mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 23:47:24 +00:00
8a8d24bdf1
Try to maintain some consistency between these variables by using _plat as a suffix for them. Signed-off-by: Simon Glass <sjg@chromium.org>
245 lines
6.1 KiB
C
245 lines
6.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) 2018 Theobroma Systems Design und Consulting GmbH
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <bitfield.h>
|
|
#include <errno.h>
|
|
#include <dm.h>
|
|
#include <fdtdec.h>
|
|
#include <i2c.h>
|
|
#include <log.h>
|
|
#include <asm/gpio.h>
|
|
#include <linux/bitops.h>
|
|
#include <power/fan53555.h>
|
|
#include <power/pmic.h>
|
|
#include <power/regulator.h>
|
|
|
|
/**
|
|
* struct ic_types - definition of fan53555-family devices
|
|
*
|
|
* @die_id: Identifies the DIE_ID (lower nibble of the ID1 register)
|
|
* @die_rev: Identifies the DIE_REV (lower nibble of the ID2 register)
|
|
* @vsel_min: starting voltage (step 0) in uV
|
|
* @vsel_step: increment of the voltage in uV
|
|
*
|
|
* The voltage ramp (i.e. minimum voltage and step) is selected from the
|
|
* combination of 2 nibbles: DIE_ID and DIE_REV.
|
|
*
|
|
* See http://www.onsemi.com/pub/Collateral/FAN53555-D.pdf for details.
|
|
*/
|
|
static const struct {
|
|
unsigned int vendor;
|
|
u8 die_id;
|
|
u8 die_rev;
|
|
bool check_rev;
|
|
u32 vsel_min;
|
|
u32 vsel_step;
|
|
} ic_types[] = {
|
|
/* Option 00 */
|
|
{ FAN53555_VENDOR_FAIRCHILD, 0x0, 0x3, true, 600000, 10000 },
|
|
/* Option 13 */
|
|
{ FAN53555_VENDOR_FAIRCHILD, 0x0, 0xf, true, 800000, 10000 },
|
|
/* Option 23 */
|
|
{ FAN53555_VENDOR_FAIRCHILD, 0x0, 0xc, true, 600000, 12500 },
|
|
/* Option 01 */
|
|
{ FAN53555_VENDOR_FAIRCHILD, 0x1, 0x3, true, 600000, 10000 },
|
|
/* Option 03 */
|
|
{ FAN53555_VENDOR_FAIRCHILD, 0x3, 0x3, true, 600000, 10000 },
|
|
/* Option 04 */
|
|
{ FAN53555_VENDOR_FAIRCHILD, 0x4, 0xf, true, 603000, 12826 },
|
|
/* Option 05 */
|
|
{ FAN53555_VENDOR_FAIRCHILD, 0x5, 0x3, true, 600000, 10000 },
|
|
/* Option 08 */
|
|
{ FAN53555_VENDOR_FAIRCHILD, 0x8, 0x1, true, 600000, 10000 },
|
|
/* Option 08 */
|
|
{ FAN53555_VENDOR_FAIRCHILD, 0x8, 0xf, true, 600000, 10000 },
|
|
/* Option 09 */
|
|
{ FAN53555_VENDOR_FAIRCHILD, 0xc, 0xf, true, 603000, 12826 },
|
|
/* SYL82X */
|
|
{ FAN53555_VENDOR_SILERGY, 0x8, 0x0, false, 712500, 12500 },
|
|
/* SYL83X */
|
|
{ FAN53555_VENDOR_SILERGY, 0x9, 0x0, false, 712500, 12500 },
|
|
};
|
|
|
|
/* I2C-accessible byte-sized registers */
|
|
enum {
|
|
/* Voltage setting */
|
|
FAN53555_VSEL0 = 0x00,
|
|
FAN53555_VSEL1,
|
|
/* Control register */
|
|
FAN53555_CONTROL,
|
|
/* IC Type */
|
|
FAN53555_ID1,
|
|
/* IC mask version */
|
|
FAN53555_ID2,
|
|
/* Monitor register */
|
|
FAN53555_MONITOR,
|
|
};
|
|
|
|
struct fan53555_plat {
|
|
/* Voltage setting register */
|
|
unsigned int vol_reg;
|
|
unsigned int sleep_reg;
|
|
|
|
};
|
|
|
|
struct fan53555_priv {
|
|
/* IC Vendor */
|
|
unsigned int vendor;
|
|
/* IC Type and Rev */
|
|
unsigned int die_id;
|
|
unsigned int die_rev;
|
|
/* Voltage range and step(linear) */
|
|
unsigned int vsel_min;
|
|
unsigned int vsel_step;
|
|
/* Voltage slew rate limiting */
|
|
unsigned int slew_rate;
|
|
/* Sleep voltage cache */
|
|
unsigned int sleep_vol_cache;
|
|
};
|
|
|
|
static int fan53555_regulator_of_to_plat(struct udevice *dev)
|
|
{
|
|
struct fan53555_plat *dev_pdata = dev_get_plat(dev);
|
|
struct dm_regulator_uclass_plat *uc_pdata =
|
|
dev_get_uclass_plat(dev);
|
|
u32 sleep_vsel;
|
|
|
|
/* This is a buck regulator */
|
|
uc_pdata->type = REGULATOR_TYPE_BUCK;
|
|
|
|
sleep_vsel = dev_read_u32_default(dev, "fcs,suspend-voltage-selector",
|
|
FAN53555_VSEL1);
|
|
|
|
/*
|
|
* Depending on the device-tree settings, the 'normal mode'
|
|
* voltage is either controlled by VSEL0 or VSEL1.
