Hi!

> Use the gpiod interface instead of the deprecated old non-descriptor
> interface in olpc_dcon_xo_1.c.
> 
> Signed-off-by: Nishad Kamdar <nishadkam...@gmail.com>

You may want to cc: lkund...@v3.sk, he was doing great work on OLPC
lately...

Best regards,
                                                                Pavel

> ---
> Changes in v4:
>  - Move changelog after signed-off line.
> Changes in v3:
>  - Resolve a few compilation errors.
> Changes in v2:
>  - Resolve a few compilation errors.
>  - Add a level of indirection to read and write gpios.
> ---
>  drivers/staging/olpc_dcon/olpc_dcon_xo_1.c | 90 +++++++++++-----------
>  1 file changed, 47 insertions(+), 43 deletions(-)
> 
> diff --git a/drivers/staging/olpc_dcon/olpc_dcon_xo_1.c 
> b/drivers/staging/olpc_dcon/olpc_dcon_xo_1.c
> index ff145d493e1b..80b8d4153414 100644
> --- a/drivers/staging/olpc_dcon/olpc_dcon_xo_1.c
> +++ b/drivers/staging/olpc_dcon/olpc_dcon_xo_1.c
> @@ -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;
> -
> -     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;
> +     int ret, i;
> +     struct dcon_gpio *pin = &gpios_asis[0];
> +
> +     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);

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) 
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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