mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-12 07:14:03 +08:00
7169654ce0
Convert enum->pointer for data in the match tables, so that the hw differences can be stored in pointer and there by simpily the code. Add struct ltc3589_info for hw differences between the devices and replace ltc3589_variant->ltc3589_info for data in the match table. Simplify the probe() by replacing of_device_get_match_data() and ID lookup for retrieving data by i2c_get_match_data(). Drop enum ltc3589_variant and variant from struct ltc3589_info as there are no users. While at it, dropped trailing comma in the terminator entries for ID table. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Link: https://lore.kernel.org/r/20230828162830.97881-1-biju.das.jz@bp.renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
477 lines
13 KiB
C
477 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Linear Technology LTC3589,LTC3589-1 regulator support
|
|
//
|
|
// Copyright (c) 2014 Philipp Zabel <p.zabel@pengutronix.de>, Pengutronix
|
|
|
|
#include <linux/i2c.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/of.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/regulator/of_regulator.h>
|
|
|
|
#define DRIVER_NAME "ltc3589"
|
|
|
|
#define LTC3589_IRQSTAT 0x02
|
|
#define LTC3589_SCR1 0x07
|
|
#define LTC3589_OVEN 0x10
|
|
#define LTC3589_SCR2 0x12
|
|
#define LTC3589_PGSTAT 0x13
|
|
#define LTC3589_VCCR 0x20
|
|
#define LTC3589_CLIRQ 0x21
|
|
#define LTC3589_B1DTV1 0x23
|
|
#define LTC3589_B1DTV2 0x24
|
|
#define LTC3589_VRRCR 0x25
|
|
#define LTC3589_B2DTV1 0x26
|
|
#define LTC3589_B2DTV2 0x27
|
|
#define LTC3589_B3DTV1 0x29
|
|
#define LTC3589_B3DTV2 0x2a
|
|
#define LTC3589_L2DTV1 0x32
|
|
#define LTC3589_L2DTV2 0x33
|
|
|
|
#define LTC3589_IRQSTAT_PGOOD_TIMEOUT BIT(3)
|
|
#define LTC3589_IRQSTAT_UNDERVOLT_WARN BIT(4)
|
|
#define LTC3589_IRQSTAT_UNDERVOLT_FAULT BIT(5)
|
|
#define LTC3589_IRQSTAT_THERMAL_WARN BIT(6)
|
|
#define LTC3589_IRQSTAT_THERMAL_FAULT BIT(7)
|
|
|
|
#define LTC3589_OVEN_SW1 BIT(0)
|
|
#define LTC3589_OVEN_SW2 BIT(1)
|
|
#define LTC3589_OVEN_SW3 BIT(2)
|
|
#define LTC3589_OVEN_BB_OUT BIT(3)
|
|
#define LTC3589_OVEN_LDO2 BIT(4)
|
|
#define LTC3589_OVEN_LDO3 BIT(5)
|
|
#define LTC3589_OVEN_LDO4 BIT(6)
|
|
#define LTC3589_OVEN_SW_CTRL BIT(7)
|
|
|
|
#define LTC3589_VCCR_SW1_GO BIT(0)
|
|
#define LTC3589_VCCR_SW2_GO BIT(2)
|
|
#define LTC3589_VCCR_SW3_GO BIT(4)
|
|
#define LTC3589_VCCR_LDO2_GO BIT(6)
|
|
|
|
#define LTC3589_VRRCR_SW1_RAMP_MASK GENMASK(1, 0)
|
|
#define LTC3589_VRRCR_SW2_RAMP_MASK GENMASK(3, 2)
|
|
#define LTC3589_VRRCR_SW3_RAMP_MASK GENMASK(5, 4)
|
|
#define LTC3589_VRRCR_LDO2_RAMP_MASK GENMASK(7, 6)
|
|
|
|
enum ltc3589_reg {
|
|
LTC3589_SW1,
|
|
LTC3589_SW2,
|
|
LTC3589_SW3,
|
|
LTC3589_BB_OUT,
|
|
LTC3589_LDO1,
|
|
LTC3589_LDO2,
|
|
LTC3589_LDO3,
|
|
LTC3589_LDO4,
|
|
LTC3589_NUM_REGULATORS,
|
|
};
|
|
|
|
struct ltc3589_info {
