[PATCH v2 3/6] irqchip: Introduce RTD1319 support using the Realtek common interrupt controller driver
From: James Tai
Date: Fri Nov 17 2023 - 11:28:35 EST
Add support for the RTD1319 platform.
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202311061208.hJmxGqym-lkp@xxxxxxxxx/
CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CC: Marc Zyngier <maz@xxxxxxxxxx>
CC: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: James Tai <james.tai@xxxxxxxxxxx>
---
v1 to v2 change:
- Resolved kernel test robot build warnings
- Replaced magic number with macro
- Fixed code style issues
drivers/irqchip/Kconfig | 6 +
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-realtek-rtd1319.c | 218 ++++++++++++++++++++++++++
3 files changed, 225 insertions(+)
create mode 100644 drivers/irqchip/irq-realtek-rtd1319.c
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 267c3429b48d..05856ce885fa 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -222,6 +222,12 @@ config REALTEK_DHC_INTC
tristate
select IRQ_DOMAIN
+config REALTEK_RTD1319_INTC
+ tristate "Realtek RTD1319 interrupt controller"
+ select REALTEK_DHC_INTC
+ help
+ Support for Realtek RTD1319 Interrupt Controller.
+
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 f6774af7fde2..6a2650b0a924 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -48,6 +48,7 @@ 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..23c13c218b04
--- /dev/null
+++ b/drivers/irqchip/irq-realtek-rtd1319.c
@@ -0,0 +1,218 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * Realtek RTD1319 interrupt controller driver
+ *
+ * Copyright (c) 2023 Realtek Semiconductor Corporation
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/irqchip.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.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 ISO_ISR_UMSK_OFFSET 0x4
+#define MISC_ISR_EN_OFFSET 0x80
+#define MISC_ISR_OFFSET 0xc
+#define MISC_ISR_UMSK_OFFSET 0x8
+
+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_ISR_WDOG_NMI_SHIFT = 2,
+ RTD1319_ISR_UR1_SHIFT = 3,
+ RTD1319_ISR_TC5_SHIFT = 4,
+ RTD1319_ISR_UR1_TO_SHIFT = 5,
+ RTD1319_ISR_TC0_SHIFT = 6,
+ RTD1319_ISR_TC1_SHIFT = 7,
+ RTD1319_ISR_UR2_SHIFT = 8,
+ RTD1319_ISR_RTC_HSEC_SHIFT = 9,
+ RTD1319_ISR_RTC_MIN_SHIFT = 10,
+ RTD1319_ISR_RTC_HOUR_SHIFT = 11,
+ RTD1319_ISR_RTC_DATE_SHIFT = 12,
+ RTD1319_ISR_UR2_TO_SHIFT = 13,
+ RTD1319_ISR_I2C5_SHIFT = 14,
+ RTD1319_ISR_I2C3_SHIFT = 23,
+ RTD1319_ISR_SC0_SHIFT = 24,
+ RTD1319_ISR_SC1_SHIFT = 25,
+ RTD1319_ISR_SPI_SHIFT = 27,
+ RTD1319_ISR_FAN_SHIFT = 29,
+};
+
+static const u32 rtd1319_misc_isr_to_scpu_int_en_mask[32] = {
+ [RTD1319_ISR_UR1_SHIFT] = BIT(3),
+ [RTD1319_ISR_UR1_TO_SHIFT] = BIT(5),
+ [RTD1319_ISR_UR2_TO_SHIFT] = BIT(6),
+ [RTD1319_ISR_UR2_SHIFT] = BIT(7),
+ [RTD1319_ISR_RTC_MIN_SHIFT] = BIT(10),
+ [RTD1319_ISR_RTC_HOUR_SHIFT] = BIT(11),
+ [RTD1319_ISR_RTC_DATE_SHIFT] = BIT(12),
+ [RTD1319_ISR_I2C5_SHIFT] = BIT(14),
+ [RTD1319_ISR_SC0_SHIFT] = BIT(24),
+ [RTD1319_ISR_SC1_SHIFT] = BIT(25),
+ [RTD1319_ISR_SPI_SHIFT] = BIT(27),
