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![Axel Lin](/assets/img/avatar_default.png)
-EINVAL is not a valid return value for .of_map_mode, return
REGULATOR_MODE_INVALID instead.
Fixes: 65ac97042d
("regulator: da9121: add mode support")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Adam Ward <Adam.Ward.opensource@diasemi.com>
Link: https://lore.kernel.org/r/20210517052721.1063375-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>
1103 lines
31 KiB
C
1103 lines
31 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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//
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// DA9121 Single-channel dual-phase 10A buck converter
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//
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// Copyright (C) 2020 Axis Communications AB
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//
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// DA9130 Single-channel dual-phase 10A buck converter (Automotive)
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// DA9217 Single-channel dual-phase 6A buck converter
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// DA9122 Dual-channel single-phase 5A buck converter
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// DA9131 Dual-channel single-phase 5A buck converter (Automotive)
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// DA9220 Dual-channel single-phase 3A buck converter
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// DA9132 Dual-channel single-phase 3A buck converter (Automotive)
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//
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// Copyright (C) 2020 Dialog Semiconductor
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/driver.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/regulator/da9121.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include "da9121-regulator.h"
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/* Chip data */
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struct da9121 {
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struct device *dev;
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struct delayed_work work;
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struct da9121_pdata *pdata;
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struct regmap *regmap;
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struct regulator_dev *rdev[DA9121_IDX_MAX];
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unsigned int persistent[2];
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unsigned int passive_delay;
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int chip_irq;
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int variant_id;
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int subvariant_id;
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};
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/* Define ranges for different variants, enabling translation to/from
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* registers. Maximums give scope to allow for transients.
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*/
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struct da9121_range {
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int val_min;
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int val_max;
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int val_stp;
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int reg_min;
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int reg_max;
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};
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static struct da9121_range da9121_10A_2phase_current = {
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.val_min = 7000000,
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.val_max = 20000000,
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.val_stp = 1000000,
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.reg_min = 1,
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.reg_max = 14,
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};
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static struct da9121_range da9121_6A_2phase_current = {
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.val_min = 7000000,
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.val_max = 12000000,
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.val_stp = 1000000,
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.reg_min = 1,
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.reg_max = 6,
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};
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static struct da9121_range da9121_5A_1phase_current = {
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.val_min = 3500000,
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.val_max = 10000000,
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.val_stp = 500000,
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.reg_min = 1,
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.reg_max = 14,
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};
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static struct da9121_range da9121_3A_1phase_current = {
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.val_min = 3500000,
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.val_max = 6000000,
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.val_stp = 500000,
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.reg_min = 1,
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.reg_max = 6,
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};
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struct da9121_variant_info {
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int num_bucks;
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int num_phases;
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struct da9121_range *current_range;
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};
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static const struct da9121_variant_info variant_parameters[] = {
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{ 1, 2, &da9121_10A_2phase_current }, //DA9121_TYPE_DA9121_DA9130
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{ 2, 1, &da9121_3A_1phase_current }, //DA9121_TYPE_DA9220_DA9132
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{ 2, 1, &da9121_5A_1phase_current }, //DA9121_TYPE_DA9122_DA9131
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{ 1, 2, &da9121_6A_2phase_current }, //DA9121_TYPE_DA9217
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};
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struct da9121_field {
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unsigned int reg;
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unsigned int msk;
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};
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static const struct da9121_field da9121_current_field[2] = {
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{ DA9121_REG_BUCK_BUCK1_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
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{ DA9xxx_REG_BUCK_BUCK2_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
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};
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static const struct da9121_field da9121_mode_field[2] = {
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{ DA9121_REG_BUCK_BUCK1_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
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{ DA9xxx_REG_BUCK_BUCK2_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
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};
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struct status_event_data {
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int buck_id; /* 0=core, 1/2-buck */
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int reg_index; /* index for status/event/mask register selection */
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int status_bit; /* bit masks... */
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int event_bit;
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int mask_bit;
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unsigned long notification; /* Notification for status inception */
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char *warn; /* if NULL, notify - otherwise dev_warn this string */
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};
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#define DA9121_STATUS(id, bank, name, notification, warning) \
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{ id, bank, \
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DA9121_MASK_SYS_STATUS_##bank##_##name, \
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DA9121_MASK_SYS_EVENT_##bank##_E_##name, \
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DA9121_MASK_SYS_MASK_##bank##_M_##name, \
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notification, warning }
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/* For second buck related event bits that are specific to DA9122, DA9220 variants */
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#define DA9xxx_STATUS(id, bank, name, notification, warning) \
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{ id, bank, \
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DA9xxx_MASK_SYS_STATUS_##bank##_##name, \
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DA9xxx_MASK_SYS_EVENT_##bank##_E_##name, \
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DA9xxx_MASK_SYS_MASK_##bank##_M_##name, \
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notification, warning }
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/* The status signals that may need servicing, depending on device variant.