|
|
const unsigned int *volt_table;
|
|
int fixed_uV;
|
|
};
|
|
|
|
struct ltc3589 {
|
|
struct regmap *regmap;
|
|
struct device *dev;
|
|
struct regulator_desc regulator_descs[LTC3589_NUM_REGULATORS];
|
|
struct regulator_dev *regulators[LTC3589_NUM_REGULATORS];
|
|
};
|
|
|
|
static const int ltc3589_ldo4[] = {
|
|
2800000, 2500000, 1800000, 3300000,
|
|
};
|
|
|
|
static const int ltc3589_12_ldo4[] = {
|
|
1200000, 1800000, 2500000, 3200000,
|
|
};
|
|
|
|
static const unsigned int ltc3589_ramp_table[] = {
|
|
880, 1750, 3500, 7000
|
|
};
|
|
|
|
static int ltc3589_set_suspend_voltage(struct regulator_dev *rdev, int uV)
|
|
{
|
|
struct ltc3589 *ltc3589 = rdev_get_drvdata(rdev);
|
|
int sel;
|
|
|
|
sel = regulator_map_voltage_linear(rdev, uV, uV);
|
|
if (sel < 0)
|
|
return sel;
|
|
|
|
/* DTV2 register follows right after the corresponding DTV1 register */
|
|
return regmap_update_bits(ltc3589->regmap, rdev->desc->vsel_reg + 1,
|
|
rdev->desc->vsel_mask, sel);
|
|
}
|
|
|
|
static int ltc3589_set_suspend_mode(struct regulator_dev *rdev,
|
|
unsigned int mode)
|
|
{
|
|
struct ltc3589 *ltc3589 = rdev_get_drvdata(rdev);
|
|
int mask, bit = 0;
|
|
|
|
/* VCCR reference selects are right next to the VCCR go bits */
|
|
mask = rdev->desc->apply_bit << 1;
|
|
|
|
if (mode == REGULATOR_MODE_STANDBY)
|
|
bit = mask; /* Select DTV2 */
|
|
|
|
mask |= rdev->desc->apply_bit;
|
|
bit |= rdev->desc->apply_bit;
|
|
return regmap_update_bits(ltc3589->regmap, LTC3589_VCCR, mask, bit);
|
|
}
|
|
|
|
/* SW1, SW2, SW3, LDO2 */
|
|
static const struct regulator_ops ltc3589_linear_regulator_ops = {
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.list_voltage = regulator_list_voltage_linear,
|
|
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
.set_ramp_delay = regulator_set_ramp_delay_regmap,
|
|
.set_voltage_time_sel = regulator_set_voltage_time_sel,
|
|
.set_suspend_voltage = ltc3589_set_suspend_voltage,
|
|
.set_suspend_mode = ltc3589_set_suspend_mode,
|
|
};
|
|
|
|
/* BB_OUT, LDO3 */
|
|
static const struct regulator_ops ltc3589_fixed_regulator_ops = {
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
};
|
|
|
|
/* LDO1 */
|
|
static const struct regulator_ops ltc3589_fixed_standby_regulator_ops = {
|
|
};
|
|
|
|
/* LDO4 */
|
|
static const struct regulator_ops ltc3589_table_regulator_ops = {
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.list_voltage = regulator_list_voltage_table,
|
|
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
};
|
|
|
|
static inline unsigned int ltc3589_scale(unsigned int uV, u32 r1, u32 r2)
|
|
{
|
|
uint64_t tmp;
|
|
|
|
if (uV == 0)
|
|
return 0;
|
|
|
|
tmp = (uint64_t)uV * r1;
|
|
do_div(tmp, r2);
|
|
return uV + (unsigned int)tmp;
|
|
}
|
|
|
|
static int ltc3589_of_parse_cb(struct device_node *np,
|
|
const struct regulator_desc *desc,
|
|
struct regulator_config *config)
|
|
{
|
|
