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
ehl_gpio_probe(struct platform_device * pdev)22 static 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
ehl_gpio_suspend(struct device * dev)58 static int ehl_gpio_suspend(struct device *dev)
59 {
60 return tng_gpio_suspend(dev);
61 }
62
ehl_gpio_resume(struct device * dev)63 static int ehl_gpio_resume(struct device *dev)
64 {
65 return tng_gpio_resume(dev);
66 }
67
68 static DEFINE_SIMPLE_DEV_PM_OPS(ehl_gpio_pm_ops, ehl_gpio_suspend, ehl_gpio_resume);
69
70 static const struct platform_device_id ehl_gpio_ids[] = {
71 { "gpio-elkhartlake" },
72 { }
73 };
74 MODULE_DEVICE_TABLE(platform, ehl_gpio_ids);
75
76 static 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 };
84 module_platform_driver(ehl_gpio_driver);
85
86 MODULE_AUTHOR("Pandith N <pandith.n@intel.com>");
87 MODULE_AUTHOR("Raag Jadav <raag.jadav@intel.com>");
88 MODULE_DESCRIPTION("Intel Elkhart Lake PSE GPIO driver");
89 MODULE_LICENSE("GPL");
90 MODULE_IMPORT_NS(GPIO_TANGIER);
91