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* After assertion, they persist; so event is notified, the IRQ disabled,
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* and status polled until clear again and IRQ is reenabled.
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*
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* SG/PG1/PG2 should be set when device first powers up and should never
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* re-occur. When this driver starts, it is expected that these will have
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* self-cleared for when the IRQs are enabled, so these should never be seen.
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* If seen, the implication is that the device has reset.
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*
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* GPIO0/1/2 are not configured for use by default, so should not be seen.
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*/
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static const struct status_event_data status_event_handling[] = {
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DA9xxx_STATUS(0, 0, SG, 0, "Handled E_SG\n"),
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DA9121_STATUS(0, 0, TEMP_CRIT, (REGULATOR_EVENT_OVER_TEMP|REGULATOR_EVENT_DISABLE), NULL),
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DA9121_STATUS(0, 0, TEMP_WARN, REGULATOR_EVENT_OVER_TEMP, NULL),
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DA9121_STATUS(1, 1, PG1, 0, "Handled E_PG1\n"),
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DA9121_STATUS(1, 1, OV1, REGULATOR_EVENT_REGULATION_OUT, NULL),
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DA9121_STATUS(1, 1, UV1, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
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DA9121_STATUS(1, 1, OC1, REGULATOR_EVENT_OVER_CURRENT, NULL),
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DA9xxx_STATUS(2, 1, PG2, 0, "Handled E_PG2\n"),
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DA9xxx_STATUS(2, 1, OV2, REGULATOR_EVENT_REGULATION_OUT, NULL),
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DA9xxx_STATUS(2, 1, UV2, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
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DA9xxx_STATUS(2, 1, OC2, REGULATOR_EVENT_OVER_CURRENT, NULL),
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DA9121_STATUS(0, 2, GPIO0, 0, "Handled E_GPIO0\n"),
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DA9121_STATUS(0, 2, GPIO1, 0, "Handled E_GPIO1\n"),
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DA9121_STATUS(0, 2, GPIO2, 0, "Handled E_GPIO2\n"),
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};
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static int da9121_get_current_limit(struct regulator_dev *rdev)
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{
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struct da9121 *chip = rdev_get_drvdata(rdev);
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int id = rdev_get_id(rdev);
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struct da9121_range *range =
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variant_parameters[chip->variant_id].current_range;
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unsigned int val = 0;
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int ret = 0;
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ret = regmap_read(chip->regmap, da9121_current_field[id].reg, &val);
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if (ret < 0) {
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dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
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goto error;
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}
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if (val < range->reg_min) {
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ret = -EACCES;
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goto error;
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}
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if (val > range->reg_max) {
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ret = -EINVAL;
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goto error;
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}
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return range->val_min + (range->val_stp * (val - range->reg_min));
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error:
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return ret;
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}
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static int da9121_ceiling_selector(struct regulator_dev *rdev,
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int min, int max,
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unsigned int *selector)
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{
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struct da9121 *chip = rdev_get_drvdata(rdev);
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struct da9121_range *range =
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variant_parameters[chip->variant_id].current_range;
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unsigned int level;
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unsigned int i = 0;
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unsigned int sel = 0;
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int ret = 0;
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if (range->val_min > max || range->val_max < min) {
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dev_err(chip->dev,
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"Requested current out of regulator capability\n");
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ret = -EINVAL;
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goto error;
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}
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level = range->val_max;
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for (i = range->reg_max; i >= range->reg_min; i--) {
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if (level <= max) {
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sel = i;
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break;
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}
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level -= range->val_stp;
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}
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if (level < min) {
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dev_err(chip->dev,
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"Best match falls below minimum requested current\n");
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ret = -EINVAL;
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goto error;
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}
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*selector = sel;
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error:
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return ret;
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}
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static int da9121_set_current_limit(struct regulator_dev *rdev,
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int min_ua, int max_ua)
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{
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struct da9121 *chip = rdev_get_drvdata(rdev);
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int id = rdev_get_id(rdev);
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struct da9121_range *range =
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variant_parameters[chip->variant_id].current_range;
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unsigned int sel = 0;
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int ret = 0;
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if (min_ua < range->val_min ||
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max_ua > range->val_max) {
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ret = -EINVAL;
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goto error;
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}
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ret = da9121_ceiling_selector(rdev, min_ua, max_ua, &sel);
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if (ret < 0)
