[PATCH v5 5/8] irqchip/realtek-rtd1319: Add driver for Realtek DHC RTD1319 SoC
From: Yu-Chun Lin
Date: Sun Oct 18 2026 - 12:09:55 EST
From: James Tai <james.tai@xxxxxxxxxxx>
Add support for interrupt controller driver found on Realtek DHC RTD1319
SoCs.
Signed-off-by: James Tai <james.tai@xxxxxxxxxxx>
Signed-off-by: Yu-Chun Lin <eleanor.lin@xxxxxxxxxxx>
---
MAINTAINERS | 1 +
drivers/irqchip/Kconfig | 11 ++
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-realtek-rtd1319.c | 188 ++++++++++++++++++++++++++
4 files changed, 201 insertions(+)
create mode 100644 drivers/irqchip/irq-realtek-rtd1319.c
diff --git a/MAINTAINERS b/MAINTAINERS
index aae6d91fe39e..1ff7cd959ea3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3486,6 +3486,7 @@ F: arch/arm/boot/dts/realtek/
F: arch/arm/mach-realtek/
F: arch/arm64/boot/dts/realtek/
F: drivers/irqchip/irq-realtek-intc-common.*
+F: drivers/irqchip/irq-realtek-rtd*
F: drivers/pinctrl/realtek/
ARM/RISC-V/RENESAS ARCHITECTURE
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index cddbf9915510..3c0c04330640 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -287,6 +287,17 @@ config REALTEK_DHC_INTC
select IRQ_DOMAIN
select MFD_SYSCON
+config REALTEK_RTD1319_INTC
+ tristate "Realtek RTD1319 interrupt controller"
+ depends on ARCH_REALTEK || COMPILE_TEST
+ select REALTEK_DHC_INTC
+ help
+ Enable support for the Realtek RTD1319 SoC Interrupt Controller.
+ Each Realtek DHC SoC has two sets of interrupt controllers, each
+ capable of handling up to 32 interrupts.
+
+ If unsure, say N.
+
config RENESAS_INTC_IRQPIN
bool "Renesas INTC External IRQ Pin Support" if COMPILE_TEST
select IRQ_DOMAIN
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index bc8f5c534a4a..ba3e6b68c085 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -49,6 +49,7 @@ obj-$(CONFIG_IXP4XX_IRQ) += irq-ixp4xx.o
obj-$(CONFIG_JCORE_AIC) += irq-jcore-aic.o
obj-$(CONFIG_RDA_INTC) += irq-rda-intc.o
obj-$(CONFIG_REALTEK_DHC_INTC) += irq-realtek-intc-common.o
+obj-$(CONFIG_REALTEK_RTD1319_INTC) += irq-realtek-rtd1319.o
obj-$(CONFIG_RENESAS_INTC_IRQPIN) += irq-renesas-intc-irqpin.o
obj-$(CONFIG_RENESAS_IRQC) += irq-renesas-irqc.o
obj-$(CONFIG_RENESAS_RZA1_IRQC) += irq-renesas-rza1.o
diff --git a/drivers/irqchip/irq-realtek-rtd1319.c b/drivers/irqchip/irq-realtek-rtd1319.c
new file mode 100644
index 000000000000..b5f32f3b5912
--- /dev/null
+++ b/drivers/irqchip/irq-realtek-rtd1319.c
@@ -0,0 +1,188 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Realtek RTD1319 interrupt controller driver
+ *
+ * Copyright (c) 2023-2026 Realtek Semiconductor Corporation
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include "irq-realtek-intc-common.h"
+
+#define ISO_NORMAL_MASK 0xffffcffe
+#define ISO_RTC_MASK 0x00003001
+#define MISC_NMI_WDT_MASK 0x00000004
