kvj
/
linux-zen-server
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
linux-zen-server/drivers/regulator/cpcap-regulator.c

566 lines
18 KiB
C
Raw Normal View History

Initial commit
2023-08-30 17:53:23 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* Motorola CPCAP PMIC regulator driver
*
* Based on cpcap-regulator.c from Motorola Linux kernel tree
* Copyright (C) 2009-2011 Motorola, Inc.
*
* Rewritten for mainline kernel to use device tree and regmap
* Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
*/
#include <linux/err.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/motorola-cpcap.h>
/*
* Resource assignment register bits. These seem to control the state
* idle modes adn are used at least for omap4.
*/
/* CPCAP_REG_ASSIGN2 bits - Resource Assignment 2 */
#define CPCAP_BIT_VSDIO_SEL BIT(15)
#define CPCAP_BIT_VDIG_SEL BIT(14)
#define CPCAP_BIT_VCAM_SEL BIT(13)
#define CPCAP_BIT_SW6_SEL BIT(12)
#define CPCAP_BIT_SW5_SEL BIT(11)
#define CPCAP_BIT_SW4_SEL BIT(10)
#define CPCAP_BIT_SW3_SEL BIT(9)
#define CPCAP_BIT_SW2_SEL BIT(8)
#define CPCAP_BIT_SW1_SEL BIT(7)
/* CPCAP_REG_ASSIGN3 bits - Resource Assignment 3 */
#define CPCAP_BIT_VUSBINT2_SEL BIT(15)
#define CPCAP_BIT_VUSBINT1_SEL BIT(14)
#define CPCAP_BIT_VVIB_SEL BIT(13)
#define CPCAP_BIT_VWLAN1_SEL BIT(12)
#define CPCAP_BIT_VRF1_SEL BIT(11)
#define CPCAP_BIT_VHVIO_SEL BIT(10)
#define CPCAP_BIT_VDAC_SEL BIT(9)
#define CPCAP_BIT_VUSB_SEL BIT(8)
#define CPCAP_BIT_VSIM_SEL BIT(7)
#define CPCAP_BIT_VRFREF_SEL BIT(6)
#define CPCAP_BIT_VPLL_SEL BIT(5)
#define CPCAP_BIT_VFUSE_SEL BIT(4)
#define CPCAP_BIT_VCSI_SEL BIT(3)
#define CPCAP_BIT_SPARE_14_2 BIT(2)
#define CPCAP_BIT_VWLAN2_SEL BIT(1)
#define CPCAP_BIT_VRF2_SEL BIT(0)
/* CPCAP_REG_ASSIGN4 bits - Resource Assignment 4 */
#define CPCAP_BIT_VAUDIO_SEL BIT(0)
/*
* Enable register bits. At least CPCAP_BIT_AUDIO_LOW_PWR is generic,
* and not limited to audio regulator. Let's use the Motorola kernel
* naming for now until we have a better understanding of the other
* enable register bits. No idea why BIT(3) is not defined.
*/
#define CPCAP_BIT_AUDIO_LOW_PWR BIT(6)
#define CPCAP_BIT_AUD_LOWPWR_SPEED BIT(5)
#define CPCAP_BIT_VAUDIOPRISTBY BIT(4)
#define CPCAP_BIT_VAUDIO_MODE1 BIT(2)
#define CPCAP_BIT_VAUDIO_MODE0 BIT(1)
#define CPCAP_BIT_V_AUDIO_EN BIT(0)
#define CPCAP_BIT_AUDIO_NORMAL_MODE 0x00
/*
* Off mode configuration bit. Used currently only by SW5 on omap4. There's
* the following comment in Motorola Linux kernel tree for it:
*
* When set in the regulator mode, the regulator assignment will be changed
* to secondary when the regulator is disabled. The mode will be set back to
* primary when the regulator is turned on.
*/
#define CPCAP_REG_OFF_MODE_SEC BIT(15)
/*
* SoC specific configuration for CPCAP regulator. There are at least three
* different SoCs each with their own parameters: omap3, omap4 and tegra2.
