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From: Michael Walle <michael@walle.cc>
To: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org,
	linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Cc: "Linus Walleij" <linus.walleij@linaro.org>,
	"Bartosz Golaszewski" <bgolaszewski@baylibre.com>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Jean Delvare" <jdelvare@suse.com>,
	"Guenter Roeck" <linux@roeck-us.net>,
	"Lee Jones" <lee.jones@linaro.org>,
	"Thierry Reding" <thierry.reding@gmail.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Wim Van Sebroeck" <wim@linux-watchdog.org>,
	"Shawn Guo" <shawnguo@kernel.org>, "Li Yang" <leoyang.li@nxp.com>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Jason Cooper" <jason@lakedaemon.net>,
	"Marc Zyngier" <maz@kernel.org>,
	"Mark Brown" <broonie@kernel.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
	"Michael Walle" <michael@walle.cc>
Subject: [PATCH v4 03/11] irqchip: add sl28cpld interrupt controller support
Date: Thu,  4 Jun 2020 23:10:31 +0200
Message-ID: <20200604211039.12689-4-michael@walle.cc> (raw)
In-Reply-To: <20200604211039.12689-1-michael@walle.cc>

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>
---
 drivers/irqchip/Kconfig        |   3 +
 drivers/irqchip/Makefile       |   1 +
 drivers/irqchip/irq-sl28cpld.c | 102 +++++++++++++++++++++++++++++++++
 drivers/mfd/Kconfig            |   2 +
 4 files changed, 108 insertions(+)
 create mode 100644 drivers/irqchip/irq-sl28cpld.c

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 3e473f4eb175..c4b840bc982e 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -246,6 +246,9 @@ 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
+
 config ST_IRQCHIP
 	bool
 	select REGMAP
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 3a4ce283189a..bcd9797a5aed 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -110,3 +110,4 @@ 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..2151f1b390d7
--- /dev/null
+++ b/drivers/irqchip/irq-sl28cpld.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * sl28cpld interrupt controller driver.
+ *
+ * Copyright 2019 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;
+	unsigned 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_np(&pdev->dev, dev->of_node,
+					   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 const struct platform_device_id sl28cpld_intc_id_table[] = {
+	{ "sl28cpld-intc" },
+	{}
+};
+MODULE_DEVICE_TABLE(platform, sl28cpld_intc_id_table);
+
+static struct platform_driver sl28cpld_intc_driver = {
+	.probe	= sl28cpld_intc_probe,
+	.id_table = sl28cpld_intc_id_table,
+	.driver = {
+		.name = KBUILD_MODNAME,
+		.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");
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 5c0cd514d197..9c84c5746698 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -2114,6 +2114,8 @@ config MFD_SL28CPLD
 	depends on I2C=y
 	depends on OF
 	select REGMAP_I2C
+	select REGMAP_IRQ
+	select SL28CPLD_INTC
 	select MFD_CORE
 	help
 	  This option enables support for the board management controller
-- 
2.20.1


