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u-boot/drivers/power/regulator/s2mps11_regulator.c
Jaehoon Chung 60599ea6cd power: regulator: s2mps11: add a regulator driver for s2mps11 
exynos5422 has the s2mps11 PMIC.
s2mps11 pmic has the 10-BUCK and 38-LDO regulators.
Each IP and devices in exynos5422 can be controlled by each regulators.
This patch is support for s2mps11 regulator driver.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Anand Moon <linux.amoon@gmail.com>
2018-01-24 16:07:19 +09:00

597 lines
11 KiB
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Raw Blame History

/*
* Copyright (C) 2018 Samsung Electronics
* Jaehoon Chung <jh80.chung@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/s2mps11.h>
DECLARE_GLOBAL_DATA_PTR;
#define MODE(_id, _val, _name) { \
.id = _id, \
.register_value = _val, \
.name = _name, \
}
/* BUCK : 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 */
static struct dm_regulator_mode s2mps11_buck_modes[] = {
MODE(OP_OFF, S2MPS11_BUCK_MODE_OFF, "OFF"),
MODE(OP_STANDBY, S2MPS11_BUCK_MODE_STANDBY, "ON/OFF"),
MODE(OP_ON, S2MPS11_BUCK_MODE_STANDBY, "ON"),
};
static struct dm_regulator_mode s2mps11_ldo_modes[] = {
MODE(OP_OFF, S2MPS11_LDO_MODE_OFF, "OFF"),
MODE(OP_STANDBY, S2MPS11_LDO_MODE_STANDBY, "ON/OFF"),
MODE(OP_STANDBY_LPM, S2MPS11_LDO_MODE_STANDBY_LPM, "ON/LPM"),
MODE(OP_ON, S2MPS11_LDO_MODE_ON, "ON"),
};
static const char s2mps11_buck_ctrl[] = {
0xff, 0x25, 0x27, 0x29, 0x2b, 0x2d, 0x33, 0x35, 0x37, 0x39, 0x3b
};
static const char s2mps11_buck_out[] = {
0xff, 0x26, 0x28, 0x2a, 0x2c, 0x2f, 0x34, 0x36, 0x38, 0x3a, 0x3c
};
static int s2mps11_buck_hex2volt(int buck, int hex)
{
unsigned int uV = 0;
if (hex < 0)
goto bad;
switch (buck) {
case 7:
case 8:
case 10:
if (hex > S2MPS11_BUCK7_8_10_VOLT_MAX_HEX)
goto bad;
uV = hex * S2MPS11_BUCK_HSTEP + S2MPS11_BUCK_UV_HMIN;
break;
case 9:
if (hex > S2MPS11_BUCK9_VOLT_MAX_HEX)
goto bad;
uV = hex * S2MPS11_BUCK9_STEP * 2 + S2MPS11_BUCK9_UV_MIN;
break;
default:
if (buck == 5 && hex > S2MPS11_BUCK5_VOLT_MAX_HEX)
goto bad;
else if (buck != 5 && hex > S2MPS11_BUCK_VOLT_MAX_HEX)
goto bad;
uV = hex * S2MPS11_BUCK_LSTEP + S2MPS11_BUCK_UV_MIN;
break;
}
return uV;
bad:
pr_err("Value: %#x is wrong for BUCK%d", hex, buck);
return -EINVAL;
}
static int s2mps11_buck_volt2hex(int buck, int uV)
{
int hex;
switch (buck) {
case 7:
case 8:
case 10:
hex = (uV - S2MPS11_BUCK_UV_HMIN) / S2MPS11_BUCK_HSTEP;
if (hex > S2MPS11_BUCK7_8_10_VOLT_MAX_HEX)
goto bad;
break;
case 9:
hex = (uV - S2MPS11_BUCK9_UV_MIN) / S2MPS11_BUCK9_STEP;
if (hex > S2MPS11_BUCK9_VOLT_MAX_HEX)
goto bad;
break;
default:
hex = (uV - S2MPS11_BUCK_UV_MIN) / S2MPS11_BUCK_LSTEP;
if (buck == 5 && hex > S2MPS11_BUCK5_VOLT_MAX_HEX)
