RK 方案u-boot阶段添加驱动

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驱动部分：
u-boot/drivers/video/drm/gpio_init.c

/** (C) Copyright 2008-2017 Fuzhou Rockchip Electronics Co., Ltd** SPDX-License-Identifier:	GPL-2.0+*/#include <config.h>
#include <common.h>
#include <errno.h>
#include <malloc.h>
#include <video.h>
#include <backlight.h>
#include <asm/gpio.h>
#include <dm/device.h>
#include <dm/read.h>
#include <dm/uclass.h>
#include <dm/uclass-id.h>
#include <linux/media-bus-format.h>
#include <power/regulator.h>
//DECLARE_GLOBAL_DATA_PTR;
struct customer_gpio_priv {struct udevice *reg;struct gpio_desc wifi_power_gpio;struct gpio_desc usb_switch_gpio;struct gpio_desc usb_switch_gpio2;struct gpio_desc wifi_power_gpio_01;struct gpio_desc power_led_ctrl;uint default_level;uint min_level;uint max_level;
};
static int customer_gpio_ofdata_to_platdata(struct udevice *dev)
{printf("##fan##%s\n",__func__);	return 0;
}static int customer_gpio_probe(struct udevice *dev)
{int ret;
//	struct gpio_desc reset_gpio;struct customer_gpio_priv *priv = dev_get_priv(dev);ret = gpio_request_by_name(dev, "usb-switch2", 0,&priv->usb_switch_gpio2, GPIOD_IS_OUT);if (ret && ret != -ENOENT) {printf("%s: Cannot get usb-switch2: %d\n", __func__, ret);return ret;}printf("####set gpio switch gpio2 low\n");dm_gpio_set_value(&priv->usb_switch_gpio2, 0);ret = gpio_request_by_name(dev, "wifi-gpios", 0,&priv->wifi_power_gpio, GPIOD_IS_OUT);if (ret && ret != -ENOENT) {printf("%s: Cannot get wifi GPIO: %d\n", __func__, ret);return ret;}ret = gpio_request_by_name(dev, "usb-switch", 0,&priv->usb_switch_gpio, GPIOD_IS_OUT);if (ret && ret != -ENOENT) {printf("%s: Cannot get usb-switch11: %d\n", __func__, ret);return ret;}ret = gpio_request_by_name(dev, "power-led-ctl", 0,&priv->power_led_ctrl, GPIOD_IS_OUT);if (ret && ret != -ENOENT) {printf("%s: Cannot get power led ctrl  GPIO: %d\n", __func__, ret);return ret;}dm_gpio_set_value(&priv->usb_switch_gpio, 0);printf("%s:  usb-switch---0h:\n", __func__);mdelay(50);dm_gpio_set_value(&priv->usb_switch_gpio, 1);printf("%s:  usb-switch---1h:\n", __func__);dm_gpio_set_value(&priv->wifi_power_gpio, 1);// dm_gpio_set_value(&priv->wifi_power_gpio_01, 1);mdelay(50);dm_gpio_set_value(&priv->wifi_power_gpio, 0);dm_gpio_set_value(&priv->power_led_ctrl, 1);return 0;
}static const struct udevice_id customer_gpio_ids[] = {//{ .compatible = "mmc-pwrseq-simple"},{ .compatible = "customer-gpio-init", },{}
};U_BOOT_DRIVER(customer_gpio) = {.name = "customer_gpio",.id = UCLASS_CUSTOMER_GPIO,  // 跟下面定义对应.of_match = customer_gpio_ids,.ofdata_to_platdata = customer_gpio_ofdata_to_platdata,.probe = customer_gpio_probe,.priv_auto_alloc_size = sizeof(struct customer_gpio_priv),
//	.platdata_auto_alloc_size = sizeof(struct customer_gpio_priv),
};