+#define MISC_NORMAL_MASK 0xffffc0d2
+#define MISC_UART1_MASK 0x00000028
+#define MISC_UART2_MASK 0x00002100
+
+#define ISO_ISR_EN_OFFSET 0x40
+#define ISO_ISR_OFFSET 0
+#define MISC_ISR_EN_OFFSET 0x80
+#define MISC_ISR_OFFSET 0xc
+
+enum rtd1319_iso_isr_bits {
+ RTD1319_ISO_ISR_TC3_SHIFT = 1,
+ RTD1319_ISO_ISR_UR0_SHIFT = 2,
+ RTD1319_ISO_ISR_LSADC0_SHIFT = 3,
+ RTD1319_ISO_ISR_IRDA_SHIFT = 5,
+ RTD1319_ISO_ISR_SPI1_SHIFT = 6,
+ RTD1319_ISO_ISR_WDOG_NMI_SHIFT = 7,
+ RTD1319_ISO_ISR_I2C0_SHIFT = 8,
+ RTD1319_ISO_ISR_TC4_SHIFT = 9,
+ RTD1319_ISO_ISR_TC7_SHIFT = 10,
+ RTD1319_ISO_ISR_I2C1_SHIFT = 11,
+ RTD1319_ISO_ISR_RTC_HSEC_SHIFT = 12,
+ RTD1319_ISO_ISR_RTC_ALARM_SHIFT = 13,
+ RTD1319_ISO_ISR_GPIOA_SHIFT = 19,
+ RTD1319_ISO_ISR_GPIODA_SHIFT = 20,
+ RTD1319_ISO_ISR_ISO_MISC_SHIFT = 21,
+ RTD1319_ISO_ISR_CBUS_SHIFT = 22,
+ RTD1319_ISO_ISR_ETN_SHIFT = 23,
+ RTD1319_ISO_ISR_USB_HOST_SHIFT = 24,
+ RTD1319_ISO_ISR_USB_U3_DRD_SHIFT = 25,
+ RTD1319_ISO_ISR_USB_U2_DRD_SHIFT = 26,
+ RTD1319_ISO_ISR_PORB_HV_SHIFT = 28,
+ RTD1319_ISO_ISR_PORB_DV_SHIFT = 29,
+ RTD1319_ISO_ISR_PORB_AV_SHIFT = 30,
+ RTD1319_ISO_ISR_I2C1_REQ_SHIFT = 31,
+};
+
+static const u32 rtd1319_iso_isr_to_scpu_int_en_mask[32] = {
+ [RTD1319_ISO_ISR_SPI1_SHIFT] = BIT(1),
+ [RTD1319_ISO_ISR_UR0_SHIFT] = BIT(2),
+ [RTD1319_ISO_ISR_LSADC0_SHIFT] = BIT(3),
+ [RTD1319_ISO_ISR_IRDA_SHIFT] = BIT(5),
+ [RTD1319_ISO_ISR_I2C0_SHIFT] = BIT(8),
+ [RTD1319_ISO_ISR_I2C1_SHIFT] = BIT(11),
+ [RTD1319_ISO_ISR_RTC_HSEC_SHIFT] = BIT(12),
+ [RTD1319_ISO_ISR_RTC_ALARM_SHIFT] = BIT(13),
+ [RTD1319_ISO_ISR_GPIOA_SHIFT] = BIT(19),
+ [RTD1319_ISO_ISR_GPIODA_SHIFT] = BIT(20),
+ [RTD1319_ISO_ISR_PORB_HV_SHIFT] = BIT(28),
+ [RTD1319_ISO_ISR_PORB_DV_SHIFT] = BIT(29),
+ [RTD1319_ISO_ISR_PORB_AV_SHIFT] = BIT(30),
+ [RTD1319_ISO_ISR_I2C1_REQ_SHIFT] = BIT(31),
+};
+
+enum rtd1319_misc_isr_bits {
+ RTD1319_MISC_ISR_WDOG_NMI_SHIFT = 2,
+ RTD1319_MISC_ISR_UR1_SHIFT = 3,
+ RTD1319_MISC_ISR_TC5_SHIFT = 4,
+ RTD1319_MISC_ISR_UR1_TO_SHIFT = 5,
+ RTD1319_MISC_ISR_TC0_SHIFT = 6,
+ RTD1319_MISC_ISR_TC1_SHIFT = 7,
+ RTD1319_MISC_ISR_UR2_SHIFT = 8,
+ RTD1319_MISC_ISR_RTC_HSEC_SHIFT = 9,
+ RTD1319_MISC_ISR_RTC_MIN_SHIFT = 10,
+ RTD1319_MISC_ISR_RTC_HOUR_SHIFT = 11,
+ RTD1319_MISC_ISR_RTC_DATE_SHIFT = 12,
+ RTD1319_MISC_ISR_UR2_TO_SHIFT = 13,
+ RTD1319_MISC_ISR_I2C5_SHIFT = 14,
+ RTD1319_MISC_ISR_I2C3_SHIFT = 23,
+ RTD1319_MISC_ISR_SC0_SHIFT = 24,
+ RTD1319_MISC_ISR_SC1_SHIFT = 25,
+ RTD1319_MISC_ISR_SPI_SHIFT = 27,
+ RTD1319_MISC_ISR_FAN_SHIFT = 29,
+};
+
+static const u32 rtd1319_misc_isr_to_scpu_int_en_mask[32] = {
+ [RTD1319_MISC_ISR_UR1_SHIFT] = BIT(3),
+ [RTD1319_MISC_ISR_UR1_TO_SHIFT] = BIT(5),
+ [RTD1319_MISC_ISR_UR2_TO_SHIFT] = BIT(6),
+ [RTD1319_MISC_ISR_UR2_SHIFT] = BIT(7),