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goto error;
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ret = regmap_update_bits(chip->regmap,
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da9121_current_field[id].reg,
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da9121_current_field[id].msk,
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(unsigned int)sel);
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if (ret < 0)
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dev_err(chip->dev, "Cannot update BUCK current limit, err: %d\n", ret);
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error:
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return ret;
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}
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static unsigned int da9121_map_mode(unsigned int mode)
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{
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switch (mode) {
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case DA9121_BUCK_MODE_FORCE_PWM:
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return REGULATOR_MODE_FAST;
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case DA9121_BUCK_MODE_FORCE_PWM_SHEDDING:
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return REGULATOR_MODE_NORMAL;
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case DA9121_BUCK_MODE_AUTO:
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return REGULATOR_MODE_IDLE;
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case DA9121_BUCK_MODE_FORCE_PFM:
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return REGULATOR_MODE_STANDBY;
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default:
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return REGULATOR_MODE_INVALID;
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}
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}
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static int da9121_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
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{
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struct da9121 *chip = rdev_get_drvdata(rdev);
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int id = rdev_get_id(rdev);
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unsigned int val;
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switch (mode) {
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case REGULATOR_MODE_FAST:
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val = DA9121_BUCK_MODE_FORCE_PWM;
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break;
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case REGULATOR_MODE_NORMAL:
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val = DA9121_BUCK_MODE_FORCE_PWM_SHEDDING;
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break;
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case REGULATOR_MODE_IDLE:
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val = DA9121_BUCK_MODE_AUTO;
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break;
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case REGULATOR_MODE_STANDBY:
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val = DA9121_BUCK_MODE_FORCE_PFM;
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break;
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default:
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return -EINVAL;
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}
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return regmap_update_bits(chip->regmap,
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da9121_mode_field[id].reg,
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da9121_mode_field[id].msk,
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val);
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}
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static unsigned int da9121_buck_get_mode(struct regulator_dev *rdev)
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{
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struct da9121 *chip = rdev_get_drvdata(rdev);
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int id = rdev_get_id(rdev);
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unsigned int val, mode;
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int ret = 0;
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ret = regmap_read(chip->regmap, da9121_mode_field[id].reg, &val);
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if (ret < 0) {
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dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
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return -EINVAL;
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}
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mode = da9121_map_mode(val & da9121_mode_field[id].msk);
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if (mode == REGULATOR_MODE_INVALID)
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return -EINVAL;
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return mode;
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}
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static const struct regulator_ops da9121_buck_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.list_voltage = regulator_list_voltage_linear,
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.get_current_limit = da9121_get_current_limit,
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.set_current_limit = da9121_set_current_limit,
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.set_mode = da9121_buck_set_mode,
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.get_mode = da9121_buck_get_mode,
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};
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static struct of_regulator_match da9121_matches[] = {
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[DA9121_IDX_BUCK1] = { .name = "buck1" },
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[DA9121_IDX_BUCK2] = { .name = "buck2" },
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};
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static int da9121_of_parse_cb(struct device_node *np,
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const struct regulator_desc *desc,
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struct regulator_config *config)
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{
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struct da9121 *chip = config->driver_data;
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struct da9121_pdata *pdata;
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struct gpio_desc *ena_gpiod;
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if (chip->pdata == NULL) {
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pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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} else {
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pdata = chip->pdata;
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}
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pdata->num_buck++;
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if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) {
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dev_err(chip->dev, "Error: excessive regulators for device\n");
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return -ENODEV;
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}
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ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0,
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GPIOD_OUT_HIGH |
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GPIOD_FLAGS_BIT_NONEXCLUSIVE,
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"da9121-enable");
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if (!IS_ERR(ena_gpiod))
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config->ena_gpiod = ena_gpiod;
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if (variant_parameters[chip->variant_id].num_bucks == 2) {
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uint32_t ripple_cancel;
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uint32_t ripple_reg;
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int ret;
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if (of_property_read_u32(da9121_matches[pdata->num_buck-1].of_node,
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"dlg,ripple-cancel", &ripple_cancel)) {
