/*
* 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>");
