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regulator: pfuze100: add support to en-/disable switch regulators 

Add enable/disable support for switch regulators on pfuze100.

Based on commit 5fe156f1ca ("regulator: pfuze100: add enable/disable for
switch") which is reverted due to boot regressions by commit 464a5686e6
("regulator: Revert "regulator: pfuze100: add enable/disable for switch"").
Disabling the switch regulators will only be done if the user specifies
"fsl,pfuze-support-disable-sw" in its device tree to keep backward
compatibility with current dtb's [1].

[1] https://patchwork.kernel.org/patch/10490381/

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Marco Felsch 2018-07-23 09:47:47 +02:00 committed by Mark Brown
parent 78170811a2
commit 9d2fd4f0dd
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 36 additions and 0 deletions
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36
drivers/regulator/pfuze100-regulator.c
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@ -17,6 +17,8 @@
#include <linux/slab.h>
#include <linux/regmap.h>
#define PFUZE_FLAG_DISABLE_SW BIT(1)
#define PFUZE_NUMREGS 128
#define PFUZE100_VOL_OFFSET 0
#define PFUZE100_STANDBY_OFFSET 1
@ -50,10 +52,12 @@ struct pfuze_regulator {
struct regulator_desc desc;
unsigned char stby_reg;
unsigned char stby_mask;
bool sw_reg;
};
struct pfuze_chip {
int chip_id;
int flags;
struct regmap *regmap;
struct device *dev;
struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
@ -170,6 +174,17 @@ static const struct regulator_ops pfuze100_sw_regulator_ops = {
.set_ramp_delay = pfuze100_set_ramp_delay,
};
static const struct regulator_ops pfuze100_sw_disable_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_voltage_time_sel = regulator_set_voltage_time_sel,
.set_ramp_delay = pfuze100_set_ramp_delay,
};
static const struct regulator_ops pfuze100_swb_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
@ -209,9 +224,12 @@ static const struct regulator_ops pfuze100_swb_regulator_ops = {
.uV_step = (step), \
.vsel_reg = (base) + PFUZE100_VOL_OFFSET, \
.vsel_mask = 0x3f, \
.enable_reg = (base) + PFUZE100_MODE_OFFSET, \
.enable_mask = 0xf, \
}, \
.stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \
.stby_mask = 0x3f, \
.sw_reg = true, \
}
#define PFUZE100_SWB_REG(_chip, _name, base, mask, voltages) \
@ -471,6 +489,9 @@ static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
if (!np)
return -EINVAL;
if (of_property_read_bool(np, "fsl,pfuze-support-disable-sw"))
chip->flags |= PFUZE_FLAG_DISABLE_SW;
parent = of_get_child_by_name(np, "regulators");
if (!parent) {
dev_err(dev, "regulators node not found\n");
@ -703,6 +724,21 @@ static int pfuze100_regulator_probe(struct i2c_client *client,
}
}
/*
* Allow SW regulators to turn off. Checking it trough a flag is
* a workaround to keep the backward compatibility with existing
* old dtb's which may relay on the fact that we didn't disable
* the switched regulator till yet.
*/
if (pfuze_chip->flags & PFUZE_FLAG_DISABLE_SW) {
if (pfuze_chip->regulator_descs[i].sw_reg) {
desc->ops = &pfuze100_sw_disable_regulator_ops;
desc->enable_val = 0x8;
desc->disable_val = 0x0;
desc->enable_time = 500;
}
}
config.dev = &client->dev;
config.init_data = init_data;
config.driver_data = pfuze_chip;