mirror of
https://github.com/u-boot/u-boot.git
synced 2024-12-03 09:33:38 +08:00
5b471dee99
The pmic_spi_free function isn't ever used, and as the frameworks stand today, cannot be, so remove it. Integrate the probe function into pmic_reg as it's not really a "probe" today. Finally, add an err label for the common failure cases. Cc: Lukasz Majewski <l.majewski@samsung.com> Cc: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Stefano Babic <sbabic@denx.de> Signed-off-by: Tom Rini <trini@ti.com> Acked-by: Stefano Babic <sbabic@denx.de>
80 lines
1.4 KiB
C
80 lines
1.4 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#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 -1;
|
|
}
|
|
|
|
if (check_reg(p, reg))
|
|
return -1;
|
|
|
|
if (spi_claim_bus(slave))
|
|
return -1;
|
|
|
|
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 -1;
|
|
}
|
|
|
|
int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
|
|
{
|
|
if (pmic_reg(p, reg, &val, 1))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
|
|
{
|
|
if (pmic_reg(p, reg, val, 0))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|