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linux-next/drivers/regulator/tps65023-regulator.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* tps65023-regulator.c
*
* Supports TPS65023 Regulator
*
* Copyright (C) 2009 Texas Instrument Incorporated - https://www.ti.com/
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/i2c.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
#include <linux/regmap.h>
/* Register definitions */
#define TPS65023_REG_VERSION 0
#define TPS65023_REG_PGOODZ 1
#define TPS65023_REG_MASK 2
#define TPS65023_REG_REG_CTRL 3
#define TPS65023_REG_CON_CTRL 4
#define TPS65023_REG_CON_CTRL2 5
#define TPS65023_REG_DEF_CORE 6
#define TPS65023_REG_DEFSLEW 7
#define TPS65023_REG_LDO_CTRL 8
/* PGOODZ bitfields */
#define TPS65023_PGOODZ_PWRFAILZ BIT(7)
#define TPS65023_PGOODZ_LOWBATTZ BIT(6)
#define TPS65023_PGOODZ_VDCDC1 BIT(5)
#define TPS65023_PGOODZ_VDCDC2 BIT(4)
#define TPS65023_PGOODZ_VDCDC3 BIT(3)
#define TPS65023_PGOODZ_LDO2 BIT(2)
#define TPS65023_PGOODZ_LDO1 BIT(1)
/* MASK bitfields */
#define TPS65023_MASK_PWRFAILZ BIT(7)
#define TPS65023_MASK_LOWBATTZ BIT(6)
#define TPS65023_MASK_VDCDC1 BIT(5)
#define TPS65023_MASK_VDCDC2 BIT(4)
#define TPS65023_MASK_VDCDC3 BIT(3)
#define TPS65023_MASK_LDO2 BIT(2)
#define TPS65023_MASK_LDO1 BIT(1)
/* REG_CTRL bitfields */
#define TPS65023_REG_CTRL_VDCDC1_EN BIT(5)
#define TPS65023_REG_CTRL_VDCDC2_EN BIT(4)
#define TPS65023_REG_CTRL_VDCDC3_EN BIT(3)
#define TPS65023_REG_CTRL_LDO2_EN BIT(2)
#define TPS65023_REG_CTRL_LDO1_EN BIT(1)
/* REG_CTRL2 bitfields */
#define TPS65023_REG_CTRL2_GO BIT(7)
#define TPS65023_REG_CTRL2_CORE_ADJ BIT(6)
#define TPS65023_REG_CTRL2_DCDC2 BIT(2)
#define TPS65023_REG_CTRL2_DCDC1 BIT(1)
#define TPS65023_REG_CTRL2_DCDC3 BIT(0)
/* Number of step-down converters available */
#define TPS65023_NUM_DCDC 3
/* Number of LDO voltage regulators available */
#define TPS65023_NUM_LDO 2
/* Number of total regulators available */
#define TPS65023_NUM_REGULATOR (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
/* DCDCs */
#define TPS65023_DCDC_1 0
#define TPS65023_DCDC_2 1
#define TPS65023_DCDC_3 2
/* LDOs */
#define TPS65023_LDO_1 3
#define TPS65023_LDO_2 4
#define TPS65023_MAX_REG_ID TPS65023_LDO_2
#define TPS65023_REGULATOR_DCDC(_num, _t, _em) \
{ \
.name = "VDCDC"#_num, \
.of_match = of_match_ptr("VDCDC"#_num), \
.regulators_node = of_match_ptr("regulators"), \
.id = TPS65023_DCDC_##_num, \
.n_voltages = ARRAY_SIZE(_t), \
.ops = &tps65023_dcdc_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.volt_table = _t, \
.vsel_reg = TPS65023_REG_DEF_CORE, \
.vsel_mask = ARRAY_SIZE(_t) - 1, \
.enable_mask = _em, \
.enable_reg = TPS65023_REG_REG_CTRL, \
.apply_reg = TPS65023_REG_CON_CTRL2, \
.apply_bit = TPS65023_REG_CTRL2_GO, \
} \
#define TPS65023_REGULATOR_LDO(_num, _t, _vm) \
{ \
.name = "LDO"#_num, \
.of_match = of_match_ptr("LDO"#_num), \
.regulators_node = of_match_ptr("regulators"), \
.id = TPS65023_LDO_##_num, \
.n_voltages = ARRAY_SIZE(_t), \
.ops = &tps65023_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.volt_table = _t, \
.vsel_reg = TPS65023_REG_LDO_CTRL, \
.vsel_mask = _vm, \
.enable_mask = 1 << (_num), \
.enable_reg = TPS65023_REG_REG_CTRL, \
} \
/* Supported voltage values for regulators */
static const unsigned int VCORE_VSEL_table[] = {
800000, 825000, 850000, 875000,
900000, 925000, 950000, 975000,
1000000, 1025000, 1050000, 1075000,
1100000, 1125000, 1150000, 1175000,
1200000, 1225000, 1250000, 1275000,
1300000, 1325000, 1350000, 1375000,
1400000, 1425000, 1450000, 1475000,
1500000, 1525000, 1550000, 1600000,
};
static const unsigned int DCDC_FIXED_3300000_VSEL_table[] = {
3300000,
};
static const unsigned int DCDC_FIXED_1800000_VSEL_table[] = {
1800000,
};
/* Supported voltage values for LDO regulators for tps65020 */
