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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) Guangzhou FriendlyARM Computer Tech. Co., Ltd.
- * (http://www.friendlyarm.com)
- */
- #include <config.h>
- #include <common.h>
- #include <i2c.h>
- #include <asm/io.h>
- #include <asm/arch/nexell.h>
- #include <asm/arch/nx_gpio.h>
- /* Board revision list: <PCB3 | PCB2 | PCB1>
- * 0b000 - NanoPi 2
- * 0b001 - NanoPC-T2
- * 0b010 - NanoPi S2
- * 0b011 - Smart4418
- * 0b100 - NanoPi Fire 2A
- * 0b111 - NanoPi M2A
- *
- * Extented revision:
- * 0b001 - Smart4418-SDK
- */
- #define __IO_GRP 2 /* GPIO_C */
- #define __IO_PCB1 26
- #define __IO_PCB2 27
- #define __IO_PCB3 25
- static int pcb_rev = -1;
- static int base_rev;
- static void bd_hwrev_config_gpio(void)
- {
- int gpios[3][2] = {
- { __IO_PCB1, 1 },
- { __IO_PCB2, 1 },
- { __IO_PCB3, 1 },
- };
- int i;
- /* gpio input mode, pull-down */
- for (i = 0; i < 3; i++) {
- nx_gpio_set_pad_function(__IO_GRP, gpios[i][0], gpios[i][1]);
- nx_gpio_set_output_enable(__IO_GRP, gpios[i][0], 0);
- nx_gpio_set_pull_mode(__IO_GRP, gpios[i][0], 0);
- }
- }
- void bd_hwrev_init(void)
- {
- if (pcb_rev >= 0)
- return;
- bd_hwrev_config_gpio();
- pcb_rev = nx_gpio_get_input_value(__IO_GRP, __IO_PCB1);
- pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB2) << 1;
- pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB3) << 2;
- }
- /* Get extended revision for SmartXX18 */
- void bd_base_rev_init(void)
- {
- struct udevice *dev;
- u8 val = 0;
- if (pcb_rev != 0x3)
- return;
- #define PCA9536_I2C_BUS 2
- #define PCA9636_I2C_ADDR 0x41
- if (i2c_get_chip_for_busnum
- (PCA9536_I2C_BUS, PCA9636_I2C_ADDR, 1, &dev))
- return;
- if (!dm_i2c_read(dev, 0, &val, 1))
- base_rev = (val & 0xf);
- }
- /* To override __weak symbols */
- u32 get_board_rev(void)
- {
- return (base_rev << 8) | pcb_rev;
- }
- const char *get_board_name(void)
- {
- bd_hwrev_init();
- switch (pcb_rev) {
- case 0:
- return "NanoPi 2";
- case 1:
- return "NanoPC-T2";
- case 2:
- return "NanoPi S2";
- case 3:
- return "Smart4418";
- case 4:
- return "NanoPi Fire 2A";
- case 7:
- return "NanoPi M2A";
- default:
- return "s5p4418-X";
- }
- }
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