*
* The assign_reg and assign_mask seem to allow toggling between primary
* and secondary mode that at least omap4 uses for off mode.
*/
struct cpcap_regulator {
struct regulator_desc rdesc;
const u16 assign_reg;
const u16 assign_mask;
};
#define CPCAP_REG(_ID, reg, assignment_reg, assignment_mask, val_tbl, \
mode_mask, volt_mask, mode_val, off_val, \
volt_trans_time) { \
.rdesc = { \
.name = #_ID, \
.of_match = of_match_ptr(#_ID), \
.ops = &cpcap_regulator_ops, \
.regulators_node = of_match_ptr("regulators"), \
.type = REGULATOR_VOLTAGE, \
.id = CPCAP_##_ID, \
.owner = THIS_MODULE, \
.n_voltages = ARRAY_SIZE(val_tbl), \
.volt_table = (val_tbl), \
.vsel_reg = (reg), \
.vsel_mask = (volt_mask), \
.enable_reg = (reg), \
.enable_mask = (mode_mask), \
.enable_val = (mode_val), \
.disable_val = (off_val), \
.ramp_delay = (volt_trans_time), \
.of_map_mode = cpcap_map_mode, \
}, \
.assign_reg = (assignment_reg), \
.assign_mask = (assignment_mask), \
}
struct cpcap_ddata {
struct regmap *reg;
struct device *dev;
const struct cpcap_regulator *soc;
};
enum cpcap_regulator_id {
CPCAP_SW1,
CPCAP_SW2,
CPCAP_SW3,
CPCAP_SW4,
CPCAP_SW5,
CPCAP_SW6,
CPCAP_VCAM,
CPCAP_VCSI,
CPCAP_VDAC,
CPCAP_VDIG,
CPCAP_VFUSE,
CPCAP_VHVIO,
CPCAP_VSDIO,
CPCAP_VPLL,
CPCAP_VRF1,
CPCAP_VRF2,
CPCAP_VRFREF,
CPCAP_VWLAN1,
CPCAP_VWLAN2,
CPCAP_VSIM,
CPCAP_VSIMCARD,
CPCAP_VVIB,
CPCAP_VUSB,
CPCAP_VAUDIO,
CPCAP_NR_REGULATORS,
};
/*
* We need to also configure regulator idle mode for SoC off mode if
* CPCAP_REG_OFF_MODE_SEC is set.
*/
static int cpcap_regulator_enable(struct regulator_dev *rdev)
{
struct cpcap_regulator *regulator = rdev_get_drvdata(rdev);
int error;
error = regulator_enable_regmap(rdev);
if (error)
return error;
if (rdev->desc->enable_val & CPCAP_REG_OFF_MODE_SEC) {
error = regmap_update_bits(rdev->regmap, regulator->assign_reg,
regulator->assign_mask,
regulator->assign_mask);
if (error)
regulator_disable_regmap(rdev);
}
return error;
}
/*
* We need to also configure regulator idle mode for SoC off mode if
* CPCAP_REG_OFF_MODE_SEC is set.
