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driver: serial: Add UART driver initial version of RTS5912.

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Add UART driver for Realtek RTS5912.

Signed-off-by: Lin Yu-Cheng <lin_yu_cheng@realtek.com>
This commit is contained in:
Lin Yu-Cheng 2024-11-23 08:20:58 +08:00 • committed by Benjamin Cabé
commit a3c0b03915
6 changed files with 139 additions and 0 deletions
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1
drivers/serial/CMakeLists.txt
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@ -61,6 +61,7 @@ zephyr_library_sources_ifdef(CONFIG_UART_RCAR uart_rcar.c)
zephyr_library_sources_ifdef(CONFIG_UART_RENESAS_RA uart_renesas_ra.c)
zephyr_library_sources_ifdef(CONFIG_UART_RENESAS_RZ_SCIF uart_renesas_rz_scif.c)
zephyr_library_sources_ifdef(CONFIG_UART_RPI_PICO_PIO uart_rpi_pico_pio.c)
zephyr_library_sources_ifdef(CONFIG_UART_RTS5912 uart_realtek_rts5912.c)
zephyr_library_sources_ifdef(CONFIG_UART_RTT_DRIVER uart_rtt.c)
zephyr_library_sources_ifdef(CONFIG_UART_RV32M1_LPUART uart_rv32m1_lpuart.c)
zephyr_library_sources_ifdef(CONFIG_UART_RZT2M uart_rzt2m.c)

2
drivers/serial/Kconfig
View file

@ -230,4 +230,6 @@ source "drivers/serial/Kconfig.si32"
source "drivers/serial/Kconfig.wch_usart"
source "drivers/serial/Kconfig.realtek_rts5912"
endif # SERIAL

19
drivers/serial/Kconfig.realtek_rts5912 Normal file
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@ -0,0 +1,19 @@
# SPDX-License-Identifier: Apache-2.0
#
# Copyright (c) 2024 Realtek Semiconductor Corporation, SIBG-SD7
#
config UART_RTS5912
bool "UART driver for Realtek RTS5912 EC"
default y if DT_HAS_REALTEK_RTS5912_UART_ENABLED
select PINCTRL
select CLOCK_CONTROL
help
This option enables the RTS5912 UART wrapper driver.
config UART_RTS5912_INIT_PRIORITY
int "RTS5912 UART wrapper init priority"
default 49
depends on UART_RTS5912
help
Initialization priority for Realtek RTS5912 UART wrapper driver.

75
drivers/serial/uart_realtek_rts5912.c Normal file
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@ -0,0 +1,75 @@
/*
* SPDX-License-Identifier: Apache-2.0
*
* Copyright (c) 2024 Realtek Semiconductor Corporation, SIBG-SD7
* Author: Lin Yu-Cheng <lin_yu_cheng@realtek.com>
*/
#define DT_DRV_COMPAT realtek_rts5912_uart
#include <zephyr/kernel.h>
#include <zephyr/drivers/pinctrl.h>
#include <zephyr/drivers/uart.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/clock_control.h>
#include <zephyr/drivers/clock_control/clock_control_rts5912.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(uart_rts5912, CONFIG_UART_LOG_LEVEL);
BUILD_ASSERT(CONFIG_UART_RTS5912_INIT_PRIORITY < CONFIG_SERIAL_INIT_PRIORITY,
"The uart_realtek_rts5912 driver must be initialized before the uart_ns16550 driver");
/* device config */
struct uart_rts5912_device_config {
const struct pinctrl_dev_config *pcfg;
const struct device *clk_dev;
struct rts5912_sccon_subsys sccon_cfg;
};
/** Device data structure */
struct uart_rts5912_dev_data {
};
static int rts5912_uart_init(const struct device *dev)
{
const struct uart_rts5912_device_config *const dev_cfg = dev->config;
int rc;
if (!device_is_ready(dev_cfg->clk_dev)) {
return -ENODEV;
}
rc = clock_control_on(dev_cfg->clk_dev, (clock_control_subsys_t)&dev_cfg->sccon_cfg);
if (rc != 0) {
return rc;
}
rc = pinctrl_apply_state(dev_cfg->pcfg, PINCTRL_STATE_DEFAULT);
if (rc != 0) {
return rc;
}
return 0;
}
#define UART_RTS5912_DEVICE_INIT(n) \
PINCTRL_DT_INST_DEFINE(n); \
\
static const struct uart_rts5912_device_config uart_rts5912_dev_cfg_##n = { \
.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n), \
.clk_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(n)), \
.sccon_cfg = \
{ \
.clk_grp = DT_INST_CLOCKS_CELL_BY_NAME(n, uart##n, clk_grp), \
.clk_idx = DT_INST_CLOCKS_CELL_BY_NAME(n, uart##n, clk_idx), \
}, \
}; \
\
static struct uart_rts5912_dev_data uart_rts5912_dev_data_##n; \
\
DEVICE_DT_INST_DEFINE(n, &rts5912_uart_init, NULL, &uart_rts5912_dev_data_##n, \
&uart_rts5912_dev_cfg_##n, PRE_KERNEL_1, \
CONFIG_UART_RTS5912_INIT_PRIORITY, NULL);
DT_INST_FOREACH_STATUS_OKAY(UART_RTS5912_DEVICE_INIT)

18
dts/arm/realtek/ec/rts5912.dtsi
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@ -92,6 +92,24 @@
status = "okay";
};
uart0: uart@40010100 {
compatible = "ns16550";
reg = <0x40010100 0x100>;
reg-shift = <2>;
clock-frequency = <25000000>;
interrupts = <191 0>;
status = "disabled";
};
uart0_wrapper: uart_wrapper@40010200 {
compatible = "realtek,rts5912-uart";
reg = <0x40010200 0x0020>;
port = <0>;
clocks = <&sccon RTS5912_SCCON_UART UART0_CLKPWR>;
clock-names = "uart0";
status = "disabled";
};
pinctrl: pin-controller@40090000 {
compatible = "realtek,rts5912-pinctrl";
#address-cells = <1>;

24
dts/bindings/serial/realtek,rts5912-uart.yaml Normal file
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@ -0,0 +1,24 @@
# SPDX-License-Identifier: Apache-2.0
#
# Copyright (c) 2024 Realtek Semiconductor Corporation, SIBG-SD7
#
description: Realtek RTS5912 UART
compatible: "realtek,rts5912-uart"
include: [uart-controller.yaml, pinctrl-device.yaml]
properties:
reg:
required: true
port:
type: int
required: true
pinctrl-0:
required: true
pinctrl-names:
required: true