From patchwork Thu Jun 4 21:10:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 199524 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E9F0AC433DF for ; Thu, 4 Jun 2020 21:12:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC0932067B for ; Thu, 4 Jun 2020 21:12:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=walle.cc header.i=@walle.cc header.b="S+ZXBXto" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728109AbgFDVLz (ORCPT ); Thu, 4 Jun 2020 17:11:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726594AbgFDVLU (ORCPT ); Thu, 4 Jun 2020 17:11:20 -0400 Received: from ssl.serverraum.org (ssl.serverraum.org [IPv6:2a01:4f8:151:8464::1:2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A93BFC08C5C0; Thu, 4 Jun 2020 14:11:19 -0700 (PDT) Received: from apollo.fritz.box (unknown [IPv6:2a02:810c:c200:2e91:6257:18ff:fec4:ca34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id 17B3B22F9C; Thu, 4 Jun 2020 23:11:17 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1591305077; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=5ML389VIPDlcqH0is2ISEMU1iStQnOv84I3nRoWZJ5A=; b=S+ZXBXtoM3kYZ7moTsi46zITtMNggn+W1U0TSdd070MMRSTlFNA71pv5xloD9NA8AbCwdq y3M9J8EFMeV2Rf+sgx5tkcJTEXLnGXVZe6kAYE3EjuLFOvQdVtNO+myDjnFez1cu0ZGfij QCP/XsZCfhu1yyZJ/YR/TP7Vrk7em4k= From: Michael Walle To: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Linus Walleij , Bartosz Golaszewski , Rob Herring , Jean Delvare , Guenter Roeck , Lee Jones , Thierry Reding , =?utf-8?q?Uwe_Kleine-K?= =?utf-8?b?w7ZuaWc=?= , Wim Van Sebroeck , Shawn Guo , Li Yang , Thomas Gleixner , Jason Cooper , Marc Zyngier , Mark Brown , Greg Kroah-Hartman , Andy Shevchenko , Michael Walle Subject: [PATCH v4 02/11] mfd: Add support for Kontron sl28cpld management controller Date: Thu, 4 Jun 2020 23:10:30 +0200 Message-Id: <20200604211039.12689-3-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200604211039.12689-1-michael@walle.cc> References: <20200604211039.12689-1-michael@walle.cc> MIME-Version: 1.0 X-Spam: Yes Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add the core support for the board management controller found on the SMARC-sAL28 board. It consists of the following functions: - watchdog - GPIO controller - PWM controller - fan sensor - interrupt controller At the moment, this controller is used on the Kontron SMARC-sAL28 board. Please note that the MFD driver is defined as bool in the Kconfig because the next patch will add interrupt support. Signed-off-by: Michael Walle --- drivers/mfd/Kconfig | 19 ++++++++++ drivers/mfd/Makefile | 2 ++ drivers/mfd/sl28cpld.c | 79 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 100 insertions(+) create mode 100644 drivers/mfd/sl28cpld.c diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 4f8b73d92df3..5c0cd514d197 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2109,5 +2109,24 @@ config SGI_MFD_IOC3 If you have an SGI Origin, Octane, or a PCI IOC3 card, then say Y. Otherwise say N. +config MFD_SL28CPLD + bool "Kontron sl28 core driver" + depends on I2C=y + depends on OF + select REGMAP_I2C + select MFD_CORE + help + This option enables support for the board management controller + found on the Kontron sl28 CPLD. You have to select individual + functions, such as watchdog, GPIO, etc, under the corresponding menus + in order to enable them. + + Currently supported boards are: + + Kontron SMARC-sAL28 + + To compile this driver as a module, choose M here: the module will be + called sl28cpld. + endmenu endif diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 9367a92f795a..be59fb40aa28 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -264,3 +264,5 @@ obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-bd718x7.o obj-$(CONFIG_MFD_STMFX) += stmfx.o obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o + +obj-$(CONFIG_MFD_SL28CPLD) += sl28cpld.o diff --git a/drivers/mfd/sl28cpld.c b/drivers/mfd/sl28cpld.c new file mode 100644 index 000000000000..a23194bb6efa --- /dev/null +++ b/drivers/mfd/sl28cpld.