Skip to content

Commit 99ea37b

Browse files
M-Vaittinenbroonie
M-Vaittinen
authored and
broonie
committed
regulator: bd70528: Support ROHM BD70528 regulator block
BD70528MWV is an ultra-low Iq general purpose single-chip power management IC for battery-powered portable devices. Add support for controlling 3 bucks and 3 LDOs present in ROHM BD70528. Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> Signed-off-by: Mark Brown <broonie@kernel.org>
1 parent fd805d9 commit 99ea37b

File tree

3 files changed

+302
-0
lines changed

3 files changed

+302
-0
lines changed

‎drivers/regulator/Kconfig‎

Lines changed: 11 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -180,6 +180,17 @@ config REGULATOR_BCM590XX
180180
BCM590xx PMUs. This will enable support for the software
181181
controllable LDO/Switching regulators.
182182

183+
config REGULATOR_BD70528
184+
tristate "ROHM BD70528 Power Regulator"
185+
depends on MFD_ROHM_BD70528
186+
help
187+
This driver supports voltage regulators on ROHM BD70528 PMIC.
188+
This will enable support for the software controllable buck
189+
and LDO regulators.
190+
191+
This driver can also be built as a module. If so, the module
192+
will be called bd70528-regulator.
193+
183194
config REGULATOR_BD718XX
184195
tristate "ROHM BD71837 Power Regulator"
185196
depends on MFD_ROHM_BD718XX

‎drivers/regulator/Makefile‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -27,6 +27,7 @@ obj-$(CONFIG_REGULATOR_AS3711) += as3711-regulator.o
2727
obj-$(CONFIG_REGULATOR_AS3722) += as3722-regulator.o
2828
obj-$(CONFIG_REGULATOR_AXP20X) += axp20x-regulator.o
2929
obj-$(CONFIG_REGULATOR_BCM590XX) += bcm590xx-regulator.o
30+
obj-$(CONFIG_REGULATOR_BD70528) += bd70528-regulator.o
3031
obj-$(CONFIG_REGULATOR_BD718XX) += bd718x7-regulator.o
3132
obj-$(CONFIG_REGULATOR_BD9571MWV) += bd9571mwv-regulator.o
3233
obj-$(CONFIG_REGULATOR_DA903X) += da903x.o

