/* * Copyright (C) 2011 Samsung Electronics * Lukasz Majewski <l.majewski@samsung.com> * * (C) Copyright 2010 * Stefano Babic, DENX Software Engineering, sbabic@denx.de * * (C) Copyright 2008-2009 Freescale Semiconductor, Inc. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #include <linux/types.h> #include <power/pmic.h> #include <i2c.h> #include <compiler.h> int pmic_reg_write(struct pmic *p, u32 reg, u32 val) { unsigned char buf[4] = { 0 }; if (check_reg(p, reg)) return -1; switch (pmic_i2c_tx_num) { case 3: if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) { buf[2] = (cpu_to_le32(val) >> 16) & 0xff; buf[1] = (cpu_to_le32(val) >> 8) & 0xff; buf[0] = cpu_to_le32(val) & 0xff; } else { buf[0] = (cpu_to_le32(val) >> 16) & 0xff; buf[1] = (cpu_to_le32(val) >> 8) & 0xff; buf[2] = cpu_to_le32(val) & 0xff; } break; case 2: if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) { buf[1] = (cpu_to_le32(val) >> 8) & 0xff; buf[0] = cpu_to_le32(val) & 0xff; } else { buf[0] = (cpu_to_le32(val) >> 8) & 0xff; buf[1] = cpu_to_le32(val) & 0xff; } break; case 1: buf[0] = cpu_to_le32(val) & 0xff; break; default: printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num); return -1; } if (i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num)) return -1; return 0; } int pmic_reg_read(struct pmic *p, u32 reg, u32 *val) { unsigned char buf[4] = { 0 }; u32 ret_val = 0; if (check_reg(p, reg)) return -1; if (i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num)) return -1; switch (pmic_i2c_tx_num) { case 3: if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) ret_val = le32_to_cpu(buf[2] << 16 | buf[1] << 8 | buf[0]); else ret_val = le32_to_cpu(buf[0] << 16 | buf[1] << 8 | buf[2]); break; case 2: if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) ret_val = le32_to_cpu(buf[1] << 8 | buf[0]); else ret_val = le32_to_cpu(buf[0] << 8 | buf[1]); break; case 1: ret_val = le32_to_cpu(buf[0]); break; default: printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num); return -1; } memcpy(val, &ret_val, sizeof(ret_val)); return 0; } int pmic_probe(struct pmic *p) { I2C_SET_BUS(p->bus); debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name); if (i2c_probe(pmic_i2c_addr)) { printf("Can't find PMIC:%s\n", p->name); return -1; } return 0; }