goto bad;
else if (buck != 5 && hex > S2MPS11_BUCK_VOLT_MAX_HEX)
goto bad;
break;
};
if (hex >= 0)
return hex;
bad:
pr_err("Value: %d uV is wrong for BUCK%d", uV, buck);
return -EINVAL;
}
static int s2mps11_buck_val(struct udevice *dev, int op, int *uV)
{
int hex, buck, ret;
u32 mask, addr;
u8 val;
buck = dev->driver_data;
if (buck < 1 || buck > S2MPS11_BUCK_NUM) {
pr_err("Wrong buck number: %d\n", buck);
return -EINVAL;
}
if (op == PMIC_OP_GET)
*uV = 0;
addr = s2mps11_buck_out[buck];
switch (buck) {
case 9:
mask = S2MPS11_BUCK9_VOLT_MASK;
break;
default:
mask = S2MPS11_BUCK_VOLT_MASK;
break;
}
ret = pmic_read(dev->parent, addr, &val, 1);
if (ret)
return ret;
if (op == PMIC_OP_GET) {
val &= mask;
ret = s2mps11_buck_hex2volt(buck, val);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
hex = s2mps11_buck_volt2hex(buck, *uV);
if (hex < 0)
return hex;
val &= ~mask;
val |= hex;
ret = pmic_write(dev->parent, addr, &val, 1);
return ret;
}
static int s2mps11_buck_mode(struct udevice *dev, int op, int *opmode)
{
unsigned int addr, mode;
unsigned char val;
int buck, ret;
buck = dev->driver_data;
if (buck < 1 || buck > S2MPS11_BUCK_NUM) {
pr_err("Wrong buck number: %d\n", buck);
return -EINVAL;
}
addr = s2mps11_buck_ctrl[buck];
ret = pmic_read(dev->parent, addr, &val, 1);
if (ret)
return ret;
if (op == PMIC_OP_GET) {
val &= (S2MPS11_BUCK_MODE_MASK << S2MPS11_BUCK_MODE_SHIFT);
switch (val) {
case S2MPS11_BUCK_MODE_OFF:
*opmode = OP_OFF;
break;
case S2MPS11_BUCK_MODE_STANDBY:
*opmode = OP_STANDBY;
break;
case S2MPS11_BUCK_MODE_ON:
*opmode = OP_ON;
break;
default:
return -EINVAL;
}
return 0;
}
switch (*opmode) {
case OP_OFF:
mode = S2MPS11_BUCK_MODE_OFF;
break;
case OP_STANDBY:
mode = S2MPS11_BUCK_MODE_STANDBY;
break;
case OP_ON:
mode = S2MPS11_BUCK_MODE_ON;
break;
default:
pr_err("Wrong mode: %d for buck: %d\n", *opmode, buck);
return -EINVAL;
}
val &= ~(S2MPS11_BUCK_MODE_MASK << S2MPS11_BUCK_MODE_SHIFT);
val |= mode;
ret = pmic_write(dev->parent, addr, &val, 1);
return ret;
}
static int s2mps11_buck_enable(struct udevice *dev, int op, bool *enable)
{
int ret, on_off;
if (op == PMIC_OP_GET) {
ret = s2mps11_buck_mode(dev, op, &on_off);
if (ret)
return ret;
switch (on_off) {
case OP_OFF:
*enable = false;
break;
case OP_ON:
*enable = true;
break;
default:
return -EINVAL;
}
} else if (op == PMIC_OP_SET) {
if (*enable)
on_off = OP_ON;
else
on_off = OP_OFF;
ret = s2mps11_buck_mode(dev, op, &on_off);
if (ret)
return ret;
}
return 0;
}
static int buck_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = s2mps11_buck_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int buck_set_value(struct udevice *dev, int uV)
{
return s2mps11_buck_val(dev, PMIC_OP_SET, &uV);
}