‎drivers/regulator/bd70528-regulator.c‎

Lines changed: 290 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,290 @@
1+
// SPDX-License-Identifier: GPL-2.0
2+
// Copyright (C) 2018 ROHM Semiconductors
3+
// bd70528-regulator.c ROHM BD70528MWV regulator driver
4+
5+
#include <linux/delay.h>
6+
#include <linux/err.h>
7+
#include <linux/gpio.h>
8+
#include <linux/interrupt.h>
9+
#include <linux/kernel.h>
10+
#include <linux/mfd/rohm-bd70528.h>
11+
#include <linux/module.h>
12+
#include <linux/of.h>
13+
#include <linux/platform_device.h>
14+
#include <linux/regmap.h>
15+
#include <linux/regulator/driver.h>
16+
#include <linux/regulator/machine.h>
17+
#include <linux/regulator/of_regulator.h>
18+
#include <linux/slab.h>
19+
20+
#define BUCK_RAMPRATE_250MV 0
21+
#define BUCK_RAMPRATE_125MV 1
22+
#define BUCK_RAMP_MAX 250
23+
24+
static struct regulator_linear_range bd70528_buck1_volts[] = {
25+
REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 600000),
26+
REGULATOR_LINEAR_RANGE(2750000, 0x2, 0xf, 50000),
27+
};
28+
static struct regulator_linear_range bd70528_buck2_volts[] = {
29+
REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 300000),
30+
REGULATOR_LINEAR_RANGE(1550000, 0x2, 0xd, 50000),
31+
REGULATOR_LINEAR_RANGE(3000000, 0xe, 0xf, 300000),
32+
};
33+
static struct regulator_linear_range bd70528_buck3_volts[] = {
34+
REGULATOR_LINEAR_RANGE(800000, 0x00, 0xd, 50000),
35+
REGULATOR_LINEAR_RANGE(1800000, 0xe, 0xf, 0),
36+
};
37+
38+
/* All LDOs have same voltage ranges */
39+
static struct regulator_linear_range bd70528_ldo_volts[] = {
40+
REGULATOR_LINEAR_RANGE(1650000, 0x0, 0x07, 50000),
41+
REGULATOR_LINEAR_RANGE(2100000, 0x8, 0x0f, 100000),
42+
REGULATOR_LINEAR_RANGE(2850000, 0x10, 0x19, 50000),
43+
REGULATOR_LINEAR_RANGE(3300000, 0x19, 0x1f, 0),
44+
};
45+
46+
/* Also both LEDs support same voltages */
47+
static const unsigned int led_volts[] = {
48+
20000, 30000
49+
};
50+
51+
static int bd70528_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
52+
{
53+
if (ramp_delay > 0 && ramp_delay <= BUCK_RAMP_MAX) {
54+
unsigned int ramp_value = BUCK_RAMPRATE_250MV;
55+
56+
if (ramp_delay <= 125)
57+
ramp_value = BUCK_RAMPRATE_125MV;
58+
59+
return regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
60+
BD70528_MASK_BUCK_RAMP,
61+
ramp_value << BD70528_SIFT_BUCK_RAMP);
62+
}
63+
dev_err(&rdev->dev, "%s: ramp_delay: %d not supported\n",
64+
rdev->desc->name, ramp_delay);
65+
return -EINVAL;
66+
}
67+
68+
static int bd70528_led_set_voltage_sel(struct regulator_dev *rdev,
69+
unsigned int sel)
70+
{
71+
int ret;
72+
73+
ret = regulator_is_enabled_regmap(rdev);
74+
if (ret < 0)
75+
return ret;
76+
77+
if (ret == 0)
78+
return regulator_set_voltage_sel_regmap(rdev, sel);
79+
80+
dev_err(&rdev->dev,
81+
"LED voltage change not allowed when led is enabled\n");
82+
83+
return -EBUSY;
84+
}
85+
86+
static struct regulator_ops bd70528_buck_ops = {
87+
.enable = regulator_enable_regmap,
88+
.disable = regulator_disable_regmap,
89+
.is_enabled = regulator_is_enabled_regmap,
90+
.list_voltage = regulator_list_voltage_linear_range,
91+
.set_voltage_sel = regulator_set_voltage_sel_regmap,
92+
.get_voltage_sel = regulator_get_voltage_sel_regmap,