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if (pdata->num_buck > 1)
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ripple_reg = DA9xxx_REG_BUCK_BUCK2_7;
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else
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ripple_reg = DA9121_REG_BUCK_BUCK1_7;
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ret = regmap_update_bits(chip->regmap, ripple_reg,
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DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL,
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ripple_cancel);
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if (ret < 0)
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dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret);
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}
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}
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return 0;
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}
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#define DA9121_MIN_MV 300
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#define DA9121_MAX_MV 1900
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#define DA9121_STEP_MV 10
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#define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV)
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#define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
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+ 1 + DA9121_MIN_SEL)
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static const struct regulator_desc da9121_reg = {
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.id = DA9121_IDX_BUCK1,
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.name = "da9121",
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.of_match = "buck1",
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.of_parse_cb = da9121_of_parse_cb,
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.owner = THIS_MODULE,
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.regulators_node = of_match_ptr("regulators"),
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.of_map_mode = da9121_map_mode,
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.ops = &da9121_buck_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = DA9121_N_VOLTAGES,
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.min_uV = DA9121_MIN_MV * 1000,
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.uV_step = DA9121_STEP_MV * 1000,
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.linear_min_sel = DA9121_MIN_SEL,
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.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
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.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
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.enable_reg = DA9121_REG_BUCK_BUCK1_0,
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.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
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/* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
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.ramp_delay = 20000,
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/* tBUCK_EN */
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.enable_time = 20,
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};
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static const struct regulator_desc da9220_reg[2] = {
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{
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.id = DA9121_IDX_BUCK1,
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.name = "DA9220/DA9132 BUCK1",
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.of_match = "buck1",
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.of_parse_cb = da9121_of_parse_cb,
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.owner = THIS_MODULE,
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.regulators_node = of_match_ptr("regulators"),
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.of_map_mode = da9121_map_mode,
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.ops = &da9121_buck_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = DA9121_N_VOLTAGES,
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.min_uV = DA9121_MIN_MV * 1000,
|
|
.uV_step = DA9121_STEP_MV * 1000,
|
|
.linear_min_sel = DA9121_MIN_SEL,
|
|
.enable_reg = DA9121_REG_BUCK_BUCK1_0,
|
|
.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
|
|
.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
|
|
.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
|
|
},
|
|
{
|
|
.id = DA9121_IDX_BUCK2,
|
|
.name = "DA9220/DA9132 BUCK2",
|
|
.of_match = "buck2",
|
|
.of_parse_cb = da9121_of_parse_cb,
|
|
.owner = THIS_MODULE,
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.of_map_mode = da9121_map_mode,
|
|
.ops = &da9121_buck_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.n_voltages = DA9121_N_VOLTAGES,
|
|
.min_uV = DA9121_MIN_MV * 1000,
|
|
.uV_step = DA9121_STEP_MV * 1000,
|
|
.linear_min_sel = DA9121_MIN_SEL,
|
|
.enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
|
|
.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
|
|
.vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
|
|
.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
|
|
}
|
|
};
|
|
|
|
static const struct regulator_desc da9122_reg[2] = {
|
|
{
|
|
.id = DA9121_IDX_BUCK1,
|
|
.name = "DA9122/DA9131 BUCK1",
|
|
.of_match = "buck1",
|
|
.of_parse_cb = da9121_of_parse_cb,
|
|
.owner = THIS_MODULE,
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.of_map_mode = da9121_map_mode,
|
|
.ops = &da9121_buck_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.n_voltages = DA9121_N_VOLTAGES,
|
|
.min_uV = DA9121_MIN_MV * 1000,
|
|
.uV_step = DA9121_STEP_MV * 1000,
|
|
.linear_min_sel = DA9121_MIN_SEL,
|
|
.enable_reg = DA9121_REG_BUCK_BUCK1_0,
|
|
.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
|
|
.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
|
|
.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
|
|
},
|
|
{
|
|
.id = DA9121_IDX_BUCK2,
|
|
.name = "DA9122/DA9131 BUCK2",
|
|
.of_match = "buck2",
|
|
.of_parse_cb = da9121_of_parse_cb,
|
|
.owner = THIS_MODULE,
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.of_map_mode = da9121_map_mode,
|
|
.ops = &da9121_buck_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.n_voltages = DA9121_N_VOLTAGES,
|
|
.min_uV = DA9121_MIN_MV * 1000,
|
|
.uV_step = DA9121_STEP_MV * 1000,
|
|
.linear_min_sel = DA9121_MIN_SEL,
|
|
.enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
|
|
.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
|
|
.vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
|
|
.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
|
|
}
|
|
};
|
|
|
|
static const struct regulator_desc da9217_reg = {
|
|
.id = DA9121_IDX_BUCK1,
|
|
.name = "DA9217 BUCK1",
|
|
.of_match = "buck1",
|
|
.of_parse_cb = da9121_of_parse_cb,
|
|
.owner = THIS_MODULE,
|
|
.regulators_node = of_match_ptr("regulators"),
|
|
.of_map_mode = da9121_map_mode,
|
|
.ops = &da9121_buck_ops,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.n_voltages = DA9121_N_VOLTAGES,
|
|
.min_uV = DA9121_MIN_MV * 1000,
|
|
.uV_step = DA9121_STEP_MV * 1000,
|
|
.linear_min_sel = DA9121_MIN_SEL,
|
|
.enable_reg = DA9121_REG_BUCK_BUCK1_0,
|
|
.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
|
|
.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
|
|
.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
|
|
};
|
|
|
|
static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = {
|
|
[DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL },
|
|
[DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] },
|
|
[DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] },
|
|
[DA9121_TYPE_DA9217] = { &da9217_reg, NULL },
|
|
};
|
|
|
|
static void da9121_status_poll_on(struct work_struct *work)
|
|
{
|
|
struct da9121 *chip = container_of(work, struct da9121, work.work);
|
|
int status[3] = {0};
|
|
int clear[3] = {0};
|
|
unsigned long delay;
|
|
int i;
|
|
int ret;
|
|
|
|
ret = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_STATUS_0, status, 2);
|
|
if (ret < 0) {
|
|
dev_err(chip->dev,
|
|
"Failed to read STATUS registers: %d\n", ret);
|
|
goto error;
|
|
}
|
|
|
|
/* Possible events are tested to be within range for the variant, potentially
|
|
* masked by the IRQ handler (not just warned about), as having been masked,
|
|
* and the respective state cleared - then flagged to unmask for next IRQ.
