drivers/gpio/gpio-elkhartlake.c

   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 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);