93+
.set_voltage_time_sel = regulator_set_voltage_time_sel,
94+
.set_ramp_delay = bd70528_set_ramp_delay,
95+
};
96+
97+
static struct regulator_ops bd70528_ldo_ops = {
98+
.enable = regulator_enable_regmap,
99+
.disable = regulator_disable_regmap,
100+
.is_enabled = regulator_is_enabled_regmap,
101+
.list_voltage = regulator_list_voltage_linear_range,
102+
.set_voltage_sel = regulator_set_voltage_sel_regmap,
103+
.get_voltage_sel = regulator_get_voltage_sel_regmap,
104+
.set_voltage_time_sel = regulator_set_voltage_time_sel,
105+
.set_ramp_delay = bd70528_set_ramp_delay,
106+
};
107+
108+
static struct regulator_ops bd70528_led_ops = {
109+
.enable = regulator_enable_regmap,
110+
.disable = regulator_disable_regmap,
111+
.is_enabled = regulator_is_enabled_regmap,
112+
.list_voltage = regulator_list_voltage_table,
113+
.set_voltage_sel = bd70528_led_set_voltage_sel,
114+
.get_voltage_sel = regulator_get_voltage_sel_regmap,
115+
};
116+
117+
118+
static struct regulator_desc bd70528_desc[] = {
119+
{
120+
.name = "buck1",
121+
.of_match = of_match_ptr("BUCK1"),
122+
.regulators_node = of_match_ptr("regulators"),
123+
.id = BD70528_BUCK1,
124+
.ops = &bd70528_buck_ops,
125+
.type = REGULATOR_VOLTAGE,
126+
.linear_ranges = bd70528_buck1_volts,
127+
.n_linear_ranges = ARRAY_SIZE(bd70528_buck1_volts),
128+
.n_voltages = BD70528_BUCK_VOLTS,
129+
.enable_reg = BD70528_REG_BUCK1_EN,
130+
.enable_mask = BD70528_MASK_RUN_EN,
131+
.vsel_reg = BD70528_REG_BUCK1_VOLT,
132+
.vsel_mask = BD70528_MASK_BUCK_VOLT,
133+
.owner = THIS_MODULE,
134+
},
135+
{
136+
.name = "buck2",
137+
.of_match = of_match_ptr("BUCK2"),
138+
.regulators_node = of_match_ptr("regulators"),
139+
.id = BD70528_BUCK2,
140+
.ops = &bd70528_buck_ops,
141+
.type = REGULATOR_VOLTAGE,
142+
.linear_ranges = bd70528_buck2_volts,
143+
.n_linear_ranges = ARRAY_SIZE(bd70528_buck2_volts),
144+
.n_voltages = BD70528_BUCK_VOLTS,
145+
.enable_reg = BD70528_REG_BUCK2_EN,
146+
.enable_mask = BD70528_MASK_RUN_EN,
147+
.vsel_reg = BD70528_REG_BUCK2_VOLT,
148+
.vsel_mask = BD70528_MASK_BUCK_VOLT,
149+
.owner = THIS_MODULE,
150+
},
151+
{
152+
.name = "buck3",
153+
.of_match = of_match_ptr("BUCK3"),
154+
.regulators_node = of_match_ptr("regulators"),
155+
.id = BD70528_BUCK3,
156+
.ops = &bd70528_buck_ops,
157+
.type = REGULATOR_VOLTAGE,
158+
.linear_ranges = bd70528_buck3_volts,
159+
.n_linear_ranges = ARRAY_SIZE(bd70528_buck3_volts),
160+
.n_voltages = BD70528_BUCK_VOLTS,
161+
.enable_reg = BD70528_REG_BUCK3_EN,
162+
.enable_mask = BD70528_MASK_RUN_EN,
163+
.vsel_reg = BD70528_REG_BUCK3_VOLT,
164+
.vsel_mask = BD70528_MASK_BUCK_VOLT,
165+
.owner = THIS_MODULE,
166+
},
167+
{
168+
.name = "ldo1",
169+
.of_match = of_match_ptr("LDO1"),
170+
.regulators_node = of_match_ptr("regulators"),
171+
.id = BD70528_LDO1,
172+
.ops = &bd70528_ldo_ops,
173+
.type = REGULATOR_VOLTAGE,
174+
.linear_ranges = bd70528_ldo_volts,
175+
.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
176+
.n_voltages = BD70528_LDO_VOLTS,
177+
.enable_reg = BD70528_REG_LDO1_EN,
178+
.enable_mask = BD70528_MASK_RUN_EN,
179+
.vsel_reg = BD70528_REG_LDO1_VOLT,
180+
.vsel_mask = BD70528_MASK_LDO_VOLT,
181+
.owner = THIS_MODULE,
182+
},
183+
{
