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Commit 9dacc6de authored by Alexander Shiyan's avatar Alexander Shiyan Committed by Linus Walleij
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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
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Showing with 53 additions and 121 deletions
drivers/gpio/gpio-ge.c
View file @ 9dacc6de
......@@ -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)
{
struct of_mm_gpio_chip *mmchip = to_of_mm_gpio_chip(chip);
_gef_gpio_set(mmchip->regs + GEF_GPIO_OUT, offset, value);
}
static const struct of_device_id gef_gpio_ids[] = {
{
.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;
}
const struct of_device_id *of_id =
of_match_device(gef_gpio_ids, &pdev->dev);
struct of_mm_gpio_chip *mmchip;
/* 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") {
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");
......
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