2 * Copyright (C) 2011 Samsung Electronics
3 * Lukasz Majewski <l.majewski@samsung.com>
6 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
8 * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
10 * SPDX-License-Identifier: GPL-2.0+
14 #include <linux/types.h>
15 #include <power/pmic.h>
18 static struct spi_slave *slave;
20 void pmic_spi_free(struct spi_slave *slave)
23 spi_free_slave(slave);
26 struct spi_slave *pmic_spi_probe(struct pmic *p)
28 return spi_setup_slave(p->bus,
34 static u32 pmic_reg(struct pmic *p, u32 reg, u32 *val, u32 write)
40 slave = pmic_spi_probe(p);
46 if (check_reg(p, reg))
49 if (spi_claim_bus(slave))
52 pmic_tx = p->hw.spi.prepare_tx(reg, val, write);
54 tmp = cpu_to_be32(pmic_tx);
56 if (spi_xfer(slave, pmic_spi_bitlen, &tmp, &pmic_rx,
58 spi_release_bus(slave);
63 pmic_tx = p->hw.spi.prepare_tx(reg, val, 0);
64 tmp = cpu_to_be32(pmic_tx);
65 if (spi_xfer(slave, pmic_spi_bitlen, &tmp, &pmic_rx,
67 spi_release_bus(slave);
72 spi_release_bus(slave);
73 *val = cpu_to_be32(pmic_rx);
78 int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
80 if (pmic_reg(p, reg, &val, 1))
86 int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
88 if (pmic_reg(p, reg, val, 0))