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 | |
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, size: sizeof(*priv), GFP_KERNEL); |
33 | if (!priv) |
34 | return -ENOMEM; |
35 | |
36 | priv->reg_base = devm_platform_ioremap_resource(pdev, index: 0); |
37 | if (IS_ERR(ptr: priv->reg_base)) |
38 | return PTR_ERR(ptr: 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, gpio: priv); |
51 | if (ret) |
52 | return dev_err_probe(dev, err: ret, fmt: "tng_gpio_probe error\n" ); |
53 | |
54 | platform_set_drvdata(pdev, data: priv); |
55 | return 0; |
56 | } |
57 | |
58 | static const struct platform_device_id ehl_gpio_ids[] = { |
59 | { "gpio-elkhartlake" }, |
60 | { } |
61 | }; |
62 | MODULE_DEVICE_TABLE(platform, ehl_gpio_ids); |
63 | |
64 | static 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 | }; |
72 | module_platform_driver(ehl_gpio_driver); |
73 | |
74 | MODULE_AUTHOR("Pandith N <pandith.n@intel.com>" ); |
75 | MODULE_AUTHOR("Raag Jadav <raag.jadav@intel.com>" ); |
76 | MODULE_DESCRIPTION("Intel Elkhart Lake PSE GPIO driver" ); |
77 | MODULE_LICENSE("GPL" ); |
78 | MODULE_IMPORT_NS(GPIO_TANGIER); |
79 | |