/* * 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); 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>");