1 files changed, 0 insertions, 370 deletions

diff --git a/drivers/staging/mt7621-gpio/gpio-mt7621.c b/drivers/staging/mt7621-gpio/gpio-mt7621.c
deleted file mode 100644
index 0c4fb4a1b4a9..000000000000
--- a/drivers/staging/mt7621-gpio/gpio-mt7621.c
+++ /dev/null
@@ -1,370 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
- */
-
-#include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/gpio/driver.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irqdomain.h>
-#include <linux/module.h>
-#include <linux/of_irq.h>
-#include <linux/platform_device.h>
-#include <linux/spinlock.h>
-
-#define MTK_BANK_CNT		3
-#define MTK_BANK_WIDTH		32
-#define PIN_MASK(nr)		(1UL << ((nr % MTK_BANK_WIDTH)))
-
-enum mediatek_gpio_reg {
-	GPIO_REG_CTRL = 0,
-	GPIO_REG_POL,
-	GPIO_REG_DATA,
-	GPIO_REG_DSET,
-	GPIO_REG_DCLR,
-	GPIO_REG_REDGE,
-	GPIO_REG_FEDGE,
-	GPIO_REG_HLVL,
-	GPIO_REG_LLVL,
-	GPIO_REG_STAT,
-	GPIO_REG_EDGE,
-};
-
-struct mtk_gc {
-	struct gpio_chip chip;
-	spinlock_t lock;
-	int bank;
-	u32 rising;
-	u32 falling;
-};
-
-struct mtk_data {
-	void __iomem *gpio_membase;
-	int gpio_irq;
-	struct irq_domain *gpio_irq_domain;
-	struct mtk_gc gc_map[MTK_BANK_CNT];
-};
-
-static inline struct mtk_gc *
-to_mediatek_gpio(struct gpio_chip *chip)
-{
-	return container_of(chip, struct mtk_gc, chip);
-}
-
-static inline void
-mtk_gpio_w32(struct mtk_gc *rg, u8 reg, u32 val)
-{
-	struct mtk_data *gpio_data = gpiochip_get_data(&rg->chip);
-	u32 offset = (reg * 0x10) + (rg->bank * 0x4);
-
-	iowrite32(val, gpio_data->gpio_membase + offset);
-}
-
-static inline u32
-mtk_gpio_r32(struct mtk_gc *rg, u8 reg)
-{
-	struct mtk_data *gpio_data = gpiochip_get_data(&rg->chip);
-	u32 offset = (reg * 0x10) + (rg->bank * 0x4);
-
-	return ioread32(gpio_data->gpio_membase + offset);
-}
-
-static void
-mediatek_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
-{
-	struct mtk_gc *rg = to_mediatek_gpio(chip);
-
-	mtk_gpio_w32(rg, (value) ? GPIO_REG_DSET : GPIO_REG_DCLR, BIT(offset));
-}
-
-static int
-mediatek_gpio_get(struct gpio_chip *chip, unsigned int offset)
-{
-	struct mtk_gc *rg = to_mediatek_gpio(chip);
-
-	return !!(mtk_gpio_r32(rg, GPIO_REG_DATA) & BIT(offset));
-}
-
-static int
-mediatek_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
-{
-	struct mtk_gc *rg = to_mediatek_gpio(chip);
-	unsigned long flags;
-	u32 t;
-
-	spin_lock_irqsave(&rg->lock, flags);
-	t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
-	t &= ~BIT(offset);
-	mtk_gpio_w32(rg, GPIO_REG_CTRL, t);
-	spin_unlock_irqrestore(&rg->lock, flags);
-
-	return 0;
-}
-
-static int
-mediatek_gpio_direction_output(struct gpio_chip *chip,
-					unsigned int offset, int value)
-{
-	struct mtk_gc *rg = to_mediatek_gpio(chip);
-	unsigned long flags;
-	u32 t;
-
-	spin_lock_irqsave(&rg->lock, flags);
-	t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
-	t |= BIT(offset);
-	mtk_gpio_w32(rg, GPIO_REG_CTRL, t);
-	mediatek_gpio_set(chip, offset, value);
-	spin_unlock_irqrestore(&rg->lock, flags);
-
-	return 0;
-}
-
-static int
-mediatek_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
-{
-	struct mtk_gc *rg = to_mediatek_gpio(chip);
-	u32 t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
-
