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https://github.com/brain-hackers/u-boot-brain
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c733681507
The PMIC framework has been extended to support multiple instances of the variety of devices responsible for power management. This change allows supporting of e.g. fuel gauge, charger, MUIC (Micro USB Interface Circuit). Power related includes have been moved to ./include/power directory. This is a first of a series of patches - in the future "pmic" will be replaced with "power". Two important issues: 1. The PMIC needs to be initialized just after malloc is configured 2. It uses list to hold information about available PMIC devices Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Cc: Stefano Babic <sbabic@denx.de>
109 lines
2.3 KiB
C
109 lines
2.3 KiB
C
/*
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* Copyright (C) 2011 Samsung Electronics
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* Lukasz Majewski <l.majewski@samsung.com>
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*
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* (C) Copyright 2010
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* Stefano Babic, DENX Software Engineering, sbabic@denx.de
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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 <common.h>
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#include <linux/types.h>
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#include <power/pmic.h>
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#include <spi.h>
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static struct spi_slave *slave;
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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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struct spi_slave *pmic_spi_probe(struct pmic *p)
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{
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return spi_setup_slave(p->bus,
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p->hw.spi.cs,
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p->hw.spi.clk,
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p->hw.spi.mode);
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}
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static u32 pmic_reg(struct pmic *p, 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(p);
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if (!slave)
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return -1;
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}
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if (check_reg(p, reg))
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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 = p->hw.spi.prepare_tx(reg, val, write);
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tmp = cpu_to_be32(pmic_tx);
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if (spi_xfer(slave, pmic_spi_bitlen, &tmp, &pmic_rx,
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pmic_spi_flags)) {
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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 = p->hw.spi.prepare_tx(reg, val, 0);
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tmp = cpu_to_be32(pmic_tx);
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if (spi_xfer(slave, pmic_spi_bitlen, &tmp, &pmic_rx,
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pmic_spi_flags)) {
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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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*val = cpu_to_be32(pmic_rx);
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return 0;
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}
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int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
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{
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if (pmic_reg(p, reg, &val, 1))
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return -1;
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return 0;
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}
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int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
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{
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if (pmic_reg(p, reg, val, 0))
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return -1;
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return 0;
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}
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