gpio: remove etraxfs driver

The cris architecture is getting removed, so we no longer need the
etraxfs driver.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Documentation/devicetree/bindings/gpio/gpio-etraxfs.txt

@@ -1,22 +0,0 @@
-Axis ETRAX FS General I/O controller bindings
-
-Required properties:
-
-- compatible: one of:
-  - "axis,etraxfs-gio"
-  - "axis,artpec3-gio"
-- reg: Physical base address and length of the controller's registers.
-- #gpio-cells: Should be 3
-  - The first cell is the gpio offset number.
-  - The second cell is reserved and is currently unused.
-  - The third cell is the port number (hex).
-- gpio-controller: Marks the device node as a GPIO controller.
-
-Example:
-
-	gio: gpio@b001a000 {
-		compatible = "axis,etraxfs-gio";
-		reg = <0xb001a000 0x1000>;
-		gpio-controller;
-		#gpio-cells = <3>;
-	};

drivers/gpio/Kconfig

@@ -170,15 +170,6 @@ config GPIO_EP93XX
 	depends on ARCH_EP93XX
 	select GPIO_GENERIC
 
-config GPIO_ETRAXFS
-	bool "Axis ETRAX FS General I/O"
-	depends on CRIS || COMPILE_TEST
-	depends on OF_GPIO
-	select GPIO_GENERIC
-	select GPIOLIB_IRQCHIP
-	help
-	  Say yes here to support the GPIO controller on Axis ETRAX FS SoCs.
-
 config GPIO_EXAR
 	tristate "Support for GPIO pins on XR17V352/354/358"
 	depends on SERIAL_8250_EXAR

drivers/gpio/Makefile

@@ -46,7 +46,6 @@ obj-$(CONFIG_GPIO_DLN2)		+= gpio-dln2.o
 obj-$(CONFIG_GPIO_DWAPB)	+= gpio-dwapb.o
 obj-$(CONFIG_GPIO_EM)		+= gpio-em.o
 obj-$(CONFIG_GPIO_EP93XX)	+= gpio-ep93xx.o
-obj-$(CONFIG_GPIO_ETRAXFS)	+= gpio-etraxfs.o
 obj-$(CONFIG_GPIO_EXAR)		+= gpio-exar.o
 obj-$(CONFIG_GPIO_F7188X)	+= gpio-f7188x.o
 obj-$(CONFIG_GPIO_FTGPIO010)	+= gpio-ftgpio010.o

