From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: olof@lixom.net, arnd@arndb.de, robh+dt@kernel.org,
tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com,
daniel.lezcano@linaro.org, gregkh@linuxfoundation.org,
jslaby@suse.com
Cc: linux-unisoc@lists.infradead.org, afaerber@suse.de,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-serial@vger.kernel.org, amit.kucheria@linaro.org,
linus.walleij@linaro.org, zhao_steven@263.net,
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Subject: [PATCH v4 08/15] irqchip: Add RDA8810PL interrupt driver
Date: Mon, 10 Dec 2018 23:05:43 +0530 [thread overview]
Message-ID: <20181210173550.29643-9-manivannan.sadhasivam@linaro.org> (raw)
In-Reply-To: <20181210173550.29643-1-manivannan.sadhasivam@linaro.org>
Add interrupt driver for RDA Micro RDA8810PL SoC.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/irqchip/Kconfig | 4 ++
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-rda-intc.c | 107 +++++++++++++++++++++++++++++++++
3 files changed, 112 insertions(+)
create mode 100644 drivers/irqchip/irq-rda-intc.c
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 51a5ef0e96ed..9d54645870ad 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -195,6 +195,10 @@ config JCORE_AIC
help
Support for the J-Core integrated AIC.
+config RDA_INTC
+ bool
+ select IRQ_DOMAIN
+
config RENESAS_INTC_IRQPIN
bool
select IRQ_DOMAIN
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 794c13d3ac3d..417108027e40 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_IMGPDC_IRQ) += irq-imgpdc.o
obj-$(CONFIG_IRQ_MIPS_CPU) += irq-mips-cpu.o
obj-$(CONFIG_SIRF_IRQ) += irq-sirfsoc.o
obj-$(CONFIG_JCORE_AIC) += irq-jcore-aic.o
+obj-$(CONFIG_RDA_INTC) += irq-rda-intc.o
obj-$(CONFIG_RENESAS_INTC_IRQPIN) += irq-renesas-intc-irqpin.o
obj-$(CONFIG_RENESAS_IRQC) += irq-renesas-irqc.o
obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o
diff --git a/drivers/irqchip/irq-rda-intc.c b/drivers/irqchip/irq-rda-intc.c
new file mode 100644
index 000000000000..1176291fdef8
--- /dev/null
+++ b/drivers/irqchip/irq-rda-intc.c
@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * RDA8810PL SoC irqchip driver
+ *
+ * Copyright RDA Microelectronics Company Limited
+ * Copyright (c) 2017 Andreas Färber
+ * Copyright (c) 2018 Manivannan Sadhasivam
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqdomain.h>
+#include <linux/of_address.h>
+
+#include <asm/exception.h>
+
+#define RDA_INTC_FINALSTATUS 0x00
+#define RDA_INTC_MASK_SET 0x08
+#define RDA_INTC_MASK_CLR 0x0c
+
+#define RDA_IRQ_MASK_ALL 0xFFFFFFFF
+
+#define RDA_NR_IRQS 32
+
+static void __iomem *rda_intc_base;
+static struct irq_domain *rda_irq_domain;
+
+static void rda_intc_mask_irq(struct irq_data *d)
+{
+ writel_relaxed(BIT(d->hwirq), rda_intc_base + RDA_INTC_MASK_CLR);
+}
+
+static void rda_intc_unmask_irq(struct irq_data *d)
+{
+ writel_relaxed(BIT(d->hwirq), rda_intc_base + RDA_INTC_MASK_SET);
+}
+
+static int rda_intc_set_type(struct irq_data *data, unsigned int flow_type)
+{
+ /* Hardware supports only level triggered interrupts */
+ if ((flow_type & (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW)) == flow_type)
+ return 0;
+
+ return -EINVAL;
+}
+
+static void __exception_irq_entry rda_handle_irq(struct pt_regs *regs)
+{
+ u32 stat = readl_relaxed(rda_intc_base + RDA_INTC_FINALSTATUS);
+ u32 hwirq;
+
+ while (stat) {