static int buck_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = s2mps11_buck_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int buck_set_enable(struct udevice *dev, bool enable)
{
return s2mps11_buck_enable(dev, PMIC_OP_SET, &enable);
}
static int buck_get_mode(struct udevice *dev)
{
int mode;
int ret;
ret = s2mps11_buck_mode(dev, PMIC_OP_GET, &mode);
if (ret)
return ret;
return mode;
}
static int buck_set_mode(struct udevice *dev, int mode)
{
return s2mps11_buck_mode(dev, PMIC_OP_SET, &mode);
}
static int s2mps11_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 = s2mps11_buck_modes;
uc_pdata->mode_count = ARRAY_SIZE(s2mps11_buck_modes);
return 0;
}
static const struct dm_regulator_ops s2mps11_buck_ops = {
.get_value = buck_get_value,
.set_value = buck_set_value,
.get_enable = buck_get_enable,
.set_enable = buck_set_enable,
.get_mode = buck_get_mode,
.set_mode = buck_set_mode,
};
U_BOOT_DRIVER(s2mps11_buck) = {
.name = S2MPS11_BUCK_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &s2mps11_buck_ops,
.probe = s2mps11_buck_probe,
};
static int s2mps11_ldo_hex2volt(int ldo, int hex)
{
unsigned int uV = 0;
if (hex > S2MPS11_LDO_VOLT_MAX_HEX) {
pr_err("Value: %#x is wrong for LDO%d", hex, ldo);
return -EINVAL;
}
switch (ldo) {
case 1:
case 6:
case 11:
case 22:
case 23:
uV = hex * S2MPS11_LDO_STEP + S2MPS11_LDO_UV_MIN;
break;
default:
uV = hex * S2MPS11_LDO_STEP * 2 + S2MPS11_LDO_UV_MIN;
break;
}
return uV;
}
static int s2mps11_ldo_volt2hex(int ldo, int uV)
{
int hex = 0;
switch (ldo) {
case 1:
case 6:
case 11:
case 22:
case 23:
hex = (uV - S2MPS11_LDO_UV_MIN) / S2MPS11_LDO_STEP;
break;
default:
hex = (uV - S2MPS11_LDO_UV_MIN) / (S2MPS11_LDO_STEP * 2);
break;
}
if (hex >= 0 && hex <= S2MPS11_LDO_VOLT_MAX_HEX)
return hex;
pr_err("Value: %d uV is wrong for LDO%d", uV, ldo);
return -EINVAL;
return 0;
}
static int s2mps11_ldo_val(struct udevice *dev, int op, int *uV)
{
unsigned int addr;
unsigned char val;
int hex, ldo, ret;
ldo = dev->driver_data;
if (ldo < 1 || ldo > S2MPS11_LDO_NUM) {
pr_err("Wrong ldo number: %d\n", ldo);
return -EINVAL;
}
addr = S2MPS11_REG_L1CTRL + ldo - 1;
ret = pmic_read(dev->parent, addr, &val, 1);
if (ret)
return ret;
if (op == PMIC_OP_GET) {
*uV = 0;
val &= S2MPS11_LDO_VOLT_MASK;
ret = s2mps11_ldo_hex2volt(ldo, val);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
hex = s2mps11_ldo_volt2hex(ldo, *uV);
if (hex < 0)
return hex;
val &= ~S2MPS11_LDO_VOLT_MASK;
val |= hex;
ret = pmic_write(dev->parent, addr, &val, 1);
return ret;
}
static int s2mps11_ldo_mode(struct udevice *dev, int op, int *opmode)
{
unsigned int addr, mode;
unsigned char val;
int ldo, ret;
ldo = dev->driver_data;
if (ldo < 1 || ldo > S2MPS11_LDO_NUM) {
pr_err("Wrong ldo number: %d\n", ldo);
