diff options
author | Michael Walle <michael@walle.cc> | 2020-09-14 23:43:32 +0200 |
---|---|---|
committer | Lee Jones <lee.jones@linaro.org> | 2020-09-17 15:58:37 +0100 |
commit | 03ac990e0ac0c2823282d5b8dd2d536d88bbe6c2 (patch) | |
tree | 7ec442eb8daeeb44fe0f46b03732b309d59b168c /drivers | |
parent | a538ad229bbee4f8c68204c75b2e1ae43db875d6 (diff) | |
download | linux-stable-03ac990e0ac0c2823282d5b8dd2d536d88bbe6c2.tar.gz linux-stable-03ac990e0ac0c2823282d5b8dd2d536d88bbe6c2.tar.bz2 linux-stable-03ac990e0ac0c2823282d5b8dd2d536d88bbe6c2.zip |
irqchip: Add sl28cpld interrupt controller support
Add support for the interrupt controller inside the sl28 CPLD management
controller.
The interrupt controller can handle at most 8 interrupts and is really
simplistic and consists only of an interrupt mask and an interrupt
pending register.
Signed-off-by: Michael Walle <michael@walle.cc>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/irqchip/Kconfig | 8 | ||||
-rw-r--r-- | drivers/irqchip/Makefile | 1 | ||||
-rw-r--r-- | drivers/irqchip/irq-sl28cpld.c | 96 |
3 files changed, 105 insertions, 0 deletions
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index bb70b7177f94..19cd32ba2155 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -246,6 +246,14 @@ config RENESAS_RZA1_IRQC Enable support for the Renesas RZ/A1 Interrupt Controller, to use up to 8 external interrupts with configurable sense select. +config SL28CPLD_INTC + bool "Kontron sl28cpld IRQ controller" + depends on MFD_SL28CPLD=y || COMPILE_TEST + select REGMAP_IRQ + help + Interrupt controller driver for the board management controller + found on the Kontron sl28 CPLD. + config ST_IRQCHIP bool select REGMAP diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 133f9c45744a..39af7d89204d 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -111,3 +111,4 @@ obj-$(CONFIG_LOONGSON_HTPIC) += irq-loongson-htpic.o obj-$(CONFIG_LOONGSON_HTVEC) += irq-loongson-htvec.o obj-$(CONFIG_LOONGSON_PCH_PIC) += irq-loongson-pch-pic.o obj-$(CONFIG_LOONGSON_PCH_MSI) += irq-loongson-pch-msi.o +obj-$(CONFIG_SL28CPLD_INTC) += irq-sl28cpld.o diff --git a/drivers/irqchip/irq-sl28cpld.c b/drivers/irqchip/irq-sl28cpld.c new file mode 100644 index 000000000000..0aa50d025ef6 --- /dev/null +++ b/drivers/irqchip/irq-sl28cpld.c @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * sl28cpld interrupt controller driver + * + * Copyright 2020 Kontron Europe GmbH + */ + +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/property.h> +#include <linux/regmap.h> + +#define INTC_IE 0x00 +#define INTC_IP 0x01 + +static const struct regmap_irq sl28cpld_irqs[] = { + REGMAP_IRQ_REG_LINE(0, 8), + REGMAP_IRQ_REG_LINE(1, 8), + REGMAP_IRQ_REG_LINE(2, 8), + REGMAP_IRQ_REG_LINE(3, 8), + REGMAP_IRQ_REG_LINE(4, 8), + REGMAP_IRQ_REG_LINE(5, 8), + REGMAP_IRQ_REG_LINE(6, 8), + REGMAP_IRQ_REG_LINE(7, 8), +}; + +struct sl28cpld_intc { + struct regmap *regmap; + struct regmap_irq_chip chip; + struct regmap_irq_chip_data *irq_data; +}; + +static int sl28cpld_intc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct sl28cpld_intc *irqchip; + int irq; + u32 base; + int ret; + + if (!dev->parent) + return -ENODEV; + + irqchip = devm_kzalloc(dev, sizeof(*irqchip), GFP_KERNEL); + if (!irqchip) + return -ENOMEM; + + irqchip->regmap = dev_get_regmap(dev->parent, NULL); + if (!irqchip->regmap) + return -ENODEV; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = device_property_read_u32(&pdev->dev, "reg", &base); + if (ret) + return -EINVAL; + + irqchip->chip.name = "sl28cpld-intc"; + irqchip->chip.irqs = sl28cpld_irqs; + irqchip->chip.num_irqs = ARRAY_SIZE(sl28cpld_irqs); + irqchip->chip.num_regs = 1; + irqchip->chip.status_base = base + INTC_IP; + irqchip->chip.mask_base = base + INTC_IE; + irqchip->chip.mask_invert = true, + irqchip->chip.ack_base = base + INTC_IP; + + return devm_regmap_add_irq_chip_fwnode(dev, dev_fwnode(dev), + irqchip->regmap, irq, + IRQF_SHARED | IRQF_ONESHOT, 0, + &irqchip->chip, + &irqchip->irq_data); +} + +static const struct of_device_id sl28cpld_intc_of_match[] = { + { .compatible = "kontron,sl28cpld-intc" }, + {} +}; +MODULE_DEVICE_TABLE(of, sl28cpld_intc_of_match); + +static struct platform_driver sl28cpld_intc_driver = { + .probe = sl28cpld_intc_probe, + .driver = { + .name = "sl28cpld-intc", + .of_match_table = sl28cpld_intc_of_match, + } +}; +module_platform_driver(sl28cpld_intc_driver); + +MODULE_DESCRIPTION("sl28cpld Interrupt Controller Driver"); +MODULE_AUTHOR("Michael Walle <michael@walle.cc>"); +MODULE_LICENSE("GPL"); |