  parent reply index

Thread overview: 74+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-04 21:10 [PATCH v4 00/11] Add support for Kontron sl28cpld Michael Walle
2020-06-04 21:10 ` [PATCH v4 01/11] dt-bindings: mfd: Add bindings for sl28cpld Michael Walle
2020-06-09 16:28   ` Rob Herring
2020-06-04 21:10 ` [PATCH v4 02/11] mfd: Add support for Kontron sl28cpld management controller Michael Walle
2020-06-05  6:57   ` Lee Jones
2020-06-05  9:51     ` Michael Walle
2020-06-05 10:50     ` Mark Brown
2020-06-05 20:07       ` Michael Walle
2020-06-06 11:46         ` Mark Brown
2020-06-06 12:45           ` Michael Walle
2020-06-08  8:28             ` Lee Jones
2020-06-08 10:02               ` Andy Shevchenko
2020-06-08 15:41                 ` Michael Walle
2020-06-08 18:56                   ` Lee Jones
2020-06-08 21:09                     ` Michael Walle
2020-06-09  6:47                       ` Lee Jones
2020-06-09 14:38                         ` Michael Walle
2020-06-09 14:42                           ` Mark Brown
2020-06-09 15:01                             ` Michael Walle
2020-06-09 17:15                               ` Rob Herring
2020-06-09 17:29                                 ` Mark Brown
2020-06-09 18:41                                 ` Lee Jones
2020-06-09 15:19                           ` Lee Jones
2020-06-09 15:30                             ` Michael Walle
2020-06-09 19:45                               ` Lee Jones
2020-06-10  7:10                                 ` Michael Walle
2020-06-10  7:19                                   ` Lee Jones
2020-06-10  7:49                                     ` Michael Walle
2020-06-10  7:56                                       ` Lee Jones
2020-06-10  9:27                                         ` Michael Walle
2020-06-10 18:30                                           ` Lee Jones
2020-06-10 17:16                                     ` Rob Herring
2020-06-10 18:02                                       ` Lee Jones
2020-06-08 18:20                 ` Lee Jones
2020-06-09 16:54               ` Rob Herring
2020-06-09 18:52                 ` Lee Jones
2020-06-05  8:01   ` Andy Shevchenko
2020-06-05  8:02     ` Andy Shevchenko
2020-06-05 10:09     ` Michael Walle
2020-06-05 10:48       ` Andy Shevchenko
2020-06-05 11:51         ` Michael Walle
2020-06-04 21:10 ` Michael Walle [this message]
2020-06-05  1:26   ` [PATCH v4 03/11] irqchip: add sl28cpld interrupt controller support kernel test robot
2020-06-05  8:07   ` Andy Shevchenko
2020-06-08 15:12   ` kernel test robot
2020-06-04 21:10 ` [PATCH v4 04/11] watchdog: add support for sl28cpld watchdog Michael Walle
2020-06-05  8:14   ` Andy Shevchenko
2020-06-05 10:24     ` Michael Walle
2020-06-05 10:50       ` Andy Shevchenko
2020-06-05 13:52         ` Guenter Roeck
2020-06-05 14:09           ` Andy Shevchenko
2020-06-05 15:05             ` Guenter Roeck
2020-06-05 16:04               ` Andy Shevchenko
2020-06-05 16:34                 ` Guenter Roeck
2020-06-04 21:10 ` [PATCH v4 05/11] pwm: add support for sl28cpld PWM controller Michael Walle
2020-06-05  8:15   ` Andy Shevchenko
2020-06-05  8:49   ` Lee Jones
2020-06-05  9:33     ` Andy Shevchenko
2020-06-05 11:39     ` Michael Walle
2020-06-05 18:17     ` Michael Walle
2020-06-08  7:46       ` Lee Jones
2020-06-04 21:10 ` [PATCH v4 06/11] gpio: add support for the sl28cpld GPIO controller Michael Walle
2020-06-05 12:00   ` Andy Shevchenko
2020-06-05 12:42     ` Michael Walle
2020-06-05 13:15       ` Andy Shevchenko
2020-06-05 18:44         ` Michael Walle
2020-06-05 21:19           ` Andy Shevchenko
2020-06-04 21:10 ` [PATCH v4 07/11] hwmon: add support for the sl28cpld hardware monitoring controller Michael Walle
2020-06-05 12:06   ` Andy Shevchenko
2020-06-04 21:10 ` [PATCH v4 08/11] arm64: dts: freescale: sl28: enable sl28cpld Michael Walle
2020-06-04 21:10 ` [PATCH v4 09/11] arm64: dts: freescale: sl28: map GPIOs to input events Michael Walle
2020-06-04 21:10 ` [PATCH v4 10/11] arm64: dts: freescale: sl28: enable LED support Michael Walle
2020-06-04 21:10 ` [PATCH v4 11/11] arm64: dts: freescale: sl28: enable fan support Michael Walle
2020-06-05  6:13 ` [PATCH v4 00/11] Add support for Kontron sl28cpld Lee Jones

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