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u-boot/drivers/power/regulator/sandbox.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

352 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
*/
#include <common.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <i2c.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/sandbox_pmic.h>
#define MODE(_id, _val, _name) [_id] = { \
.id = _id, \
.register_value = _val, \
.name = _name, \
}
#define RANGE(_min, _max, _step) { \
.min = _min, \
.max = _max, \
.step = _step, \
}
/*
* struct output_range - helper structure type to define the range of output
* operating values (current/voltage), limited by the PMIC IC design.
*
* @min - minimum value
* @max - maximum value
* @step - step value
*/
struct output_range {
int min;
int max;
int step;
};
/* BUCK: 1,2 - voltage range */
static struct output_range buck_voltage_range[] = {
RANGE(OUT_BUCK1_UV_MIN, OUT_BUCK1_UV_MAX, OUT_BUCK1_UV_STEP),
RANGE(OUT_BUCK2_UV_MIN, OUT_BUCK2_UV_MAX, OUT_BUCK2_UV_STEP),
};
/* BUCK: 1 - current range */
static struct output_range buck_current_range[] = {
RANGE(OUT_BUCK1_UA_MIN, OUT_BUCK1_UA_MAX, OUT_BUCK1_UA_STEP),
};
/* BUCK operating modes */
static struct dm_regulator_mode sandbox_buck_modes[] = {
MODE(BUCK_OM_OFF, OM2REG(BUCK_OM_OFF), "OFF"),
MODE(BUCK_OM_ON, OM2REG(BUCK_OM_ON), "ON"),
MODE(BUCK_OM_PWM, OM2REG(BUCK_OM_PWM), "PWM"),
};
/* LDO: 1,2 - voltage range */
static struct output_range ldo_voltage_range[] = {
RANGE(OUT_LDO1_UV_MIN, OUT_LDO1_UV_MAX, OUT_LDO1_UV_STEP),
RANGE(OUT_LDO2_UV_MIN, OUT_LDO2_UV_MAX, OUT_LDO2_UV_STEP),
};
/* LDO: 1 - current range */
static struct output_range ldo_current_range[] = {
RANGE(OUT_LDO1_UA_MIN, OUT_LDO1_UA_MAX, OUT_LDO1_UA_STEP),
};
/* LDO operating modes */
static struct dm_regulator_mode sandbox_ldo_modes[] = {
MODE(LDO_OM_OFF, OM2REG(LDO_OM_OFF), "OFF"),
MODE(LDO_OM_ON, OM2REG(LDO_OM_ON), "ON"),
MODE(LDO_OM_SLEEP, OM2REG(LDO_OM_SLEEP), "SLEEP"),
MODE(LDO_OM_STANDBY, OM2REG(LDO_OM_STANDBY), "STANDBY"),
};
int out_get_value(struct udevice *dev, int output_count, int reg_type,
struct output_range *range)
{
uint8_t reg_val;
uint reg;
int ret;
if (dev->driver_data > output_count) {
pr_err("Unknown regulator number: %lu for PMIC %s!",
dev->driver_data, dev->name);
return -EINVAL;
}
reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type;
ret = pmic_read(dev->parent, reg, &reg_val, 1);
if (ret) {
pr_err("PMIC read failed: %d\n", ret);
return ret;
}
ret = REG2VAL(range[dev->driver_data - 1].min,
range[dev->driver_data - 1].step,
reg_val);
return ret;
}
static int out_set_value(struct udevice *dev, int output_count, int reg_type,
struct output_range *range, int value)
{
uint8_t reg_val;
uint reg;
int ret;
int max_value;
if (dev->driver_data > output_count) {
pr_err("Unknown regulator number: %lu for PMIC %s!",
dev->driver_data, dev->name);
return -EINVAL;
}
max_value = range[dev->driver_data - 1].max;
if (value > max_value) {
pr_err("Wrong value for %s: %lu. Max is: %d.",
dev->name, dev->driver_data, max_value);
return -EINVAL;
}
reg_val = VAL2REG(range[dev->driver_data - 1].min,
range[dev->driver_data - 1].step,
value);
reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type;
ret = pmic_write(dev->parent, reg, &reg_val, 1);
if (ret) {
pr_err("PMIC write failed: %d\n", ret);
return ret;
}
return 0;
}
static int out_get_mode(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
uint8_t reg_val;
uint reg;
int ret;
int i;
uc_pdata = dev_get_uclass_platdata(dev);
reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM;
ret = pmic_read(dev->parent, reg, &reg_val, 1);
if (ret) {
pr_err("PMIC read failed: %d\n", ret);
return ret;
}
for (i = 0; i < uc_pdata->mode_count; i++) {
if (reg_val == uc_pdata->mode[i].register_value)
return uc_pdata->mode[i].id;
}
pr_err("Unknown operation mode for %s!", dev->name);
return -EINVAL;
}
static int out_set_mode(struct udevice *dev, int mode)