|
|
*/
|
|
for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
|
|
const struct status_event_data *item = &status_event_handling[i];
|
|
int reg_idx = item->reg_index;
|
|
bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
|
|
bool supported = (item->warn == NULL);
|
|
bool persisting = (chip->persistent[reg_idx] & item->event_bit);
|
|
bool now_cleared = !(status[reg_idx] & item->status_bit);
|
|
|
|
if (relevant && supported && persisting && now_cleared) {
|
|
clear[reg_idx] |= item->mask_bit;
|
|
chip->persistent[reg_idx] &= ~item->event_bit;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
if (clear[i]) {
|
|
unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
|
|
unsigned int mbit = clear[i];
|
|
|
|
ret = regmap_update_bits(chip->regmap, reg, mbit, 0);
|
|
if (ret < 0) {
|
|
dev_err(chip->dev,
|
|
"Failed to unmask 0x%02x %d\n",
|
|
reg, ret);
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (chip->persistent[0] | chip->persistent[1]) {
|
|
delay = msecs_to_jiffies(chip->passive_delay);
|
|
queue_delayed_work(system_freezable_wq, &chip->work, delay);
|
|
}
|
|
|
|
error:
|
|
return;
|
|
}
|
|
|
|
static irqreturn_t da9121_irq_handler(int irq, void *data)
|
|
{
|
|
struct da9121 *chip = data;
|
|
struct regulator_dev *rdev;
|
|
int event[3] = {0};
|
|
int handled[3] = {0};
|
|
int mask[3] = {0};
|
|
int ret = IRQ_NONE;
|
|
int i;
|
|
int err;
|
|
|
|
err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_EVENT_0, event, 3);
|
|
if (err < 0) {
|
|
dev_err(chip->dev, "Failed to read EVENT registers %d\n", err);
|
|
ret = IRQ_NONE;
|
|
goto error;
|
|
}
|
|
|
|
err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_MASK_0, mask, 3);
|
|
if (err < 0) {
|
|
dev_err(chip->dev,
|
|
"Failed to read MASK registers: %d\n", ret);
|
|
ret = IRQ_NONE;
|
|
goto error;
|
|
}
|
|
|
|
rdev = chip->rdev[DA9121_IDX_BUCK1];
|
|
|
|
/* Possible events are tested to be within range for the variant, currently
|
|
* enabled, and having triggered this IRQ. The event may then be notified,
|
|
* or a warning given for unexpected events - those from device POR, and
|
|
* currently unsupported GPIO configurations.
|
|
*/
|
|
for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
|
|
const struct status_event_data *item = &status_event_handling[i];
|
|
int reg_idx = item->reg_index;
|
|
bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
|
|
bool enabled = !(mask[reg_idx] & item->mask_bit);
|
|
bool active = (event[reg_idx] & item->event_bit);
|
|
bool notify = (item->warn == NULL);
|
|
|
|
if (relevant && enabled && active) {
|
|
if (notify) {
|
|
chip->persistent[reg_idx] |= item->event_bit;
|
|
regulator_notifier_call_chain(rdev, item->notification, NULL);
|
|
} else {
|
|
dev_warn(chip->dev, item->warn);
|
|
handled[reg_idx] |= item->event_bit;
|
|
ret = IRQ_HANDLED;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
if (event[i] != handled[i]) {
|
|
dev_warn(chip->dev,
|
|
"Unhandled event(s) in bank%d 0x%02x\n", i,
|
|
event[i] ^ handled[i]);
|
|
}
|
|
}
|
|
|
|
/* Mask the interrupts for persistent events OV, OC, UV, WARN, CRIT */
|
|
for (i = 0; i < 2; i++) {
|
|
if (handled[i]) {
|
|
unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
|
|
unsigned int mbit = handled[i];
|
|
|
|
err = regmap_update_bits(chip->regmap, reg, mbit, mbit);
|
|
if (err < 0) {
|
|
dev_err(chip->dev,
|
|
"Failed to mask 0x%02x interrupt %d\n",
|
|
reg, err);
|
|
ret = IRQ_NONE;
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* clear the events */
|
|
if (handled[0] | handled[1] | handled[2]) {
|
|
err = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_EVENT_0, handled, 3);
|
|
if (err < 0) {
|
|
dev_err(chip->dev, "Fail to write EVENTs %d\n", err);
|
|
ret = IRQ_NONE;
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
queue_delayed_work(system_freezable_wq, &chip->work, 0);
|
|
error:
|
|
return ret;
|
|
}
|
|
|
|
static int da9121_set_regulator_config(struct da9121 *chip)
|
|
{
|
|
struct regulator_config config = { };
|
|
unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks;
|
|