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * MFD core for the sl28cpld. + * + * Copyright 2019 Kontron Europe GmbH + */ + +#include +#include +#include +#include +#include +#include +#include + +#define SL28CPLD_VERSION 0x03 +#define SL28CPLD_MIN_REQ_VERSION 14 + +struct sl28cpld { + struct device *dev; + struct regmap *regmap; +}; + +static const struct regmap_config sl28cpld_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .reg_stride = 1, +}; + +static int sl28cpld_probe(struct i2c_client *i2c) +{ + struct sl28cpld *sl28cpld; + struct device *dev = &i2c->dev; + unsigned int cpld_version; + int ret; + + sl28cpld = devm_kzalloc(dev, sizeof(*sl28cpld), GFP_KERNEL); + if (!sl28cpld) + return -ENOMEM; + + sl28cpld->regmap = devm_regmap_init_i2c(i2c, &sl28cpld_regmap_config); + if (IS_ERR(sl28cpld->regmap)) + return PTR_ERR(sl28cpld->regmap); + + ret = regmap_read(sl28cpld->regmap, SL28CPLD_VERSION, &cpld_version); + if (ret) + return ret; + + if (cpld_version < SL28CPLD_MIN_REQ_VERSION) { + dev_err(dev, "unsupported CPLD version %d\n", cpld_version); + return -ENODEV; + } + + sl28cpld->dev = dev; + i2c_set_clientdata(i2c, sl28cpld); + + dev_info(dev, "successfully probed. CPLD version %d\n", cpld_version); + + return devm_of_platform_populate(&i2c->dev); +} + +static const struct of_device_id sl28cpld_of_match[] = { + { .compatible = "kontron,sl28cpld-r1", }, + {} +}; +MODULE_DEVICE_TABLE(of, sl28cpld_of_match); + +static struct i2c_driver sl28cpld_driver = { + .probe_new = sl28cpld_probe, + .driver = { + .name = "sl28cpld", + .of_match_table = of_match_ptr(sl28cpld_of_match), + }, +}; +module_i2c_driver(sl28cpld_driver); + +MODULE_DESCRIPTION("sl28cpld MFD Core Driver"); +MODULE_AUTHOR("Michael Walle "); +MODULE_LICENSE("GPL"); From patchwork Thu Jun 4 21:10:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 199525 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A27E7C433E0 for ; Thu, 4 Jun 2020 21:11:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 703EA2067B for ; Thu, 4 Jun 2020 21:11:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=walle.cc header.i=@walle.cc header.b="Pi5ca1oG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726625AbgFDVLw (ORCPT ); Thu, 4 Jun 2020 17:11:52 -0400 Received: from ssl.serverraum.org ([176.9.125.105]:46709 "EHLO ssl.serverraum.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726735AbgFDVLZ (ORCPT ); Thu, 4 Jun 2020 17:11:25 -0400 Received: from apollo.fritz.box (unknown [IPv6:2a02:810c:c200:2e91:6257:18ff:fec4:ca34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id 7675A22FAD; Thu, 4 Jun 2020 23:11:18 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1591305079; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QU+bTcAKUTqqXjq3JgZVRspAXfOm566EIrCaYeDC/yo=; b=Pi5ca1oGAOJz5riqGvtAm81NQoE1UK7HFyMu+fxjhY7qQcizbJSCoAqnYPMhp6DOEIBfeJ MuS8CXQnrXBJMI0XXn2ooz8UWpIR45hpwHeyhskT+NI1lsACItfjR8YrXhB4r47iGbV1e7 /1tVoZxxpgGmbDuGIWp3oxgP05OItMg= From: Michael Walle To: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Linus Walleij , Bartosz Golaszewski , Rob Herring , Jean Delvare , Guenter Roeck , Lee Jones , Thierry Reding , =?utf-8?q?Uwe_Kleine-K?= =?utf-8?b?w7ZuaWc=?