drivers: gpio-uclass: support PMIC GPIO children

UCLASS_PMIC may have GPIO children without exposed fdt node,
in this case if requesting fails, check if uclass is PMIC.

Restrict build for supported devices only to save those precious
bytes on devices with no spare memory.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c
index 7aece85..4234cd9 100644 (file)
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -1143,9 +1143,29 @@ static int gpio_request_tail(int ret, const char *nodename,
                ret = uclass_get_device_by_ofnode(UCLASS_GPIO, args->node,
                                                  &desc->dev);
                if (ret) {
+#if CONFIG_IS_ENABLED(MAX77663_GPIO) || CONFIG_IS_ENABLED(PALMAS_GPIO)
+                       struct udevice *pmic;
+                       ret = uclass_get_device_by_ofnode(UCLASS_PMIC, args->node,
+                                                         &pmic);
+                       if (ret) {
+                               log_debug("%s: PMIC device get failed, err %d\n",
+                                         __func__, ret);
+                               goto err;
+                       }
+
+                       device_foreach_child(desc->dev, pmic) {
+                               if (device_get_uclass_id(desc->dev) == UCLASS_GPIO)
+                                       break;
+                       }
+
+                       /* if loop exits without GPIO device return error */
+                       if (device_get_uclass_id(desc->dev) != UCLASS_GPIO)
+                               goto err;
+#else
                        debug("%s: uclass_get_device_by_ofnode failed\n",
                              __func__);
                        goto err;
+#endif
                }
        }
        ret = gpio_find_and_xlate(desc, args);