static const unsigned int TPS65020_LDO_VSEL_table[] = {
1000000, 1050000, 1100000, 1300000,
1800000, 2500000, 3000000, 3300000,
};
/* Supported voltage values for LDO regulators
* for tps65021 and tps65023 */
static const unsigned int TPS65023_LDO1_VSEL_table[] = {
1000000, 1100000, 1300000, 1800000,
2200000, 2600000, 2800000, 3150000,
};
static const unsigned int TPS65023_LDO2_VSEL_table[] = {
1050000, 1200000, 1300000, 1800000,
2500000, 2800000, 3000000, 3300000,
};
/* PMIC details */
struct tps_pmic {
struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
const struct tps_driver_data *driver_data;
struct regmap *regmap;
};
/* Struct passed as driver data */
struct tps_driver_data {
const struct regulator_desc *desc;
u8 core_regulator;
};
static int tps65023_dcdc_get_voltage_sel(struct regulator_dev *dev)
{
struct tps_pmic *tps = rdev_get_drvdata(dev);
int dcdc = rdev_get_id(dev);
if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
return -EINVAL;
if (dcdc != tps->driver_data->core_regulator)
return 0;
return regulator_get_voltage_sel_regmap(dev);
}
static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev,
unsigned selector)
{
struct tps_pmic *tps = rdev_get_drvdata(dev);
int dcdc = rdev_get_id(dev);
if (dcdc != tps->driver_data->core_regulator)
return -EINVAL;
return regulator_set_voltage_sel_regmap(dev, selector);
}
/* Operations permitted on VDCDCx */
static const struct regulator_ops tps65023_dcdc_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_voltage_sel = tps65023_dcdc_get_voltage_sel,
.set_voltage_sel = tps65023_dcdc_set_voltage_sel,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
};
/* Operations permitted on LDOx */
static const struct regulator_ops tps65023_ldo_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
};
static const struct regmap_config tps65023_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static const struct regulator_desc tps65020_regulators[] = {
TPS65023_REGULATOR_DCDC(1, DCDC_FIXED_3300000_VSEL_table, 0x20),
TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_1800000_VSEL_table, 0x10),
TPS65023_REGULATOR_DCDC(3, VCORE_VSEL_table, 0x08),
TPS65023_REGULATOR_LDO(1, TPS65020_LDO_VSEL_table, 0x07),
TPS65023_REGULATOR_LDO(2, TPS65020_LDO_VSEL_table, 0x70),
};
static const struct regulator_desc tps65021_regulators[] = {
TPS65023_REGULATOR_DCDC(1, DCDC_FIXED_3300000_VSEL_table, 0x20),
TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_1800000_VSEL_table, 0x10),
TPS65023_REGULATOR_DCDC(3, VCORE_VSEL_table, 0x08),
TPS65023_REGULATOR_LDO(1, TPS65023_LDO1_VSEL_table, 0x07),
TPS65023_REGULATOR_LDO(2, TPS65023_LDO2_VSEL_table, 0x70),
};
static const struct regulator_desc tps65023_regulators[] = {
TPS65023_REGULATOR_DCDC(1, VCORE_VSEL_table, 0x20),
TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_3300000_VSEL_table, 0x10),
TPS65023_REGULATOR_DCDC(3, DCDC_FIXED_1800000_VSEL_table, 0x08),
TPS65023_REGULATOR_LDO(1, TPS65023_LDO1_VSEL_table, 0x07),
TPS65023_REGULATOR_LDO(2, TPS65023_LDO2_VSEL_table, 0x70),
};
static struct tps_driver_data tps65020_drv_data = {
.desc = tps65020_regulators,
.core_regulator = TPS65023_DCDC_3,
};
static struct tps_driver_data tps65021_drv_data = {
.desc = tps65021_regulators,
.core_regulator = TPS65023_DCDC_3,
};
static struct tps_driver_data tps65023_drv_data = {
.desc = tps65023_regulators,
.core_regulator = TPS65023_DCDC_1,
};
static int tps_65023_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct regulator_init_data *init_data = dev_get_platdata(&client->dev);
struct regulator_config config = { };
struct tps_pmic *tps;
int i;
int error;
tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
if (!tps)
return -ENOMEM;
tps->driver_data = (struct tps_driver_data *)id->driver_data;
tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
if (IS_ERR(tps->regmap)) {
