MPC5200 PSC serial console support.
+ *
+ * Author: Grant Likely <grant.likely@secretlab.ca>
+ *
+ * Copyright (c) 2007 Secret Lab Technologies Ltd.
+ * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ *
+ * It is assumed that the firmware (or the platform file) has already set
+ * up the port.
+ */
+
+#include "types.h"
+#include "io.h"
+#include "ops.h"
+
+/* Programmable Serial Controller (PSC) status register bits */
+#define MPC52xx_PSC_SR 0x04
+#define MPC52xx_PSC_SR_RXRDY 0x0100
+#define MPC52xx_PSC_SR_RXFULL 0x0200
+#define MPC52xx_PSC_SR_TXRDY 0x0400
+#define MPC52xx_PSC_SR_TXEMP 0x0800
+
+#define MPC52xx_PSC_BUFFER 0x0C
+
+static void *psc;
+
+static int psc_open(void)
+{
+ /* Assume the firmware has already configured the PSC into
+ * uart mode */
+ return 0;
+}
+
+static void psc_putc(unsigned char c)
+{
+ while (!(in_be16(psc + MPC52xx_PSC_SR) & MPC52xx_PSC_SR_TXRDY)) ;
+ out_8(psc + MPC52xx_PSC_BUFFER, c);
+}
+
+static unsigned char psc_tstc(void)
+{
+ return (in_be16(psc + MPC52xx_PSC_SR) & MPC52xx_PSC_SR_RXRDY) != 0;
+}
+
+static unsigned char psc_getc(void)
+{
+ while (!(in_be16(psc + MPC52xx_PSC_SR) & MPC52xx_PSC_SR_RXRDY)) ;
+ return in_8(psc + MPC52xx_PSC_BUFFER);
+}
+
+int mpc5200_psc_console_init(void *devp, struct serial_console_data *scdp)
+{
+ /* Get the base address of the psc registers */
+ if (dt_get_virtual_reg(devp, &psc, 1) < 1)
+ return -1;
+
+ scdp->open = psc_open;
+ scdp->putc = psc_putc;
+ scdp->getc = psc_getc;
+ scdp->tstc = psc_tstc;
+
+ return 0;
+}