int ret = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < max_matches; i++) {
|
|
const struct regulator_desc *regl_desc =
|
|
local_da9121_regulators[chip->variant_id][i];
|
|
|
|
config.dev = chip->dev;
|
|
config.driver_data = chip;
|
|
config.regmap = chip->regmap;
|
|
|
|
chip->rdev[i] = devm_regulator_register(chip->dev,
|
|
regl_desc, &config);
|
|
if (IS_ERR(chip->rdev[i])) {
|
|
dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n",
|
|
regl_desc->name, (i+1), max_matches);
|
|
ret = PTR_ERR(chip->rdev[i]);
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
error:
|
|
return ret;
|
|
}
|
|
|
|
/* DA9121 chip register model */
|
|
static const struct regmap_range da9121_1ch_readable_ranges[] = {
|
|
regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
|
|
regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
|
|
regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
|
|
regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
|
|
regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
|
|
};
|
|
|
|
static const struct regmap_access_table da9121_1ch_readable_table = {
|
|
.yes_ranges = da9121_1ch_readable_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
|
|
};
|
|
|
|
static const struct regmap_range da9121_2ch_readable_ranges[] = {
|
|
regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
|
|
regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
|
|
regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
|
|
regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
|
|
regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
|
|
regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
|
|
};
|
|
|
|
static const struct regmap_access_table da9121_2ch_readable_table = {
|
|
.yes_ranges = da9121_2ch_readable_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
|
|
};
|
|
|
|
static const struct regmap_range da9121_1ch_writeable_ranges[] = {
|
|
regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
|
|
regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
|
|
regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
|
|
regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
|
|
regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
|
|
};
|
|
|
|
static const struct regmap_access_table da9121_1ch_writeable_table = {
|
|
.yes_ranges = da9121_1ch_writeable_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
|
|
};
|
|
|
|
static const struct regmap_range da9121_2ch_writeable_ranges[] = {
|
|
regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
|
|
regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
|
|
regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
|
|
regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
|
|
regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
|
|
regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
|
|
regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
|
|
};
|
|
|
|
static const struct regmap_access_table da9121_2ch_writeable_table = {
|
|
.yes_ranges = da9121_2ch_writeable_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
|
|
};
|
|
|
|
|
|
static const struct regmap_range da9121_volatile_ranges[] = {
|
|
regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
|
|
regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
|
|
regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
|
|
};
|
|
|
|
static const struct regmap_access_table da9121_volatile_table = {
|
|
.yes_ranges = da9121_volatile_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
|
|
};
|
|
|
|
/* DA9121 regmap config for 1 channel variants */
|
|
static struct regmap_config da9121_1ch_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = DA9121_REG_OTP_CONFIG_ID,
|
|
.rd_table = &da9121_1ch_readable_table,
|
|
.wr_table = &da9121_1ch_writeable_table,
|
|
.volatile_table = &da9121_volatile_table,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
};
|
|
|
|
/* DA9121 regmap config for 2 channel variants */
|
|
static struct regmap_config da9121_2ch_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = DA9121_REG_OTP_CONFIG_ID,
|
|
.rd_table = &da9121_2ch_readable_table,
|
|
