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u-boot/drivers/power/regulator/lp873x_regulator.c

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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>
2018-05-06 21:58:06 +00:00
// SPDX-License-Identifier: GPL-2.0+
power: regulator: lp873x: Add regulator support The driver provides regulator set/get voltage enable/disable functions for lp873x family of PMICs. Signed-off-by: Keerthy <j-keerthy@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-09-30 04:04:03 +00:00
/*
* (C) Copyright 2016
* Texas Instruments Incorporated, <www.ti.com>
*
* Keerthy <j-keerthy@ti.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/lp873x.h>
static const char lp873x_buck_ctrl[LP873X_BUCK_NUM] = {0x2, 0x4};
static const char lp873x_buck_volt[LP873X_BUCK_NUM] = {0x6, 0x7};
static const char lp873x_ldo_ctrl[LP873X_LDO_NUM] = {0x8, 0x9};
static const char lp873x_ldo_volt[LP873X_LDO_NUM] = {0xA, 0xB};
static int lp873x_buck_enable(struct udevice *dev, int op, bool *enable)
{
int ret;
unsigned int adr;
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
adr = uc_pdata->ctrl_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
ret &= LP873X_BUCK_MODE_MASK;
if (ret)
*enable = true;
else
*enable = false;
return 0;
} else if (op == PMIC_OP_SET) {
if (*enable)
ret |= LP873X_BUCK_MODE_MASK;
else
ret &= ~(LP873X_BUCK_MODE_MASK);
ret = pmic_reg_write(dev->parent, adr, ret);
if (ret)
return ret;
}
return 0;
}
static int lp873x_buck_volt2hex(int uV)
{
if (uV > LP873X_BUCK_VOLT_MAX)
return -EINVAL;
else if (uV > 1400000)
return (uV - 1420000) / 20000 + 0x9E;
else if (uV > 730000)
return (uV - 735000) / 5000 + 0x18;
else if (uV >= 700000)
return (uV - 700000) / 10000 + 0x1;
else
return -EINVAL;
}
static int lp873x_buck_hex2volt(int hex)
{
if (hex > LP873X_BUCK_VOLT_MAX_HEX)
return -EINVAL;
else if (hex > 0x9D)
return 1400000 + (hex - 0x9D) * 20000;
else if (hex > 0x17)
return 730000 + (hex - 0x17) * 5000;
else if (hex >= 0x14)
return 700000 + (hex - 0x14) * 10000;
else
return -EINVAL;
}
static int lp873x_buck_val(struct udevice *dev, int op, int *uV)
{
unsigned int hex, adr;
int ret;
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
if (op == PMIC_OP_GET)
*uV = 0;
adr = uc_pdata->volt_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
ret &= LP873X_BUCK_VOLT_MASK;
ret = lp873x_buck_hex2volt(ret);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
hex = lp873x_buck_volt2hex(*uV);
if (hex < 0)
return hex;
ret &= 0x0;
ret |= hex;
ret = pmic_reg_write(dev->parent, adr, ret);
return ret;
}
static int lp873x_ldo_enable(struct udevice *dev, int op, bool *enable)
{
int ret;
unsigned int adr;
struct dm_regulator_uclass_platdata *uc_pdata;
uc_pdata = dev_get_uclass_platdata(dev);
adr = uc_pdata->ctrl_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
ret &= LP873X_LDO_MODE_MASK;
if (ret)
*enable = true;
else
*enable = false;
return 0;
} else if (op == PMIC_OP_SET) {
if (*enable)
ret |= LP873X_LDO_MODE_MASK;
else
ret &= ~(LP873X_LDO_MODE_MASK);
ret = pmic_reg_write(dev->parent, adr, ret);
if (ret)
return ret;
}
return 0;
}
static int lp873x_ldo_volt2hex(int uV)
{
if (uV > LP873X_LDO_VOLT_MAX)
return -EINVAL;
return (uV - 800000) / 100000;
}
static int lp873x_ldo_hex2volt(int hex)
{
if (hex > LP873X_LDO_VOLT_MAX_HEX)
return -EINVAL;
if (!hex)
return 0;
return (hex * 100000) + 800000;
}
static int lp873x_ldo_val(struct udevice *dev, int op, int *uV)
{
unsigned int hex, adr;
int ret;
struct dm_regulator_uclass_platdata *uc_pdata;
if (op == PMIC_OP_GET)
*uV = 0;
uc_pdata = dev_get_uclass_platdata(dev);
adr = uc_pdata->volt_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
ret &= LP873X_LDO_VOLT_MASK;
