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staging: olpc_dcon: olpc_dcon_xo_1.c: Switch to the gpio descriptor interface 

Use the gpiod interface instead of the deprecated old non-descriptor
interface in olpc_dcon_xo_1.c.

Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Nishad Kamdar 2018-11-07 18:18:54 +05:30 committed by Greg Kroah-Hartman
parent 01c5c5614a
commit 2159fb3729
1 changed files with 46 additions and 42 deletions
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88
drivers/staging/olpc_dcon/olpc_dcon_xo_1.c
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@ -11,35 +11,51 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/cs5535.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <asm/olpc.h>
#include "olpc_dcon.h"
enum dcon_gpios {
OLPC_DCON_STAT0,
OLPC_DCON_STAT1,
OLPC_DCON_IRQ,
OLPC_DCON_LOAD,
OLPC_DCON_BLANK,
};
struct dcon_gpio {
const char *name;
unsigned long flags;
};
static const struct dcon_gpio gpios_asis[] = {
[OLPC_DCON_STAT0] = { .name = "dcon_stat0", .flags = GPIOD_ASIS },
[OLPC_DCON_STAT1] = { .name = "dcon_stat1", .flags = GPIOD_ASIS },
[OLPC_DCON_IRQ] = { .name = "dcon_irq", .flags = GPIOD_ASIS },
[OLPC_DCON_LOAD] = { .name = "dcon_load", .flags = GPIOD_ASIS },
[OLPC_DCON_BLANK] = { .name = "dcon_blank", .flags = GPIOD_ASIS },
};
struct gpio_desc *gpios[5];
static int dcon_init_xo_1(struct dcon_priv *dcon)
{
unsigned char lob;
int ret, i;
struct dcon_gpio *pin = &gpios_asis[0];
if (gpio_request(OLPC_GPIO_DCON_STAT0, "OLPC-DCON")) {
pr_err("failed to request STAT0 GPIO\n");
return -EIO;
}
if (gpio_request(OLPC_GPIO_DCON_STAT1, "OLPC-DCON")) {
pr_err("failed to request STAT1 GPIO\n");
goto err_gp_stat1;
}
if (gpio_request(OLPC_GPIO_DCON_IRQ, "OLPC-DCON")) {
pr_err("failed to request IRQ GPIO\n");
goto err_gp_irq;
}
if (gpio_request(OLPC_GPIO_DCON_LOAD, "OLPC-DCON")) {
pr_err("failed to request LOAD GPIO\n");
goto err_gp_load;
}
if (gpio_request(OLPC_GPIO_DCON_BLANK, "OLPC-DCON")) {
pr_err("failed to request BLANK GPIO\n");
goto err_gp_blank;
for (i = 0; i < ARRAY_SIZE(gpios_asis); i++) {
gpios[i] = devm_gpiod_get(&dcon->client->dev, pin[i].name,
pin[i].flags);
if (IS_ERR(gpios[i])) {
ret = PTR_ERR(gpios[i]);
pr_err("failed to request %s GPIO: %d\n", pin[i].name,
ret);
return ret;
}
}
/* Turn off the event enable for GPIO7 just to be safe */
@ -61,12 +77,12 @@ static int dcon_init_xo_1(struct dcon_priv *dcon)
dcon->pending_src = dcon->curr_src;
/* Set the directions for the GPIO pins */
gpio_direction_input(OLPC_GPIO_DCON_STAT0);
gpio_direction_input(OLPC_GPIO_DCON_STAT1);
gpio_direction_input(OLPC_GPIO_DCON_IRQ);
gpio_direction_input(OLPC_GPIO_DCON_BLANK);
gpio_direction_output(OLPC_GPIO_DCON_LOAD,
dcon->curr_src == DCON_SOURCE_CPU);
gpiod_direction_input(gpios[OLPC_DCON_STAT0]);
gpiod_direction_input(gpios[OLPC_DCON_STAT1]);
gpiod_direction_input(gpios[OLPC_DCON_IRQ]);
gpiod_direction_input(gpios[OLPC_DCON_BLANK]);
gpiod_direction_output(gpios[OLPC_DCON_LOAD],
dcon->curr_src == DCON_SOURCE_CPU);
/* Set up the interrupt mappings */
@ -84,7 +100,7 @@ static int dcon_init_xo_1(struct dcon_priv *dcon)
/* Register the interrupt handler */
if (request_irq(DCON_IRQ, &dcon_interrupt, 0, "DCON", dcon)) {
pr_err("failed to request DCON's irq\n");
goto err_req_irq;
return -EIO;
}
/* Clear INV_EN for GPIO7 (DCONIRQ) */
@ -125,18 +141,6 @@ static int dcon_init_xo_1(struct dcon_priv *dcon)
cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_EVENTS_ENABLE);
return 0;
err_req_irq:
gpio_free(OLPC_GPIO_DCON_BLANK);
err_gp_blank:
gpio_free(OLPC_GPIO_DCON_LOAD);
err_gp_load:
gpio_free(OLPC_GPIO_DCON_IRQ);
err_gp_irq:
gpio_free(OLPC_GPIO_DCON_STAT1);
err_gp_stat1:
gpio_free(OLPC_GPIO_DCON_STAT0);
return -EIO;
}
static void dcon_wiggle_xo_1(void)
@ -180,13 +184,13 @@ static void dcon_wiggle_xo_1(void)
static void dcon_set_dconload_1(int val)
{
gpio_set_value(OLPC_GPIO_DCON_LOAD, val);
gpiod_set_value(gpios[OLPC_DCON_LOAD], val);
}
static int dcon_read_status_xo_1(u8 *status)
{
*status = gpio_get_value(OLPC_GPIO_DCON_STAT0);
*status |= gpio_get_value(OLPC_GPIO_DCON_STAT1) << 1;
*status = gpiod_get_value(gpios[OLPC_DCON_STAT0]);
*status |= gpiod_get_value(gpios[OLPC_DCON_STAT1]) << 1;
/* Clear the negative edge status for GPIO7 */
cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_NEGATIVE_EDGE_STS);