diff options
author | Pandith N <pandith.n@intel.com> | 2023-02-16 21:36:08 +0300 |
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committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2023-03-06 18:10:46 +0300 |
commit | 9409d8cf78d9c5471cfd229e652f12050c6dbbde (patch) | |
tree | e57ec2418b8d426019272d34e128bbca418c9fff /drivers/gpio/gpio-elkhartlake.c | |
parent | dc537030647a451bca169209d05b50d2ca3fe4f6 (diff) | |
download | linux-9409d8cf78d9c5471cfd229e652f12050c6dbbde.tar.xz |
gpio: elkhartlake: Introduce Intel Elkhart Lake PSE GPIO
This driver adds support for Intel Elkhart Lake PSE GPIO controller,
using Intel Tangier as a library driver.
Signed-off-by: Pandith N <pandith.n@intel.com>
Co-developed-by: Raag Jadav <raag.jadav@intel.com>
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Co-developed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/gpio/gpio-elkhartlake.c')
-rw-r--r-- | drivers/gpio/gpio-elkhartlake.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-elkhartlake.c b/drivers/gpio/gpio-elkhartlake.c new file mode 100644 index 000000000000..a9c8b16215be --- /dev/null +++ b/drivers/gpio/gpio-elkhartlake.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Intel Elkhart Lake PSE GPIO driver + * + * Copyright (c) 2023 Intel Corporation. + * + * Authors: Pandith N <pandith.n@intel.com> + * Raag Jadav <raag.jadav@intel.com> + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm.h> + +#include "gpio-tangier.h" + +/* Each Intel EHL PSE GPIO Controller has 30 GPIO pins */ +#define EHL_PSE_NGPIO 30 + +static int ehl_gpio_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct tng_gpio *priv; + int irq, ret; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->reg_base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->reg_base)) + return PTR_ERR(priv->reg_base); + + priv->dev = dev; + priv->irq = irq; + + priv->info.base = -1; + priv->info.ngpio = EHL_PSE_NGPIO; + + priv->wake_regs.gwmr = GWMR_EHL; + priv->wake_regs.gwsr = GWSR_EHL; + priv->wake_regs.gsir = GSIR_EHL; + + ret = devm_tng_gpio_probe(dev, priv); + if (ret) + return dev_err_probe(dev, ret, "tng_gpio_probe error\n"); + + platform_set_drvdata(pdev, priv); + return 0; +} + +static int ehl_gpio_suspend(struct device *dev) +{ + return tng_gpio_suspend(dev); +} + +static int ehl_gpio_resume(struct device *dev) +{ + return tng_gpio_resume(dev); +} + +static DEFINE_SIMPLE_DEV_PM_OPS(ehl_gpio_pm_ops, ehl_gpio_suspend, ehl_gpio_resume); + +static const struct platform_device_id ehl_gpio_ids[] = { + { "gpio-elkhartlake" }, + { } +}; +MODULE_DEVICE_TABLE(platform, ehl_gpio_ids); + +static struct platform_driver ehl_gpio_driver = { + .driver = { + .name = "gpio-elkhartlake", + .pm = pm_sleep_ptr(&ehl_gpio_pm_ops), + }, + .probe = ehl_gpio_probe, + .id_table = ehl_gpio_ids, +}; +module_platform_driver(ehl_gpio_driver); + +MODULE_AUTHOR("Pandith N <pandith.n@intel.com>"); +MODULE_AUTHOR("Raag Jadav <raag.jadav@intel.com>"); +MODULE_DESCRIPTION("Intel Elkhart Lake PSE GPIO driver"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(GPIO_TANGIER); |