= , Wim Van Sebroeck , Shawn Guo , Li Yang , Thomas Gleixner , Jason Cooper , Marc Zyngier , Mark Brown , Greg Kroah-Hartman , Andy Shevchenko , Michael Walle Subject: [PATCH v4 04/11] watchdog: add support for sl28cpld watchdog Date: Thu, 4 Jun 2020 23:10:32 +0200 Message-Id: <20200604211039.12689-5-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200604211039.12689-1-michael@walle.cc> References: <20200604211039.12689-1-michael@walle.cc> MIME-Version: 1.0 X-Spam: Yes Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add support for the watchdog of the sl28cpld board management controller. This is part of a multi-function device driver. Signed-off-by: Michael Walle Acked-by: Guenter Roeck --- drivers/watchdog/Kconfig | 11 ++ drivers/watchdog/Makefile | 1 + drivers/watchdog/sl28cpld_wdt.c | 231 ++++++++++++++++++++++++++++++++ 3 files changed, 243 insertions(+) create mode 100644 drivers/watchdog/sl28cpld_wdt.c diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 55b910c453da..2c7b0f10151e 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -340,6 +340,17 @@ config MLX_WDT To compile this driver as a module, choose M here: the module will be called mlx-wdt. +config SL28CPLD_WATCHDOG + tristate "Kontron sl28 watchdog" + depends on MFD_SL28CPLD + select WATCHDOG_CORE + help + Say Y here to include support for the watchdog timer + on the Kontron sl28 CPLD. + + To compile this driver as a module, choose M here: the + module will be called sl28cpld_wdt. + # ALPHA Architecture # ARM Architecture diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 97bed1d3d97c..aa6e41126901 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -225,3 +225,4 @@ obj-$(CONFIG_MENF21BMC_WATCHDOG) += menf21bmc_wdt.o obj-$(CONFIG_MENZ069_WATCHDOG) += menz69_wdt.o obj-$(CONFIG_RAVE_SP_WATCHDOG) += rave-sp-wdt.o obj-$(CONFIG_STPMIC1_WATCHDOG) += stpmic1_wdt.o +obj-$(CONFIG_SL28CPLD_WATCHDOG) += sl28cpld_wdt.o diff --git a/drivers/watchdog/sl28cpld_wdt.c b/drivers/watchdog/sl28cpld_wdt.c new file mode 100644 index 000000000000..6c9518dc454a --- /dev/null +++ b/drivers/watchdog/sl28cpld_wdt.c @@ -0,0 +1,231 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * sl28cpld watchdog driver. + * + * Copyright 2019 Kontron Europe GmbH + */ + +#include +#include +#include +#include +#include +#include + +/* + * Watchdog timer block registers. + */ +#define WDT_CTRL 0x00 +#define WDT_CTRL_EN BIT(0) +#define WDT_CTRL_LOCK BIT(2) +#define WDT_CTRL_ASSERT_SYS_RESET BIT(6) +#define WDT_CTRL_ASSERT_WDT_TIMEOUT BIT(7) +#define WDT_TIMEOUT 0x01 +#define WDT_KICK 0x02 +#define WDT_KICK_VALUE 0x6b +#define WDT_COUNT 0x03 + +#define WDT_DEFAULT_TIMEOUT 10 + +static bool nowayout = WATCHDOG_NOWAYOUT; +module_param(nowayout, bool, 0); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); + +static int timeout; +module_param(timeout, int, 0); +MODULE_PARM_DESC(timeout, "Initial watchdog timeout in seconds"); + +struct sl28cpld_wdt { + struct watchdog_device wdd; + struct regmap *regmap; + u32 offset; + bool assert_wdt_timeout; +}; + +static int sl28cpld_wdt_ping(struct watchdog_device *wdd) +{ + struct sl28cpld_wdt *wdt = watchdog_get_drvdata(wdd); + + return regmap_write(wdt->regmap, wdt->offset + WDT_KICK, + WDT_KICK_VALUE); +} + +static int sl28cpld_wdt_start(struct watchdog_device *wdd) +{ + struct sl28cpld_wdt *wdt = watchdog_get_drvdata(wdd); + unsigned int val; + + val = WDT_CTRL_EN | WDT_CTRL_ASSERT_SYS_RESET; + if (wdt->assert_wdt_timeout) + val |= WDT_CTRL_ASSERT_WDT_TIMEOUT; + if (nowayout) + val |= WDT_CTRL_LOCK; + + return regmap_update_bits(wdt->regmap, wdt->offset + WDT_CTRL, + val, val); +} + +static int sl28cpld_wdt_stop(struct watchdog_device *wdd) +{ + struct sl28cpld_wdt *wdt = watchdog_get_drvdata(wdd); + + return regmap_update_bits(wdt->regmap, wdt->offset + WDT_CTRL, + WDT_CTRL_EN, 0); +} + +static unsigned int sl28cpld_wdt_get_timeleft(struct watchdog_device *wdd) +{ + struct sl28cpld_wdt *wdt = watchdog_get_drvdata(wdd); + unsigned int val; + int ret; + + ret = regmap_read(wdt->regmap, wdt->offset + WDT_COUNT, &val); + + return (ret < 0) ? 