drivers/gpio/gpio-etraxfs.c

@@ -1,475 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/gpio/driver.h>
-#include <linux/of_gpio.h>
-#include <linux/io.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-
-#define ETRAX_FS_rw_pa_dout	0
-#define ETRAX_FS_r_pa_din	4
-#define ETRAX_FS_rw_pa_oe	8
-#define ETRAX_FS_rw_intr_cfg	12
-#define ETRAX_FS_rw_intr_mask	16
-#define ETRAX_FS_rw_ack_intr	20
-#define ETRAX_FS_r_intr		24
-#define ETRAX_FS_r_masked_intr	28
-#define ETRAX_FS_rw_pb_dout	32
-#define ETRAX_FS_r_pb_din	36
-#define ETRAX_FS_rw_pb_oe	40
-#define ETRAX_FS_rw_pc_dout	48
-#define ETRAX_FS_r_pc_din	52
-#define ETRAX_FS_rw_pc_oe	56
-#define ETRAX_FS_rw_pd_dout	64
-#define ETRAX_FS_r_pd_din	68
-#define ETRAX_FS_rw_pd_oe	72
-#define ETRAX_FS_rw_pe_dout	80
-#define ETRAX_FS_r_pe_din	84
-#define ETRAX_FS_rw_pe_oe	88
-
-#define ARTPEC3_r_pa_din	0
-#define ARTPEC3_rw_pa_dout	4
-#define ARTPEC3_rw_pa_oe	8
-#define ARTPEC3_r_pb_din	44
-#define ARTPEC3_rw_pb_dout	48
-#define ARTPEC3_rw_pb_oe	52
-#define ARTPEC3_r_pc_din	88
-#define ARTPEC3_rw_pc_dout	92
-#define ARTPEC3_rw_pc_oe	96
-#define ARTPEC3_r_pd_din	116
-#define ARTPEC3_rw_intr_cfg	120
-#define ARTPEC3_rw_intr_pins	124
-#define ARTPEC3_rw_intr_mask	128
-#define ARTPEC3_rw_ack_intr	132
-#define ARTPEC3_r_masked_intr	140
-
-#define GIO_CFG_OFF		0
-#define GIO_CFG_HI		1
-#define GIO_CFG_LO		2
-#define GIO_CFG_SET		3
-#define GIO_CFG_POSEDGE		5
-#define GIO_CFG_NEGEDGE		6
-#define GIO_CFG_ANYEDGE		7
-
-struct etraxfs_gpio_info;
-
-struct etraxfs_gpio_block {
-	raw_spinlock_t lock;
-	u32 mask;
-	u32 cfg;
-	u32 pins;
-	unsigned int group[8];
-
-	void __iomem *regs;
-	const struct etraxfs_gpio_info *info;
-};
-
-struct etraxfs_gpio_chip {
-	struct gpio_chip gc;
-	struct etraxfs_gpio_block *block;
-};
-
-struct etraxfs_gpio_port {
-	const char *label;
-	unsigned int oe;
-	unsigned int dout;
-	unsigned int din;
-	unsigned int ngpio;
-};
-
-struct etraxfs_gpio_info {
-	unsigned int num_ports;
-	const struct etraxfs_gpio_port *ports;
-
-	unsigned int rw_ack_intr;
-	unsigned int rw_intr_mask;
-	unsigned int rw_intr_cfg;
-	unsigned int rw_intr_pins;
-	unsigned int r_masked_intr;
-};
-
-static const struct etraxfs_gpio_port etraxfs_gpio_etraxfs_ports[] = {
-	{
-		.label	= "A",
-		.ngpio	= 8,
-		.oe	= ETRAX_FS_rw_pa_oe,
-		.dout	= ETRAX_FS_rw_pa_dout,
-		.din	= ETRAX_FS_r_pa_din,
-	},
-	{
-		.label	= "B",
-		.ngpio	= 18,
-		.oe	= ETRAX_FS_rw_pb_oe,
-		.dout	= ETRAX_FS_rw_pb_dout,
-		.din	= ETRAX_FS_r_pb_din,
-	},
-	{
-		.label	= "C",
-		.ngpio	= 18,
-		.oe	= ETRAX_FS_rw_pc_oe,
-		.dout	= ETRAX_FS_rw_pc_dout,
-		.din	= ETRAX_FS_r_pc_din,
-	},
-	{
-		.label	= "D",
-		.ngpio	= 18,
-		.oe	= ETRAX_FS_rw_pd_oe,
-		.dout	= ETRAX_FS_rw_pd_dout,
-		.din	= ETRAX_FS_r_pd_din,
-	},
-	{
-		.label	= "E",
-		.ngpio	= 18,
-		.oe	= ETRAX_FS_rw_pe_oe,
-		.dout	= ETRAX_FS_rw_pe_dout,
-		.din	= ETRAX_FS_r_pe_din,
-	},
-};
-
-static const struct etraxfs_gpio_info etraxfs_gpio_etraxfs = {
