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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license 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 you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 503 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Enrico Weigelt <info@metux.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2014 Free Electrons
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* Copyright (C) 2014 Atmel
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*
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* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
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*/
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#include <linux/clk.h>
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#include <linux/iopoll.h>
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#include <linux/mfd/atmel-hlcdc.h>
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#include <linux/mfd/core.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#define ATMEL_HLCDC_REG_MAX (0x4000 - 0x4)
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struct atmel_hlcdc_regmap {
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void __iomem *regs;
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};
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static const struct mfd_cell atmel_hlcdc_cells[] = {
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{
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.name = "atmel-hlcdc-pwm",
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.of_compatible = "atmel,hlcdc-pwm",
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},
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{
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.name = "atmel-hlcdc-dc",
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.of_compatible = "atmel,hlcdc-display-controller",
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},
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};
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static int regmap_atmel_hlcdc_reg_write(void *context, unsigned int reg,
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unsigned int val)
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{
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struct atmel_hlcdc_regmap *hregmap = context;
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if (reg <= ATMEL_HLCDC_DIS) {
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u32 status;
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readl_poll_timeout_atomic(hregmap->regs + ATMEL_HLCDC_SR,
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status, !(status & ATMEL_HLCDC_SIP),
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1, 100);
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}
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writel(val, hregmap->regs + reg);
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return 0;
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}
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static int regmap_atmel_hlcdc_reg_read(void *context, unsigned int reg,
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unsigned int *val)
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{
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struct atmel_hlcdc_regmap *hregmap = context;
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*val = readl(hregmap->regs + reg);
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return 0;
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}
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static const struct regmap_config atmel_hlcdc_regmap_config = {
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.reg_bits = 32,
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.val_bits = 32,
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.reg_stride = 4,
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.max_register = ATMEL_HLCDC_REG_MAX,
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.reg_write = regmap_atmel_hlcdc_reg_write,
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.reg_read = regmap_atmel_hlcdc_reg_read,
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.fast_io = true,
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};
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static int atmel_hlcdc_probe(struct platform_device *pdev)
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{
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struct atmel_hlcdc_regmap *hregmap;
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struct device *dev = &pdev->dev;
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struct atmel_hlcdc *hlcdc;
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struct resource *res;
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hregmap = devm_kzalloc(dev, sizeof(*hregmap), GFP_KERNEL);
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if (!hregmap)
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return -ENOMEM;
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hlcdc = devm_kzalloc(dev, sizeof(*hlcdc), GFP_KERNEL);
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if (!hlcdc)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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hregmap->regs = devm_ioremap_resource(dev, res);
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if (IS_ERR(hregmap->regs))
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return PTR_ERR(hregmap->regs);
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hlcdc->irq = platform_get_irq(pdev, 0);
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if (hlcdc->irq < 0)
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return hlcdc->irq;
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hlcdc->periph_clk = devm_clk_get(dev, "periph_clk");
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if (IS_ERR(hlcdc->periph_clk)) {
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dev_err(dev, "failed to get peripheral clock\n");
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return PTR_ERR(hlcdc->periph_clk);
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}
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hlcdc->sys_clk = devm_clk_get(dev, "sys_clk");
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if (IS_ERR(hlcdc->sys_clk)) {
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dev_err(dev, "failed to get system clock\n");
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return PTR_ERR(hlcdc->sys_clk);
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}
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hlcdc->slow_clk = devm_clk_get(dev, "slow_clk");
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if (IS_ERR(hlcdc->slow_clk)) {
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dev_err(dev, "failed to get slow clock\n");
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return PTR_ERR(hlcdc->slow_clk);
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}
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hlcdc->regmap = devm_regmap_init(dev, NULL, hregmap,
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&atmel_hlcdc_regmap_config);
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if (IS_ERR(hlcdc->regmap))
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return PTR_ERR(hlcdc->regmap);
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dev_set_drvdata(dev, hlcdc);
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return devm_mfd_add_devices(dev, -1, atmel_hlcdc_cells,
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ARRAY_SIZE(atmel_hlcdc_cells),
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NULL, 0, NULL);
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}
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static const struct of_device_id atmel_hlcdc_match[] = {
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{ .compatible = "atmel,at91sam9n12-hlcdc" },
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{ .compatible = "atmel,at91sam9x5-hlcdc" },
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{ .compatible = "atmel,sama5d2-hlcdc" },
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{ .compatible = "atmel,sama5d3-hlcdc" },
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{ .compatible = "atmel,sama5d4-hlcdc" },
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{ .compatible = "microchip,sam9x60-hlcdc" },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, atmel_hlcdc_match);
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static struct platform_driver atmel_hlcdc_driver = {
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.probe = atmel_hlcdc_probe,
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.driver = {
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.name = "atmel-hlcdc",
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.of_match_table = atmel_hlcdc_match,
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},
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};
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module_platform_driver(atmel_hlcdc_driver);
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MODULE_ALIAS("platform:atmel-hlcdc");
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MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
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MODULE_DESCRIPTION("Atmel HLCDC driver");
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MODULE_LICENSE("GPL v2");
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