0 : val; +} + +static int sl28cpld_wdt_set_timeout(struct watchdog_device *wdd, + unsigned int timeout) +{ + struct sl28cpld_wdt *wdt = watchdog_get_drvdata(wdd); + int ret; + + ret = regmap_write(wdt->regmap, wdt->offset + WDT_TIMEOUT, timeout); + if (!ret) + wdd->timeout = timeout; + + return ret; +} + +static const struct watchdog_info sl28cpld_wdt_info = { + .options = WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING, + .identity = "sl28cpld watchdog", +}; + +static struct watchdog_ops sl28cpld_wdt_ops = { + .owner = THIS_MODULE, + .start = sl28cpld_wdt_start, + .stop = sl28cpld_wdt_stop, + .ping = sl28cpld_wdt_ping, + .set_timeout = sl28cpld_wdt_set_timeout, + .get_timeleft = sl28cpld_wdt_get_timeleft, +}; + +static int sl28cpld_wdt_probe(struct platform_device *pdev) +{ + struct watchdog_device *wdd; + struct sl28cpld_wdt *wdt; + unsigned int status; + unsigned int val; + int ret; + + if (!pdev->dev.parent) + return -ENODEV; + + wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL); + if (!wdt) + return -ENOMEM; + + wdt->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!wdt->regmap) + return -ENODEV; + + ret = device_property_read_u32(&pdev->dev, "reg", &wdt->offset); + if (ret) + return -EINVAL; + + wdt->assert_wdt_timeout = device_property_read_bool(&pdev->dev, + "kontron,assert-wdt-timeout-pin"); + + /* initialize struct watchdog_device */ + wdd = &wdt->wdd; + wdd->parent = &pdev->dev; + wdd->info = &sl28cpld_wdt_info; + wdd->ops = &sl28cpld_wdt_ops; + wdd->min_timeout = 1; + wdd->max_timeout = 255; + + watchdog_set_drvdata(wdd, wdt); + watchdog_stop_on_reboot(wdd); + + /* + * Read the status early, in case of an error, we haven't modified the + * hardware. + */ + ret = regmap_read(wdt->regmap, wdt->offset + WDT_CTRL, &status); + if (ret < 0) + return ret; + + /* + * Initial timeout value, may be overwritten by device tree or module + * parmeter in watchdog_init_timeout(). + * + * Reading a zero here means that either the hardware has a default + * value of zero (which is very unlikely and definitely a hardware + * bug) or the bootloader set it to zero. In any case, we handle + * this case gracefully and set out own timeout. + */ + ret = regmap_read(wdt->regmap, wdt->offset + WDT_TIMEOUT, &val); + if (ret < 0) + return ret; + + if (val) + wdd->timeout = val; + else + wdd->timeout = WDT_DEFAULT_TIMEOUT; + + watchdog_init_timeout(wdd, timeout, &pdev->dev); + sl28cpld_wdt_set_timeout(wdd, wdd->timeout); + + /* if the watchdog is locked, we set nowayout */ + if (status & WDT_CTRL_LOCK) + nowayout = true; + watchdog_set_nowayout(wdd, nowayout); + + /* + * If watchdog is already running, keep it enabled, but make + * sure its mode is set correctly. + */ + if (status & WDT_CTRL_EN) { + sl28cpld_wdt_start(wdd); + set_bit(WDOG_HW_RUNNING, &wdd->status); + } + + ret = devm_watchdog_register_device(&pdev->dev, wdd); + if (ret < 0) { + dev_err(&pdev->dev, "failed to register watchdog device\n"); + return ret; + } + + dev_info(&pdev->dev, "initial timeout %d sec%s\n", + wdd->timeout, nowayout ? ", nowayout" : ""); + + return 0; +} + +static const struct of_device_id sl28cpld_wdt_of_match[] = { + { .compatible = "kontron,sl28cpld-wdt" }, + {}, +}; +MODULE_DEVICE_TABLE(of, sl28cpld_wdt_of_match); + +static const struct platform_device_id