*/
static int cpcap_regulator_disable(struct regulator_dev *rdev)
{
struct cpcap_regulator *regulator = rdev_get_drvdata(rdev);
int error;
if (rdev->desc->enable_val & CPCAP_REG_OFF_MODE_SEC) {
error = regmap_update_bits(rdev->regmap, regulator->assign_reg,
regulator->assign_mask, 0);
if (error)
return error;
}
error = regulator_disable_regmap(rdev);
if (error && (rdev->desc->enable_val & CPCAP_REG_OFF_MODE_SEC)) {
regmap_update_bits(rdev->regmap, regulator->assign_reg,
regulator->assign_mask,
regulator->assign_mask);
}
return error;
}
static unsigned int cpcap_map_mode(unsigned int mode)
{
switch (mode) {
case CPCAP_BIT_AUDIO_NORMAL_MODE:
return REGULATOR_MODE_NORMAL;
case CPCAP_BIT_AUDIO_LOW_PWR:
return REGULATOR_MODE_STANDBY;
default:
return REGULATOR_MODE_INVALID;
}
}
static unsigned int cpcap_regulator_get_mode(struct regulator_dev *rdev)
{
int value;
regmap_read(rdev->regmap, rdev->desc->enable_reg, &value);
if (value & CPCAP_BIT_AUDIO_LOW_PWR)
return REGULATOR_MODE_STANDBY;
return REGULATOR_MODE_NORMAL;
}
static int cpcap_regulator_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
int value;
switch (mode) {
case REGULATOR_MODE_NORMAL:
value = CPCAP_BIT_AUDIO_NORMAL_MODE;
break;
case REGULATOR_MODE_STANDBY:
value = CPCAP_BIT_AUDIO_LOW_PWR;
break;
default:
return -EINVAL;
}
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
CPCAP_BIT_AUDIO_LOW_PWR, value);
}
static const struct regulator_ops cpcap_regulator_ops = {
.enable = cpcap_regulator_enable,
.disable = cpcap_regulator_disable,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_iterate,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_mode = cpcap_regulator_get_mode,
.set_mode = cpcap_regulator_set_mode,
};
static const unsigned int unknown_val_tbl[] = { 0, };
static const unsigned int sw2_sw4_val_tbl[] = { 612500, 625000, 637500,
650000, 662500, 675000,
687500, 700000, 712500,
725000, 737500, 750000,
762500, 775000, 787500,
800000, 812500, 825000,
837500, 850000, 862500,
875000, 887500, 900000,
912500, 925000, 937500,
950000, 962500, 975000,
987500, 1000000, 1012500,
1025000, 1037500, 1050000,
1062500, 1075000, 1087500,
1100000, 1112500, 1125000,
1137500, 1150000, 1162500,
1175000, 1187500, 1200000,
1212500, 1225000, 1237500,
1250000, 1262500, 1275000,
1287500, 1300000, 1312500,
1325000, 1337500, 1350000,
1362500, 1375000, 1387500,
1400000, 1412500, 1425000,
1437500, 1450000, 1462500, };
static const unsigned int sw5_val_tbl[] = { 0, 5050000, };
static const unsigned int vcam_val_tbl[] = { 2600000, 2700000, 2800000,
2900000, };
static const unsigned int vcsi_val_tbl[] = { 1200000, 1800000, };
static const unsigned int vdac_val_tbl[] = { 1200000, 1500000, 1800000,
2500000,};
static const unsigned int vdig_val_tbl[] = { 1200000, 1350000, 1500000,
1875000, };
static const unsigned int vfuse_val_tbl[] = { 1500000, 1600000, 1700000,
1800000, 1900000, 2000000,
2100000, 2200000, 2300000,
2400000, 2500000, 2600000,
2700000, 3150000, };
static const unsigned int vhvio_val_tbl[] = { 2775000, };
static const unsigned int vsdio_val_tbl[] = { 1500000, 1600000, 1800000,
2600000, 2700000, 2800000,
2900000, 3000000, };
static const unsigned int vpll_val_tbl[] = { 1200000, 1300000, 1400000,
1800000, };
/* Quirk: 2775000 is before 2500000 for vrf1 regulator */
static const unsigned int vrf1_val_tbl[] = { 2775000, 2500000, };
static const unsigned int vrf2_val_tbl[] = { 0, 2775000, };
static const unsigned int vrfref_val_tbl[] = { 2500000, 2775000, };
static const unsigned int vwlan1_val_tbl[] = { 1800000, 1900000, };
static const unsigned int vwlan2_val_tbl[] = { 2775000, 3000000, 3300000,
3300000, };
static const unsigned int vsim_val_tbl[] = { 1800000, 2900000, };
static const unsigned int vsimcard_val_tbl[] = { 1800000, 2900000, };
static const unsigned int vvib_val_tbl[] = { 1300000, 1800000, 2000000,
3000000, };
static const unsigned int vusb_val_tbl[] = { 0, 3300000, };
static const unsigned int vaudio_val_tbl[] = { 0, 2775000, };
/*
* SoC specific configuration for omap4. The data below is comes from Motorola
* Linux kernel tree. It's basically the values of cpcap_regltr_data,
* cpcap_regulator_mode_values and cpcap_regulator_off_mode_values, see
* CPCAP_REG macro above.
