Merge branch 'irqchip/st' into irqchip/core

STMicroelectronics STi System Configuration Controlled IRQs

-----------------------------------------------------------

On STi based systems; External, CTI (Core Sight), PMU (Performance Management),

and PL310 L2 Cache IRQs are controlled using System Configuration registers.

This driver is used to unmask them prior to use.

Required properties:

- compatible	: Should be set to one of:

			"st,stih415-irq-syscfg"

			"st,stih416-irq-syscfg"

			"st,stih407-irq-syscfg"

			"st,stid127-irq-syscfg"

- st,syscfg	: Phandle to Cortex-A9 IRQ system config registers

- st,irq-device	: Array of IRQs to enable - should be 2 in length

- st,fiq-device	: Array of FIQs to enable - should be 2 in length

Optional properties:

- st,invert-ext	: External IRQs can be inverted at will.  This property inverts

		  these IRQs using bitwise logic.  A number of defines have been

		  provided for convenience:

			ST_IRQ_SYSCFG_EXT_1_INV

			ST_IRQ_SYSCFG_EXT_2_INV

			ST_IRQ_SYSCFG_EXT_3_INV

Example:

irq-syscfg {

	compatible    = "st,stih416-irq-syscfg";

	st,syscfg     = <&syscfg_cpu>;

	st,irq-device = <ST_IRQ_SYSCFG_PMU_0>,

			<ST_IRQ_SYSCFG_PMU_1>;

	st,fiq-device = <ST_IRQ_SYSCFG_DISABLED>,

			<ST_IRQ_SYSCFG_DISABLED>;

	st,invert-ext = <(ST_IRQ_SYSCFG_EXT_1_INV | ST_IRQ_SYSCFG_EXT_3_INV)>;

};

	bool

	select IRQ_DOMAIN

config ST_IRQCHIP

	bool

	select REGMAP

	select MFD_SYSCON

	help

	  Enables SysCfg Controlled IRQs on STi based platforms.

config TB10X_IRQC

	bool

	select IRQ_DOMAIN

obj-$(CONFIG_VERSATILE_FPGA_IRQ)	+= irq-versatile-fpga.o

obj-$(CONFIG_ARCH_NSPIRE)		+= irq-zevio.o

obj-$(CONFIG_ARCH_VT8500)		+= irq-vt8500.o

obj-$(CONFIG_ST_IRQCHIP)		+= irq-st.o

obj-$(CONFIG_TB10X_IRQC)		+= irq-tb10x.o

obj-$(CONFIG_XTENSA)			+= irq-xtensa-pic.o

obj-$(CONFIG_XTENSA_MX)			+= irq-xtensa-mx.o

/*

 *  Copyright (C) 2014 STMicroelectronics – All Rights Reserved

 *

 *  Author: Lee Jones <lee.jones@linaro.org>

 *

 *  This is a re-write of Christophe Kerello's PMU driver.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

#include <dt-bindings/interrupt-controller/irq-st.h>

#include <linux/err.h>

#include <linux/mfd/syscon.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/slab.h>

#define STIH415_SYSCFG_642		0x0a8

#define STIH416_SYSCFG_7543		0x87c

#define STIH407_SYSCFG_5102		0x198

#define STID127_SYSCFG_734		0x088

#define ST_A9_IRQ_MASK			0x001FFFFF

#define ST_A9_IRQ_MAX_CHANS		2

#define ST_A9_IRQ_EN_CTI_0		BIT(0)

#define ST_A9_IRQ_EN_CTI_1		BIT(1)

#define ST_A9_IRQ_EN_PMU_0		BIT(2)

#define ST_A9_IRQ_EN_PMU_1		BIT(3)

#define ST_A9_IRQ_EN_PL310_L2		BIT(4)

#define ST_A9_IRQ_EN_EXT_0		BIT(5)

#define ST_A9_IRQ_EN_EXT_1		BIT(6)

#define ST_A9_IRQ_EN_EXT_2		BIT(7)

#define ST_A9_FIQ_N_SEL(dev, chan)	(dev << (8  + (chan * 3)))

#define ST_A9_IRQ_N_SEL(dev, chan)	(dev << (14 + (chan * 3)))

#define ST_A9_EXTIRQ_INV_SEL(dev)	(dev << 20)

struct st_irq_syscfg {

	struct regmap *regmap;

	unsigned int syscfg;

	unsigned int config;

	bool ext_inverted;

};

static const struct of_device_id st_irq_syscfg_match[] = {

	{

		.compatible = "st,stih415-irq-syscfg",

		.data = (void *)STIH415_SYSCFG_642,

	},

	{

		.compatible = "st,stih416-irq-syscfg",

		.data = (void *)STIH416_SYSCFG_7543,

	},

	{

		.compatible = "st,stih407-irq-syscfg",

		.data = (void *)STIH407_SYSCFG_5102,

	},

	{

		.compatible = "st,stid127-irq-syscfg",

		.data = (void *)STID127_SYSCFG_734,

	},

	{}

};

static int st_irq_xlate(struct platform_device *pdev,

			int device, int channel, bool irq)

{

	struct st_irq_syscfg *ddata = dev_get_drvdata(&pdev->dev);