.wr_table = &da9121_2ch_writeable_table,
|
|
.volatile_table = &da9121_volatile_table,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
};
|
|
|
|
static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
|
|
{
|
|
u32 device_id;
|
|
u32 variant_id;
|
|
u8 variant_mrc, variant_vrc;
|
|
char *type;
|
|
bool config_match = false;
|
|
int ret = 0;
|
|
|
|
ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
|
|
if (ret < 0) {
|
|
dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
|
|
goto error;
|
|
}
|
|
|
|
ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
|
|
if (ret < 0) {
|
|
dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
|
|
goto error;
|
|
}
|
|
|
|
if (device_id != DA9121_DEVICE_ID) {
|
|
dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
|
|
ret = -ENODEV;
|
|
goto error;
|
|
}
|
|
|
|
variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
|
|
|
|
switch (chip->subvariant_id) {
|
|
case DA9121_SUBTYPE_DA9121:
|
|
type = "DA9121";
|
|
config_match = (variant_vrc == DA9121_VARIANT_VRC);
|
|
break;
|
|
case DA9121_SUBTYPE_DA9130:
|
|
type = "DA9130";
|
|
config_match = (variant_vrc == DA9130_VARIANT_VRC);
|
|
break;
|
|
case DA9121_SUBTYPE_DA9220:
|
|
type = "DA9220";
|
|
config_match = (variant_vrc == DA9220_VARIANT_VRC);
|
|
break;
|
|
case DA9121_SUBTYPE_DA9132:
|
|
type = "DA9132";
|
|
config_match = (variant_vrc == DA9132_VARIANT_VRC);
|
|
break;
|
|
case DA9121_SUBTYPE_DA9122:
|
|
type = "DA9122";
|
|
config_match = (variant_vrc == DA9122_VARIANT_VRC);
|
|
break;
|
|
case DA9121_SUBTYPE_DA9131:
|
|
type = "DA9131";
|
|
config_match = (variant_vrc == DA9131_VARIANT_VRC);
|
|
break;
|
|
case DA9121_SUBTYPE_DA9217:
|
|
type = "DA9217";
|
|
config_match = (variant_vrc == DA9217_VARIANT_VRC);
|
|
break;
|
|
default:
|
|
type = "Unknown";
|
|
break;
|
|
}
|
|
|
|
dev_info(chip->dev,
|
|
"Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
|
|
device_id, variant_id, type);
|
|
|
|
if (!config_match) {
|
|
dev_err(chip->dev, "Device tree configuration does not match detected device.\n");
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
|
|
>> DA9121_SHIFT_OTP_VARIANT_ID_MRC;
|
|
|
|
if ((device_id == DA9121_DEVICE_ID) &&
|
|
(variant_mrc < DA9121_VARIANT_MRC_BASE)) {
|
|
dev_err(chip->dev,
|
|
"Cannot support variant MRC: 0x%02X\n", variant_mrc);
|
|
ret = -EINVAL;
|
|
}
|
|
error:
|
|
return ret;
|
|
}
|
|
|
|
static int da9121_assign_chip_model(struct i2c_client *i2c,
|
|
struct da9121 *chip)
|
|
{
|
|
struct regmap_config *regmap;
|
|
int ret = 0;
|
|
|
|
chip->dev = &i2c->dev;
|
|
|
|
/* Use configured subtype to select the regulator descriptor index and
|
|
* register map, common to both consumer and automotive grade variants
|
|
*/
|
|
switch (chip->subvariant_id) {
|
|
case DA9121_SUBTYPE_DA9121:
|
|
case DA9121_SUBTYPE_DA9130:
|
|
chip->variant_id = DA9121_TYPE_DA9121_DA9130;
|
|
regmap = &da9121_1ch_regmap_config;
|
|
break;
|
|
case DA9121_SUBTYPE_DA9217:
|
|
chip->variant_id = DA9121_TYPE_DA9217;
|
|
regmap = &da9121_1ch_regmap_config;
|
|
break;
|
|
case DA9121_SUBTYPE_DA9122:
|
|
case DA9121_SUBTYPE_DA9131:
|
|
chip->variant_id = DA9121_TYPE_DA9122_DA9131;
|
|
regmap = &da9121_2ch_regmap_config;
|
|
break;
|
|
case DA9121_SUBTYPE_DA9220:
|
|
case DA9121_SUBTYPE_DA9132:
|
|
chip->variant_id = DA9121_TYPE_DA9220_DA9132;
|
|
regmap = &da9121_2ch_regmap_config;
|
|
break;
|
|
}
|
|
|
|
/* Set these up for of_regulator_match call which may want .of_map_modes */
|
|
da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0];
|
|
da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1];
|
|
|
|
chip->regmap = devm_regmap_init_i2c(i2c, regmap);
|
|
if (IS_ERR(chip->regmap)) {
|
|
ret = PTR_ERR(chip->regmap);
|
|
dev_err(chip->dev, "Failed to configure a register map: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = da9121_check_device_type(i2c, chip);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int da9121_config_irq(struct i2c_client *i2c,
|
|
struct da9121 *chip)
|
|
{
|
|
unsigned int p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
|
|
const int mask_all[4] = { 0, 0, 0xFF, 0xFF };