ret = lp873x_ldo_hex2volt(ret);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
hex = lp873x_ldo_volt2hex(*uV);
if (hex < 0)
return hex;
ret &= ~LP873X_LDO_VOLT_MASK;
ret |= hex;
if (*uV > 1650000)
ret |= 0x80;
ret = pmic_reg_write(dev->parent, adr, ret);
return ret;
}
static int lp873x_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;
int idx = dev->driver_data;
if (idx >= LP873X_LDO_NUM) {
printf("Wrong ID for regulator\n");
return -1;
}
uc_pdata->ctrl_reg = lp873x_ldo_ctrl[idx];
uc_pdata->volt_reg = lp873x_ldo_volt[idx];
return 0;
}
static int ldo_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = lp873x_ldo_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int ldo_set_value(struct udevice *dev, int uV)
{
return lp873x_ldo_val(dev, PMIC_OP_SET, &uV);
}
power: regulator: lp873x: get_enable should return integer get_enable should be able to return error values. Hence change the return type to integer. Signed-off-by: Keerthy <j-keerthy@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-06-13 04:23:55 +00:00
static int ldo_get_enable(struct udevice *dev)
power: regulator: lp873x: Add regulator support The driver provides regulator set/get voltage enable/disable functions for lp873x family of PMICs. Signed-off-by: Keerthy <j-keerthy@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-09-30 04:04:03 +00:00
{
bool enable = false;
int ret;
ret = lp873x_ldo_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int ldo_set_enable(struct udevice *dev, bool enable)
{
return lp873x_ldo_enable(dev, PMIC_OP_SET, &enable);
}
static int lp873x_buck_probe(struct udevice *dev)
{
struct dm_regulator_uclass_platdata *uc_pdata;
int idx;
uc_pdata = dev_get_uclass_platdata(dev);
uc_pdata->type = REGULATOR_TYPE_BUCK;
idx = dev->driver_data;
if (idx >= LP873X_BUCK_NUM) {
printf("Wrong ID for regulator\n");
return -1;
}
uc_pdata->ctrl_reg = lp873x_buck_ctrl[idx];
uc_pdata->volt_reg = lp873x_buck_volt[idx];
return 0;
}
static int buck_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = lp873x_buck_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int buck_set_value(struct udevice *dev, int uV)
{
return lp873x_buck_val(dev, PMIC_OP_SET, &uV);
}
power: regulator: lp873x: get_enable should return integer get_enable should be able to return error values. Hence change the return type to integer. Signed-off-by: Keerthy <j-keerthy@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-06-13 04:23:55 +00:00
static int buck_get_enable(struct udevice *dev)
power: regulator: lp873x: Add regulator support The driver provides regulator set/get voltage enable/disable functions for lp873x family of PMICs. Signed-off-by: Keerthy <j-keerthy@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-09-30 04:04:03 +00:00
{
bool enable = false;
int ret;
ret = lp873x_buck_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int buck_set_enable(struct udevice *dev, bool enable)
{
return lp873x_buck_enable(dev, PMIC_OP_SET, &enable);
}
static const struct dm_regulator_ops lp873x_ldo_ops = {
.get_value = ldo_get_value,
.set_value = ldo_set_value,
.get_enable = ldo_get_enable,
.set_enable = ldo_set_enable,
};
U_BOOT_DRIVER(lp873x_ldo) = {
.name = LP873X_LDO_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &lp873x_ldo_ops,
.probe = lp873x_ldo_probe,
};
static const struct dm_regulator_ops lp873x_buck_ops = {
.get_value = buck_get_value,
.set_value = buck_set_value,
.get_enable = buck_get_enable,
.set_enable = buck_set_enable,
};
U_BOOT_DRIVER(lp873x_buck) = {
.name = LP873X_BUCK_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &lp873x_buck_ops,
.probe = lp873x_buck_probe,
};
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