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/*
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* (C) Copyright 2008-2009 Freescale Semiconductor, Inc. |
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* |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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#include <config.h> |
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#include <common.h> |
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#include <asm/errno.h> |
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#include <linux/types.h> |
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#include <fsl_pmic.h> |
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static int check_param(u32 reg, u32 write) |
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{ |
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if (reg > 63 || write > 1) { |
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printf("<reg num> = %d is invalid. Should be less then 63\n", |
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reg); |
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return -1; |
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} |
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return 0; |
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} |
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#ifdef CONFIG_FSL_PMIC_I2C |
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#include <i2c.h> |
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u32 pmic_reg(u32 reg, u32 val, u32 write) |
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{ |
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unsigned char buf[4] = { 0 }; |
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u32 ret_val = 0; |
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if (check_param(reg, write)) |
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return -1; |
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if (write) { |
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buf[0] = (val >> 16) & 0xff; |
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buf[1] = (val >> 8) & 0xff; |
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buf[2] = (val) & 0xff; |
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if (i2c_write(CONFIG_SYS_FSL_PMIC_I2C_ADDR, reg, 1, buf, 3)) |
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return -1; |
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} else { |
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if (i2c_read(CONFIG_SYS_FSL_PMIC_I2C_ADDR, reg, 1, buf, 3)) |
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return -1; |
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ret_val = buf[0] << 16 | buf[1] << 8 | buf[2]; |
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} |
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return ret_val; |
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} |
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#else /* SPI interface */ |
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#include <spi.h> |
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static struct spi_slave *slave; |
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struct spi_slave *pmic_spi_probe(void) |
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{ |
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return spi_setup_slave(CONFIG_FSL_PMIC_BUS, |
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CONFIG_FSL_PMIC_CS, |
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CONFIG_FSL_PMIC_CLK, |
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CONFIG_FSL_PMIC_MODE); |
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} |
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void pmic_spi_free(struct spi_slave *slave) |
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{ |
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if (slave) |
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spi_free_slave(slave); |
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} |
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u32 pmic_reg(u32 reg, u32 val, u32 write) |
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{ |
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u32 pmic_tx, pmic_rx; |
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u32 tmp; |
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if (!slave) { |
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slave = pmic_spi_probe(); |
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if (!slave) |
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return -1; |
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} |
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if (check_param(reg, write)) |
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return -1; |
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if (spi_claim_bus(slave)) |
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return -1; |
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pmic_tx = (write << 31) | (reg << 25) | (val & 0x00FFFFFF); |
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tmp = cpu_to_be32(pmic_tx); |
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if (spi_xfer(slave, 4 << 3, &tmp, &pmic_rx, |
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SPI_XFER_BEGIN | SPI_XFER_END)) { |
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spi_release_bus(slave); |
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return -1; |
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} |
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if (write) { |
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pmic_tx &= ~(1 << 31); |
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tmp = cpu_to_be32(pmic_tx); |
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if (spi_xfer(slave, 4 << 3, &tmp, &pmic_rx, |
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SPI_XFER_BEGIN | SPI_XFER_END)) { |
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spi_release_bus(slave); |
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return -1; |
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} |
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} |
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spi_release_bus(slave); |
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return cpu_to_be32(pmic_rx); |
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} |
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#endif |
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void pmic_reg_write(u32 reg, u32 value) |
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{ |
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pmic_reg(reg, value, 1); |
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} |
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u32 pmic_reg_read(u32 reg) |
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{ |
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return pmic_reg(reg, 0, 0); |
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} |
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void pmic_show_pmic_info(void) |
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{ |
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u32 rev_id; |
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rev_id = pmic_reg_read(REG_IDENTIFICATION); |
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printf("PMIC ID: 0x%08x [Rev: ", rev_id); |
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switch (rev_id & 0x1F) { |
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case 0x1: |
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puts("1.0"); |
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break; |
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case 0x9: |
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puts("1.1"); |
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break; |
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case 0xA: |
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puts("1.2"); |
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break; |
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case 0x10: |
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puts("2.0"); |
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break; |
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case 0x11: |
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puts("2.1"); |
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break; |
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case 0x18: |
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puts("3.0"); |
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break; |
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case 0x19: |
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puts("3.1"); |
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break; |
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case 0x1A: |
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puts("3.2"); |
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break; |
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case 0x2: |
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puts("3.2A"); |
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break; |
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case 0x1B: |
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puts("3.3"); |
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break; |
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case 0x1D: |
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puts("3.5"); |
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break; |
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default: |
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puts("unknown"); |
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break; |
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} |
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puts("]\n"); |
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} |
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static void pmic_dump(int numregs) |
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{ |
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u32 val; |
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int i; |
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pmic_show_pmic_info(); |
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for (i = 0; i < numregs; i++) { |
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val = pmic_reg_read(i); |
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if (!(i % 8)) |
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printf ("\n0x%02x: ", i); |
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printf("%08x ", val); |
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} |
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puts("\n"); |
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} |
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int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
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{ |
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char *cmd; |
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int nregs; |
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u32 val; |
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/* at least two arguments please */ |
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if (argc < 2) |
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return cmd_usage(cmdtp); |
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cmd = argv[1]; |
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if (strcmp(cmd, "dump") == 0) { |
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if (argc < 3) |
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return cmd_usage(cmdtp); |
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nregs = simple_strtoul(argv[2], NULL, 16); |
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pmic_dump(nregs); |
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return 0; |
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} |
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if (strcmp(cmd, "write") == 0) { |
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if (argc < 4) |
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return cmd_usage(cmdtp); |
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nregs = simple_strtoul(argv[2], NULL, 16); |
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val = simple_strtoul(argv[3], NULL, 16); |
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pmic_reg_write(nregs, val); |
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return 0; |
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} |
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/* No subcommand found */ |
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return 1; |
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} |
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U_BOOT_CMD( |
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pmic, CONFIG_SYS_MAXARGS, 1, do_pmic, |
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"Freescale PMIC (Atlas)", |
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"dump [numregs] - dump registers\n" |
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"pmic write <reg> <value> - write register" |
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); |
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