+ hwirq = __fls(stat);
+ handle_domain_irq(rda_irq_domain, hwirq, regs);
+ stat &= ~BIT(hwirq);
+ }
+}
+
+static struct irq_chip rda_irq_chip = {
+ .name = "rda-intc",
+ .irq_mask = rda_intc_mask_irq,
+ .irq_unmask = rda_intc_unmask_irq,
+ .irq_set_type = rda_intc_set_type,
+};
+
+static int rda_irq_map(struct irq_domain *d,
+ unsigned int virq, irq_hw_number_t hw)
+{
+ irq_set_status_flags(virq, IRQ_LEVEL);
+ irq_set_chip_and_handler(virq, &rda_irq_chip, handle_level_irq);
+ irq_set_chip_data(virq, d->host_data);
+ irq_set_probe(virq);
+
+ return 0;
+}
+
+static const struct irq_domain_ops rda_irq_domain_ops = {
+ .map = rda_irq_map,
+ .xlate = irq_domain_xlate_onecell,
+};
+
+static int __init rda8810_intc_init(struct device_node *node,
+ struct device_node *parent)
+{
+ rda_intc_base = of_io_request_and_map(node, 0, "rda-intc");
+ if (!rda_intc_base)
+ return -ENXIO;
+
+ /* Mask all interrupt sources */
+ writel_relaxed(RDA_IRQ_MASK_ALL, rda_intc_base + RDA_INTC_MASK_CLR);
+
+ rda_irq_domain = irq_domain_create_linear(&node->fwnode, RDA_NR_IRQS,
+ &rda_irq_domain_ops,
+ rda_intc_base);
+ if (!rda_irq_domain) {
+ iounmap(rda_intc_base);
+ return -ENOMEM;
+ }
+
+ set_handle_irq(rda_handle_irq);
+
+ return 0;
+}
+
+IRQCHIP_DECLARE(rda_intc, "rda,8810pl-intc", rda8810_intc_init);
--
2.17.1
next prev parent reply other threads:[~2018-12-10 17:37 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-10 17:35 [PATCH v4 00/15] Add initial RDA8810PL SoC and Orange Pi boards support Manivannan Sadhasivam
2018-12-10 17:35 ` [PATCH v4 01/15] dt-bindings: Add RDA Micro vendor prefix Manivannan Sadhasivam
2018-12-10 17:35 ` [PATCH v4 02/15] dt-bindings: arm: Document RDA8810PL and reference boards Manivannan Sadhasivam
2018-12-10 17:35 ` [PATCH v4 03/15] ARM: Prepare RDA8810PL SoC Manivannan Sadhasivam
2018-12-10 17:35 ` [PATCH v4 04/15] dt-bindings: interrupt-controller: Document RDA8810PL intc Manivannan Sadhasivam
2018-12-10 17:35 ` [PATCH v4 05/15] ARM: dts: Add devicetree for RDA8810PL SoC Manivannan Sadhasivam
2018-12-10 17:35 ` [PATCH v4 06/15] ARM: dts: Add devicetree for OrangePi 2G IoT board Manivannan Sadhasivam
2018-12-10 17:35 ` [PATCH v4 07/15] ARM: dts: Add devicetree for OrangePi i96 board Manivannan Sadhasivam
2018-12-10 17:35 ` Manivannan Sadhasivam [this message]
2018-12-10 17:35 ` [PATCH v4 09/15] dt-bindings: timer: Document RDA8810PL SoC timer Manivannan Sadhasivam
2018-12-10 22:25 ` Rob Herring
2018-12-10 17:35 ` [PATCH v4 10/15] ARM: dts: rda8810pl: Add timer support Manivannan Sadhasivam
2018-12-10 17:35 ` [PATCH v4 11/15] clocksource: Add clock driver for RDA8810PL SoC Manivannan Sadhasivam
2018-12-12 15:07 ` Daniel Lezcano
2018-12-12 15:47 ` Manivannan Sadhasivam
2018-12-12 15:52 ` Daniel Lezcano
2018-12-15 5:58 ` Manivannan Sadhasivam
2018-12-10 17:35 ` [PATCH v4 12/15] dt-bindings: serial: Document RDA Micro UART Manivannan Sadhasivam
2018-12-10 22:25 ` Rob Herring
2018-12-10 17:35 ` [PATCH v4 13/15] ARM: dts: rda8810pl: Add interrupt support for UART Manivannan Sadhasivam
2018-12-10 17:35 ` [PATCH v4 14/15] tty: serial: Add RDA8810PL UART driver Manivannan Sadhasivam
2018-12-10 17:35 ` [PATCH v4 15/15] MAINTAINERS: Add entry for RDA Micro SoC architecture Manivannan Sadhasivam
2018-12-12 13:53 ` Andreas Färber
2018-12-12 14:46 ` Manivannan Sadhasivam
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