From patchwork Thu Feb 16 13:23:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raag Jadav X-Patchwork-Id: 654271 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C45BDC636CC for ; Thu, 16 Feb 2023 13:25:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230171AbjBPNZQ (ORCPT ); Thu, 16 Feb 2023 08:25:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229506AbjBPNZO (ORCPT ); Thu, 16 Feb 2023 08:25:14 -0500 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 34E8D54561; Thu, 16 Feb 2023 05:25:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1676553913; x=1708089913; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=2H++iGRfR09wbs4iqdkBPck8cSAllR7ohEnhgO/4WCI=; b=lpIrJscX4Fac4jxOk4Mb8rNmUvC0xRlwTP0t/s4jqwhz87KS6hfy1hTS qIDdjNv3oyEH+iBfN6Bj+yf+KQ1GSW5n2o4Ifm3NqbY8opGSMLIzmWIYH HEk2Z9HXch39oqcMaX9L5M6/+3+y6AUmynwnAxIbsL1L8+8Ft5P+45hfd HWP7oQ+UU+cZoy/S8rYHd2VFCNBQNS7OhIl8jYE61WwqKpMBP14Wh6ev9 Af2gBFhny7YpwLo2KYVkdvkI665hGHGZImld3eQQgD1uZith97S4Vab1O DH3bVxMYTyGbOqPvtgdIZ0MUIgwQhsYHT+UnXuVPwKB0/eE049e9gjatm Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10623"; a="331711609" X-IronPort-AV: E=Sophos;i="5.97,302,1669104000"; d="scan'208";a="331711609" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Feb 2023 05:25:11 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10623"; a="999033087" X-IronPort-AV: E=Sophos;i="5.97,302,1669104000"; d="scan'208";a="999033087" Received: from inesxmail01.iind.intel.com ([10.223.154.20]) by fmsmga005.fm.intel.com with ESMTP; 16 Feb 2023 05:25:08 -0800 Received: from inlubt0316.iind.intel.com (inlubt0316.iind.intel.com [10.191.20.213]) by inesxmail01.iind.intel.com (Postfix) with ESMTP id 095DE1A9F6; Thu, 16 Feb 2023 18:55:08 +0530 (IST) Received: by inlubt0316.iind.intel.com (Postfix, from userid 12101951) id 061B9162; Thu, 16 Feb 2023 18:55:08 +0530 (IST) From: Raag Jadav To: linus.walleij@linaro.org, brgl@bgdev.pl, andriy.shevchenko@linux.intel.com Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, mallikarjunappa.sangannavar@intel.com, pandith.n@intel.com, Raag Jadav Subject: [PATCH v1 3/3] gpio: elkhartlake: Introduce Elkhart Lake PSE GPIO Date: Thu, 16 Feb 2023 18:53:56 +0530 Message-Id: <20230216132356.29922-4-raag.jadav@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230216132356.29922-1-raag.jadav@intel.com> References: <20230216132356.29922-1-raag.jadav@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Pandith N This driver adds support for Elkhart Lake PSE GPIO controller, using Intel Tangier as a library driver. Signed-off-by: Pandith N Co-developed-by: Raag Jadav Signed-off-by: Raag Jadav --- MAINTAINERS | 1 + drivers/gpio/Kconfig | 12 +++++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-elkhartlake.c | 94 +++++++++++++++++++++++++++++++++ drivers/gpio/gpio-tangier.h | 5 ++ 5 files changed, 113 insertions(+) create mode 100644 drivers/gpio/gpio-elkhartlake.c diff --git a/MAINTAINERS b/MAINTAINERS index 3e9d42b2747d..aec1a2040f32 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10389,6 +10389,7 @@ M: Andy Shevchenko L: linux-gpio@vger.kernel.org S: Supported T: git git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-gpio-intel.git +F: drivers/gpio/gpio-elkhartlake.c F: drivers/gpio/gpio-ich.c F: drivers/gpio/gpio-merrifield.c F: drivers/gpio/gpio-ml-ioh.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 7fc7a2768705..c60066d4cd72 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -242,6 +242,17 @@ config GPIO_DWAPB Say Y or M here to build support for the Synopsys DesignWare APB GPIO block. +config GPIO_ELKHARTLAKE + tristate "Intel Elkhart Lake PSE GPIO support" + depends on (X86 && ACPI) || COMPILE_TEST + select GPIO_TANGIER + help + Select this option to enable GPIO support for Intel Elkhart Lake + PSE GPIO IP. + + To compile this driver as a module, choose M here: the module will + be called gpio-elkhartlake. + config GPIO_EIC_SPRD tristate "Spreadtrum EIC support" depends on ARCH_SPRD || COMPILE_TEST @@ -632,6 +643,7 @@ config GPIO_TANGIER help GPIO support for Intel Tangier and compatible platforms. Currently supported: + - Elkhart Lake - Merrifield If built as a module its name will be gpio-tangier. diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index a6cea9d2c973..8c34d5e39eb8 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -54,6 +54,7 @@ obj-$(CONFIG_GPIO_DAVINCI) += gpio-davinci.o obj-$(CONFIG_GPIO_DLN2) += gpio-dln2.o obj-$(CONFIG_GPIO_DWAPB) += gpio-dwapb.o obj-$(CONFIG_GPIO_EIC_SPRD) += gpio-eic-sprd.o +obj-$(CONFIG_GPIO_ELKHARTLAKE) += gpio-elkhartlake.o obj-$(CONFIG_GPIO_EM) += gpio-em.o obj-$(CONFIG_GPIO_EN7523) += gpio-en7523.o obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o diff --git a/drivers/gpio/gpio-elkhartlake.c b/drivers/gpio/gpio-elkhartlake.c new file mode 100644 index 000000000000..cf728ff35857 --- /dev/null +++ b/drivers/gpio/gpio-elkhartlake.c @@ -0,0 +1,94 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Intel Elkhart Lake PSE GPIO driver + * + * Copyright (c) 2023 Intel Corporation. + * + * Authors: Pandith N + * Raag Jadav + */ + +#include +#include +#include +#include +#include + +#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->ctx = devm_kzalloc(dev, sizeof(*priv->ctx), GFP_KERNEL); + if (!priv->ctx) + 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->chip.base = -1; + priv->chip.ngpio = EHL_PSE_NGPIO; + priv->chip.can_sleep = false; + priv->irq = irq; + + priv->reg.gwmr = GWMR_EHL; + priv->reg.gwsr = GWSR_EHL; + priv->reg.gsir = GSIR_EHL; + + ret = tng_gpio_probe(priv); + if (ret) + return dev_err_probe(dev, ret, "tng_gpio_probe error %d\n", ret); + + 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 "); +MODULE_AUTHOR("Raag Jadav "); +MODULE_DESCRIPTION("Intel Elkhart Lake PSE GPIO driver"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(GPIO_TANGIER); diff --git a/drivers/gpio/gpio-tangier.h b/drivers/gpio/gpio-tangier.h index 414530c60c5a..6390a14ed9de 100644 --- a/drivers/gpio/gpio-tangier.h +++ b/drivers/gpio/gpio-tangier.h @@ -18,6 +18,11 @@ struct device; +/* Elkhart Lake specific wake registers */ +#define GWMR_EHL 0x100 /* Wake mask */ +#define GWSR_EHL 0x118 /* Wake source */ +#define GSIR_EHL 0x130 /* Secure input */ + /* Merrifield specific wake registers */ #define GWMR_MRFLD 0x400 /* Wake mask */ #define GWSR_MRFLD 0x418 /* Wake source */