-	.num_ports = ARRAY_SIZE(etraxfs_gpio_etraxfs_ports),
-	.ports = etraxfs_gpio_etraxfs_ports,
-	.rw_ack_intr	= ETRAX_FS_rw_ack_intr,
-	.rw_intr_mask	= ETRAX_FS_rw_intr_mask,
-	.rw_intr_cfg	= ETRAX_FS_rw_intr_cfg,
-	.r_masked_intr	= ETRAX_FS_r_masked_intr,
-};
-
-static const struct etraxfs_gpio_port etraxfs_gpio_artpec3_ports[] = {
-	{
-		.label	= "A",
-		.ngpio	= 32,
-		.oe	= ARTPEC3_rw_pa_oe,
-		.dout	= ARTPEC3_rw_pa_dout,
-		.din	= ARTPEC3_r_pa_din,
-	},
-	{
-		.label	= "B",
-		.ngpio	= 32,
-		.oe	= ARTPEC3_rw_pb_oe,
-		.dout	= ARTPEC3_rw_pb_dout,
-		.din	= ARTPEC3_r_pb_din,
-	},
-	{
-		.label	= "C",
-		.ngpio	= 16,
-		.oe	= ARTPEC3_rw_pc_oe,
-		.dout	= ARTPEC3_rw_pc_dout,
-		.din	= ARTPEC3_r_pc_din,
-	},
-	{
-		.label	= "D",
-		.ngpio	= 32,
-		.din	= ARTPEC3_r_pd_din,
-	},
-};
-
-static const struct etraxfs_gpio_info etraxfs_gpio_artpec3 = {
-	.num_ports = ARRAY_SIZE(etraxfs_gpio_artpec3_ports),
-	.ports = etraxfs_gpio_artpec3_ports,
-	.rw_ack_intr	= ARTPEC3_rw_ack_intr,
-	.rw_intr_mask	= ARTPEC3_rw_intr_mask,
-	.rw_intr_cfg	= ARTPEC3_rw_intr_cfg,
-	.r_masked_intr	= ARTPEC3_r_masked_intr,
-	.rw_intr_pins	= ARTPEC3_rw_intr_pins,
-};
-
-static unsigned int etraxfs_gpio_chip_to_port(struct gpio_chip *gc)
-{
-	return gc->label[0] - 'A';
-}
-
-static int etraxfs_gpio_of_xlate(struct gpio_chip *gc,
-			       const struct of_phandle_args *gpiospec,
-			       u32 *flags)
-{
-	/*
-	 * Port numbers are A to E, and the properties are integers, so we
-	 * specify them as 0xA - 0xE.
-	 */
-	if (etraxfs_gpio_chip_to_port(gc) + 0xA != gpiospec->args[2])
-		return -EINVAL;
-
-	return of_gpio_simple_xlate(gc, gpiospec, flags);
-}
-
-static const struct of_device_id etraxfs_gpio_of_table[] = {
-	{
-		.compatible = "axis,etraxfs-gio",
-		.data = &etraxfs_gpio_etraxfs,
-	},
-	{
-		.compatible = "axis,artpec3-gio",
-		.data = &etraxfs_gpio_artpec3,
-	},
-	{},
-};
-
-static unsigned int etraxfs_gpio_to_group_irq(unsigned int gpio)
-{
-	return gpio % 8;
-}
-
-static unsigned int etraxfs_gpio_to_group_pin(struct etraxfs_gpio_chip *chip,
-					      unsigned int gpio)
-{
-	return 4 * etraxfs_gpio_chip_to_port(&chip->gc) + gpio / 8;
-}
-
-static void etraxfs_gpio_irq_ack(struct irq_data *d)
-{
-	struct etraxfs_gpio_chip *chip =
-		gpiochip_get_data(irq_data_get_irq_chip_data(d));
-	struct etraxfs_gpio_block *block = chip->block;
-	unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
-
-	writel(BIT(grpirq), block->regs + block->info->rw_ack_intr);
-}
-
-static void etraxfs_gpio_irq_mask(struct irq_data *d)
-{
-	struct etraxfs_gpio_chip *chip =
-		gpiochip_get_data(irq_data_get_irq_chip_data(d));
-	struct etraxfs_gpio_block *block = chip->block;
-	unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
-
-	raw_spin_lock(&block->lock);
-	block->mask &= ~BIT(grpirq);
-	writel(block->mask, block->regs + block->info->rw_intr_mask);
-	raw_spin_unlock(&block->lock);
-}
-
-static void etraxfs_gpio_irq_unmask(struct irq_data *d)
-{
