1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Intel Elkhart Lake PSE GPIO driver
4 *
5 * Copyright (c) 2023 Intel Corporation.
6 *
7 * Authors: Pandith N <pandith.n@intel.com>
8 *          Raag Jadav <raag.jadav@intel.com>
9 */
10
11#include <linux/device.h>
12#include <linux/err.h>
13#include <linux/module.h>
14#include <linux/platform_device.h>
15#include <linux/pm.h>
16
17#include "gpio-tangier.h"
18
19/* Each Intel EHL PSE GPIO Controller has 30 GPIO pins */
20#define EHL_PSE_NGPIO		30
21
22static int ehl_gpio_probe(struct platform_device *pdev)
23{
24	struct device *dev = &pdev->dev;
25	struct tng_gpio *priv;
26	int irq, ret;
27
28	irq = platform_get_irq(pdev, 0);
29	if (irq < 0)
30		return irq;
31
32	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
33	if (!priv)
34		return -ENOMEM;
35
36	priv->reg_base = devm_platform_ioremap_resource(pdev, 0);
37	if (IS_ERR(priv->reg_base))
38		return PTR_ERR(priv->reg_base);
39
40	priv->dev = dev;
41	priv->irq = irq;
42
43	priv->info.base = -1;
44	priv->info.ngpio = EHL_PSE_NGPIO;
45
46	priv->wake_regs.gwmr = GWMR_EHL;
47	priv->wake_regs.gwsr = GWSR_EHL;
48	priv->wake_regs.gsir = GSIR_EHL;
49
50	ret = devm_tng_gpio_probe(dev, priv);
51	if (ret)
52		return dev_err_probe(dev, ret, "tng_gpio_probe error\n");
53
54	platform_set_drvdata(pdev, priv);
55	return 0;
56}
57
58static const struct platform_device_id ehl_gpio_ids[] = {
59	{ "gpio-elkhartlake" },
60	{ }
61};
62MODULE_DEVICE_TABLE(platform, ehl_gpio_ids);
63
64static struct platform_driver ehl_gpio_driver = {
65	.driver	= {
66		.name	= "gpio-elkhartlake",
67		.pm	= pm_sleep_ptr(&tng_gpio_pm_ops),
68	},
69	.probe		= ehl_gpio_probe,
70	.id_table	= ehl_gpio_ids,
71};
72module_platform_driver(ehl_gpio_driver);
73
74MODULE_AUTHOR("Pandith N <pandith.n@intel.com>");
75MODULE_AUTHOR("Raag Jadav <raag.jadav@intel.com>");
76MODULE_DESCRIPTION("Intel Elkhart Lake PSE GPIO driver");
77MODULE_LICENSE("GPL");
78MODULE_IMPORT_NS(GPIO_TANGIER);
79