Commit 9dacc6de authored by Alexander Shiyan's avatar Alexander Shiyan Committed by Linus Walleij
Browse files

gpio: ge: Convert to platform driver 



This patch converts GE I/O FPGA GPIO driver to platform driver.

Signed-off-by: default avatarAlexander Shiyan <shc_work@mail.ru>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent ccd9726e

drivers/gpio/gpio-ge.c

+53 −121
Original line number Diff line number Diff line
@@ -18,15 +18,9 @@ 
 */



#include <linux/kernel.h>

#include <linux/compiler.h>

#include <linux/init.h>

#include <linux/io.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/of_platform.h>

#include <linux/of_gpio.h>

#include <linux/gpio.h>

#include <linux/slab.h>

#include <linux/module.h>



#define GEF_GPIO_DIRECT		0x00
@@ -39,28 +33,26 @@ 
#define GEF_GPIO_OVERRUN	0x1C

#define GEF_GPIO_MODE		0x20



static void _gef_gpio_set(void __iomem *reg, unsigned int offset, int value)

static void gef_gpio_set(struct gpio_chip *chip, unsigned offset, int value)

{

	struct of_mm_gpio_chip *mmchip = to_of_mm_gpio_chip(chip);

	unsigned int data;



	data = ioread32be(reg);

	/* value: 0=low; 1=high */

	if (value & 0x1)

		data = data | (0x1 << offset);

	data = ioread32be(mmchip->regs + GEF_GPIO_OUT);

	if (value)

		data = data | BIT(offset);

	else

		data = data & ~(0x1 << offset);



	iowrite32be(data, reg);

		data = data & ~BIT(offset);

	iowrite32be(data, mmchip->regs + GEF_GPIO_OUT);

}





static int gef_gpio_dir_in(struct gpio_chip *chip, unsigned offset)

{

	unsigned int data;

	struct of_mm_gpio_chip *mmchip = to_of_mm_gpio_chip(chip);



	data = ioread32be(mmchip->regs + GEF_GPIO_DIRECT);

	data = data | (0x1 << offset);

	data = data | BIT(offset);

	iowrite32be(data, mmchip->regs + GEF_GPIO_DIRECT);



	return 0;
@@ -71,11 +63,11 @@ static int gef_gpio_dir_out(struct gpio_chip *chip, unsigned offset, int value) 
	unsigned int data;

	struct of_mm_gpio_chip *mmchip = to_of_mm_gpio_chip(chip);



	/* Set direction before switching to input */

	_gef_gpio_set(mmchip->regs + GEF_GPIO_OUT, offset, value);

	/* Set value before switching to output */

	gef_gpio_set(mmchip->regs + GEF_GPIO_OUT, offset, value);



	data = ioread32be(mmchip->regs + GEF_GPIO_DIRECT);

	data = data & ~(0x1 << offset);

	data = data & ~BIT(offset);

	iowrite32be(data, mmchip->regs + GEF_GPIO_DIRECT);



	return 0;
@@ -83,116 +75,56 @@ static int gef_gpio_dir_out(struct gpio_chip *chip, unsigned offset, int value) 


static int gef_gpio_get(struct gpio_chip *chip, unsigned offset)

{

	unsigned int data;

	int state = 0;

	struct of_mm_gpio_chip *mmchip = to_of_mm_gpio_chip(chip);



	data = ioread32be(mmchip->regs + GEF_GPIO_IN);

	state = (int)((data >> offset) & 0x1);



	return state;

	return !!(ioread32be(mmchip->regs + GEF_GPIO_IN) & BIT(offset));

}



static void gef_gpio_set(struct gpio_chip *chip, unsigned offset, int value)

static const struct of_device_id gef_gpio_ids[] = {

	{

	struct of_mm_gpio_chip *mmchip = to_of_mm_gpio_chip(chip);



	_gef_gpio_set(mmchip->regs + GEF_GPIO_OUT, offset, value);

}

		.compatible	= "gef,sbc610-gpio",

		.data		= (void *)19,

	}, {

		.compatible	= "gef,sbc310-gpio",

		.data		= (void *)6,

	}, {

		.compatible	= "ge,imp3a-gpio",

		.data		= (void *)16,

	},

	{ }

};

MODULE_DEVICE_TABLE(of, gef_gpio_ids);



static int __init gef_gpio_init(void)

static int __init gef_gpio_probe(struct platform_device *pdev)

{

	struct device_node *np;

	int retval;

	struct of_mm_gpio_chip *gef_gpio_chip;



	for_each_compatible_node(np, NULL, "gef,sbc610-gpio") {



		pr_debug("%s: Initialising GEF GPIO\n", np->full_name);



