On Mon, Feb 5, 2018 at 10:47 AM, Ludovic Desroches
[off-list ref] wrote:

Use GPIO descriptors instead of relying on the old method.

Reviewed-by: Andy Shevchenko <redacted>

Though few nitpicks below.

+#include <linux/gpio/consumer.h>

I think you forgot to remove of_gpio.h.

 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>

        struct device_node *display_np;
        struct device_node *timings_np;
        struct display_timings *timings;
-       enum of_gpio_flags flags;
        struct atmel_lcdfb_power_ctrl_gpio *og;
        bool is_gpio_power = false;
        int ret = -ENOENT;
-       int i, gpio;
+       int i;
+       struct gpio_desc *gpiod;

I would rather preserve reversed tree style, i.e. put longer line upper.

+       for (i = 0; i < gpiod_count(dev, "atmel,power-control"); i++) {
+               gpiod = devm_gpiod_get_index_optional(dev,
+                               "atmel,power-control", i, GPIOD_ASIS);
+               if (!gpiod)
                        continue;

What about IS_ERR() case?

                og = devm_kzalloc(dev, sizeof(*og), GFP_KERNEL);
                if (!og)
                        goto put_display_node;

+               og->gpiod = gpiod;
                is_gpio_power = true;

+               ret = gpiod_direction_output(gpiod, gpiod_is_active_low(gpiod));
                if (ret) {

I'm not sure this will be needed if you check IS_ERR() above.

+                       dev_err(dev, "set direction output gpio atmel,power-control[%d] failed\n", i);
                        goto put_display_node;
                }

-- 
With Best Regards,
Andy Shevchenko