u-boot/drivers/power/regulator/lp87565_regulator.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

196 lines
3.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2017
* 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/lp87565.h>
static const char lp87565_buck_ctrl1[LP87565_BUCK_NUM] = {0x2, 0x4, 0x6, 0x8, 0x2, 0x6};
static const char lp87565_buck_vout[LP87565_BUCK_NUM] = {0xA, 0xC, 0xE, 0x10, 0xA, 0xE };
static int lp87565_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 &= LP87565_BUCK_MODE_MASK;
if (ret)
*enable = true;
else
*enable = false;
return 0;
} else if (op == PMIC_OP_SET) {
if (*enable)
ret |= LP87565_BUCK_MODE_MASK;
else
ret &= ~LP87565_BUCK_MODE_MASK;
ret = pmic_reg_write(dev->parent, adr, ret);
if (ret)
return ret;
}
return 0;
}
static int lp87565_buck_volt2val(int uV)
{
if (uV > LP87565_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 >= 500000)
return (uV - 500000) / 10000;
else
return -EINVAL;
}
static int lp87565_buck_val2volt(int val)
{
if (val > LP87565_BUCK_VOLT_MAX_HEX)
return -EINVAL;
else if (val > 0x9D)
return 1400000 + (val - 0x9D) * 20000;
else if (val > 0x17)
return 730000 + (val - 0x17) * 5000;
else if (val >= 0x0)
return 500000 + val * 10000;
else
return -EINVAL;
}
static int lp87565_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 &= LP87565_BUCK_VOLT_MASK;
ret = lp87565_buck_val2volt(ret);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
hex = lp87565_buck_volt2val(*uV);
if (hex < 0)
return hex;
ret &= 0x0;
ret = hex;
ret = pmic_reg_write(dev->parent, adr, ret);
return ret;
}
static int lp87565_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 == 0 || idx == 1 || idx == 2 || idx == 3) {
debug("Single phase regulator\n");
} else if (idx == 23) {
idx = 5;
} else if (idx == 10) {
idx = 4;
} else {
printf("Wrong ID for regulator\n");
return -EINVAL;
}
uc_pdata->ctrl_reg = lp87565_buck_ctrl1[idx];
uc_pdata->volt_reg = lp87565_buck_vout[idx];
return 0;
}
static int buck_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = lp87565_buck_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int buck_set_value(struct udevice *dev, int uV)
{
return lp87565_buck_val(dev, PMIC_OP_SET, &uV);
}
static int buck_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = lp87565_buck_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int buck_set_enable(struct udevice *dev, bool enable)
{
return lp87565_buck_enable(dev, PMIC_OP_SET, &enable);
}
static const struct dm_regulator_ops lp87565_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(lp87565_buck) = {
.name = LP87565_BUCK_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &lp87565_buck_ops,
.probe = lp87565_buck_probe,
};