mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 00:21:06 +00:00
5d387d0df9
This commit adds emulation of sandbox PMIC device, which includes: - PMIC I2C emulation driver - PMIC I/O driver (UCLASS_PMIC) - PMIC regulator driver (UCLASS_REGULATOR) The sandbox PMIC has 12 significant registers and 4 as padding to 16 bytes, which allows using 'i2c md' command with the default count (16). The sandbox PMIC provides regulators: - 2x BUCK - 2x LDO Each, with adjustable output: - Enable state - Voltage - Current limit (LDO1/BUCK1 only) - Operation mode (different for BUCK and LDO) Each attribute has it's own register, beside the enable state, which depends on operation mode. The header file: sandbox_pmic.h includes PMIC's default register values, which are set on i2c pmic emul driver's probe() method. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Tested on sandbox: Tested-by: Simon Glass <sjg@chromium.org>
355 lines
8.1 KiB
C
355 lines
8.1 KiB
C
/*
|
|
* Copyright (C) 2015 Samsung Electronics
|
|
* Przemyslaw Marczak <p.marczak@samsung.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#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>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#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) {
|
|
error("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, ®_val, 1);
|
|
if (ret) {
|
|
error("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) {
|
|
error("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) {
|
|
error("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, ®_val, 1);
|
|
if (ret) {
|
|
error("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, ®_val, 1);
|
|
if (ret) {
|
|
error("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;
|
|
}
|
|
|
|
error("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) {
|
|
error("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 *)®_val, 1);
|
|
if (ret) {
|
|
error("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 bool 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 bool 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,
|
|
};
|