-	return (t & BIT(offset)) ? GPIOF_DIR_OUT : GPIOF_DIR_IN;
-}
-
-static int
-mediatek_gpio_to_irq(struct gpio_chip *chip, unsigned int pin)
-{
-	struct mtk_data *gpio_data = gpiochip_get_data(chip);
-	struct mtk_gc *rg = to_mediatek_gpio(chip);
-
-	return irq_create_mapping(gpio_data->gpio_irq_domain,
-				  pin + (rg->bank * MTK_BANK_WIDTH));
-}
-
-static int
-mediatek_gpio_bank_probe(struct platform_device *pdev, struct device_node *bank)
-{
-	struct mtk_data *gpio_data = dev_get_drvdata(&pdev->dev);
-	const __be32 *id = of_get_property(bank, "reg", NULL);
-	struct mtk_gc *rg;
-	int ret;
-
-	if (!id || be32_to_cpu(*id) >= MTK_BANK_CNT)
-		return -EINVAL;
-
-	rg = &gpio_data->gc_map[be32_to_cpu(*id)];
-	memset(rg, 0, sizeof(*rg));
-
-	spin_lock_init(&rg->lock);
-
-	rg->chip.parent = &pdev->dev;
-	rg->chip.label = dev_name(&pdev->dev);
-	rg->chip.of_node = bank;
-	rg->chip.base = MTK_BANK_WIDTH * be32_to_cpu(*id);
-	rg->chip.ngpio = MTK_BANK_WIDTH;
-	rg->chip.direction_input = mediatek_gpio_direction_input;
-	rg->chip.direction_output = mediatek_gpio_direction_output;
-	rg->chip.get_direction = mediatek_gpio_get_direction;
-	rg->chip.get = mediatek_gpio_get;
-	rg->chip.set = mediatek_gpio_set;
-	if (gpio_data->gpio_irq_domain)
-		rg->chip.to_irq = mediatek_gpio_to_irq;
-	rg->bank = be32_to_cpu(*id);
-
-	ret = devm_gpiochip_add_data(&pdev->dev, &rg->chip, gpio_data);
-	if (ret < 0) {
-		dev_err(&pdev->dev, "Could not register gpio %d, ret=%d\n",
-			rg->chip.ngpio, ret);
-		return ret;
-	}
-
-	/* set polarity to low for all gpios */
-	mtk_gpio_w32(rg, GPIO_REG_POL, 0);
-
-	dev_info(&pdev->dev, "registering %d gpios\n", rg->chip.ngpio);
-
-	return 0;
-}
-
-static void
-mediatek_gpio_irq_handler(struct irq_desc *desc)
-{
-	struct mtk_data *gpio_data = irq_desc_get_handler_data(desc);
-	int i;
-
-	for (i = 0; i < MTK_BANK_CNT; i++) {
-		struct mtk_gc *rg = &gpio_data->gc_map[i];
-		unsigned long pending;
-		int bit;
-
-		if (!rg)
-			continue;
-
-		pending = mtk_gpio_r32(rg, GPIO_REG_STAT);
-
-		for_each_set_bit(bit, &pending, MTK_BANK_WIDTH) {
-			u32 map = irq_find_mapping(gpio_data->gpio_irq_domain,
-						   (MTK_BANK_WIDTH * i) + bit);
-
-			generic_handle_irq(map);
-			mtk_gpio_w32(rg, GPIO_REG_STAT, BIT(bit));
-		}
-	}
-}
-
-static void
-mediatek_gpio_irq_unmask(struct irq_data *d)
-{
-	struct mtk_data *gpio_data = irq_data_get_irq_chip_data(d);
-	int pin = d->hwirq;
-	int bank = pin / MTK_BANK_WIDTH;
-	struct mtk_gc *rg = &gpio_data->gc_map[bank];
-	unsigned long flags;
-	u32 rise, fall;
-
-	if (!rg)
-		return;
-
-	spin_lock_irqsave(&rg->lock, flags);
-	rise = mtk_gpio_r32(rg, GPIO_REG_REDGE);
-	fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE);
-	mtk_gpio_w32(rg, GPIO_REG_REDGE, rise | (PIN_MASK(pin) & rg->rising));
-	mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall | (PIN_MASK(pin) & rg->falling));
-	spin_unlock_irqrestore(&rg->lock, flags);
-}
-
-static void
-mediatek_gpio_irq_mask(struct irq_data *d)
-{
-	struct mtk_data *gpio_data = irq_data_get_irq_chip_data(d);
-	int pin = d->hwirq;
-	int bank = pin / MTK_BANK_WIDTH;
-	struct mtk_gc *rg = &gpio_data->gc_map[bank];
-	unsigned long flags;
-	u32 rise, fall;
-
-	if (!rg)
-		return;
-