struct ltc3589 *ltc3589 = config->driver_data;
|
|
struct regulator_desc *rdesc = <c3589->regulator_descs[desc->id];
|
|
u32 r[2];
|
|
int ret;
|
|
|
|
/* Parse feedback voltage dividers. LDO3 and LDO4 don't have them */
|
|
if (desc->id >= LTC3589_LDO3)
|
|
return 0;
|
|
|
|
ret = of_property_read_u32_array(np, "lltc,fb-voltage-divider", r, 2);
|
|
if (ret) {
|
|
dev_err(ltc3589->dev, "Failed to parse voltage divider: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
if (!r[0] || !r[1])
|
|
return 0;
|
|
|
|
rdesc->min_uV = ltc3589_scale(desc->min_uV, r[0], r[1]);
|
|
rdesc->uV_step = ltc3589_scale(desc->uV_step, r[0], r[1]);
|
|
rdesc->fixed_uV = ltc3589_scale(desc->fixed_uV, r[0], r[1]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define LTC3589_REG(_name, _of_name, _ops, en_bit, dtv1_reg, dtv_mask) \
|
|
[LTC3589_ ## _name] = { \
|
|
.name = #_name, \
|
|
.of_match = of_match_ptr(#_of_name), \
|
|
.regulators_node = of_match_ptr("regulators"), \
|
|
.of_parse_cb = ltc3589_of_parse_cb, \
|
|
.n_voltages = (dtv_mask) + 1, \
|
|
.fixed_uV = (dtv_mask) ? 0 : 800000, \
|
|
.ops = <c3589_ ## _ops ## _regulator_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.id = LTC3589_ ## _name, \
|
|
.owner = THIS_MODULE, \
|
|
.vsel_reg = (dtv1_reg), \
|
|
.vsel_mask = (dtv_mask), \
|
|
.enable_reg = (en_bit) ? LTC3589_OVEN : 0, \
|
|
.enable_mask = (en_bit), \
|
|
}
|
|
|
|
#define LTC3589_LINEAR_REG(_name, _of_name, _dtv1) \
|
|
[LTC3589_ ## _name] = { \
|
|
.name = #_name, \
|
|
.of_match = of_match_ptr(#_of_name), \
|
|
.regulators_node = of_match_ptr("regulators"), \
|
|
.of_parse_cb = ltc3589_of_parse_cb, \
|
|
.n_voltages = 32, \
|
|
.min_uV = 362500, \
|
|
.uV_step = 12500, \
|
|
.ramp_delay = 1750, \
|
|
.ops = <c3589_linear_regulator_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.id = LTC3589_ ## _name, \
|
|
.owner = THIS_MODULE, \
|
|
.vsel_reg = LTC3589_ ## _dtv1, \
|
|
.vsel_mask = 0x1f, \
|
|
.apply_reg = LTC3589_VCCR, \
|
|
.apply_bit = LTC3589_VCCR_ ## _name ## _GO, \
|
|
.enable_reg = LTC3589_OVEN, \
|
|
.enable_mask = (LTC3589_OVEN_ ## _name), \
|
|
.ramp_reg = LTC3589_VRRCR, \
|
|
.ramp_mask = LTC3589_VRRCR_ ## _name ## _RAMP_MASK, \
|
|
.ramp_delay_table = ltc3589_ramp_table, \
|
|
.n_ramp_values = ARRAY_SIZE(ltc3589_ramp_table), \
|
|
}
|
|
|
|
|
|
#define LTC3589_FIXED_REG(_name, _of_name) \
|
|
LTC3589_REG(_name, _of_name, fixed, LTC3589_OVEN_ ## _name, 0, 0)
|
|
|
|
static const struct regulator_desc ltc3589_regulators[] = {
|
|
LTC3589_LINEAR_REG(SW1, sw1, B1DTV1),
|
|
LTC3589_LINEAR_REG(SW2, sw2, B2DTV1),
|
|
LTC3589_LINEAR_REG(SW3, sw3, B3DTV1),
|
|
LTC3589_FIXED_REG(BB_OUT, bb-out),
|
|
LTC3589_REG(LDO1, ldo1, fixed_standby, 0, 0, 0),
|
|
LTC3589_LINEAR_REG(LDO2, ldo2, L2DTV1),
|
|
LTC3589_FIXED_REG(LDO3, ldo3),
|
|
LTC3589_REG(LDO4, ldo4, table, LTC3589_OVEN_LDO4, LTC3589_L2DTV2, 0x60),
|
|
};
|
|
|
|