-	struct etraxfs_gpio_chip *chip =
-		gpiochip_get_data(irq_data_get_irq_chip_data(d));
-	struct etraxfs_gpio_block *block = chip->block;
-	unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
-
-	raw_spin_lock(&block->lock);
-	block->mask |= BIT(grpirq);
-	writel(block->mask, block->regs + block->info->rw_intr_mask);
-	raw_spin_unlock(&block->lock);
-}
-
-static int etraxfs_gpio_irq_set_type(struct irq_data *d, u32 type)
-{
-	struct etraxfs_gpio_chip *chip =
-		gpiochip_get_data(irq_data_get_irq_chip_data(d));
-	struct etraxfs_gpio_block *block = chip->block;
-	unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
-	u32 cfg;
-
-	switch (type) {
-	case IRQ_TYPE_EDGE_RISING:
-		cfg = GIO_CFG_POSEDGE;
-		break;
-	case IRQ_TYPE_EDGE_FALLING:
-		cfg = GIO_CFG_NEGEDGE;
-		break;
-	case IRQ_TYPE_EDGE_BOTH:
-		cfg = GIO_CFG_ANYEDGE;
-		break;
-	case IRQ_TYPE_LEVEL_LOW:
-		cfg = GIO_CFG_LO;
-		break;
-	case IRQ_TYPE_LEVEL_HIGH:
-		cfg = GIO_CFG_HI;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	raw_spin_lock(&block->lock);
-	block->cfg &= ~(0x7 << (grpirq * 3));
-	block->cfg |= (cfg << (grpirq * 3));
-	writel(block->cfg, block->regs + block->info->rw_intr_cfg);
-	raw_spin_unlock(&block->lock);
-
-	return 0;
-}
-
-static int etraxfs_gpio_irq_request_resources(struct irq_data *d)
-{
-	struct etraxfs_gpio_chip *chip =
-		gpiochip_get_data(irq_data_get_irq_chip_data(d));
-	struct etraxfs_gpio_block *block = chip->block;
-	unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
-	int ret = -EBUSY;
-
-	raw_spin_lock(&block->lock);
-	if (block->group[grpirq])
-		goto out;
-
-	ret = gpiochip_lock_as_irq(&chip->gc, d->hwirq);
-	if (ret)
-		goto out;
-
-	block->group[grpirq] = d->irq;
-	if (block->info->rw_intr_pins) {
-		unsigned int pin = etraxfs_gpio_to_group_pin(chip, d->hwirq);
-
-		block->pins &= ~(0xf << (grpirq * 4));
-		block->pins |= (pin << (grpirq * 4));
-
-		writel(block->pins, block->regs + block->info->rw_intr_pins);
-	}
-
-out:
-	raw_spin_unlock(&block->lock);
-	return ret;
-}
-
-static void etraxfs_gpio_irq_release_resources(struct irq_data *d)
-{
-	struct etraxfs_gpio_chip *chip =
-		gpiochip_get_data(irq_data_get_irq_chip_data(d));
-	struct etraxfs_gpio_block *block = chip->block;
-	unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
-
-	raw_spin_lock(&block->lock);
-	block->group[grpirq] = 0;
-	gpiochip_unlock_as_irq(&chip->gc, d->hwirq);
-	raw_spin_unlock(&block->lock);
-}
-
-static struct irq_chip etraxfs_gpio_irq_chip = {
-	.name		= "gpio-etraxfs",
-	.irq_ack	= etraxfs_gpio_irq_ack,
-	.irq_mask	= etraxfs_gpio_irq_mask,
-	.irq_unmask	= etraxfs_gpio_irq_unmask,
-	.irq_set_type	= etraxfs_gpio_irq_set_type,
-	.irq_request_resources = etraxfs_gpio_irq_request_resources,
-	.irq_release_resources = etraxfs_gpio_irq_release_resources,
-};
-
-static irqreturn_t etraxfs_gpio_interrupt(int irq, void *dev_id)
-{
-	struct etraxfs_gpio_block *block = dev_id;
-	unsigned long intr = readl(block->regs + block->info->r_masked_intr);
