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- /*
- * Copyright (c) 2014, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/spmi.h>
- #include <linux/regmap.h>
- #include <linux/of_platform.h>
- #define PMIC_REV2 0x101
- #define PMIC_REV3 0x102
- #define PMIC_REV4 0x103
- #define PMIC_TYPE 0x104
- #define PMIC_SUBTYPE 0x105
- #define PMIC_TYPE_VALUE 0x51
- #define COMMON_SUBTYPE 0x00
- #define PM8941_SUBTYPE 0x01
- #define PM8841_SUBTYPE 0x02
- #define PM8019_SUBTYPE 0x03
- #define PM8226_SUBTYPE 0x04
- #define PM8110_SUBTYPE 0x05
- #define PMA8084_SUBTYPE 0x06
- #define PMI8962_SUBTYPE 0x07
- #define PMD9635_SUBTYPE 0x08
- #define PM8994_SUBTYPE 0x09
- #define PMI8994_SUBTYPE 0x0a
- #define PM8916_SUBTYPE 0x0b
- #define PM8004_SUBTYPE 0x0c
- #define PM8909_SUBTYPE 0x0d
- static const struct of_device_id pmic_spmi_id_table[] = {
- { .compatible = "qcom,spmi-pmic", .data = (void *)COMMON_SUBTYPE },
- { .compatible = "qcom,pm8941", .data = (void *)PM8941_SUBTYPE },
- { .compatible = "qcom,pm8841", .data = (void *)PM8841_SUBTYPE },
- { .compatible = "qcom,pm8019", .data = (void *)PM8019_SUBTYPE },
- { .compatible = "qcom,pm8226", .data = (void *)PM8226_SUBTYPE },
- { .compatible = "qcom,pm8110", .data = (void *)PM8110_SUBTYPE },
- { .compatible = "qcom,pma8084", .data = (void *)PMA8084_SUBTYPE },
- { .compatible = "qcom,pmi8962", .data = (void *)PMI8962_SUBTYPE },
- { .compatible = "qcom,pmd9635", .data = (void *)PMD9635_SUBTYPE },
- { .compatible = "qcom,pm8994", .data = (void *)PM8994_SUBTYPE },
- { .compatible = "qcom,pmi8994", .data = (void *)PMI8994_SUBTYPE },
- { .compatible = "qcom,pm8916", .data = (void *)PM8916_SUBTYPE },
- { .compatible = "qcom,pm8004", .data = (void *)PM8004_SUBTYPE },
- { .compatible = "qcom,pm8909", .data = (void *)PM8909_SUBTYPE },
- { }
- };
- static void pmic_spmi_show_revid(struct regmap *map, struct device *dev)
- {
- unsigned int rev2, minor, major, type, subtype;
- const char *name = "unknown";
- int ret, i;
- ret = regmap_read(map, PMIC_TYPE, &type);
- if (ret < 0)
- return;
- if (type != PMIC_TYPE_VALUE)
- return;
- ret = regmap_read(map, PMIC_SUBTYPE, &subtype);
- if (ret < 0)
- return;
- for (i = 0; i < ARRAY_SIZE(pmic_spmi_id_table); i++) {
- if (subtype == (unsigned long)pmic_spmi_id_table[i].data)
- break;
- }
- if (i != ARRAY_SIZE(pmic_spmi_id_table))
- name = pmic_spmi_id_table[i].compatible;
- ret = regmap_read(map, PMIC_REV2, &rev2);
- if (ret < 0)
- return;
- ret = regmap_read(map, PMIC_REV3, &minor);
- if (ret < 0)
- return;
- ret = regmap_read(map, PMIC_REV4, &major);
- if (ret < 0)
- return;
- /*
- * In early versions of PM8941 and PM8226, the major revision number
- * started incrementing from 0 (eg 0 = v1.0, 1 = v2.0).
- * Increment the major revision number here if the chip is an early
- * version of PM8941 or PM8226.
- */
- if ((subtype == PM8941_SUBTYPE || subtype == PM8226_SUBTYPE) &&
- major < 0x02)
- major++;
- if (subtype == PM8110_SUBTYPE)
- minor = rev2;
- dev_dbg(dev, "%x: %s v%d.%d\n", subtype, name, major, minor);
- }
- static const struct regmap_config spmi_regmap_config = {
- .reg_bits = 16,
- .val_bits = 8,
- .max_register = 0xffff,
- .fast_io = true,
- };
- static int pmic_spmi_probe(struct spmi_device *sdev)
- {
- struct device_node *root = sdev->dev.of_node;
- struct regmap *regmap;
- regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config);
- if (IS_ERR(regmap))
- return PTR_ERR(regmap);
- /* Only the first slave id for a PMIC contains this information */
- if (sdev->usid % 2 == 0)
- pmic_spmi_show_revid(regmap, &sdev->dev);
- return of_platform_populate(root, NULL, NULL, &sdev->dev);
- }
- static void pmic_spmi_remove(struct spmi_device *sdev)
- {
- of_platform_depopulate(&sdev->dev);
- }
- MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
- static struct spmi_driver pmic_spmi_driver = {
- .probe = pmic_spmi_probe,
- .remove = pmic_spmi_remove,
- .driver = {
- .name = "pmic-spmi",
- .of_match_table = pmic_spmi_id_table,
- },
- };
- module_spmi_driver(pmic_spmi_driver);
- MODULE_DESCRIPTION("Qualcomm SPMI PMIC driver");
- MODULE_ALIAS("spmi:spmi-pmic");
- MODULE_LICENSE("GPL v2");
- MODULE_AUTHOR("Josh Cartwright <joshc@codeaurora.org>");
- MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>");
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