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Subject[PATCH v5 19/22] sh: IO-DATA HDL-U (a.k.a landisk) IRQCHIP driver
Date
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
.../interrupt-controller/iodata-landisk.txt | 31 ++++++++++
drivers/irqchip/Makefile | 2 +-
drivers/irqchip/irq-io-landisk.c | 72 ++++++++++++++++++++++
3 files changed, 104 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt
create mode 100644 drivers/irqchip/irq-io-landisk.c

diff --git a/Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt b/Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt
new file mode 100644
index 0000000..cf461dc
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt
@@ -0,0 +1,31 @@
+DT bindings for the I/O DATA HDL-U interrupt controller
+
+Required properties:
+
+ - compatible: has to be "iodata,landisk-intc".
+
+ - reg: Base address and length of interrupt controller register.
+
+ - #interrupt-cells: has to be <1>: an interrupt index.
+
+ - #address-cells: has to be <0>
+
+ - interrupt-map: Interrupt mapping on parent controller.
+
+Example
+-------
+
+ cpldintc: cpld@b0000000 {
+ compatible = "iodata,landisk-intc";
+ #interrupt-cells = <1>;
+ #address-cells = <0>;
+ reg = <0xb0000000 8>;
+ interrupt-map=<0 &shintc evt2irq(0x2a0)>,
+ <1 &shintc evt2irq(0x2c0)>,
+ <2 &shintc evt2irq(0x2e0)>,
+ <3 &shintc evt2irq(0x300)>,
+ <4 &shintc evt2irq(0x320)>,
+ <5 &shintc evt2irq(0x340)>,
+ <6 &shintc evt2irq(0x360)>,
+ <7 &shintc evt2irq(0x380)>;
+ };
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 2ab5735..5e225cf 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -69,4 +69,4 @@ obj-$(CONFIG_PIC32_EVIC) += irq-pic32-evic.o
obj-$(CONFIG_MVEBU_ODMI) += irq-mvebu-odmi.o
obj-$(CONFIG_LS_SCFG_MSI) += irq-ls-scfg-msi.o
obj-$(CONFIG_EZNPS_GIC) += irq-eznps.o
-obj-$(CONFIG_RENESAS_SH_INTC) += irq-renesas-sh7751.o
+obj-$(CONFIG_RENESAS_SH_INTC) += irq-renesas-sh7751.o irq-io-landisk.o
diff --git a/drivers/irqchip/irq-io-landisk.c b/drivers/irqchip/irq-io-landisk.c
new file mode 100644
index 0000000..b7f3b41
--- /dev/null
+++ b/drivers/irqchip/irq-io-landisk.c
@@ -0,0 +1,72 @@
+/*
+ * IO-DATA LANDISK CPLD IRQ driver
+ *
+ * Copyright 2016 Yoshinori Sato <ysato@users.sourceforge.jp>
+ */
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqdomain.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/io.h>
+
+static void landisk_mask_irq(struct irq_data *data)
+{
+ u8 mask = __raw_readb(data->chip_data + 5);
+
+ mask &= ~(1 << (data->irq - 5));
+ __raw_writeb(mask, data->chip_data + 5);
+}
+
+static void landisk_unmask_irq(struct irq_data *data)
+{
+ u8 mask = __raw_readb(data->chip_data + 5);
+
+ mask |= (1 << (data->irq - 5));
+ __raw_writeb(mask, data->chip_data + 5);
+}
+
+static struct irq_chip cpld_irq_chip = {
+ .name = "LANDISK-CPLD",
+ .irq_unmask = landisk_unmask_irq,
+ .irq_mask = landisk_mask_irq,
+};
+
+static int cpld_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw_irq_num)
+{
+ irq_set_chip_and_handler(virq, &cpld_irq_chip,
+ handle_simple_irq);
+ irq_set_chip_data(virq, d->host_data);
+
+ return 0;
+}
+
+static struct irq_domain_ops irq_ops = {
+ .xlate = irq_domain_xlate_onecell,
+ .map = cpld_map,
+};
+
+static int __init landisk_intc_of_init(struct device_node *intc,
+ struct device_node *parent)
+{
+ struct irq_domain *domain, *pdomain;
+ int num_irqpin;
+ void *baseaddr;
+
+ baseaddr = of_iomap(intc, 0);
+ pdomain = irq_find_host(parent);
+ of_get_property(intc, "interrupt-map", &num_irqpin);
+ num_irqpin /= sizeof(u32) * 3;
+ domain = irq_domain_create_hierarchy(pdomain, 0, num_irqpin,
+ of_node_to_fwnode(intc),
+ &irq_ops, baseaddr);
+ if (!domain)
+ panic("%s: unable to create IRQ domain\n", intc->full_name);
+ irq_domain_associate_many(domain, 5, 0, 8);
+ return 0;
+}
+
+IRQCHIP_DECLARE(cpld_intc, "iodata,landisk-intc", landisk_intc_of_init);
--
2.7.0
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