return -EINVAL;
}
addr = S2MPS11_REG_L1CTRL + ldo - 1;
ret = pmic_read(dev->parent, addr, &val, 1);
if (ret)
return ret;
if (op == PMIC_OP_GET) {
val &= (S2MPS11_LDO_MODE_MASK << S2MPS11_LDO_MODE_SHIFT);
switch (val) {
case S2MPS11_LDO_MODE_OFF:
*opmode = OP_OFF;
break;
case S2MPS11_LDO_MODE_STANDBY:
*opmode = OP_STANDBY;
break;
case S2MPS11_LDO_MODE_STANDBY_LPM:
*opmode = OP_STANDBY_LPM;
break;
case S2MPS11_LDO_MODE_ON:
*opmode = OP_ON;
break;
default:
return -EINVAL;
}
return 0;
}
switch (*opmode) {
case OP_OFF:
mode = S2MPS11_LDO_MODE_OFF;
break;
case OP_STANDBY:
mode = S2MPS11_LDO_MODE_STANDBY;
break;
case OP_STANDBY_LPM:
mode = S2MPS11_LDO_MODE_STANDBY_LPM;
break;
case OP_ON:
mode = S2MPS11_LDO_MODE_ON;
break;
default:
pr_err("Wrong mode: %d for ldo: %d\n", *opmode, ldo);
return -EINVAL;
}
val &= ~(S2MPS11_LDO_MODE_MASK << S2MPS11_LDO_MODE_SHIFT);
val |= mode;
ret = pmic_write(dev->parent, addr, &val, 1);
return ret;
}
static int s2mps11_ldo_enable(struct udevice *dev, int op, bool *enable)
{
int ret, on_off;
if (op == PMIC_OP_GET) {
ret = s2mps11_ldo_mode(dev, op, &on_off);
if (ret)
return ret;
switch (on_off) {
case OP_OFF:
*enable = false;
break;
case OP_ON:
*enable = true;
break;
default:
return -EINVAL;
}
} else if (op == PMIC_OP_SET) {
if (*enable)
on_off = OP_ON;
else
on_off = OP_OFF;
ret = s2mps11_ldo_mode(dev, op, &on_off);
if (ret)
return ret;
}
return 0;
}
static int ldo_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = s2mps11_ldo_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int ldo_set_value(struct udevice *dev, int uV)
{
return s2mps11_ldo_val(dev, PMIC_OP_SET, &uV);
}
static int ldo_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = s2mps11_ldo_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int ldo_set_enable(struct udevice *dev, bool enable)
{
return s2mps11_ldo_enable(dev, PMIC_OP_SET, &enable);
}
static int ldo_get_mode(struct udevice *dev)
{
int mode, ret;
ret = s2mps11_ldo_mode(dev, PMIC_OP_GET, &mode);
if (ret)
return ret;
return mode;
}
static int ldo_set_mode(struct udevice *dev, int mode)
{
return s2mps11_ldo_mode(dev, PMIC_OP_SET, &mode);
}
static int s2mps11_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 = s2mps11_ldo_modes;
uc_pdata->mode_count = ARRAY_SIZE(s2mps11_ldo_modes);
return 0;
}
static const struct dm_regulator_ops s2mps11_ldo_ops = {
.get_value = ldo_get_value,
.set_value = ldo_set_value,
.get_enable = ldo_get_enable,
.set_enable = ldo_set_enable,
.get_mode = ldo_get_mode,
.set_mode = ldo_set_mode,
};
U_BOOT_DRIVER(s2mps11_ldo) = {
.name = S2MPS11_LDO_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &s2mps11_ldo_ops,
.probe = s2mps11_ldo_probe,
};
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