		/* Allocate chip structure */

		gef_gpio_chip = kzalloc(sizeof(*gef_gpio_chip), GFP_KERNEL);

		if (!gef_gpio_chip) {

			pr_err("%s: Unable to allocate structure\n",

				np->full_name);

			continue;

		}



		/* Setup pointers to chip functions */

		gef_gpio_chip->gc.of_gpio_n_cells = 2;

		gef_gpio_chip->gc.ngpio = 19;

		gef_gpio_chip->gc.direction_input = gef_gpio_dir_in;

		gef_gpio_chip->gc.direction_output = gef_gpio_dir_out;

		gef_gpio_chip->gc.get = gef_gpio_get;

		gef_gpio_chip->gc.set = gef_gpio_set;



		/* This function adds a memory mapped GPIO chip */

		retval = of_mm_gpiochip_add(np, gef_gpio_chip);

		if (retval) {

			kfree(gef_gpio_chip);

			pr_err("%s: Unable to add GPIO\n", np->full_name);

		}

	}



	for_each_compatible_node(np, NULL, "gef,sbc310-gpio") {

	const struct of_device_id *of_id =

		of_match_device(gef_gpio_ids, &pdev->dev);

	struct of_mm_gpio_chip *mmchip;



		pr_debug("%s: Initialising GEF GPIO\n", np->full_name);



		/* Allocate chip structure */

		gef_gpio_chip = kzalloc(sizeof(*gef_gpio_chip), GFP_KERNEL);

		if (!gef_gpio_chip) {

			pr_err("%s: Unable to allocate structure\n",

				np->full_name);

			continue;

		}

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

	if (!mmchip)

		return -ENOMEM;



	/* Setup pointers to chip functions */

		gef_gpio_chip->gc.of_gpio_n_cells = 2;

		gef_gpio_chip->gc.ngpio = 6;

		gef_gpio_chip->gc.direction_input = gef_gpio_dir_in;

		gef_gpio_chip->gc.direction_output = gef_gpio_dir_out;

		gef_gpio_chip->gc.get = gef_gpio_get;

		gef_gpio_chip->gc.set = gef_gpio_set;

	mmchip->gc.ngpio = (u16)(uintptr_t)of_id->data;

	mmchip->gc.of_gpio_n_cells = 2;

	mmchip->gc.direction_input = gef_gpio_dir_in;

	mmchip->gc.direction_output = gef_gpio_dir_out;

	mmchip->gc.get = gef_gpio_get;

	mmchip->gc.set = gef_gpio_set;



	/* This function adds a memory mapped GPIO chip */

		retval = of_mm_gpiochip_add(np, gef_gpio_chip);

		if (retval) {

			kfree(gef_gpio_chip);

			pr_err("%s: Unable to add GPIO\n", np->full_name);

		}

	}



	for_each_compatible_node(np, NULL, "ge,imp3a-gpio") {



		pr_debug("%s: Initialising GE GPIO\n", np->full_name);



		/* Allocate chip structure */

		gef_gpio_chip = kzalloc(sizeof(*gef_gpio_chip), GFP_KERNEL);

		if (!gef_gpio_chip) {

			pr_err("%s: Unable to allocate structure\n",

				np->full_name);

			continue;

		}



		/* Setup pointers to chip functions */

		gef_gpio_chip->gc.of_gpio_n_cells = 2;

		gef_gpio_chip->gc.ngpio = 16;

		gef_gpio_chip->gc.direction_input = gef_gpio_dir_in;

		gef_gpio_chip->gc.direction_output = gef_gpio_dir_out;

		gef_gpio_chip->gc.get = gef_gpio_get;

		gef_gpio_chip->gc.set = gef_gpio_set;



		/* This function adds a memory mapped GPIO chip */

		retval = of_mm_gpiochip_add(np, gef_gpio_chip);

		if (retval) {

			kfree(gef_gpio_chip);

			pr_err("%s: Unable to add GPIO\n", np->full_name);

		}

	}

	return of_mm_gpiochip_add(pdev->dev.of_node, mmchip);

};



	return 0;

static struct platform_driver gef_gpio_driver = {

	.driver = {

		.name		= "gef-gpio",

		.owner		= THIS_MODULE,

		.of_match_table	= gef_gpio_ids,

	},

};

arch_initcall(gef_gpio_init);

module_platform_driver_probe(gef_gpio_driver, gef_gpio_probe);



MODULE_DESCRIPTION("GE I/O FPGA GPIO driver");

MODULE_AUTHOR("Martyn Welch <martyn.welch@ge.com");