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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018
* Lukasz Majewski, DENX Software Engineering, lukma@denx.de
*
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fsl_pmic.h>
#include <i2c.h>
#include <power/pmic.h>
DECLARE_GLOBAL_DATA_PTR;
static int mc34708_reg_count(struct udevice *dev)
{
return PMIC_NUM_OF_REGS;
}
static int mc34708_write(struct udevice *dev, uint reg, const u8 *buff,
int len)
{
u8 buf[3] = { 0 };
int ret;
if (len != MC34708_TRANSFER_SIZE)
return -EINVAL;
/*
* The MC34708 sends data with big endian format, hence we need to
* perform manual byte swap.
*/
buf[0] = buff[2];
buf[1] = buff[1];
buf[2] = buff[0];
ret = dm_i2c_write(dev, reg, buf, len);
if (ret)
printf("write error to device: %p register: %#x!", dev, reg);
return ret;
}
static int mc34708_read(struct udevice *dev, uint reg, u8 *buff, int len)
{
u8 buf[3] = { 0 };
int ret;
if (len != MC34708_TRANSFER_SIZE)
return -EINVAL;
ret = dm_i2c_read(dev, reg, buf, len);
if (ret)
printf("read error from device: %p register: %#x!", dev, reg);
buff[0] = buf[2];
buff[1] = buf[1];
buff[2] = buf[0];
return ret;
}
static int mc34708_probe(struct udevice *dev)
{
struct uc_pmic_priv *priv = dev_get_uclass_priv(dev);
priv->trans_len = MC34708_TRANSFER_SIZE;
/*
* Handle PMIC Errata 37: APS mode not fully functional,
* use explicit PWM or PFM instead
*/
pmic_clrsetbits(dev, MC34708_REG_SW12_OPMODE,
MC34708_SW1AMODE_MASK | MC34708_SW2MODE_MASK,
SW_MODE_PWMPWM | (SW_MODE_PWMPWM << 14u));
pmic_clrsetbits(dev, MC34708_REG_SW345_OPMODE,
MC34708_SW3MODE_MASK | MC34708_SW4AMODE_MASK |
MC34708_SW4BMODE_MASK | MC34708_SW5MODE_MASK,
SW_MODE_PWMPWM | (SW_MODE_PWMPWM << 6u) |
(SW_MODE_PWMPWM << 12u) | (SW_MODE_PWMPWM << 18u));
return 0;
}
static struct dm_pmic_ops mc34708_ops = {
.reg_count = mc34708_reg_count,
.read = mc34708_read,
.write = mc34708_write,
};
static const struct udevice_id mc34708_ids[] = {
{ .compatible = "fsl,mc34708" },
{ }
};
U_BOOT_DRIVER(pmic_mc34708) = {
.name = "mc34708_pmic",
.id = UCLASS_PMIC,
.of_match = mc34708_ids,
.probe = mc34708_probe,
.ops = &mc34708_ops,
};
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