This patch converts GE I/O FPGA GPIO driver to platform driver.
Signed-off-by: Alexander Shiyan shc_w...@mail.ru
---
drivers/gpio/gpio-ge.c | 174 +++--
1 file changed, 53 insertions(+), 121 deletions(-)
diff --git a/drivers/gpio/gpio-ge.c b/drivers/gpio/gpio-ge.c
index 7b95a4a..1237a73 100644
--- a/drivers/gpio/gpio-ge.c
+++ b/drivers/gpio/gpio-ge.c
@@ -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_DIRECT0x00
@@ -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;
- }
-
- /* 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);
