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staging: olpc_dcon: Convert all uses of old GPIO API to new descriptor API 

This commit eliminate all uses of legacy integer base GPIO API in
olpc_dcon_xo_1_5.c and replace them with new descriptor GPIO API like
those in olpc_dcon_xo_1.c.

Also pull some common code with olpc_dcon_xo_1.c to olpc_dcon.h for code
sharing.

Signed-off-by: Jerry Lin <wahahab11@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jerry Lin 2019-04-18 14:48:55 +08:00 committed by Greg Kroah-Hartman
parent 0f7741bb87
commit 523275a8b3
3 changed files with 58 additions and 10 deletions
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5
drivers/staging/olpc_dcon/olpc_dcon.h
View File

@ -97,6 +97,11 @@ struct dcon_platform_data {
int (*read_status)(u8 *status);
};
struct dcon_gpio {
const char *name;
unsigned long flags;
};
#include <linux/interrupt.h>
irqreturn_t dcon_interrupt(int irq, void *id);

7
drivers/staging/olpc_dcon/olpc_dcon_xo_1.c
View File

@ -26,11 +26,6 @@ enum dcon_gpios {
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 },
@ -39,7 +34,7 @@ static const struct dcon_gpio gpios_asis[] = {
[OLPC_DCON_BLANK] = { .name = "dcon_blank", .flags = GPIOD_ASIS },
};
struct gpio_desc *gpios[5];
static struct gpio_desc *gpios[5];
static int dcon_init_xo_1(struct dcon_priv *dcon)
{

56
drivers/staging/olpc_dcon/olpc_dcon_xo_1_5.c
View File

@ -7,7 +7,9 @@
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/machine.h>
#include <asm/olpc.h>
/* TODO: this eventually belongs in linux/vx855.h */
@ -38,6 +40,33 @@
#define PREFIX "OLPC DCON:"
enum dcon_gpios {
OLPC_DCON_STAT0,
OLPC_DCON_STAT1,
OLPC_DCON_LOAD,
};
struct gpiod_lookup_table gpios_table = {
.dev_id = NULL,
.table = {
GPIO_LOOKUP("VX855 South Bridge", VX855_GPIO(1), "dcon_load",
GPIO_ACTIVE_LOW),
GPIO_LOOKUP("VX855 South Bridge", VX855_GPI(10), "dcon_stat0",
GPIO_ACTIVE_LOW),
GPIO_LOOKUP("VX855 South Bridge", VX855_GPI(11), "dcon_stat1",
GPIO_ACTIVE_LOW),
{ },
},
};
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_LOAD] = { .name = "dcon_load", .flags = GPIOD_ASIS },
};
static struct gpio_desc *gpios[3];
static void dcon_clear_irq(void)
{
/* irq status will appear in PMIO_Rx50[6] (RW1C) on gpio12 */
@ -57,6 +86,25 @@ static int dcon_was_irq(void)
static int dcon_init_xo_1_5(struct dcon_priv *dcon)
{
unsigned int irq;
const struct dcon_gpio *pin = &gpios_asis[0];
int i;
int ret;
/* Add GPIO look up table */
gpios_table.dev_id = dev_name(&dcon->client->dev);
gpiod_add_lookup_table(&gpios_table);
/* Get GPIO descriptor */
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;
}
}
dcon_clear_irq();
@ -131,7 +179,7 @@ static void dcon_wiggle_xo_1_5(void)
static void dcon_set_dconload_xo_1_5(int val)
{
gpio_set_value(VX855_GPIO(1), val);
gpiod_set_value(gpios[OLPC_DCON_LOAD], val);
}
static int dcon_read_status_xo_1_5(u8 *status)
@ -140,8 +188,8 @@ static int dcon_read_status_xo_1_5(u8 *status)
return -1;
/* i believe this is the same as "inb(0x44b) & 3" */
*status = gpio_get_value(VX855_GPI(10));
*status |= gpio_get_value(VX855_GPI(11)) << 1;
*status = gpiod_get_value(gpios[OLPC_DCON_STAT0]);
*status |= gpiod_get_value(gpios[OLPC_DCON_STAT1]) << 1;
dcon_clear_irq();