tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 int ehl_gpio_suspend(struct device *dev)
59{
60 return tng_gpio_suspend(dev);
61}
62
63static int ehl_gpio_resume(struct device *dev)
64{
65 return tng_gpio_resume(dev);
66}
67
68static DEFINE_SIMPLE_DEV_PM_OPS(ehl_gpio_pm_ops, ehl_gpio_suspend, ehl_gpio_resume);
69
70static const struct platform_device_id ehl_gpio_ids[] = {
71 { "gpio-elkhartlake" },
72 { }
73};
74MODULE_DEVICE_TABLE(platform, ehl_gpio_ids);
75
76static struct platform_driver ehl_gpio_driver = {
77 .driver = {
78 .name = "gpio-elkhartlake",
79 .pm = pm_sleep_ptr(&ehl_gpio_pm_ops),
80 },
81 .probe = ehl_gpio_probe,
82 .id_table = ehl_gpio_ids,
83};
84module_platform_driver(ehl_gpio_driver);
85
86MODULE_AUTHOR("Pandith N <pandith.n@intel.com>");
87MODULE_AUTHOR("Raag Jadav <raag.jadav@intel.com>");
88MODULE_DESCRIPTION("Intel Elkhart Lake PSE GPIO driver");
89MODULE_LICENSE("GPL");
90MODULE_IMPORT_NS(GPIO_TANGIER);