*
* SW1 to SW4 and SW6 seems to be unused for mapphone. Note that VSIM and
* VSIMCARD have a shared resource assignment bit.
*/
static const struct cpcap_regulator omap4_regulators[] = {
CPCAP_REG(SW1, CPCAP_REG_S1C1, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW1_SEL, unknown_val_tbl,
0, 0, 0, 0, 0),
CPCAP_REG(SW2, CPCAP_REG_S2C1, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW2_SEL, unknown_val_tbl,
0, 0, 0, 0, 0),
CPCAP_REG(SW3, CPCAP_REG_S3C, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW3_SEL, unknown_val_tbl,
0, 0, 0, 0, 0),
CPCAP_REG(SW4, CPCAP_REG_S4C1, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW4_SEL, unknown_val_tbl,
0, 0, 0, 0, 0),
CPCAP_REG(SW5, CPCAP_REG_S5C, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW5_SEL, sw5_val_tbl,
0x28, 0, 0x20 | CPCAP_REG_OFF_MODE_SEC, 0, 0),
CPCAP_REG(SW6, CPCAP_REG_S6C, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW6_SEL, unknown_val_tbl,
0, 0, 0, 0, 0),
CPCAP_REG(VCAM, CPCAP_REG_VCAMC, CPCAP_REG_ASSIGN2,
CPCAP_BIT_VCAM_SEL, vcam_val_tbl,
0x87, 0x30, 0x3, 0, 420),
CPCAP_REG(VCSI, CPCAP_REG_VCSIC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VCSI_SEL, vcsi_val_tbl,
0x47, 0x10, 0x43, 0x41, 350),
CPCAP_REG(VDAC, CPCAP_REG_VDACC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VDAC_SEL, vdac_val_tbl,
0x87, 0x30, 0x3, 0, 420),
CPCAP_REG(VDIG, CPCAP_REG_VDIGC, CPCAP_REG_ASSIGN2,
CPCAP_BIT_VDIG_SEL, vdig_val_tbl,
0x87, 0x30, 0x82, 0, 420),
CPCAP_REG(VFUSE, CPCAP_REG_VFUSEC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VFUSE_SEL, vfuse_val_tbl,
0x80, 0xf, 0x80, 0, 420),
CPCAP_REG(VHVIO, CPCAP_REG_VHVIOC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VHVIO_SEL, vhvio_val_tbl,
0x17, 0, 0, 0x12, 0),
CPCAP_REG(VSDIO, CPCAP_REG_VSDIOC, CPCAP_REG_ASSIGN2,
CPCAP_BIT_VSDIO_SEL, vsdio_val_tbl,
0x87, 0x38, 0x82, 0, 420),
CPCAP_REG(VPLL, CPCAP_REG_VPLLC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VPLL_SEL, vpll_val_tbl,
0x43, 0x18, 0x2, 0, 420),
CPCAP_REG(VRF1, CPCAP_REG_VRF1C, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VRF1_SEL, vrf1_val_tbl,
0xac, 0x2, 0x4, 0, 10),
CPCAP_REG(VRF2, CPCAP_REG_VRF2C, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VRF2_SEL, vrf2_val_tbl,
0x23, 0x8, 0, 0, 10),
CPCAP_REG(VRFREF, CPCAP_REG_VRFREFC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VRFREF_SEL, vrfref_val_tbl,
0x23, 0x8, 0, 0, 420),
CPCAP_REG(VWLAN1, CPCAP_REG_VWLAN1C, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VWLAN1_SEL, vwlan1_val_tbl,
0x47, 0x10, 0, 0, 420),
CPCAP_REG(VWLAN2, CPCAP_REG_VWLAN2C, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VWLAN2_SEL, vwlan2_val_tbl,
0x20c, 0xc0, 0x20c, 0, 420),
CPCAP_REG(VSIM, CPCAP_REG_VSIMC, CPCAP_REG_ASSIGN3,
0xffff, vsim_val_tbl,
