irqchip: st: Supply new driver for STi based devices (07088484) · Commits · e / devices / android_kernel_teracube_mt6765

drivers/irqchip/Kconfig

+7 −0

Original line number	Original line	Diff line number	Diff line
	@@ -110,6 +110,13 @@ config RENESAS_IRQC
	bool		bool
	select IRQ_DOMAIN		select IRQ_DOMAIN

			config ST_IRQCHIP
			bool
			select REGMAP
			select MFD_SYSCON
			help
			Enables SysCfg Controlled IRQs on STi based platforms.

	config TB10X_IRQC		config TB10X_IRQC
	bool		bool
	select IRQ_DOMAIN		select IRQ_DOMAIN

drivers/irqchip/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -33,6 +33,7 @@ obj-$(CONFIG_RENESAS_IRQC) += irq-renesas-irqc.o
	obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o		obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o
	obj-$(CONFIG_ARCH_NSPIRE) += irq-zevio.o		obj-$(CONFIG_ARCH_NSPIRE) += irq-zevio.o
	obj-$(CONFIG_ARCH_VT8500) += irq-vt8500.o		obj-$(CONFIG_ARCH_VT8500) += irq-vt8500.o
			obj-$(CONFIG_ST_IRQCHIP) += irq-st.o
	obj-$(CONFIG_TB10X_IRQC) += irq-tb10x.o		obj-$(CONFIG_TB10X_IRQC) += irq-tb10x.o
	obj-$(CONFIG_XTENSA) += irq-xtensa-pic.o		obj-$(CONFIG_XTENSA) += irq-xtensa-pic.o
	obj-$(CONFIG_XTENSA_MX) += irq-xtensa-mx.o		obj-$(CONFIG_XTENSA_MX) += irq-xtensa-mx.o

drivers/irqchip/irq-st.c

0 → 100644

+206 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* 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);