forked from luck/tmp_suning_uos_patched
66265e719b
The Kconfig currently controlling compilation of this code is: drivers/mfd/Kconfig:config MFD_TPS68470 drivers/mfd/Kconfig: bool "TI TPS68470 Power Management / LED chips" ...meaning that it currently is not being built as a module by anyone. Hence we remove the MODULE_DEVICE_TABLE since it is a no-op for non-modular code. There is no removal of <linux/module.h> here because there isn't one. Instead, it is relying on including that implicitly from an ACPI header. In cleaning up the ACPI instance of module.h (which also isn't strictly needed), then this mfd driver breaks when MODULE_DEVICE_TABLE becomes undefined here. The easiest dependency solution is to simply defer the ACPI cleanup until this change is present in mainline. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
98 lines
2.1 KiB
C
98 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* TPS68470 chip Parent driver
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*
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* Copyright (C) 2017 Intel Corporation
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*
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* Authors:
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* Rajmohan Mani <rajmohan.mani@intel.com>
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* Tianshu Qiu <tian.shu.qiu@intel.com>
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* Jian Xu Zheng <jian.xu.zheng@intel.com>
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* Yuning Pu <yuning.pu@intel.com>
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*/
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#include <linux/acpi.h>
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/tps68470.h>
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#include <linux/regmap.h>
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static const struct mfd_cell tps68470s[] = {
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{ .name = "tps68470-gpio" },
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{ .name = "tps68470_pmic_opregion" },
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};
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static const struct regmap_config tps68470_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = TPS68470_REG_MAX,
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};
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static int tps68470_chip_init(struct device *dev, struct regmap *regmap)
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{
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unsigned int version;
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int ret;
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/* Force software reset */
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ret = regmap_write(regmap, TPS68470_REG_RESET, TPS68470_REG_RESET_MASK);
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if (ret)
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return ret;
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ret = regmap_read(regmap, TPS68470_REG_REVID, &version);
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if (ret) {
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dev_err(dev, "Failed to read revision register: %d\n", ret);
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return ret;
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}
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dev_info(dev, "TPS68470 REVID: 0x%x\n", version);
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return 0;
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}
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static int tps68470_probe(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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struct regmap *regmap;
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int ret;
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regmap = devm_regmap_init_i2c(client, &tps68470_regmap_config);
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if (IS_ERR(regmap)) {
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dev_err(dev, "devm_regmap_init_i2c Error %ld\n",
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PTR_ERR(regmap));
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return PTR_ERR(regmap);
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}
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i2c_set_clientdata(client, regmap);
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ret = tps68470_chip_init(dev, regmap);
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if (ret < 0) {
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dev_err(dev, "TPS68470 Init Error %d\n", ret);
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return ret;
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}
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ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, tps68470s,
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ARRAY_SIZE(tps68470s), NULL, 0, NULL);
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if (ret < 0) {
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dev_err(dev, "devm_mfd_add_devices failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static const struct acpi_device_id tps68470_acpi_ids[] = {
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{"INT3472"},
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{},
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};
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static struct i2c_driver tps68470_driver = {
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.driver = {
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.name = "tps68470",
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.acpi_match_table = tps68470_acpi_ids,
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},
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.probe_new = tps68470_probe,
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};
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builtin_i2c_driver(tps68470_driver);
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