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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * 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.
- */
- #include <common.h>
- #include <linux/types.h>
- #include <power/pmic.h>
- #include <spi.h>
- static struct spi_slave *slave;
- static u32 pmic_reg(struct pmic *p, u32 reg, u32 *val, u32 write)
- {
- u32 pmic_tx, pmic_rx;
- u32 tmp;
- if (!slave) {
- slave = spi_setup_slave(p->bus, p->hw.spi.cs, p->hw.spi.clk,
- p->hw.spi.mode);
- if (!slave)
- return -ENODEV;
- }
- if (check_reg(p, reg))
- return -EINVAL;
- if (spi_claim_bus(slave))
- return -EBUSY;
- pmic_tx = p->hw.spi.prepare_tx(reg, val, write);
- tmp = cpu_to_be32(pmic_tx);
- if (spi_xfer(slave, pmic_spi_bitlen, &tmp, &pmic_rx,
- pmic_spi_flags))
- goto err;
- if (write) {
- pmic_tx = p->hw.spi.prepare_tx(reg, val, 0);
- tmp = cpu_to_be32(pmic_tx);
- if (spi_xfer(slave, pmic_spi_bitlen, &tmp, &pmic_rx,
- pmic_spi_flags))
- goto err;
- }
- spi_release_bus(slave);
- *val = cpu_to_be32(pmic_rx);
- return 0;
- err:
- spi_release_bus(slave);
- return -ENOTSUPP;
- }
- int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
- {
- return pmic_reg(p, reg, &val, 1);
- }
- int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
- {
- return pmic_reg(p, reg, val, 0);
- }
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