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Commit b772d7ae authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Linus Walleij
Browse files

gpio: remove ks8695 driver 



The platform is getting removed, so there are no remaining
users of this driver.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20190809202749.742267-4-arnd@arndb.de


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 40b0bcd3

drivers/gpio/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -67,7 +67,6 @@ obj-$(CONFIG_GPIO_IT87) += gpio-it87.o 
obj-$(CONFIG_GPIO_IXP4XX)		+= gpio-ixp4xx.o

obj-$(CONFIG_GPIO_JANZ_TTL)		+= gpio-janz-ttl.o

obj-$(CONFIG_GPIO_KEMPLD)		+= gpio-kempld.o

obj-$(CONFIG_ARCH_KS8695)		+= gpio-ks8695.o

obj-$(CONFIG_GPIO_LOONGSON1)		+= gpio-loongson1.o

obj-$(CONFIG_GPIO_LOONGSON)		+= gpio-loongson.o

obj-$(CONFIG_GPIO_LP3943)		+= gpio-lp3943.o

drivers/gpio/gpio-ks8695.c

deleted100644 → 0
+0 −284
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * arch/arm/mach-ks8695/gpio.c

 *

 * Copyright (C) 2006 Andrew Victor

 * Updated to GPIOLIB, Copyright 2008 Simtec Electronics

 *                     Daniel Silverstone <dsilvers@simtec.co.uk>

 */

#include <linux/gpio/driver.h>

#include <linux/kernel.h>

#include <linux/mm.h>

#include <linux/init.h>

#include <linux/debugfs.h>

#include <linux/seq_file.h>

#include <linux/module.h>

#include <linux/io.h>



#include <mach/hardware.h>

#include <asm/mach/irq.h>



#include <mach/regs-gpio.h>

#include <mach/gpio-ks8695.h>



/*

 * Configure a GPIO line for either GPIO function, or its internal

 * function (Interrupt, Timer, etc).

 */

static void ks8695_gpio_mode(unsigned int pin, short gpio)

{

	unsigned int enable[] = { IOPC_IOEINT0EN, IOPC_IOEINT1EN, IOPC_IOEINT2EN, IOPC_IOEINT3EN, IOPC_IOTIM0EN, IOPC_IOTIM1EN };

	unsigned long x, flags;



	if (pin > KS8695_GPIO_5)	/* only GPIO 0..5 have internal functions */

		return;



	local_irq_save(flags);



	x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPC);

	if (gpio)			/* GPIO: set bit to 0 */

		x &= ~enable[pin];

	else				/* Internal function: set bit to 1 */

		x |= enable[pin];

	__raw_writel(x, KS8695_GPIO_VA + KS8695_IOPC);



	local_irq_restore(flags);

}





static unsigned short gpio_irq[] = { KS8695_IRQ_EXTERN0, KS8695_IRQ_EXTERN1, KS8695_IRQ_EXTERN2, KS8695_IRQ_EXTERN3 };



/*

 * Configure GPIO pin as external interrupt source.

 */

int ks8695_gpio_interrupt(unsigned int pin, unsigned int type)

{

	unsigned long x, flags;



	if (pin > KS8695_GPIO_3)	/* only GPIO 0..3 can generate IRQ */

		return -EINVAL;



	local_irq_save(flags);



	/* set pin as input */

	x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPM);

	x &= ~IOPM(pin);

	__raw_writel(x, KS8695_GPIO_VA + KS8695_IOPM);



	local_irq_restore(flags);



	/* Set IRQ triggering type */

	irq_set_irq_type(gpio_irq[pin], type);



	/* enable interrupt mode */

	ks8695_gpio_mode(pin, 0);



	return 0;

}

EXPORT_SYMBOL(ks8695_gpio_interrupt);







/* .... Generic GPIO interface .............................................. */



/*

 * Configure the GPIO line as an input.

 */

static int ks8695_gpio_direction_input(struct gpio_chip *gc, unsigned int pin)

{

	unsigned long x, flags;



	if (pin > KS8695_GPIO_15)

		return -EINVAL;



	/* set pin to GPIO mode */

	ks8695_gpio_mode(pin, 1);



	local_irq_save(flags);



	/* set pin as input */

	x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPM);

	x &= ~IOPM(pin);

	__raw_writel(x, KS8695_GPIO_VA + KS8695_IOPM);



	local_irq_restore(flags);



	return 0;

}





/*

 * Configure the GPIO line as an output, with default state.

 */

static int ks8695_gpio_direction_output(struct gpio_chip *gc,

					unsigned int pin, int state)

{

	unsigned long x, flags;



	if (pin > KS8695_GPIO_15)

		return -EINVAL;



	/* set pin to GPIO mode */

	ks8695_gpio_mode(pin, 1);



	local_irq_save(flags);



	/* set line state */

	x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPD);

	if (state)

		x |= IOPD(pin);

	else

		x &= ~IOPD(pin);

	__raw_writel(x, KS8695_GPIO_VA + KS8695_IOPD);



	/* set pin as output */

	x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPM);

	x |= IOPM(pin);

	__raw_writel(x, KS8695_GPIO_VA + KS8695_IOPM);



	local_irq_restore(flags);



	return 0;

}





/*

 * Set the state of an output GPIO line.

