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mdio-mux-gpio: Use GPIO descriptor interface and new gpiod_set_array function

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Convert mdio-mux-gpio to the GPIO descriptor interface and use the new
gpiod_set_array function to set all output signals simultaneously.

Signed-off-by: Rojhalat Ibrahim <imr@rtschenk.de>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Rojhalat Ibrahim 2014-11-25 10:31:18 +01:00 committed by Linus Walleij
parent 8e53b0f190
commit 441e002624
1 changed files with 13 additions and 24 deletions
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37
drivers/net/phy/mdio-mux-gpio.c
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@ -14,13 +14,13 @@
#include <linux/mdio-mux.h>
#include <linux/of_gpio.h>
#define DRV_VERSION "1.0"
#define DRV_VERSION "1.1"
#define DRV_DESCRIPTION "GPIO controlled MDIO bus multiplexer driver"
#define MDIO_MUX_GPIO_MAX_BITS 8
struct mdio_mux_gpio_state {
int gpio[MDIO_MUX_GPIO_MAX_BITS];
struct gpio_desc *gpio[MDIO_MUX_GPIO_MAX_BITS];
unsigned int num_gpios;
void *mux_handle;
};
@ -28,29 +28,23 @@ struct mdio_mux_gpio_state {
static int mdio_mux_gpio_switch_fn(int current_child, int desired_child,
void *data)
{
int change;
int values[MDIO_MUX_GPIO_MAX_BITS];
unsigned int n;
struct mdio_mux_gpio_state *s = data;
if (current_child == desired_child)
return 0;
change = current_child == -1 ? -1 : current_child ^ desired_child;
for (n = 0; n < s->num_gpios; n++) {
if (change & 1)
gpio_set_value_cansleep(s->gpio[n],
(desired_child & 1) != 0);
change >>= 1;
desired_child >>= 1;
values[n] = (desired_child >> n) & 1;
}
gpiod_set_array_cansleep(s->num_gpios, s->gpio, values);
return 0;
}
static int mdio_mux_gpio_probe(struct platform_device *pdev)
{
enum of_gpio_flags f;
struct mdio_mux_gpio_state *s;
int num_gpios;
unsigned int n;
@ -70,22 +64,14 @@ static int mdio_mux_gpio_probe(struct platform_device *pdev)
s->num_gpios = num_gpios;
for (n = 0; n < num_gpios; ) {
int gpio = of_get_gpio_flags(pdev->dev.of_node, n, &f);
if (gpio < 0) {
r = (gpio == -ENODEV) ? -EPROBE_DEFER : gpio;
struct gpio_desc *gpio = gpiod_get_index(&pdev->dev, NULL, n,
GPIOD_OUT_LOW);
if (IS_ERR(gpio)) {
r = PTR_ERR(gpio);
goto err;
}
s->gpio[n] = gpio;
n++;
r = gpio_request(gpio, "mdio_mux_gpio");
if (r)
goto err;
r = gpio_direction_output(gpio, 0);
if (r)
goto err;
}
r = mdio_mux_init(&pdev->dev,
@ -98,15 +84,18 @@ static int mdio_mux_gpio_probe(struct platform_device *pdev)
err:
while (n) {
n--;
gpio_free(s->gpio[n]);
gpiod_put(s->gpio[n]);
}
return r;
}
static int mdio_mux_gpio_remove(struct platform_device *pdev)
{
unsigned int n;
struct mdio_mux_gpio_state *s = dev_get_platdata(&pdev->dev);
mdio_mux_uninit(s->mux_handle);
for (n = 0; n < s->num_gpios; n++)
gpiod_put(s->gpio[n]);
return 0;
}