/*
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* Copyright (C) 2014-2016, Toradex AG
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/*
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* Helpers for Freescale PMIC PF0100
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*/
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#include <common.h>
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#include <i2c.h>
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#include <asm/arch/imx-regs.h>
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#include <asm/arch/iomux.h>
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#include <asm/arch/mx6-pins.h>
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#include <asm/gpio.h>
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#include <asm/mach-imx/iomux-v3.h>
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#include "pf0100_otp.inc"
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#include "pf0100.h"
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/* define for PMIC register dump */
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/*#define DEBUG */
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/* use Apalis GPIO1 to switch on VPGM, ON: 1 */
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static iomux_v3_cfg_t const pmic_prog_pads[] = {
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MX6_PAD_NANDF_D4__GPIO2_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL),
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# define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 4)
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};
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unsigned pmic_init(void)
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{
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unsigned programmed = 0;
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uchar bus = 1;
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uchar devid, revid, val;
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puts("PMIC: ");
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if (!((0 == i2c_set_bus_num(bus)) &&
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(0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
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puts("i2c bus failed\n");
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return 0;
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}
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/* get device ident */
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if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_DEVICEID, 1, &devid, 1) < 0) {
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puts("i2c pmic devid read failed\n");
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return 0;
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}
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if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_REVID, 1, &revid, 1) < 0) {
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puts("i2c pmic revid read failed\n");
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return 0;
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}
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printf("device id: 0x%.2x, revision id: 0x%.2x\n", devid, revid);
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#ifdef DEBUG
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{
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unsigned i, j;
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for (i = 0; i < 16; i++)
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printf("\t%x", i);
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for (j = 0; j < 0x80; ) {
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printf("\n%2x", j);
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for (i = 0; i < 16; i++) {
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i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
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printf("\t%2x", val);
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}
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j += 0x10;
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}
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printf("\nEXT Page 1");
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val = PFUZE100_PAGE_REGISTER_PAGE1;
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if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
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&val, 1)) {
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puts("i2c write failed\n");
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return 0;
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}
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for (j = 0x80; j < 0x100; ) {
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printf("\n%2x", j);
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for (i = 0; i < 16; i++) {
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i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
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printf("\t%2x", val);
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}
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j += 0x10;
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}
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printf("\nEXT Page 2");
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val = PFUZE100_PAGE_REGISTER_PAGE2;
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if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
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&val, 1)) {
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puts("i2c write failed\n");
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return 0;
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}
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for (j = 0x80; j < 0x100; ) {
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printf("\n%2x", j);
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for (i = 0; i < 16; i++) {
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i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
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printf("\t%2x", val);
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}
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j += 0x10;
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}
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printf("\n");
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}
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#endif
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/* get device programmed state */
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val = PFUZE100_PAGE_REGISTER_PAGE1;
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if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1, &val, 1)) {
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puts("i2c write failed\n");
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return 0;
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}
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if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR1, 1, &val, 1) < 0) {
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puts("i2c fuse_por read failed\n");
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return 0;
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}
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if (val & PFUZE100_FUSE_POR_M)
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programmed++;
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if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR2, 1, &val, 1) < 0) {
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puts("i2c fuse_por read failed\n");
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return programmed;
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}
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if (val & PFUZE100_FUSE_POR_M)
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programmed++;
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if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR3, 1, &val, 1) < 0) {
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puts("i2c fuse_por read failed\n");
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return programmed;
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}
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if (val & PFUZE100_FUSE_POR_M)
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programmed++;
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switch (programmed) {
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case 0:
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printf("PMIC: not programmed\n");
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break;
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case 3:
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printf("PMIC: programmed\n");
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break;
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default:
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printf("PMIC: undefined programming state\n");
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break;
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}
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/* The following is needed during production */
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if (programmed != 3) {
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/* set VGEN1 to 1.2V */
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val = PFUZE100_VGEN1_VAL;
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if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_VGEN1CTL, 1,
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&val, 1)) {
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puts("i2c write failed\n");
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return programmed;
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}
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/* set SWBST to 5.0V */
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val = PFUZE100_SWBST_VAL;
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if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_SWBSTCTL, 1,
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&val, 1)) {
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puts("i2c write failed\n");
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}
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}
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return programmed;
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}
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int pf0100_prog(void)
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{
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unsigned char bus = 1;
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unsigned char val;
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unsigned int i;
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if (pmic_init() == 3) {
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puts("PMIC already programmed, exiting\n");
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return CMD_RET_FAILURE;
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}
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/* set up gpio to manipulate vprog, initially off */
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imx_iomux_v3_setup_multiple_pads(pmic_prog_pads,
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ARRAY_SIZE(pmic_prog_pads));
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gpio_direction_output(PMIC_PROG_VOLTAGE, 0);
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if (!((0 == i2c_set_bus_num(bus)) &&
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(0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
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puts("i2c bus failed\n");
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return CMD_RET_FAILURE;
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}
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for (i = 0; i < ARRAY_SIZE(pmic_otp_prog); i++) {
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switch (pmic_otp_prog[i].cmd) {
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case pmic_i2c:
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val = (unsigned char) (pmic_otp_prog[i].value & 0xff);
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if (i2c_write(PFUZE100_I2C_ADDR, pmic_otp_prog[i].reg,
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1, &val, 1)) {
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printf("i2c write failed, reg 0x%2x, value 0x%2x\n",
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pmic_otp_prog[i].reg, val);
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return CMD_RET_FAILURE;
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}
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break;
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case pmic_delay:
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udelay(pmic_otp_prog[i].value * 1000);
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break;
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case pmic_vpgm:
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gpio_direction_output(PMIC_PROG_VOLTAGE,
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pmic_otp_prog[i].value);
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break;
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case pmic_pwr:
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/* TODO */
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break;
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}
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}
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return CMD_RET_SUCCESS;
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}
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int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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int ret;
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puts("Programming PMIC OTP...");
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ret = pf0100_prog();
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if (ret == CMD_RET_SUCCESS)
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puts("done.\n");
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else
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puts("failed.\n");
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return ret;
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}
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U_BOOT_CMD(
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pf0100_otp_prog, 1, 0, do_pf0100_prog,
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"Program the OTP fuses on the PMIC PF0100",
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""
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);
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