{
struct dm_regulator_uclass_platdata *uc_pdata;
int reg_val = -1;
uint reg;
int ret;
int i;
uc_pdata = dev_get_uclass_platdata(dev);
if (mode >= uc_pdata->mode_count)
return -EINVAL;
for (i = 0; i < uc_pdata->mode_count; i++) {
if (mode == uc_pdata->mode[i].id) {
reg_val = uc_pdata->mode[i].register_value;
break;
}
}
if (reg_val == -1) {
pr_err("Unknown operation mode for %s!", dev->name);
return -EINVAL;
}
reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM;
ret = pmic_write(dev->parent, reg, (uint8_t *)&reg_val, 1);
if (ret) {
pr_err("PMIC write failed: %d\n", ret);
return ret;
}
return 0;
}
static int buck_get_voltage(struct udevice *dev)
{
return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV,
buck_voltage_range);
}
static int buck_set_voltage(struct udevice *dev, int uV)
{
return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV,
buck_voltage_range, uV);
}
static int buck_get_current(struct udevice *dev)
{
/* BUCK2 - unsupported */
if (dev->driver_data == 2)
return -ENOSYS;
return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA,
buck_current_range);
}
static int buck_set_current(struct udevice *dev, int uA)
{
/* BUCK2 - unsupported */
if (dev->driver_data == 2)
return -ENOSYS;
return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA,
buck_current_range, uA);
}
static int buck_get_enable(struct udevice *dev)
{
if (out_get_mode(dev) == BUCK_OM_OFF)
return false;
return true;
}
static int buck_set_enable(struct udevice *dev, bool enable)
{
return out_set_mode(dev, enable ? BUCK_OM_ON : BUCK_OM_OFF);
}
static int sandbox_buck_probe(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
uc_pdata->type = REGULATOR_TYPE_BUCK;
uc_pdata->mode = sandbox_buck_modes;
uc_pdata->mode_count = ARRAY_SIZE(sandbox_buck_modes);
return 0;
}
static const struct dm_regulator_ops sandbox_buck_ops = {
.get_value = buck_get_voltage,
.set_value = buck_set_voltage,
.get_current = buck_get_current,
.set_current = buck_set_current,
.get_enable = buck_get_enable,
.set_enable = buck_set_enable,
.get_mode = out_get_mode,
.set_mode = out_set_mode,
};
U_BOOT_DRIVER(sandbox_buck) = {
.name = SANDBOX_BUCK_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &sandbox_buck_ops,
.probe = sandbox_buck_probe,
};
static int ldo_get_voltage(struct udevice *dev)
{
return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV,
ldo_voltage_range);
}
static int ldo_set_voltage(struct udevice *dev, int uV)
{
return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV,
ldo_voltage_range, uV);
}
static int ldo_get_current(struct udevice *dev)
{
/* LDO2 - unsupported */
if (dev->driver_data == 2)
return -ENOSYS;
return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA,
ldo_current_range);
}
static int ldo_set_current(struct udevice *dev, int uA)
{
/* LDO2 - unsupported */
if (dev->driver_data == 2)
return -ENOSYS;
return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA,
ldo_current_range, uA);
}
static int ldo_get_enable(struct udevice *dev)
{
if (out_get_mode(dev) == LDO_OM_OFF)
return false;
return true;
}
static int ldo_set_enable(struct udevice *dev, bool enable)
{
return out_set_mode(dev, enable ? LDO_OM_ON : LDO_OM_OFF);
}
static int sandbox_ldo_probe(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
uc_pdata->type = REGULATOR_TYPE_LDO;
uc_pdata->mode = sandbox_ldo_modes;
uc_pdata->mode_count = ARRAY_SIZE(sandbox_ldo_modes);
return 0;
}
static const struct dm_regulator_ops sandbox_ldo_ops = {
.get_value = ldo_get_voltage,
.set_value = ldo_set_voltage,
.get_current = ldo_get_current,
.set_current = ldo_set_current,
.get_enable = ldo_get_enable,
.set_enable = ldo_set_enable,
.get_mode = out_get_mode,
.set_mode = out_set_mode,
};
U_BOOT_DRIVER(sandbox_ldo) = {
.name = SANDBOX_LDO_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &sandbox_ldo_ops,
.probe = sandbox_ldo_probe,
};
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