error = PTR_ERR(tps->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
error);
return error;
}
/* common for all regulators */
config.dev = &client->dev;
config.driver_data = tps;
config.regmap = tps->regmap;
for (i = 0; i < TPS65023_NUM_REGULATOR; i++) {
if (init_data)
config.init_data = &init_data[i];
/* Register the regulators */
tps->rdev[i] = devm_regulator_register(&client->dev,
&tps->driver_data->desc[i], &config);
if (IS_ERR(tps->rdev[i])) {
dev_err(&client->dev, "failed to register %s\n",
id->name);
return PTR_ERR(tps->rdev[i]);
}
}
i2c_set_clientdata(client, tps);
/* Enable setting output voltage by I2C */
regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
TPS65023_REG_CTRL2_CORE_ADJ, 0);
return 0;
}
static const struct of_device_id __maybe_unused tps65023_of_match[] = {
{ .compatible = "ti,tps65020", .data = &tps65020_drv_data},
{ .compatible = "ti,tps65021", .data = &tps65021_drv_data},
{ .compatible = "ti,tps65023", .data = &tps65023_drv_data},
{},
};
MODULE_DEVICE_TABLE(of, tps65023_of_match);
static const struct i2c_device_id tps_65023_id[] = {
{
.name = "tps65023",
.driver_data = (kernel_ulong_t)&tps65023_drv_data
}, {
.name = "tps65021",
.driver_data = (kernel_ulong_t)&tps65021_drv_data
}, {
.name = "tps65020",
.driver_data = (kernel_ulong_t)&tps65020_drv_data
},
{ },
};
MODULE_DEVICE_TABLE(i2c, tps_65023_id);
static struct i2c_driver tps_65023_i2c_driver = {
.driver = {
.name = "tps65023",
regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in 4.14 Probing of regulators can be a slow operation and can contribute to slower boot times. This is especially true if a regulator is turned on at probe time (with regulator-boot-on or regulator-always-on) and the regulator requires delays (off-on-time, ramp time, etc). While the overall kernel is not ready to switch to async probe by default, as per the discussion on the mailing lists [1] it is believed that the regulator subsystem is in good shape and we can move regulator drivers over wholesale. There is no way to just magically opt in all regulators (regulators are just normal drivers like platform_driver), so we set PROBE_PREFER_ASYNCHRONOUS for all regulators found in 'drivers/regulator' individually. Given the number of drivers touched and the impossibility to test this ahead of time, it wouldn't be shocking at all if this caused a regression for someone. If there is a regression caused by this patch, it's likely to be one of the cases talked about in [1]. As a "quick fix", drivers involved in the regression could be fixed by changing them to PROBE_FORCE_SYNCHRONOUS. That being said, the correct fix would be to directly fix the problem that caused the issue with async probe. The approach here follows a similar approach that was used for the mmc subsystem several years ago [2]. In fact, I ran nearly the same python script to auto-generate the changes. The only thing I changed was to search for "i2c_driver", "spmi_driver", and "spi_driver" in addition to "platform_driver". [1] https://lore.kernel.org/r/06db017f-e985-4434-8d1d-02ca2100cca0@sirena.org.uk [2] https://lore.kernel.org/r/20200903232441.2694866-1-dianders@chromium.org/ Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/20230316125351.1.I2a4677392a38db5758dee0788b2cea5872562a82@changeid Signed-off-by: Mark Brown <broonie@kernel.org>
2023-03-17 03:54:38 +08:00
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = of_match_ptr(tps65023_of_match),
},
.probe = tps_65023_probe,
.id_table = tps_65023_id,
};
static int __init tps_65023_init(void)
{
return i2c_add_driver(&tps_65023_i2c_driver);
}
subsys_initcall(tps_65023_init);
static void __exit tps_65023_cleanup(void)
{
i2c_del_driver(&tps_65023_i2c_driver);
}
module_exit(tps_65023_cleanup);
MODULE_AUTHOR("Texas Instruments");
MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
MODULE_LICENSE("GPL v2");