-	int bit;
-
-	for_each_set_bit(bit, &intr, 8)
-		generic_handle_irq(block->group[bit]);
-
-	return IRQ_RETVAL(intr & 0xff);
-}
-
-static int etraxfs_gpio_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	const struct etraxfs_gpio_info *info;
-	const struct of_device_id *match;
-	struct etraxfs_gpio_block *block;
-	struct etraxfs_gpio_chip *chips;
-	struct resource *res, *irq;
-	bool allportsirq = false;
-	void __iomem *regs;
-	int ret;
-	int i;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	regs = devm_ioremap_resource(dev, res);
-	if (IS_ERR(regs))
-		return PTR_ERR(regs);
-
-	match = of_match_node(etraxfs_gpio_of_table, dev->of_node);
-	if (!match)
-		return -EINVAL;
-
-	info = match->data;
-
-	chips = devm_kzalloc(dev, sizeof(*chips) * info->num_ports, GFP_KERNEL);
-	if (!chips)
-		return -ENOMEM;
-
-	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!irq)
-		return -EINVAL;
-
-	block = devm_kzalloc(dev, sizeof(*block), GFP_KERNEL);
-	if (!block)
-		return -ENOMEM;
-
-	raw_spin_lock_init(&block->lock);
-
-	block->regs = regs;
-	block->info = info;
-
-	writel(0, block->regs + info->rw_intr_mask);
-	writel(0, block->regs + info->rw_intr_cfg);
-	if (info->rw_intr_pins) {
-		allportsirq = true;
-		writel(0, block->regs + info->rw_intr_pins);
-	}
-
-	ret = devm_request_irq(dev, irq->start, etraxfs_gpio_interrupt,
-			       IRQF_SHARED, dev_name(dev), block);
-	if (ret) {
-		dev_err(dev, "Unable to request irq %d\n", ret);
-		return ret;
-	}
-
-	for (i = 0; i < info->num_ports; i++) {
-		struct etraxfs_gpio_chip *chip = &chips[i];
-		struct gpio_chip *gc = &chip->gc;
-		const struct etraxfs_gpio_port *port = &info->ports[i];
-		unsigned long flags = BGPIOF_READ_OUTPUT_REG_SET;
-		void __iomem *dat = regs + port->din;
-		void __iomem *set = regs + port->dout;
-		void __iomem *dirout = regs + port->oe;
-
-		chip->block = block;
-
-		if (dirout == set) {
-			dirout = set = NULL;
-			flags = BGPIOF_NO_OUTPUT;
-		}
-
-		ret = bgpio_init(gc, dev, 4,
-				 dat, set, NULL, dirout, NULL,
-				 flags);
-		if (ret) {
-			dev_err(dev, "Unable to init port %s\n",
-				port->label);
-			continue;
-		}
-
-		gc->ngpio = port->ngpio;
-		gc->label = port->label;
-
-		gc->of_node = dev->of_node;
-		gc->of_gpio_n_cells = 3;
-		gc->of_xlate = etraxfs_gpio_of_xlate;
-
-		ret = gpiochip_add_data(gc, chip);
-		if (ret) {
-			dev_err(dev, "Unable to register port %s\n",
-				gc->label);
-			continue;
-		}
-
-		if (i > 0 && !allportsirq)
-			continue;
-
-		ret = gpiochip_irqchip_add(gc, &etraxfs_gpio_irq_chip, 0,
-					   handle_level_irq, IRQ_TYPE_NONE);
-		if (ret) {
-			dev_err(dev, "Unable to add irqchip to port %s\n",
-				gc->label);
-		}
-	}
-
-	return 0;
-}
-
-static struct platform_driver etraxfs_gpio_driver = {
-	.driver = {
-		.name		= "etraxfs-gpio",
-		.of_match_table = of_match_ptr(etraxfs_gpio_of_table),
-	},
-	.probe	= etraxfs_gpio_probe,
-};
-
-builtin_platform_driver(etraxfs_gpio_driver);