184+
.name = "ldo2",
185+
.of_match = of_match_ptr("LDO2"),
186+
.regulators_node = of_match_ptr("regulators"),
187+
.id = BD70528_LDO2,
188+
.ops = &bd70528_ldo_ops,
189+
.type = REGULATOR_VOLTAGE,
190+
.linear_ranges = bd70528_ldo_volts,
191+
.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
192+
.n_voltages = BD70528_LDO_VOLTS,
193+
.enable_reg = BD70528_REG_LDO2_EN,
194+
.enable_mask = BD70528_MASK_RUN_EN,
195+
.vsel_reg = BD70528_REG_LDO2_VOLT,
196+
.vsel_mask = BD70528_MASK_LDO_VOLT,
197+
.owner = THIS_MODULE,
198+
},
199+
{
200+
.name = "ldo3",
201+
.of_match = of_match_ptr("LDO3"),
202+
.regulators_node = of_match_ptr("regulators"),
203+
.id = BD70528_LDO3,
204+
.ops = &bd70528_ldo_ops,
205+
.type = REGULATOR_VOLTAGE,
206+
.linear_ranges = bd70528_ldo_volts,
207+
.n_linear_ranges = ARRAY_SIZE(bd70528_ldo_volts),
208+
.n_voltages = BD70528_LDO_VOLTS,
209+
.enable_reg = BD70528_REG_LDO3_EN,
210+
.enable_mask = BD70528_MASK_RUN_EN,
211+
.vsel_reg = BD70528_REG_LDO3_VOLT,
212+
.vsel_mask = BD70528_MASK_LDO_VOLT,
213+
.owner = THIS_MODULE,
214+
},
215+
{
216+
.name = "ldo_led1",
217+
.of_match = of_match_ptr("LDO_LED1"),
218+
.regulators_node = of_match_ptr("regulators"),
219+
.id = BD70528_LED1,
220+
.ops = &bd70528_led_ops,
221+
.type = REGULATOR_VOLTAGE,
222+
.volt_table = &led_volts[0],
223+
.n_voltages = ARRAY_SIZE(led_volts),
224+
.enable_reg = BD70528_REG_LED_EN,
225+
.enable_mask = BD70528_MASK_LED1_EN,
226+
.vsel_reg = BD70528_REG_LED_VOLT,
227+
.vsel_mask = BD70528_MASK_LED1_VOLT,
228+
.owner = THIS_MODULE,
229+
},
230+
{
231+
.name = "ldo_led2",
232+
.of_match = of_match_ptr("LDO_LED2"),
233+
.regulators_node = of_match_ptr("regulators"),
234+
.id = BD70528_LED2,
235+
.ops = &bd70528_led_ops,
236+
.type = REGULATOR_VOLTAGE,
237+
.volt_table = &led_volts[0],
238+
.n_voltages = ARRAY_SIZE(led_volts),
239+
.enable_reg = BD70528_REG_LED_EN,
240+
.enable_mask = BD70528_MASK_LED2_EN,
241+
.vsel_reg = BD70528_REG_LED_VOLT,
242+
.vsel_mask = BD70528_MASK_LED2_VOLT,
243+
.owner = THIS_MODULE,
244+
},
245+
246+
};
247+
248+
static int bd70528_probe(struct platform_device *pdev)
249+
{
250+
struct bd70528 *bd70528;
251+
int i;
252+
struct regulator_config config = {
253+
.dev = pdev->dev.parent,
254+
};
255+
256+
bd70528 = dev_get_drvdata(pdev->dev.parent);
257+
if (!bd70528) {
258+
dev_err(&pdev->dev, "No MFD driver data\n");
259+
return -EINVAL;
260+
}
261+
262+
config.regmap = bd70528->chip.regmap;
263+
264+
for (i = 0; i < ARRAY_SIZE(bd70528_desc); i++) {
265+
struct regulator_dev *rdev;
266+
267+
rdev = devm_regulator_register(&pdev->dev, &bd70528_desc[i],
268+
&config);
269+
if (IS_ERR(rdev)) {
270+
dev_err(&pdev->dev,
271+
"failed to register %s regulator\n",
272+
bd70528_desc[i].name);
273+
return PTR_ERR(rdev);
274+
}
275+
}
276+
return 0;
277+
}
278+
279+
static struct platform_driver bd70528_regulator = {
280+
.driver = {
281+
.name = "bd70528-pmic"
282+
},
283+
.probe = bd70528_probe,
284+
};
285+
286+
module_platform_driver(bd70528_regulator);
287+
288+
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
289+
MODULE_DESCRIPTION("BD70528 voltage regulator driver");
290+
MODULE_LICENSE("GPL");

0 commit comments

Comments
 (0)