+ [RTD1319_MISC_ISR_RTC_MIN_SHIFT] = BIT(10),
+ [RTD1319_MISC_ISR_RTC_HOUR_SHIFT] = BIT(11),
+ [RTD1319_MISC_ISR_RTC_DATE_SHIFT] = BIT(12),
+ [RTD1319_MISC_ISR_I2C5_SHIFT] = BIT(14),
+ [RTD1319_MISC_ISR_SC0_SHIFT] = BIT(24),
+ [RTD1319_MISC_ISR_SC1_SHIFT] = BIT(25),
+ [RTD1319_MISC_ISR_SPI_SHIFT] = BIT(27),
+ [RTD1319_MISC_ISR_I2C3_SHIFT] = BIT(28),
+ [RTD1319_MISC_ISR_FAN_SHIFT] = BIT(29),
+ [RTD1319_MISC_ISR_WDOG_NMI_SHIFT] = IRQ_ALWAYS_ENABLED,
+};
+
+static const struct realtek_intc_mask rtd1319_intc_iso_cfgs[] = {
+ { ISO_NORMAL_MASK, },
+ { ISO_RTC_MASK, },
+};
+
+static const struct realtek_intc_info rtd1319_intc_iso_info[] = {
+ {
+ .isr_offset = ISO_ISR_OFFSET,
+ .scpu_int_en_offset = ISO_ISR_EN_OFFSET,
+ .isr_to_scpu_int_en_mask = rtd1319_iso_isr_to_scpu_int_en_mask,
+ .subset_mask = rtd1319_intc_iso_cfgs,
+ .subset_num = ARRAY_SIZE(rtd1319_intc_iso_cfgs),
+ }
+};
+
+static const struct realtek_intc_desc rtd1319_intc_iso_desc = {
+ .banks = rtd1319_intc_iso_info,
+ .bank_num = ARRAY_SIZE(rtd1319_intc_iso_info),
+};
+
+static const struct realtek_intc_mask rtd1319_intc_misc_cfgs[] = {
+ { MISC_NORMAL_MASK, },
+ { MISC_NMI_WDT_MASK, },
+ { MISC_UART1_MASK, },
+ { MISC_UART2_MASK, },
+};
+
+static const struct realtek_intc_info rtd1319_intc_misc_info[] = {
+ {
+ .isr_offset = MISC_ISR_OFFSET,
+ .scpu_int_en_offset = MISC_ISR_EN_OFFSET,
+ .isr_to_scpu_int_en_mask = rtd1319_misc_isr_to_scpu_int_en_mask,
+ .subset_mask = rtd1319_intc_misc_cfgs,
+ .subset_num = ARRAY_SIZE(rtd1319_intc_misc_cfgs),
+ }
+};
+
+static const struct realtek_intc_desc rtd1319_intc_misc_desc = {
+ .banks = rtd1319_intc_misc_info,
+ .bank_num = ARRAY_SIZE(rtd1319_intc_misc_info),
+};
+
+static const struct of_device_id realtek_intc_rtd1319_dt_matches[] = {
+ {
+ .compatible = "realtek,rtd1319-intc-iso",
+ .data = &rtd1319_intc_iso_desc,
+ }, {
+ .compatible = "realtek,rtd1319-intc-misc",
+ .data = &rtd1319_intc_misc_desc,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, realtek_intc_rtd1319_dt_matches);
+
+static int rtd1319_intc_probe(struct platform_device *pdev)
+{
+ const struct realtek_intc_desc *desc;
+
+ desc = of_device_get_match_data(&pdev->dev);
+ if (!desc)
+ return -EINVAL;
+
+ return realtek_intc_probe(pdev, desc);
+}
+
+static DEFINE_NOIRQ_DEV_PM_OPS(realtek_intc_rtd1319_pm_ops, realtek_intc_suspend,
+ realtek_intc_resume);
+
+static struct platform_driver realtek_intc_rtd1319_driver = {
+ .probe = rtd1319_intc_probe,
+ .remove = realtek_intc_remove,
+ .driver = {
+ .name = "realtek_intc_rtd1319",
+ .of_match_table = realtek_intc_rtd1319_dt_matches,
+ .pm = pm_sleep_ptr(&realtek_intc_rtd1319_pm_ops),
+ },
+};
+module_platform_driver(realtek_intc_rtd1319_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Realtek RTD1319 Interrupt Controller Driver");
--
2.43.0