+ [RTD1319_ISR_I2C3_SHIFT] = BIT(28),
+ [RTD1319_ISR_FAN_SHIFT] = BIT(29),
+ [RTD1319_ISR_WDOG_NMI_SHIFT] = IRQ_ALWAYS_ENABLED,
+};
+
+static struct realtek_intc_subset_cfg 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,
+ .umsk_isr_offset = ISO_ISR_UMSK_OFFSET,
+ .scpu_int_en_offset = ISO_ISR_EN_OFFSET,
+ .isr_to_scpu_int_en_mask = rtd1319_iso_isr_to_scpu_int_en_mask,
+ .cfg = rtd1319_intc_iso_cfgs,
+ .cfg_num = ARRAY_SIZE(rtd1319_intc_iso_cfgs),
+};
+
+static struct realtek_intc_subset_cfg 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,
+ .umsk_isr_offset = MISC_ISR_UMSK_OFFSET,
+ .scpu_int_en_offset = MISC_ISR_EN_OFFSET,
+ .isr_to_scpu_int_en_mask = rtd1319_misc_isr_to_scpu_int_en_mask,
+ .cfg = rtd1319_intc_misc_cfgs,
+ .cfg_num = ARRAY_SIZE(rtd1319_intc_misc_cfgs),
+};
+
+static const struct of_device_id realtek_intc_rtd1319_dt_matches[] = {
+ {
+ .compatible = "realtek,rtd1319-intc-iso",
+ .data = &rtd1319_intc_iso_info,
+ }, {
+ .compatible = "realtek,rtd1319-intc-misc",
+ .data = &rtd1319_intc_misc_info,
+ },
+ { /* sentinel */ }
+};
+
+static int realtek_intc_rtd1319_suspend(struct device *dev)
+{
+ struct realtek_intc_data *data = dev_get_drvdata(dev);
+ const struct realtek_intc_info *info = data->info;
+
+ data->saved_en = readl(data->base + info->scpu_int_en_offset);
+
+ writel(DISABLE_INTC, data->base + info->scpu_int_en_offset);
+ writel(CLEAN_INTC_STATUS, data->base + info->umsk_isr_offset);
+ writel(CLEAN_INTC_STATUS, data->base + info->isr_offset);
+
+ return 0;
+}
+
+static int realtek_intc_rtd1319_resume(struct device *dev)
+{
+ struct realtek_intc_data *data = dev_get_drvdata(dev);
+ const struct realtek_intc_info *info = data->info;
+
+ writel(CLEAN_INTC_STATUS, data->base + info->umsk_isr_offset);
+ writel(CLEAN_INTC_STATUS, data->base + info->isr_offset);
+ writel(data->saved_en, data->base + info->scpu_int_en_offset);
+
+ return 0;
+}
+
+static const struct dev_pm_ops realtek_intc_rtd1319_pm_ops = {
+ .suspend_noirq = realtek_intc_rtd1319_suspend,
+ .resume_noirq = realtek_intc_rtd1319_resume,
+};
+
+static int rtd1319_intc_probe(struct platform_device *pdev)
+{
+ const struct realtek_intc_info *info;
+
+ info = of_device_get_match_data(&pdev->dev);
+ if (!info)
+ return -EINVAL;
+
+ return realtek_intc_probe(pdev, info);
+}
+
+static struct platform_driver realtek_intc_rtd1319_driver = {
+ .probe = rtd1319_intc_probe,
+ .driver = {
+ .name = "realtek_intc_rtd1319",
+ .of_match_table = realtek_intc_rtd1319_dt_matches,
+ .suppress_bind_attrs = true,
+ .pm = &realtek_intc_rtd1319_pm_ops,
+ },
+};
+
+static int __init realtek_intc_rtd1319_init(void)
+{
+ return platform_driver_register(&realtek_intc_rtd1319_driver);
+}
+core_initcall(realtek_intc_rtd1319_init);
+
+static void __exit realtek_intc_rtd1319_exit(void)
+{
+ platform_driver_unregister(&realtek_intc_rtd1319_driver);
+}
+module_exit(realtek_intc_rtd1319_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Realtek RTD1319 Interrupt Controller Driver");
--
2.25.1