 */

static void ks8695_gpio_set_value(struct gpio_chip *gc,

				  unsigned int pin, int state)

{

	unsigned long x, flags;



	if (pin > KS8695_GPIO_15)

		return;



	local_irq_save(flags);



	/* set output line state */

	x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPD);

	if (state)

		x |= IOPD(pin);

	else

		x &= ~IOPD(pin);

	__raw_writel(x, KS8695_GPIO_VA + KS8695_IOPD);



	local_irq_restore(flags);

}





/*

 * Read the state of a GPIO line.

 */

static int ks8695_gpio_get_value(struct gpio_chip *gc, unsigned int pin)

{

	unsigned long x;



	if (pin > KS8695_GPIO_15)

		return -EINVAL;



	x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPD);

	return (x & IOPD(pin)) != 0;

}





/*

 * Map GPIO line to IRQ number.

 */

static int ks8695_gpio_to_irq(struct gpio_chip *gc, unsigned int pin)

{

	if (pin > KS8695_GPIO_3)	/* only GPIO 0..3 can generate IRQ */

		return -EINVAL;



	return gpio_irq[pin];

}



/* GPIOLIB interface */



static struct gpio_chip ks8695_gpio_chip = {

	.label			= "KS8695",

	.direction_input	= ks8695_gpio_direction_input,

	.direction_output	= ks8695_gpio_direction_output,

	.get			= ks8695_gpio_get_value,

	.set			= ks8695_gpio_set_value,

	.to_irq			= ks8695_gpio_to_irq,

	.base			= 0,

	.ngpio			= 16,

	.can_sleep		= false,

};



/* Register the GPIOs */

void ks8695_register_gpios(void)

{

	if (gpiochip_add_data(&ks8695_gpio_chip, NULL))

		printk(KERN_ERR "Unable to register core GPIOs\n");

}



/* .... Debug interface ..................................................... */



#ifdef CONFIG_DEBUG_FS



static int ks8695_gpio_show(struct seq_file *s, void *unused)

{

	unsigned int enable[] = { IOPC_IOEINT0EN, IOPC_IOEINT1EN, IOPC_IOEINT2EN, IOPC_IOEINT3EN, IOPC_IOTIM0EN, IOPC_IOTIM1EN };

	unsigned int intmask[] = { IOPC_IOEINT0TM, IOPC_IOEINT1TM, IOPC_IOEINT2TM, IOPC_IOEINT3TM };

	unsigned long mode, ctrl, data;

	int i;



	mode = __raw_readl(KS8695_GPIO_VA + KS8695_IOPM);

	ctrl = __raw_readl(KS8695_GPIO_VA + KS8695_IOPC);

	data = __raw_readl(KS8695_GPIO_VA + KS8695_IOPD);



	seq_printf(s, "Pin\tI/O\tFunction\tState\n\n");



	for (i = KS8695_GPIO_0; i <= KS8695_GPIO_15 ; i++) {

		seq_printf(s, "%i:\t", i);



		seq_printf(s, "%s\t", (mode & IOPM(i)) ? "Output" : "Input");



		if (i <= KS8695_GPIO_3) {

			if (ctrl & enable[i]) {

				seq_printf(s, "EXT%i ", i);



				switch ((ctrl & intmask[i]) >> (4 * i)) {

				case IOPC_TM_LOW:

					seq_printf(s, "(Low)");		break;

				case IOPC_TM_HIGH:

					seq_printf(s, "(High)");	break;

				case IOPC_TM_RISING:

					seq_printf(s, "(Rising)");	break;

				case IOPC_TM_FALLING:

					seq_printf(s, "(Falling)");	break;

				case IOPC_TM_EDGE:

					seq_printf(s, "(Edges)");	break;

				}

			} else

				seq_printf(s, "GPIO\t");

		} else if (i <= KS8695_GPIO_5) {

			if (ctrl & enable[i])

				seq_printf(s, "TOUT%i\t", i - KS8695_GPIO_4);

			else

				seq_printf(s, "GPIO\t");

		} else {

			seq_printf(s, "GPIO\t");

		}



		seq_printf(s, "\t");



		seq_printf(s, "%i\n", (data & IOPD(i)) ? 1 : 0);

	}

	return 0;

}



DEFINE_SHOW_ATTRIBUTE(ks8695_gpio);



static int __init ks8695_gpio_debugfs_init(void)

{

	/* /sys/kernel/debug/ks8695_gpio */

	debugfs_create_file("ks8695_gpio", S_IFREG | S_IRUGO, NULL, NULL,

				&ks8695_gpio_fops);

	return 0;

}

postcore_initcall(ks8695_gpio_debugfs_init);



#endif