106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
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/*
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* PMC driver for the X-Powers' Power Management ICs
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*
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* SUNXI_PMC typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC
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* converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature
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* as well as configurable GPIOs.
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*
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* This driver supports the PMC variants.
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*
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* Copyright (C) 2015 Chen-Yu Tsai
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*
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* Author: Chen-Yu Tsai <wens@csie.org>
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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 as
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* published by the Free Software Foundation.
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*/
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#include <linux/acpi.h>
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#include <linux/err.h>
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#include <linux/mfd/sunxi_pmc.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/of_irq.h>
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static int sunxi_pmc_pmc_probe(struct platform_device *rdev)
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{
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struct sunxi_pmc_dev *sunxi_pmc;
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struct device *dev = &rdev->dev;
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struct platform_device *pdev = rdev;
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struct resource *mem;
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void __iomem *base;
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int ret;
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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base = devm_ioremap_resource(dev, mem);
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if (IS_ERR(base)) {
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return PTR_ERR(base);
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}
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sunxi_pmc = devm_kzalloc(&rdev->dev, sizeof(*sunxi_pmc), GFP_KERNEL);
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if (!sunxi_pmc)
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return -ENOMEM;
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sunxi_pmc->dev = &rdev->dev;
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if (rdev->dev.of_node) {
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sunxi_pmc->irq = of_irq_get(rdev->dev.of_node, 0);
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}
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dev_set_drvdata(&rdev->dev, sunxi_pmc);
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ret = sunxi_pmc_match_device(sunxi_pmc);
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if (ret)
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return ret;
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sunxi_pmc->regmap = devm_regmap_init_mmio(dev, base, sunxi_pmc->regmap_cfg);
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if (IS_ERR(sunxi_pmc->regmap)) {
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ret = PTR_ERR(sunxi_pmc->regmap);
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dev_err(&rdev->dev, "regmap init failed: %d\n", ret);
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return ret;
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}
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return sunxi_pmc_device_probe(sunxi_pmc);
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}
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static int sunxi_pmc_pmc_remove(struct platform_device *rdev)
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{
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struct sunxi_pmc_dev *sunxi_pmc = dev_get_drvdata(&rdev->dev);
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return sunxi_pmc_device_remove(sunxi_pmc);
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}
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static const struct of_device_id sunxi_pmc_pmc_of_match[] = {
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{ .compatible = "x-powers,pmc", .data = (void *)PMC_V1_ID },
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{ },
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};
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MODULE_DEVICE_TABLE(of, sunxi_pmc_pmc_of_match);
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static struct platform_driver sunxi_pmc_pmc_driver = {
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.driver = {
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.name = "sunxi_pmc",
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.of_match_table = of_match_ptr(sunxi_pmc_pmc_of_match),
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},
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.probe = sunxi_pmc_pmc_probe,
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.remove = sunxi_pmc_pmc_remove,
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};
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static int __init sunxi_pmc_pmc_init(void)
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{
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return platform_driver_register(&sunxi_pmc_pmc_driver);
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}
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static void __exit sunxi_pmc_pmc_exit(void)
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{
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platform_driver_unregister(&sunxi_pmc_pmc_driver);
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}
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subsys_initcall(sunxi_pmc_pmc_init);
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module_exit(sunxi_pmc_pmc_exit);
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MODULE_DESCRIPTION("PMIC MFD SUNXI PMC driver for SUNXI_PMC");
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MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>");
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MODULE_LICENSE("GPL v2");
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