0x23, 0x8, 0x3, 0, 420),
CPCAP_REG(VSIMCARD, CPCAP_REG_VSIMC, CPCAP_REG_ASSIGN3,
0xffff, vsimcard_val_tbl,
0x1e80, 0x8, 0x1e00, 0, 420),
CPCAP_REG(VVIB, CPCAP_REG_VVIBC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VVIB_SEL, vvib_val_tbl,
0x1, 0xc, 0x1, 0, 500),
CPCAP_REG(VUSB, CPCAP_REG_VUSBC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VUSB_SEL, vusb_val_tbl,
0x11c, 0x40, 0xc, 0, 0),
CPCAP_REG(VAUDIO, CPCAP_REG_VAUDIOC, CPCAP_REG_ASSIGN4,
CPCAP_BIT_VAUDIO_SEL, vaudio_val_tbl,
0x16, 0x1, 0x4, 0, 0),
{ /* sentinel */ },
};
static const struct cpcap_regulator xoom_regulators[] = {
CPCAP_REG(SW1, CPCAP_REG_S1C1, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW1_SEL, unknown_val_tbl,
0, 0, 0, 0, 0),
CPCAP_REG(SW2, CPCAP_REG_S2C1, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW2_SEL, sw2_sw4_val_tbl,
0xf00, 0x7f, 0x800, 0, 120),
CPCAP_REG(SW3, CPCAP_REG_S3C, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW3_SEL, unknown_val_tbl,
0, 0, 0, 0, 0),
CPCAP_REG(SW4, CPCAP_REG_S4C1, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW4_SEL, sw2_sw4_val_tbl,
0xf00, 0x7f, 0x900, 0, 100),
CPCAP_REG(SW5, CPCAP_REG_S5C, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW5_SEL, sw5_val_tbl,
0x2a, 0, 0x22, 0, 0),
CPCAP_REG(SW6, CPCAP_REG_S6C, CPCAP_REG_ASSIGN2,
CPCAP_BIT_SW6_SEL, unknown_val_tbl,
0, 0, 0, 0, 0),
CPCAP_REG(VCAM, CPCAP_REG_VCAMC, CPCAP_REG_ASSIGN2,
CPCAP_BIT_VCAM_SEL, vcam_val_tbl,
0x87, 0x30, 0x7, 0, 420),
CPCAP_REG(VCSI, CPCAP_REG_VCSIC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VCSI_SEL, vcsi_val_tbl,
0x47, 0x10, 0x7, 0, 350),
CPCAP_REG(VDAC, CPCAP_REG_VDACC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VDAC_SEL, vdac_val_tbl,
0x87, 0x30, 0x3, 0, 420),
CPCAP_REG(VDIG, CPCAP_REG_VDIGC, CPCAP_REG_ASSIGN2,
CPCAP_BIT_VDIG_SEL, vdig_val_tbl,
0x87, 0x30, 0x5, 0, 420),
CPCAP_REG(VFUSE, CPCAP_REG_VFUSEC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VFUSE_SEL, vfuse_val_tbl,
0x80, 0xf, 0x80, 0, 420),
CPCAP_REG(VHVIO, CPCAP_REG_VHVIOC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VHVIO_SEL, vhvio_val_tbl,
0x17, 0, 0x2, 0, 0),
CPCAP_REG(VSDIO, CPCAP_REG_VSDIOC, CPCAP_REG_ASSIGN2,
CPCAP_BIT_VSDIO_SEL, vsdio_val_tbl,
0x87, 0x38, 0x2, 0, 420),
CPCAP_REG(VPLL, CPCAP_REG_VPLLC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VPLL_SEL, vpll_val_tbl,
0x43, 0x18, 0x1, 0, 420),
CPCAP_REG(VRF1, CPCAP_REG_VRF1C, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VRF1_SEL, vrf1_val_tbl,
0xac, 0x2, 0xc, 0, 10),
CPCAP_REG(VRF2, CPCAP_REG_VRF2C, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VRF2_SEL, vrf2_val_tbl,
0x23, 0x8, 0x3, 0, 10),
CPCAP_REG(VRFREF, CPCAP_REG_VRFREFC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VRFREF_SEL, vrfref_val_tbl,
