2 * Copyright (C) 2014 Free Electrons
3 * Copyright (C) 2014 Atmel
5 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #include <linux/clk.h>
21 #include <linux/mfd/atmel-hlcdc.h>
22 #include <linux/mfd/core.h>
23 #include <linux/module.h>
24 #include <linux/platform_device.h>
25 #include <linux/regmap.h>
27 #define ATMEL_HLCDC_REG_MAX (0x4000 - 0x4)
29 static const struct mfd_cell atmel_hlcdc_cells[] = {
31 .name = "atmel-hlcdc-pwm",
32 .of_compatible = "atmel,hlcdc-pwm",
35 .name = "atmel-hlcdc-dc",
36 .of_compatible = "atmel,hlcdc-display-controller",
40 static const struct regmap_config atmel_hlcdc_regmap_config = {
44 .max_register = ATMEL_HLCDC_REG_MAX,
47 static int atmel_hlcdc_probe(struct platform_device *pdev)
49 struct device *dev = &pdev->dev;
50 struct atmel_hlcdc *hlcdc;
54 hlcdc = devm_kzalloc(dev, sizeof(*hlcdc), GFP_KERNEL);
58 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
59 regs = devm_ioremap_resource(dev, res);
63 hlcdc->irq = platform_get_irq(pdev, 0);
67 hlcdc->periph_clk = devm_clk_get(dev, "periph_clk");
68 if (IS_ERR(hlcdc->periph_clk)) {
69 dev_err(dev, "failed to get peripheral clock\n");
70 return PTR_ERR(hlcdc->periph_clk);
73 hlcdc->sys_clk = devm_clk_get(dev, "sys_clk");
74 if (IS_ERR(hlcdc->sys_clk)) {
75 dev_err(dev, "failed to get system clock\n");
76 return PTR_ERR(hlcdc->sys_clk);
79 hlcdc->slow_clk = devm_clk_get(dev, "slow_clk");
80 if (IS_ERR(hlcdc->slow_clk)) {
81 dev_err(dev, "failed to get slow clock\n");
82 return PTR_ERR(hlcdc->slow_clk);
85 hlcdc->regmap = devm_regmap_init_mmio(dev, regs,
86 &atmel_hlcdc_regmap_config);
87 if (IS_ERR(hlcdc->regmap))
88 return PTR_ERR(hlcdc->regmap);
90 dev_set_drvdata(dev, hlcdc);
92 return mfd_add_devices(dev, -1, atmel_hlcdc_cells,
93 ARRAY_SIZE(atmel_hlcdc_cells),
97 static int atmel_hlcdc_remove(struct platform_device *pdev)
99 mfd_remove_devices(&pdev->dev);
104 static const struct of_device_id atmel_hlcdc_match[] = {
105 { .compatible = "atmel,sama5d3-hlcdc" },
109 static struct platform_driver atmel_hlcdc_driver = {
110 .probe = atmel_hlcdc_probe,
111 .remove = atmel_hlcdc_remove,
113 .name = "atmel-hlcdc",
114 .of_match_table = atmel_hlcdc_match,
117 module_platform_driver(atmel_hlcdc_driver);
119 MODULE_ALIAS("platform:atmel-hlcdc");
120 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
121 MODULE_DESCRIPTION("Atmel HLCDC driver");
122 MODULE_LICENSE("GPL v2");