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c01467355f
This commit prepares a following commit for the regulator part of the MFD. The driver should support different device chips that differ in their register definitions, for instance to control LDOA1 and SWB2. So it is necessary to use a dedicated regulator description for a specific device variant. Thus, the content from DEVICEID Register 1 is used to choose a dedicated configuration between the different device variants. Signed-off-by: Andre Werner <andre.werner@systec-electronic.com> Link: https://lore.kernel.org/r/20230818083721.29790-2-andre.werner@systec-electronic.com Signed-off-by: Lee Jones <lee@kernel.org>
147 lines
4 KiB
C
147 lines
4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
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* Andrew F. Davis <afd@ti.com>
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*
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* Based on the TPS65912 driver
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*/
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/mfd/core.h>
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#include <linux/module.h>
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#include <linux/mfd/tps65086.h>
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static const struct mfd_cell tps65086_cells[] = {
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{ .name = "tps65086-regulator", },
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{ .name = "tps65086-gpio", },
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{ .name = "tps65086-reset", },
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};
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static const struct regmap_range tps65086_yes_ranges[] = {
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regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ),
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regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC),
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regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL),
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regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS),
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};
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static const struct regmap_access_table tps65086_volatile_table = {
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.yes_ranges = tps65086_yes_ranges,
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.n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges),
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};
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static const struct regmap_config tps65086_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.cache_type = REGCACHE_RBTREE,
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.volatile_table = &tps65086_volatile_table,
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};
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static const struct regmap_irq tps65086_irqs[] = {
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REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
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REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
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REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
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};
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static struct regmap_irq_chip tps65086_irq_chip = {
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.name = "tps65086",
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.status_base = TPS65086_IRQ,
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.mask_base = TPS65086_IRQ_MASK,
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.ack_base = TPS65086_IRQ,
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.init_ack_masked = true,
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.num_regs = 1,
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.irqs = tps65086_irqs,
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.num_irqs = ARRAY_SIZE(tps65086_irqs),
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};
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static const struct of_device_id tps65086_of_match_table[] = {
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{ .compatible = "ti,tps65086", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
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static int tps65086_probe(struct i2c_client *client)
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{
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struct tps65086 *tps;
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unsigned int version;
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int ret;
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tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
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if (!tps)
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return -ENOMEM;
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i2c_set_clientdata(client, tps);
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tps->dev = &client->dev;
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tps->irq = client->irq;
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tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
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if (IS_ERR(tps->regmap)) {
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dev_err(tps->dev, "Failed to initialize register map\n");
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return PTR_ERR(tps->regmap);
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}
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/* Store device ID to load regulator configuration that fit to IC variant */
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ret = regmap_read(tps->regmap, TPS65086_DEVICEID1, &tps->chip_id);
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if (ret) {
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dev_err(tps->dev, "Failed to read revision register 1\n");
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return ret;
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}
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ret = regmap_read(tps->regmap, TPS65086_DEVICEID2, &version);
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if (ret) {
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dev_err(tps->dev, "Failed to read revision register 2\n");
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return ret;
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}
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dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
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(version & TPS65086_DEVICEID2_PART_MASK),
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(char)((version & TPS65086_DEVICEID2_OTP_MASK) >> 4) + 'A',
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(version & TPS65086_DEVICEID2_REV_MASK) >> 6);
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if (tps->irq > 0) {
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ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
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&tps65086_irq_chip, &tps->irq_data);
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if (ret) {
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dev_err(tps->dev, "Failed to register IRQ chip\n");
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return ret;
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}
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}
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ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
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ARRAY_SIZE(tps65086_cells), NULL, 0,
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regmap_irq_get_domain(tps->irq_data));
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if (ret && tps->irq > 0)
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regmap_del_irq_chip(tps->irq, tps->irq_data);
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return ret;
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}
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static void tps65086_remove(struct i2c_client *client)
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{
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struct tps65086 *tps = i2c_get_clientdata(client);
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if (tps->irq > 0)
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regmap_del_irq_chip(tps->irq, tps->irq_data);
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}
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static const struct i2c_device_id tps65086_id_table[] = {
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{ "tps65086", 0 },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
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static struct i2c_driver tps65086_driver = {
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.driver = {
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.name = "tps65086",
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.of_match_table = tps65086_of_match_table,
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},
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.probe = tps65086_probe,
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.remove = tps65086_remove,
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.id_table = tps65086_id_table,
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};
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module_i2c_driver(tps65086_driver);
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MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
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MODULE_DESCRIPTION("TPS65086 PMIC Driver");
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MODULE_LICENSE("GPL v2");
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