v4.19.13 snapshot.
diff --git a/include/linux/serial_sci.h b/include/linux/serial_sci.h
new file mode 100644
index 0000000..1c89611
--- /dev/null
+++ b/include/linux/serial_sci.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_SERIAL_SCI_H
+#define __LINUX_SERIAL_SCI_H
+
+#include <linux/bitops.h>
+#include <linux/serial_core.h>
+#include <linux/sh_dma.h>
+
+/*
+ * Generic header for SuperH (H)SCI(F) (used by sh/sh64 and related parts)
+ */
+
+/* Serial Control Register (@ = not supported by all parts) */
+#define SCSCR_TIE BIT(7) /* Transmit Interrupt Enable */
+#define SCSCR_RIE BIT(6) /* Receive Interrupt Enable */
+#define SCSCR_TE BIT(5) /* Transmit Enable */
+#define SCSCR_RE BIT(4) /* Receive Enable */
+#define SCSCR_REIE BIT(3) /* Receive Error Interrupt Enable @ */
+#define SCSCR_TOIE BIT(2) /* Timeout Interrupt Enable @ */
+#define SCSCR_CKE1 BIT(1) /* Clock Enable 1 */
+#define SCSCR_CKE0 BIT(0) /* Clock Enable 0 */
+
+
+enum {
+ SCIx_PROBE_REGTYPE,
+
+ SCIx_SCI_REGTYPE,
+ SCIx_IRDA_REGTYPE,
+ SCIx_SCIFA_REGTYPE,
+ SCIx_SCIFB_REGTYPE,
+ SCIx_SH2_SCIF_FIFODATA_REGTYPE,
+ SCIx_SH3_SCIF_REGTYPE,
+ SCIx_SH4_SCIF_REGTYPE,
+ SCIx_SH4_SCIF_BRG_REGTYPE,
+ SCIx_SH4_SCIF_NO_SCSPTR_REGTYPE,
+ SCIx_SH4_SCIF_FIFODATA_REGTYPE,
+ SCIx_SH7705_SCIF_REGTYPE,
+ SCIx_HSCIF_REGTYPE,
+ SCIx_RZ_SCIFA_REGTYPE,
+
+ SCIx_NR_REGTYPES,
+};
+
+struct plat_sci_port_ops {
+ void (*init_pins)(struct uart_port *, unsigned int cflag);
+};
+
+/*
+ * Platform device specific platform_data struct
+ */
+struct plat_sci_port {
+ unsigned int type; /* SCI / SCIF / IRDA / HSCIF */
+ upf_t flags; /* UPF_* flags */
+
+ unsigned int sampling_rate;
+ unsigned int scscr; /* SCSCR initialization */
+
+ /*
+ * Platform overrides if necessary, defaults otherwise.
+ */
+ unsigned char regtype;
+
+ struct plat_sci_port_ops *ops;
+};
+
+#endif /* __LINUX_SERIAL_SCI_H */