|
|
*/
|
|
switch (sleep_vsel) {
|
|
case FAN53555_VSEL0:
|
|
dev_pdata->sleep_reg = FAN53555_VSEL0;
|
|
dev_pdata->vol_reg = FAN53555_VSEL1;
|
|
break;
|
|
case FAN53555_VSEL1:
|
|
dev_pdata->sleep_reg = FAN53555_VSEL1;
|
|
dev_pdata->vol_reg = FAN53555_VSEL0;
|
|
break;
|
|
default:
|
|
pr_err("%s: invalid vsel id %d\n", dev->name, sleep_vsel);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fan53555_regulator_get_value(struct udevice *dev)
|
|
{
|
|
struct fan53555_plat *pdata = dev_get_plat(dev);
|
|
struct fan53555_priv *priv = dev_get_priv(dev);
|
|
int reg;
|
|
int voltage;
|
|
|
|
/* We only support a single voltage selector (i.e. 'normal' mode). */
|
|
reg = pmic_reg_read(dev->parent, pdata->vol_reg);
|
|
if (reg < 0)
|
|
return reg;
|
|
voltage = priv->vsel_min + (reg & 0x3f) * priv->vsel_step;
|
|
|
|
debug("%s: %d uV\n", __func__, voltage);
|
|
return voltage;
|
|
}
|
|
|
|
static int fan53555_regulator_set_value(struct udevice *dev, int uV)
|
|
{
|
|
struct fan53555_plat *pdata = dev_get_plat(dev);
|
|
struct fan53555_priv *priv = dev_get_priv(dev);
|
|
u8 vol;
|
|
|
|
vol = (uV - priv->vsel_min) / priv->vsel_step;
|
|
debug("%s: uV=%d; writing volume %d: %02x\n",
|
|
__func__, uV, pdata->vol_reg, vol);
|
|
|
|
return pmic_clrsetbits(dev->parent, pdata->vol_reg, GENMASK(6, 0), vol);
|
|
}
|
|
|
|
static int fan53555_voltages_setup(struct udevice *dev)
|
|
{
|
|
struct fan53555_priv *priv = dev_get_priv(dev);
|
|
int i;
|
|
|
|
/* Init voltage range and step */
|
|
for (i = 0; i < ARRAY_SIZE(ic_types); ++i) {
|
|
if (ic_types[i].vendor != priv->vendor)
|
|
continue;
|
|
|
|
if (ic_types[i].die_id != priv->die_id)
|
|
continue;
|
|
|
|
if (ic_types[i].check_rev &&
|
|
ic_types[i].die_rev != priv->die_rev)
|
|
continue;
|
|
|
|
priv->vsel_min = ic_types[i].vsel_min;
|
|
priv->vsel_step = ic_types[i].vsel_step;
|
|
|
|
return 0;
|
|
}
|
|
|
|
pr_err("%s: %s: die id %d rev %d not supported!\n",
|
|
dev->name, __func__, priv->die_id, priv->die_rev);
|
|
return -EINVAL;
|
|
}
|
|
|
|
enum {
|
|
DIE_ID_SHIFT = 0,
|
|
DIE_ID_WIDTH = 4,
|
|
DIE_REV_SHIFT = 0,
|
|
DIE_REV_WIDTH = 4,
|
|
};
|
|
|
|
static int fan53555_probe(struct udevice *dev)
|
|
{
|
|
struct fan53555_priv *priv = dev_get_priv(dev);
|
|
int ID1, ID2;
|
|
|
|
debug("%s\n", __func__);
|
|
|
|
/* read chip ID1 and ID2 (two registers, starting at ID1) */
|
|
ID1 = pmic_reg_read(dev->parent, FAN53555_ID1);
|
|
if (ID1 < 0)
|
|
return ID1;
|
|
|
|
ID2 = pmic_reg_read(dev->parent, FAN53555_ID2);
|
|
if (ID2 < 0)
|
|
return ID2;
|
|
|
|
/* extract vendor, die_id and die_rev */
|
|
priv->vendor = dev->driver_data;
|
|
priv->die_id = ID1 & GENMASK(3, 0);
|
|
priv->die_rev = ID2 & GENMASK(3, 0);
|
|
|
|
if (fan53555_voltages_setup(dev) < 0)
|
|
return -ENODATA;
|
|
|
|
debug("%s: FAN53555 option %d rev %d detected\n",
|
|
__func__, priv->die_id, priv->die_rev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_regulator_ops fan53555_regulator_ops = {
|
|
.get_value = fan53555_regulator_get_value,
|
|
.set_value = fan53555_regulator_set_value,
|
|
};
|
|
|
|
U_BOOT_DRIVER(fan53555_regulator) = {
|
|
.name = "fan53555_regulator",
|
|
.id = UCLASS_REGULATOR,
|
|
.ops = &fan53555_regulator_ops,
|
|
.of_to_plat = fan53555_regulator_of_to_plat,
|
|
.plat_auto = sizeof(struct fan53555_plat),
|
|
.priv_auto = sizeof(struct fan53555_priv),
|
|
.probe = fan53555_probe,
|
|
};
|