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https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
232 lines
3.5 KiB
C
232 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2013 Freescale Semiconductor, Inc.
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*/
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/* Power-One ZM7300 DPM */
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#include "zm7300.h"
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#define DPM_WP 0x96
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#define WRP_OPCODE 0x01
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#define WRM_OPCODE 0x02
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#define RRP_OPCODE 0x11
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#define DPM_SUCCESS 0x01
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#define DPM_EXEC_FAIL 0x00
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static const uint16_t hex_to_1_10mv[] = {
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5000,
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5125,
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5250,
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5375,
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5500,
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5625,
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5750,
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5875,
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6000,
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6125,
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6250,
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6375,
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6500,
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6625,
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6750,
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6875,
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7000,
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7125,
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7250,
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7375,
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7500,
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7625,
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7750,
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7875,
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8000,
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8125,
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8250,
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8375,
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8500,
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8625,
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8750,
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8875,
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9000,
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9125,
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9250,
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9375,
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9500, /* 0.95mV */
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9625,
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9750,
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9875,
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10000, /* 1.0V */
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10125,
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10250,
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10375,
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10500,
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10625,
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10750,
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10875,
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11000,
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11125,
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11250,
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11375,
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11500,
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11625,
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11750,
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11875,
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12000,
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12125,
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12250,
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12375,
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0, /* reserved */
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};
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/* Read Data d from Register r of POL p */
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u8 dpm_rrp(uchar r)
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{
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u8 ret[5];
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ret[0] = RRP_OPCODE;
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/* POL is 0 */
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ret[1] = 0;
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ret[2] = r;
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i2c_read(I2C_DPM_ADDR, 0, -3, ret, 2);
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if (ret[1] == DPM_SUCCESS) { /* the DPM returned success as status */
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debug("RRP_OPCODE returned success data is %x\n", ret[0]);
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return ret[0];
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} else {
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return -1;
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}
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}
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/* Write Data d into DPM register r (RAM) */
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int dpm_wrm(u8 r, u8 d)
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{
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u8 ret[5];
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ret[0] = WRM_OPCODE;
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ret[1] = r;
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ret[2] = d;
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i2c_read(I2C_DPM_ADDR, 0, -3, ret, 1);
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if (ret[0] == DPM_SUCCESS) { /* the DPM returned success as status */
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debug("WRM_OPCODE returned success data is %x\n", ret[0]);
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return ret[0];
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} else {
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return -1;
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}
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}
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/* Write Data d into Register r of POL(s) a */
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int dpm_wrp(u8 r, u8 d)
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{
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u8 ret[7];
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ret[0] = WRP_OPCODE;
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/* only POL0 is present */
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ret[1] = 0x01;
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ret[2] = 0x00;
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ret[3] = 0x00;
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ret[4] = 0x00;
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ret[5] = r;
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ret[6] = d;
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i2c_read(I2C_DPM_ADDR, 0, -7, ret, 1);
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if (ret[0] == DPM_SUCCESS) { /* the DPM returned success as status */
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debug("WRP_OPCODE returned success data is %x\n", ret[0]);
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return 0;
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} else {
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return -1;
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}
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}
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/* Uses the DPM command RRP */
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u8 zm_read(uchar reg)
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{
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return dpm_rrp(reg);
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}
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/* ZM_write --
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Steps:
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a. Write data to the register
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b. Read data from register and compare to written value
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c. Return return_code & voltage_read
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*/
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u8 zm_write(u8 reg, u8 data)
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{
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u8 d;
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/* write data to register */
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dpm_wrp(reg, data);
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/* read register and compare to written value */
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d = dpm_rrp(reg);
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if (d != data) {
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printf("zm_write : Comparison register data failed\n");
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return -1;
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}
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return d;
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}
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/* zm_write_out_voltage
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* voltage in 1/10 mV
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*/
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int zm_write_voltage(int voltage)
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{
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u8 reg = 0x7, vid;
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uint16_t voltage_read;
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u8 ret;
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vid = (voltage - 5000) / ZM_STEP;
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ret = zm_write(reg, vid);
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if (ret != -1) {
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voltage_read = hex_to_1_10mv[ret];
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debug("voltage set to %dmV\n", voltage_read/10);
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return voltage_read;
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}
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return -1;
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}
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/* zm_read_out_voltage
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* voltage in 1/10 mV
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*/
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int zm_read_voltage(void)
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{
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u8 reg = 0x7;
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u8 ret;
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int voltage;
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ret = zm_read(reg);
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if (ret != -1) {
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voltage = hex_to_1_10mv[ret];
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debug("Voltage read is %dmV\n", voltage/10);
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return voltage;
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} else {
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return -1;
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}
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}
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int zm_disable_wp()
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{
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u8 new_wp_value;
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/* Disable using Write-Protect register 0x96 */
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new_wp_value = 0x8;
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if ((dpm_wrm(DPM_WP, new_wp_value)) < 0) {
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printf("Disable Write-Protect register failed\n");
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return -1;
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}
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return 0;
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}
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int zm_enable_wp()
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{
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u8 orig_wp_value;
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orig_wp_value = 0x0;
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/* Enable using Write-Protect register 0x96 */
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if ((dpm_wrm(DPM_WP, orig_wp_value)) < 0) {
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printf("Enable Write-Protect register failed\n");
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return -1;
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}
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return 0;
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}
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