	/* Set the device enable bit. */

	switch (device) {

	case ST_IRQ_SYSCFG_EXT_0:

		ddata->config |= ST_A9_IRQ_EN_EXT_0;

		break;

	case ST_IRQ_SYSCFG_EXT_1:

		ddata->config |= ST_A9_IRQ_EN_EXT_1;

		break;

	case ST_IRQ_SYSCFG_EXT_2:

		ddata->config |= ST_A9_IRQ_EN_EXT_2;

		break;

	case ST_IRQ_SYSCFG_CTI_0:

		ddata->config |= ST_A9_IRQ_EN_CTI_0;

		break;

	case ST_IRQ_SYSCFG_CTI_1:

		ddata->config |= ST_A9_IRQ_EN_CTI_1;

		break;

	case ST_IRQ_SYSCFG_PMU_0:

		ddata->config |= ST_A9_IRQ_EN_PMU_0;

		break;

	case ST_IRQ_SYSCFG_PMU_1:

		ddata->config |= ST_A9_IRQ_EN_PMU_1;

		break;

	case ST_IRQ_SYSCFG_pl310_L2:

		ddata->config |= ST_A9_IRQ_EN_PL310_L2;

		break;

	case ST_IRQ_SYSCFG_DISABLED:

		return 0;

	default:

		dev_err(&pdev->dev, "Unrecognised device %d\n", device);

		return -EINVAL;

	}

	/* Select IRQ/FIQ channel for device. */

	ddata->config |= irq ?

		ST_A9_IRQ_N_SEL(device, channel) :

		ST_A9_FIQ_N_SEL(device, channel);

	return 0;

}

static int st_irq_syscfg_enable(struct platform_device *pdev)

{

	struct device_node *np = pdev->dev.of_node;

	struct st_irq_syscfg *ddata = dev_get_drvdata(&pdev->dev);

	int channels, ret, i;

	u32 device, invert;

	channels = of_property_count_u32_elems(np, "st,irq-device");

	if (channels != ST_A9_IRQ_MAX_CHANS) {

		dev_err(&pdev->dev, "st,enable-irq-device must have 2 elems\n");

		return -EINVAL;

	}

	channels = of_property_count_u32_elems(np, "st,fiq-device");

	if (channels != ST_A9_IRQ_MAX_CHANS) {

		dev_err(&pdev->dev, "st,enable-fiq-device must have 2 elems\n");

		return -EINVAL;

	}

	for (i = 0; i < ST_A9_IRQ_MAX_CHANS; i++) {

		of_property_read_u32_index(np, "st,irq-device", i, &device);

		ret = st_irq_xlate(pdev, device, i, true);

		if (ret)

			return ret;

		of_property_read_u32_index(np, "st,fiq-device", i, &device);

		ret = st_irq_xlate(pdev, device, i, false);

		if (ret)

			return ret;

	}

	/* External IRQs may be inverted. */

	of_property_read_u32(np, "st,invert-ext", &invert);

	ddata->config |= ST_A9_EXTIRQ_INV_SEL(invert);

	return regmap_update_bits(ddata->regmap, ddata->syscfg,

				  ST_A9_IRQ_MASK, ddata->config);

}

static int st_irq_syscfg_probe(struct platform_device *pdev)

{

	struct device_node *np = pdev->dev.of_node;

	const struct of_device_id *match;

	struct st_irq_syscfg *ddata;

	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);

	if (!ddata)

		return -ENOMEM;

	match = of_match_device(st_irq_syscfg_match, &pdev->dev);

	if (!match)

		return -ENODEV;

	ddata->syscfg = (unsigned int)match->data;

	ddata->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");

	if (IS_ERR(ddata->regmap)) {

		dev_err(&pdev->dev, "syscfg phandle missing\n");

		return PTR_ERR(ddata->regmap);

	}

	dev_set_drvdata(&pdev->dev, ddata);

	return st_irq_syscfg_enable(pdev);

}

static int st_irq_syscfg_resume(struct device *dev)

{

	struct st_irq_syscfg *ddata = dev_get_drvdata(dev);

	return regmap_update_bits(ddata->regmap, ddata->syscfg,

				  ST_A9_IRQ_MASK, ddata->config);

}

static SIMPLE_DEV_PM_OPS(st_irq_syscfg_pm_ops, NULL, st_irq_syscfg_resume);

static struct platform_driver st_irq_syscfg_driver = {

	.driver = {

		.name = "st_irq_syscfg",

		.pm = &st_irq_syscfg_pm_ops,

		.of_match_table = st_irq_syscfg_match,

	},

	.probe = st_irq_syscfg_probe,

};

static int __init st_irq_syscfg_init(void)

{

	return platform_driver_register(&st_irq_syscfg_driver);

}

core_initcall(st_irq_syscfg_init);

/*

 *  include/linux/irqchip/irq-st.h

 *

 *  Copyright (C) 2014 STMicroelectronics – All Rights Reserved

 *

 *  Author: Lee Jones <lee.jones@linaro.org>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_ST_H

#define _DT_BINDINGS_INTERRUPT_CONTROLLER_ST_H

#define ST_IRQ_SYSCFG_EXT_0		0

#define ST_IRQ_SYSCFG_EXT_1		1

#define ST_IRQ_SYSCFG_EXT_2		2

#define ST_IRQ_SYSCFG_CTI_0		3

#define ST_IRQ_SYSCFG_CTI_1		4

#define ST_IRQ_SYSCFG_PMU_0		5

#define ST_IRQ_SYSCFG_PMU_1		6

#define ST_IRQ_SYSCFG_pl310_L2		7

#define ST_IRQ_SYSCFG_DISABLED		0xFFFFFFFF

#define ST_IRQ_SYSCFG_EXT_1_INV		0x1

#define ST_IRQ_SYSCFG_EXT_2_INV		0x2

#define ST_IRQ_SYSCFG_EXT_3_INV		0x4

#endif