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742dcd115c
Revision ID registers are available only on devices with Slave IDs that are even, so don't make access to unavailable registers. Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org> [sboyd@codeaurora.org: Consider all slave ids that are even] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
158 lines
4.6 KiB
C
158 lines
4.6 KiB
C
/*
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* Copyright (c) 2014, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/spmi.h>
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#include <linux/regmap.h>
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#include <linux/of_platform.h>
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#define PMIC_REV2 0x101
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#define PMIC_REV3 0x102
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#define PMIC_REV4 0x103
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#define PMIC_TYPE 0x104
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#define PMIC_SUBTYPE 0x105
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#define PMIC_TYPE_VALUE 0x51
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#define COMMON_SUBTYPE 0x00
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#define PM8941_SUBTYPE 0x01
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#define PM8841_SUBTYPE 0x02
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#define PM8019_SUBTYPE 0x03
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#define PM8226_SUBTYPE 0x04
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#define PM8110_SUBTYPE 0x05
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#define PMA8084_SUBTYPE 0x06
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#define PMI8962_SUBTYPE 0x07
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#define PMD9635_SUBTYPE 0x08
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#define PM8994_SUBTYPE 0x09
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#define PMI8994_SUBTYPE 0x0a
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#define PM8916_SUBTYPE 0x0b
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#define PM8004_SUBTYPE 0x0c
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#define PM8909_SUBTYPE 0x0d
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static const struct of_device_id pmic_spmi_id_table[] = {
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{ .compatible = "qcom,spmi-pmic", .data = (void *)COMMON_SUBTYPE },
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{ .compatible = "qcom,pm8941", .data = (void *)PM8941_SUBTYPE },
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{ .compatible = "qcom,pm8841", .data = (void *)PM8841_SUBTYPE },
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{ .compatible = "qcom,pm8019", .data = (void *)PM8019_SUBTYPE },
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{ .compatible = "qcom,pm8226", .data = (void *)PM8226_SUBTYPE },
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{ .compatible = "qcom,pm8110", .data = (void *)PM8110_SUBTYPE },
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{ .compatible = "qcom,pma8084", .data = (void *)PMA8084_SUBTYPE },
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{ .compatible = "qcom,pmi8962", .data = (void *)PMI8962_SUBTYPE },
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{ .compatible = "qcom,pmd9635", .data = (void *)PMD9635_SUBTYPE },
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{ .compatible = "qcom,pm8994", .data = (void *)PM8994_SUBTYPE },
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{ .compatible = "qcom,pmi8994", .data = (void *)PMI8994_SUBTYPE },
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{ .compatible = "qcom,pm8916", .data = (void *)PM8916_SUBTYPE },
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{ .compatible = "qcom,pm8004", .data = (void *)PM8004_SUBTYPE },
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{ .compatible = "qcom,pm8909", .data = (void *)PM8909_SUBTYPE },
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{ }
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};
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static void pmic_spmi_show_revid(struct regmap *map, struct device *dev)
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{
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unsigned int rev2, minor, major, type, subtype;
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const char *name = "unknown";
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int ret, i;
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ret = regmap_read(map, PMIC_TYPE, &type);
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if (ret < 0)
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return;
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if (type != PMIC_TYPE_VALUE)
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return;
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ret = regmap_read(map, PMIC_SUBTYPE, &subtype);
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if (ret < 0)
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return;
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for (i = 0; i < ARRAY_SIZE(pmic_spmi_id_table); i++) {
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if (subtype == (unsigned long)pmic_spmi_id_table[i].data)
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break;
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}
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if (i != ARRAY_SIZE(pmic_spmi_id_table))
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name = pmic_spmi_id_table[i].compatible;
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ret = regmap_read(map, PMIC_REV2, &rev2);
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if (ret < 0)
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return;
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ret = regmap_read(map, PMIC_REV3, &minor);
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if (ret < 0)
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return;
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ret = regmap_read(map, PMIC_REV4, &major);
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if (ret < 0)
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return;
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/*
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* In early versions of PM8941 and PM8226, the major revision number
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* started incrementing from 0 (eg 0 = v1.0, 1 = v2.0).
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* Increment the major revision number here if the chip is an early
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* version of PM8941 or PM8226.
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*/
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if ((subtype == PM8941_SUBTYPE || subtype == PM8226_SUBTYPE) &&
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major < 0x02)
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major++;
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if (subtype == PM8110_SUBTYPE)
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minor = rev2;
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dev_dbg(dev, "%x: %s v%d.%d\n", subtype, name, major, minor);
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}
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static const struct regmap_config spmi_regmap_config = {
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.reg_bits = 16,
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.val_bits = 8,
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.max_register = 0xffff,
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.fast_io = true,
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};
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static int pmic_spmi_probe(struct spmi_device *sdev)
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{
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struct device_node *root = sdev->dev.of_node;
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struct regmap *regmap;
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regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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/* Only the first slave id for a PMIC contains this information */
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if (sdev->usid % 2 == 0)
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pmic_spmi_show_revid(regmap, &sdev->dev);
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return of_platform_populate(root, NULL, NULL, &sdev->dev);
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}
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static void pmic_spmi_remove(struct spmi_device *sdev)
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{
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of_platform_depopulate(&sdev->dev);
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}
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MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
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static struct spmi_driver pmic_spmi_driver = {
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.probe = pmic_spmi_probe,
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.remove = pmic_spmi_remove,
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.driver = {
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.name = "pmic-spmi",
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.of_match_table = pmic_spmi_id_table,
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},
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};
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module_spmi_driver(pmic_spmi_driver);
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MODULE_DESCRIPTION("Qualcomm SPMI PMIC driver");
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MODULE_ALIAS("spmi:spmi-pmic");
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Josh Cartwright <joshc@codeaurora.org>");
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MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>");
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