|
|
int ret = 0;
|
|
|
|
chip->chip_irq = i2c->irq;
|
|
|
|
if (chip->chip_irq != 0) {
|
|
if (!of_property_read_u32(chip->dev->of_node,
|
|
"dlg,irq-polling-delay-passive-ms",
|
|
&p_delay)) {
|
|
if (p_delay < DA9121_MIN_POLLING_PERIOD_MS ||
|
|
p_delay > DA9121_MAX_POLLING_PERIOD_MS) {
|
|
dev_warn(chip->dev,
|
|
"Out-of-range polling period %d ms\n",
|
|
p_delay);
|
|
p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
|
|
}
|
|
}
|
|
|
|
chip->passive_delay = p_delay;
|
|
|
|
ret = request_threaded_irq(chip->chip_irq, NULL,
|
|
da9121_irq_handler,
|
|
IRQF_TRIGGER_LOW|IRQF_ONESHOT,
|
|
"da9121", chip);
|
|
if (ret != 0) {
|
|
dev_err(chip->dev, "Failed IRQ request: %d\n",
|
|
chip->chip_irq);
|
|
goto error;
|
|
}
|
|
|
|
ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
|
|
if (ret != 0) {
|
|
dev_err(chip->dev, "Failed to set IRQ masks: %d\n",
|
|
ret);
|
|
goto regmap_error;
|
|
}
|
|
|
|
INIT_DELAYED_WORK(&chip->work, da9121_status_poll_on);
|
|
dev_info(chip->dev, "Interrupt polling period set at %d ms\n",
|
|
chip->passive_delay);
|
|
}
|
|
error:
|
|
return ret;
|
|
regmap_error:
|
|
free_irq(chip->chip_irq, chip);
|
|
return ret;
|
|
}
|
|
|
|
static const struct of_device_id da9121_dt_ids[] = {
|
|
{ .compatible = "dlg,da9121", .data = (void *) DA9121_SUBTYPE_DA9121 },
|
|
{ .compatible = "dlg,da9130", .data = (void *) DA9121_SUBTYPE_DA9130 },
|
|
{ .compatible = "dlg,da9217", .data = (void *) DA9121_SUBTYPE_DA9217 },
|
|
{ .compatible = "dlg,da9122", .data = (void *) DA9121_SUBTYPE_DA9122 },
|
|
{ .compatible = "dlg,da9131", .data = (void *) DA9121_SUBTYPE_DA9131 },
|
|
{ .compatible = "dlg,da9220", .data = (void *) DA9121_SUBTYPE_DA9220 },
|
|
{ .compatible = "dlg,da9132", .data = (void *) DA9121_SUBTYPE_DA9132 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, da9121_dt_ids);
|
|
|
|
static inline int da9121_of_get_id(struct device *dev)
|
|
{
|
|
const struct of_device_id *id = of_match_device(da9121_dt_ids, dev);
|
|
|
|
if (!id) {
|
|
dev_err(dev, "%s: Failed\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
return (uintptr_t)id->data;
|
|
}
|
|
|
|
static int da9121_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct da9121 *chip;
|
|
const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
|
|
int ret = 0;
|
|
|
|
chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
|
|
if (!chip) {
|
|
ret = -ENOMEM;
|
|
goto error;
|
|
}
|
|
|
|
chip->pdata = i2c->dev.platform_data;
|
|
chip->subvariant_id = da9121_of_get_id(&i2c->dev);
|
|
|
|
ret = da9121_assign_chip_model(i2c, chip);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
|
|
if (ret != 0) {
|
|
dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
|
|
goto error;
|
|
}
|
|
|
|
ret = da9121_set_regulator_config(chip);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
ret = da9121_config_irq(i2c, chip);
|
|
|
|
error:
|
|
return ret;
|
|
}
|
|
|
|
static int da9121_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
struct da9121 *chip = i2c_get_clientdata(i2c);
|
|
const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
|
|
int ret = 0;
|
|
|
|
free_irq(chip->chip_irq, chip);
|
|
cancel_delayed_work_sync(&chip->work);
|
|
|
|
ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
|
|
if (ret != 0)
|
|
dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
static const struct i2c_device_id da9121_i2c_id[] = {
|
|
{"da9121", DA9121_TYPE_DA9121_DA9130},
|
|
{"da9130", DA9121_TYPE_DA9121_DA9130},
|
|
{"da9217", DA9121_TYPE_DA9217},
|
|
{"da9122", DA9121_TYPE_DA9122_DA9131},
|
|
{"da9131", DA9121_TYPE_DA9122_DA9131},
|
|
{"da9220", DA9121_TYPE_DA9220_DA9132},
|
|
{"da9132", DA9121_TYPE_DA9220_DA9132},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
|
|
|
|
static struct i2c_driver da9121_regulator_driver = {
|
|
.driver = {
|
|
.name = "da9121",
|
|
.of_match_table = of_match_ptr(da9121_dt_ids),
|
|
},
|
|
.probe = da9121_i2c_probe,
|
|
.remove = da9121_i2c_remove,
|
|
.id_table = da9121_i2c_id,
|
|
};
|
|
|
|
module_i2c_driver(da9121_regulator_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|