-	spin_lock_irqsave(&rg->lock, flags);
-	rise = mtk_gpio_r32(rg, GPIO_REG_REDGE);
-	fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE);
-	mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall & ~PIN_MASK(pin));
-	mtk_gpio_w32(rg, GPIO_REG_REDGE, rise & ~PIN_MASK(pin));
-	spin_unlock_irqrestore(&rg->lock, flags);
-}
-
-static int
-mediatek_gpio_irq_type(struct irq_data *d, unsigned int type)
-{
-	struct mtk_data *gpio_data = irq_data_get_irq_chip_data(d);
-	int pin = d->hwirq;
-	int bank = pin / MTK_BANK_WIDTH;
-	struct mtk_gc *rg = &gpio_data->gc_map[bank];
-	u32 mask = PIN_MASK(pin);
-
-	if (!rg)
-		return -1;
-
-	if (type == IRQ_TYPE_PROBE) {
-		if ((rg->rising | rg->falling) & mask)
-			return 0;
-
-		type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
-	}
-
-	if (type & IRQ_TYPE_EDGE_RISING)
-		rg->rising |= mask;
-	else
-		rg->rising &= ~mask;
-
-	if (type & IRQ_TYPE_EDGE_FALLING)
-		rg->falling |= mask;
-	else
-		rg->falling &= ~mask;
-
-	return 0;
-}
-
-static struct irq_chip mediatek_gpio_irq_chip = {
-	.name		= "GPIO",
-	.irq_unmask	= mediatek_gpio_irq_unmask,
-	.irq_mask	= mediatek_gpio_irq_mask,
-	.irq_mask_ack	= mediatek_gpio_irq_mask,
-	.irq_set_type	= mediatek_gpio_irq_type,
-};
-
-static int
-mediatek_gpio_gpio_map(struct irq_domain *d, unsigned int irq,
-		       irq_hw_number_t hw)
-{
-	int ret;
-
-	ret = irq_set_chip_data(irq, d->host_data);
-	if (ret < 0)
-		return ret;
-	irq_set_chip_and_handler(irq, &mediatek_gpio_irq_chip,
-				 handle_level_irq);
-	irq_set_handler_data(irq, d);
-
-	return 0;
-}
-
-static const struct irq_domain_ops irq_domain_ops = {
-	.xlate = irq_domain_xlate_twocell,
-	.map = mediatek_gpio_gpio_map,
-};
-
-static int
-mediatek_gpio_probe(struct platform_device *pdev)
-{
-	struct device_node *bank, *np = pdev->dev.of_node;
-	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	struct mtk_data *gpio_data;
-
-	gpio_data = devm_kzalloc(&pdev->dev, sizeof(*gpio_data), GFP_KERNEL);
-	if (!gpio_data)
-		return -ENOMEM;
-
-	gpio_data->gpio_membase = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(gpio_data->gpio_membase))
-		return PTR_ERR(gpio_data->gpio_membase);
-
-	gpio_data->gpio_irq = irq_of_parse_and_map(np, 0);
-	if (gpio_data->gpio_irq) {
-		gpio_data->gpio_irq_domain = irq_domain_add_linear(np,
-			MTK_BANK_CNT * MTK_BANK_WIDTH,
-			&irq_domain_ops, gpio_data);
-		if (!gpio_data->gpio_irq_domain)
-			dev_err(&pdev->dev, "irq_domain_add_linear failed\n");
-	}
-
-	platform_set_drvdata(pdev, gpio_data);
-
-	for_each_child_of_node(np, bank)
-		if (of_device_is_compatible(bank, "mediatek,mt7621-gpio-bank"))
-			mediatek_gpio_bank_probe(pdev, bank);
-
-	if (gpio_data->gpio_irq_domain)
-		irq_set_chained_handler_and_data(gpio_data->gpio_irq,
-						 mediatek_gpio_irq_handler,
-						 gpio_data);
-
-	return 0;
-}
-
-static const struct of_device_id mediatek_gpio_match[] = {
-	{ .compatible = "mediatek,mt7621-gpio" },
-	{},
-};
-MODULE_DEVICE_TABLE(of, mediatek_gpio_match);
-
-static struct platform_driver mediatek_gpio_driver = {
-	.probe = mediatek_gpio_probe,
-	.driver = {
-		.name = "mt7621_gpio",
-		.of_match_table = mediatek_gpio_match,
-	},
-};
-
-module_platform_driver(mediatek_gpio_driver);