static bool ltc3589_writeable_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case LTC3589_IRQSTAT:
|
|
case LTC3589_SCR1:
|
|
case LTC3589_OVEN:
|
|
case LTC3589_SCR2:
|
|
case LTC3589_VCCR:
|
|
case LTC3589_CLIRQ:
|
|
case LTC3589_B1DTV1:
|
|
case LTC3589_B1DTV2:
|
|
case LTC3589_VRRCR:
|
|
case LTC3589_B2DTV1:
|
|
case LTC3589_B2DTV2:
|
|
case LTC3589_B3DTV1:
|
|
case LTC3589_B3DTV2:
|
|
case LTC3589_L2DTV1:
|
|
case LTC3589_L2DTV2:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool ltc3589_readable_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case LTC3589_IRQSTAT:
|
|
case LTC3589_SCR1:
|
|
case LTC3589_OVEN:
|
|
case LTC3589_SCR2:
|
|
case LTC3589_PGSTAT:
|
|
case LTC3589_VCCR:
|
|
case LTC3589_B1DTV1:
|
|
case LTC3589_B1DTV2:
|
|
case LTC3589_VRRCR:
|
|
case LTC3589_B2DTV1:
|
|
case LTC3589_B2DTV2:
|
|
case LTC3589_B3DTV1:
|
|
case LTC3589_B3DTV2:
|
|
case LTC3589_L2DTV1:
|
|
case LTC3589_L2DTV2:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool ltc3589_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case LTC3589_IRQSTAT:
|
|
case LTC3589_PGSTAT:
|
|
case LTC3589_VCCR:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static const struct reg_default ltc3589_reg_defaults[] = {
|
|
{ LTC3589_SCR1, 0x00 },
|
|
{ LTC3589_OVEN, 0x00 },
|
|
{ LTC3589_SCR2, 0x00 },
|
|
{ LTC3589_VCCR, 0x00 },
|
|
{ LTC3589_B1DTV1, 0x19 },
|
|
{ LTC3589_B1DTV2, 0x19 },
|
|
{ LTC3589_VRRCR, 0xff },
|
|
{ LTC3589_B2DTV1, 0x19 },
|
|
{ LTC3589_B2DTV2, 0x19 },
|
|
{ LTC3589_B3DTV1, 0x19 },
|
|
{ LTC3589_B3DTV2, 0x19 },
|
|
{ LTC3589_L2DTV1, 0x19 },
|
|
{ LTC3589_L2DTV2, 0x19 },
|
|
};
|
|
|
|
static const struct regmap_config ltc3589_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.writeable_reg = ltc3589_writeable_reg,
|
|
.readable_reg = ltc3589_readable_reg,
|
|
.volatile_reg = ltc3589_volatile_reg,
|
|
.max_register = LTC3589_L2DTV2,
|
|
.reg_defaults = ltc3589_reg_defaults,
|
|
.num_reg_defaults = ARRAY_SIZE(ltc3589_reg_defaults),
|
|
.use_single_read = true,
|
|
.use_single_write = true,
|
|
.cache_type = REGCACHE_MAPLE,
|
|
};
|
|
|
|
static irqreturn_t ltc3589_isr(int irq, void *dev_id)
|
|
{
|
|
struct ltc3589 *ltc3589 = dev_id;
|
|
unsigned int i, irqstat, event;
|
|
|
|
regmap_read(ltc3589->regmap, LTC3589_IRQSTAT, &irqstat);
|
|
|
|
if (irqstat & LTC3589_IRQSTAT_THERMAL_WARN) {
|
|
event = REGULATOR_EVENT_OVER_TEMP;
|
|
for (i = 0; i < LTC3589_NUM_REGULATORS; i++)
|
|
regulator_notifier_call_chain(ltc3589->regulators[i],
|
|
event, NULL);
|
|
}
|
|
|
|
if (irqstat & LTC3589_IRQSTAT_UNDERVOLT_WARN) {
|
|
event = REGULATOR_EVENT_UNDER_VOLTAGE;
|
|
for (i = 0; i < LTC3589_NUM_REGULATORS; i++)
|
|
regulator_notifier_call_chain(ltc3589->regulators[i],
|
|
event, NULL);
|
|
}
|
|
|
|
/* Clear warning condition */
|
|
regmap_write(ltc3589->regmap, LTC3589_CLIRQ, 0);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int ltc3589_probe(struct i2c_client *client)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