0x23, 0x8, 0x3, 0, 420),
CPCAP_REG(VWLAN1, CPCAP_REG_VWLAN1C, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VWLAN1_SEL, vwlan1_val_tbl,
0x47, 0x10, 0x5, 0, 420),
CPCAP_REG(VWLAN2, CPCAP_REG_VWLAN2C, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VWLAN2_SEL, vwlan2_val_tbl,
0x20c, 0xc0, 0x8, 0, 420),
CPCAP_REG(VSIM, CPCAP_REG_VSIMC, CPCAP_REG_ASSIGN3,
0xffff, vsim_val_tbl,
0x23, 0x8, 0x3, 0, 420),
CPCAP_REG(VSIMCARD, CPCAP_REG_VSIMC, CPCAP_REG_ASSIGN3,
0xffff, vsimcard_val_tbl,
0x1e80, 0x8, 0x1e00, 0, 420),
CPCAP_REG(VVIB, CPCAP_REG_VVIBC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VVIB_SEL, vvib_val_tbl,
0x1, 0xc, 0, 0x1, 500),
CPCAP_REG(VUSB, CPCAP_REG_VUSBC, CPCAP_REG_ASSIGN3,
CPCAP_BIT_VUSB_SEL, vusb_val_tbl,
0x11c, 0x40, 0xc, 0, 0),
CPCAP_REG(VAUDIO, CPCAP_REG_VAUDIOC, CPCAP_REG_ASSIGN4,
CPCAP_BIT_VAUDIO_SEL, vaudio_val_tbl,
0x16, 0x1, 0x4, 0, 0),
{ /* sentinel */ },
};
static const struct of_device_id cpcap_regulator_id_table[] = {
{
.compatible = "motorola,cpcap-regulator",
},
{
.compatible = "motorola,mapphone-cpcap-regulator",
.data = omap4_regulators,
},
{
.compatible = "motorola,xoom-cpcap-regulator",
.data = xoom_regulators,
},
{},
};
MODULE_DEVICE_TABLE(of, cpcap_regulator_id_table);
static int cpcap_regulator_probe(struct platform_device *pdev)
{
struct cpcap_ddata *ddata;
const struct cpcap_regulator *match_data;
struct regulator_config config;
int i;
match_data = of_device_get_match_data(&pdev->dev);
if (!match_data) {
dev_err(&pdev->dev, "no configuration data found\n");
return -ENODEV;
}
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENOMEM;
ddata->reg = dev_get_regmap(pdev->dev.parent, NULL);
if (!ddata->reg)
return -ENODEV;
ddata->dev = &pdev->dev;
ddata->soc = match_data;
platform_set_drvdata(pdev, ddata);
memset(&config, 0, sizeof(config));
config.dev = &pdev->dev;
config.regmap = ddata->reg;
for (i = 0; i < CPCAP_NR_REGULATORS; i++) {
const struct cpcap_regulator *regulator = &ddata->soc[i];
struct regulator_dev *rdev;
if (!regulator->rdesc.name)
break;
if (regulator->rdesc.volt_table == unknown_val_tbl)
continue;
config.driver_data = (void *)regulator;
rdev = devm_regulator_register(&pdev->dev,
&regulator->rdesc,
&config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
regulator->rdesc.name);
return PTR_ERR(rdev);
}
}
return 0;
}
static struct platform_driver cpcap_regulator_driver = {
.probe = cpcap_regulator_probe,
.driver = {
.name = "cpcap-regulator",
.of_match_table = of_match_ptr(cpcap_regulator_id_table),
},
};
module_platform_driver(cpcap_regulator_driver);
MODULE_ALIAS("platform:cpcap-regulator");
MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
MODULE_DESCRIPTION("CPCAP regulator driver");
MODULE_LICENSE("GPL v2");