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lib: utils: serial: Add FDT driver for Renesas SCIF

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Add FDT driver for Renesas SCIF.

    dts example:

    soc: soc {
          ....
            scif0: serial@1004b800 {
                    compatible = "renesas,scif-r9a07g043",
                                 "renesas,scif-r9a07g044";
                    reg = <0 0x1004b800 0 0x400>;
                    interrupts = <412 IRQ_TYPE_LEVEL_HIGH>,
                                 <414 IRQ_TYPE_LEVEL_HIGH>,
                                 <415 IRQ_TYPE_LEVEL_HIGH>,
                                 <413 IRQ_TYPE_LEVEL_HIGH>,
                                 <416 IRQ_TYPE_LEVEL_HIGH>,
                                 <416 IRQ_TYPE_LEVEL_HIGH>;
                    interrupt-names = "eri", "rxi", "txi",
                                      "bri", "dri", "tei";
                    clocks = <&cpg CPG_MOD R9A07G043_SCIF0_CLK_PCK>;
                    clock-names = "fck";
                    power-domains = <&cpg>;
                    resets = <&cpg R9A07G043_SCIF0_RST_SYSTEM_N>;
                    status = "disabled";
            };
          ....
    };

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Lad Prabhakar
2022-12-10 10:30:08 +00:00
committed by Anup Patel
parent 64e8b9f72e
commit 0021b43737
5 changed files with 53 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
lib/utils/fdt/fdt_helper.c
View File

@@ -23,6 +23,9 @@
#define DEFAULT_UART_REG_IO_WIDTH 1
#define DEFAULT_UART_REG_OFFSET 0
#define DEFAULT_RENESAS_SCIF_FREQ 100000000
#define DEFAULT_RENESAS_SCIF_BAUD 115200
#define DEFAULT_SIFIVE_UART_FREQ 0
#define DEFAULT_SIFIVE_UART_BAUD 115200
@@ -355,6 +358,14 @@ int fdt_parse_gaisler_uart_node(void *fdt, int nodeoffset,
DEFAULT_UART_BAUD);
}
int fdt_parse_renesas_scif_node(void *fdt, int nodeoffset,
struct platform_uart_data *uart)
{
return fdt_parse_uart_node_common(fdt, nodeoffset, uart,
DEFAULT_RENESAS_SCIF_FREQ,
DEFAULT_RENESAS_SCIF_BAUD);
}
int fdt_parse_shakti_uart_node(void *fdt, int nodeoffset,
struct platform_uart_data *uart)
{

5
lib/utils/serial/Kconfig
View File

@@ -24,6 +24,11 @@ config FDT_SERIAL_HTIF
select SYS_HTIF
default n
config FDT_SERIAL_RENESAS_SCIF
bool "Renesas SCIF FDT driver"
select SERIAL_RENESAS_SCIF
default n
config FDT_SERIAL_SHAKTI
bool "Shakti UART FDT driver"
select SERIAL_SHAKTI

31
lib/utils/serial/fdt_serial_renesas_scif.c Normal file
View File

@@ -0,0 +1,31 @@
// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (C) 2022 Renesas Electronics Corporation
*/
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/serial/fdt_serial.h>
#include <sbi_utils/serial/renesas-scif.h>
static int serial_renesas_scif_init(void *fdt, int nodeoff,
const struct fdt_match *match)
{
struct platform_uart_data uart = { 0 };
int ret;
ret = fdt_parse_renesas_scif_node(fdt, nodeoff, &uart);
if (ret)
return ret;
return renesas_scif_init(uart.addr, uart.freq, uart.baud);
}
static const struct fdt_match serial_renesas_scif_match[] = {
{ .compatible = "renesas,scif-r9a07g043" },
{ /* sentinel */ }
};
struct fdt_serial fdt_serial_renesas_scif = {
.match_table = serial_renesas_scif_match,
.init = serial_renesas_scif_init
};

3
lib/utils/serial/objects.mk
View File

@@ -19,6 +19,9 @@ libsbiutils-objs-$(CONFIG_FDT_SERIAL_GAISLER) += serial/fdt_serial_gaisler.o
carray-fdt_serial_drivers-$(CONFIG_FDT_SERIAL_HTIF) += fdt_serial_htif
libsbiutils-objs-$(CONFIG_FDT_SERIAL_HTIF) += serial/fdt_serial_htif.o
carray-fdt_serial_drivers-$(CONFIG_FDT_SERIAL_RENESAS_SCIF) += fdt_serial_renesas_scif
libsbiutils-objs-$(CONFIG_FDT_SERIAL_RENESAS_SCIF) += serial/fdt_serial_renesas_scif.o
carray-fdt_serial_drivers-$(CONFIG_FDT_SERIAL_SHAKTI) += fdt_serial_shakti
libsbiutils-objs-$(CONFIG_FDT_SERIAL_SHAKTI) += serial/fdt_serial_shakti.o