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| 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, 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 | + |
| 58 | +static int ehl_gpio_suspend(struct device *dev) |
| 59 | +{ |
| 60 | + return tng_gpio_suspend(dev); |
| 61 | +} |
| 62 | + |
| 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); |
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