mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-28 23:51:33 +00:00
4dbe07f275
If the bd718x7 is required, but PMIC_CHILDREN is disabled, this driver throws a compile error. Fix this by putting the function to bind children into an if-statement checking for PMIC_CHILDREN. Allowing PMIC_CHILDREN to be disabled in SPL saves some space and still permits some read/write functions to access the PMIC in early startup. Signed-off-by: Adam Ford <aford173@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Fabio Estevam <festevam@gmail.com>
112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2018 NXP
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <errno.h>
|
|
#include <dm.h>
|
|
#include <i2c.h>
|
|
#include <log.h>
|
|
#include <asm/global_data.h>
|
|
#include <power/pmic.h>
|
|
#include <power/regulator.h>
|
|
#include <power/bd71837.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static const struct pmic_child_info pmic_children_info[] = {
|
|
/* buck */
|
|
{ .prefix = "b", .driver = BD718XX_REGULATOR_DRIVER},
|
|
/* ldo */
|
|
{ .prefix = "l", .driver = BD718XX_REGULATOR_DRIVER},
|
|
{ },
|
|
};
|
|
|
|
static int bd71837_reg_count(struct udevice *dev)
|
|
{
|
|
return BD718XX_MAX_REGISTER - 1;
|
|
}
|
|
|
|
static int bd71837_write(struct udevice *dev, uint reg, const uint8_t *buff,
|
|
int len)
|
|
{
|
|
if (dm_i2c_write(dev, reg, buff, len)) {
|
|
pr_err("write error to device: %p register: %#x!", dev, reg);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bd71837_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
|
|
{
|
|
if (dm_i2c_read(dev, reg, buff, len)) {
|
|
pr_err("read error from device: %p register: %#x!", dev, reg);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bd71837_bind(struct udevice *dev)
|
|
{
|
|
int children;
|
|
ofnode regulators_node;
|
|
|
|
regulators_node = dev_read_subnode(dev, "regulators");
|
|
if (!ofnode_valid(regulators_node)) {
|
|
debug("%s: %s regulators subnode not found!\n", __func__,
|
|
dev->name);
|
|
return -ENXIO;
|
|
}
|
|
|
|
debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
|
|
|
|
if (CONFIG_IS_ENABLED(PMIC_CHILDREN)) {
|
|
children = pmic_bind_children(dev, regulators_node, pmic_children_info);
|
|
if (!children)
|
|
debug("%s: %s - no child found\n", __func__, dev->name);
|
|
}
|
|
/* Always return success for this device */
|
|
return 0;
|
|
}
|
|
|
|
static int bd718x7_probe(struct udevice *dev)
|
|
{
|
|
int ret;
|
|
uint8_t mask = BD718XX_REGLOCK_PWRSEQ | BD718XX_REGLOCK_VREG;
|
|
|
|
/* Unlock the PMIC regulator control before probing the children */
|
|
ret = pmic_clrsetbits(dev, BD718XX_REGLOCK, mask, 0);
|
|
if (ret) {
|
|
debug("%s: %s Failed to unlock regulator control\n", __func__,
|
|
dev->name);
|
|
return ret;
|
|
}
|
|
debug("%s: '%s' - BD718x7 PMIC registers unlocked\n", __func__,
|
|
dev->name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct dm_pmic_ops bd71837_ops = {
|
|
.reg_count = bd71837_reg_count,
|
|
.read = bd71837_read,
|
|
.write = bd71837_write,
|
|
};
|
|
|
|
static const struct udevice_id bd71837_ids[] = {
|
|
{ .compatible = "rohm,bd71837", .data = ROHM_CHIP_TYPE_BD71837, },
|
|
{ .compatible = "rohm,bd71847", .data = ROHM_CHIP_TYPE_BD71847, },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(pmic_bd71837) = {
|
|
.name = "bd71837 pmic",
|
|
.id = UCLASS_PMIC,
|
|
.of_match = bd71837_ids,
|
|
.bind = bd71837_bind,
|
|
.probe = bd718x7_probe,
|
|
.ops = &bd71837_ops,
|
|
};
|