const struct ltc3589_info *info;
|
|
struct regulator_desc *descs;
|
|
struct ltc3589 *ltc3589;
|
|
int i, ret;
|
|
|
|
ltc3589 = devm_kzalloc(dev, sizeof(*ltc3589), GFP_KERNEL);
|
|
if (!ltc3589)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, ltc3589);
|
|
info = i2c_get_match_data(client);
|
|
ltc3589->dev = dev;
|
|
|
|
descs = ltc3589->regulator_descs;
|
|
memcpy(descs, ltc3589_regulators, sizeof(ltc3589_regulators));
|
|
descs[LTC3589_LDO3].fixed_uV = info->fixed_uV;
|
|
descs[LTC3589_LDO4].volt_table = info->volt_table;
|
|
|
|
ltc3589->regmap = devm_regmap_init_i2c(client, <c3589_regmap_config);
|
|
if (IS_ERR(ltc3589->regmap)) {
|
|
ret = PTR_ERR(ltc3589->regmap);
|
|
dev_err(dev, "failed to initialize regmap: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < LTC3589_NUM_REGULATORS; i++) {
|
|
struct regulator_desc *desc = <c3589->regulator_descs[i];
|
|
struct regulator_config config = { };
|
|
|
|
config.dev = dev;
|
|
config.driver_data = ltc3589;
|
|
|
|
ltc3589->regulators[i] = devm_regulator_register(dev, desc,
|
|
&config);
|
|
if (IS_ERR(ltc3589->regulators[i])) {
|
|
ret = PTR_ERR(ltc3589->regulators[i]);
|
|
dev_err(dev, "failed to register regulator %s: %d\n",
|
|
desc->name, ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (client->irq) {
|
|
ret = devm_request_threaded_irq(dev, client->irq, NULL,
|
|
ltc3589_isr,
|
|
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
|
|
client->name, ltc3589);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to request IRQ: %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct ltc3589_info ltc3589_info = {
|
|
.fixed_uV = 1800000,
|
|
.volt_table = ltc3589_ldo4,
|
|
};
|
|
|
|
static const struct ltc3589_info ltc3589_12_info = {
|
|
.fixed_uV = 2800000,
|
|
.volt_table = ltc3589_12_ldo4,
|
|
};
|
|
|
|
static const struct i2c_device_id ltc3589_i2c_id[] = {
|
|
{ "ltc3589", (kernel_ulong_t)<c3589_info },
|
|
{ "ltc3589-1", (kernel_ulong_t)<c3589_12_info },
|
|
{ "ltc3589-2", (kernel_ulong_t)<c3589_12_info },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, ltc3589_i2c_id);
|
|
|
|
static const struct of_device_id __maybe_unused ltc3589_of_match[] = {
|
|
{ .compatible = "lltc,ltc3589", .data = <c3589_info },
|
|
{ .compatible = "lltc,ltc3589-1", .data = <c3589_12_info },
|
|
{ .compatible = "lltc,ltc3589-2", .data = <c3589_12_info },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ltc3589_of_match);
|
|
|
|
static struct i2c_driver ltc3589_driver = {
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
|
.of_match_table = of_match_ptr(ltc3589_of_match),
|
|
},
|
|
.probe = ltc3589_probe,
|
|
.id_table = ltc3589_i2c_id,
|
|
};
|
|
module_i2c_driver(ltc3589_driver);
|
|
|
|
MODULE_AUTHOR("Philipp Zabel <p.zabel@pengutronix.de>");
|
|
MODULE_DESCRIPTION("Regulator driver for Linear Technology LTC3589(-1,2)");
|
|
MODULE_LICENSE("GPL v2");
|