u-boot/board/rockchip/evb_rk3308/evb_rk3308.c
Simon Glass 401d1c4f5d common: Drop asm/global_data.h from common header
Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
2021-02-02 15:33:42 -05:00

45 lines
923 B
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2018 Rockchip Electronics Co., Ltd
*/
#include <common.h>
#include <adc.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
#define KEY_DOWN_MIN_VAL 0
#define KEY_DOWN_MAX_VAL 30
/*
* Two board variants whith adc channel 3 is for board id
* v10: 1024, v11: 512
* v10: adc channel 0 for dnl key
* v11: adc channel 1 for dnl key
*/
int rockchip_dnl_key_pressed(void)
{
unsigned int key_val, id_val;
int key_ch;
if (adc_channel_single_shot("saradc", 3, &id_val)) {
printf("%s read board id failed\n", __func__);
return false;
}
if (abs(id_val - 1024) <= 30)
key_ch = 0;
else
key_ch = 1;
if (adc_channel_single_shot("saradc", key_ch, &key_val)) {
printf("%s read adc key val failed\n", __func__);
return false;
}
if (key_val >= KEY_DOWN_MIN_VAL && key_val <= KEY_DOWN_MAX_VAL)
return true;
else
return false;
}