cregit-Linux how code gets into the kernel

Release 4.7 drivers/mfd/qcom-spmi-pmic.c

Directory: drivers/mfd
/*
 * 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); }

Contributors

PersonTokensPropCommitsCommitProp
ivan t. ivanovivan t. ivanov239100.00%1100.00%
Total239100.00%1100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
josh cartwrightjosh cartwright6575.58%133.33%
ivan t. ivanovivan t. ivanov2124.42%266.67%
Total86100.00%3100.00%


static void pmic_spmi_remove(struct spmi_device *sdev) { of_platform_depopulate(&sdev->dev); }

Contributors

PersonTokensPropCommitsCommitProp
josh cartwrightjosh cartwright19100.00%1100.00%
Total19100.00%1100.00%

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>");

Overall Contributors

PersonTokensPropCommitsCommitProp
ivan t. ivanovivan t. ivanov57574.48%266.67%
josh cartwrightjosh cartwright19725.52%133.33%
Total772100.00%3100.00%
Directory: drivers/mfd
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