sl28cpld_wdt_id_table[] = { + { "sl28cpld-wdt" }, + {}, +}; +MODULE_DEVICE_TABLE(platform, sl28cpld_wdt_id_table); + +static struct platform_driver sl28cpld_wdt_driver = { + .probe = sl28cpld_wdt_probe, + .id_table = sl28cpld_wdt_id_table, + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = sl28cpld_wdt_of_match, + }, +}; +module_platform_driver(sl28cpld_wdt_driver); + +MODULE_DESCRIPTION("sl28cpld Watchdog Driver"); +MODULE_AUTHOR("Michael Walle "); +MODULE_LICENSE("GPL"); From patchwork Thu Jun 4 21:10:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 199523 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 93895C433E1 for ; Thu, 4 Jun 2020 21:12:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6BAD12067B for ; Thu, 4 Jun 2020 21:12:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=walle.cc header.i=@walle.cc header.b="nGLZ5abc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728014AbgFDVLw (ORCPT ); Thu, 4 Jun 2020 17:11:52 -0400 Received: from ssl.serverraum.org ([176.9.125.105]:37193 "EHLO ssl.serverraum.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726819AbgFDVLZ (ORCPT ); Thu, 4 Jun 2020 17:11:25 -0400 Received: from apollo.fritz.box (unknown [IPv6:2a02:810c:c200:2e91:6257:18ff:fec4:ca34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id EE2E222FE3; Thu, 4 Jun 2020 23:11:21 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1591305082; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=thRMUD35mQ2CLp7g40OFx33tgegHp5PmiaEGuFoICU4=; b=nGLZ5abcsYGdDGICEhta44xmh0XdHbzE9ufB5L86JS8J0xdMYHDGt/w2zf+SASEq60oiJd Lv9YKcUjTzEWnpFiOYB0F1zFfxlViz261bZxf1PlfbQdHr35uylL0gFvk7bEU5EkbaSpVs QeHlzo0gCwVGV6PPdRpnZYd/Jzzefgw= From: Michael Walle To: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Linus Walleij , Bartosz Golaszewski , Rob Herring , Jean Delvare , Guenter Roeck , Lee Jones , Thierry Reding , =?utf-8?q?Uwe_Kleine-K?= =?utf-8?b?w7ZuaWc=?= , Wim Van Sebroeck , Shawn Guo , Li Yang , Thomas Gleixner , Jason Cooper , Marc Zyngier , Mark Brown , Greg Kroah-Hartman , Andy Shevchenko , Michael Walle Subject: [PATCH v4 06/11] gpio: add support for the sl28cpld GPIO controller Date: Thu, 4 Jun 2020 23:10:34 +0200 Message-Id: <20200604211039.12689-7-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200604211039.12689-1-michael@walle.cc> References: <20200604211039.12689-1-michael@walle.cc> MIME-Version: 1.0 X-Spam: Yes Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add support for the GPIO controller of the sl28 board management controller. This driver is part of a multi-function device. A controller has 8 lines. There are three different flavors: full-featured GPIO with interrupt support, input-only and output-only. Signed-off-by: Michael Walle --- drivers/gpio/Kconfig | 11 +++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-sl28cpld.c | 180 +++++++++++++++++++++++++++++++++++ 3 files changed, 192 insertions(+) create mode 100644 drivers/gpio/gpio-sl28cpld.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index bcacd9c74aa8..a325d2d619a8 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -1215,6 +1215,17 @@ config GPIO_RC5T583 This driver provides the support for driving/reading the gpio pins of RC5T583 device through standard gpio library. +config GPIO_SL28CPLD + tristate "Kontron sl28 GPIO" + depends on MFD_SL28CPLD + select GPIO_REGMAP + select GPIOLIB_IRQCHIP + help + This enables support for the GPIOs found on the Kontron sl28 CPLD. + + This driver can also be built as a module. If so, the module will be + called gpio-sl28cpld. + config GPIO_STMPE bool "STMPE GPIOs" depends on MFD_STMPE diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 1e4894e0bf0f..152127a9b339 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -130,6 +130,7 @@ obj-$(CONFIG_GPIO_SCH311X) += gpio-sch311x.o obj-$(CONFIG_GPIO_SCH) += gpio-sch.o obj-$(CONFIG_GPIO_SIFIVE) += gpio-sifive.o obj-$(CONFIG_GPIO_SIOX) += gpio-siox.o +obj-$(CONFIG_GPIO_SL28CPLD) += gpio-sl28cpld.o obj-$(CONFIG_GPIO_SODAVILLE) += gpio-sodaville.o obj-$(CONFIG_GPIO_SPEAR_SPICS) += gpio-spear-spics.o obj-$(CONFIG_GPIO_SPRD) += gpio-sprd.o diff --git a/drivers/gpio/gpio-sl28cpld.c b/drivers/gpio/gpio-sl28cpld.c new file mode 100644 index 000000000000..800e218ee624 --- /dev/null +++ b/drivers/gpio/gpio-sl28cpld.c @@ -0,0 +1,180 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * sl28cpld GPIO driver. + * + * Copyright 2019 Michael Walle + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* GPIO flavor */ +#define GPIO_REG_DIR 0x00 +#define GPIO_REG_OUT 0x01 +#define GPIO_REG_IN 0x02 +#define GPIO_REG_IE 0x03 +#define GPIO_REG_IP 0x04 + +/* input-only flavor */ +#define GPI_REG_IN 0x00 + +/* output-only flavor */ +#define GPO_REG_OUT 0x00 + +enum sl28cpld_gpio_type { + SL28CPLD_GPIO = 1, + SL28CPLD_GPI, + SL28CPLD_GPO, +}; + +struct sl28cpld_gpio { + struct regmap_irq_chip irq_chip; + struct regmap_irq_chip_data *irq_data; +}; + +static const struct regmap_irq sl28cpld_gpio_irqs[] = { + REGMAP_IRQ_REG_LINE(0, 8), + REGMAP_IRQ_REG_LINE(1, 8), + REGMAP_IRQ_REG_LINE(2, 8), + REGMAP_IRQ_REG_LINE(3, 8), + REGMAP_IRQ_REG_LINE(4, 8), + REGMAP_IRQ_REG_LINE(5, 8), + REGMAP_IRQ_REG_LINE(6, 8), + REGMAP_IRQ_REG_LINE(7, 8), +}; + +static int sl28cpld_gpio_irq_init(struct device *dev, + struct sl28cpld_gpio *gpio, + struct regmap *regmap, unsigned int base, + int irq) +{ + struct regmap_irq_chip *irq_chip = &gpio->irq_chip; + + irq_chip->name = "sl28cpld-gpio-irq", + irq_chip->irqs = sl28cpld_gpio_irqs; + irq_chip->num_irqs = ARRAY_SIZE(sl28cpld_gpio_irqs); + irq_chip->num_regs = 1; + irq_chip->status_base = base + GPIO_REG_IP; + irq_chip->mask_base = base + GPIO_REG_IE; + irq_chip->mask_invert = true, + irq_chip->ack_base = base + GPIO_REG_IP; + + return devm_regmap_add_irq_chip_np(dev, dev_of_node(dev), regmap, + irq, IRQF_SHARED | IRQF_ONESHOT, 0, + irq_chip, &gpio->irq_data); +} + +static int sl28cpld_gpio_probe(struct platform_device *pdev) +{ + const struct platform_device_id *dev_id; + struct gpio_regmap_config config = {0}; + enum sl28cpld_gpio_type type; + struct sl28cpld_gpio *gpio; + bool irq_support = false; + struct regmap *regmap; + int irq, ret; + u32 base; + + if (!pdev->dev.parent) + return -ENODEV; + + dev_id = platform_get_device_id(pdev); + if (dev_id) + type = dev_id->driver_data; + else + type = (uintptr_t)of_device_get_match_data(&pdev->dev); + if (!type) + return -ENODEV; + + gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); + if (!gpio) + return -ENOMEM; + + ret = device_property_read_u32(&pdev->dev, "reg", &base); + if (ret) + return -EINVAL; + + regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!regmap) + return -ENODEV; + + config.regmap = regmap; + config.parent = &pdev->dev; + config.ngpio = 8; + + switch (type) { + case SL28CPLD_GPIO: + config.reg_dat_base = base + GPIO_REG_IN; + config.reg_set_base = base + GPIO_REG_OUT; + /* reg_dir_out_base might be zero */ + config.reg_dir_out_base = GPIO_REGMAP_ADDR(base + + GPIO_REG_DIR); + irq_support = true; + break; + case SL28CPLD_GPO: + config.reg_set_base = base + GPO_REG_OUT; + break; + case SL28CPLD_GPI: + config.reg_dat_base = base + GPI_REG_IN; + break; + default: + dev_err(&pdev->dev, "unknown type %d\n", type); + return -ENODEV; + } + + if (irq_support && + device_property_read_bool(&pdev->dev, "interrupt-controller")) { + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = sl28cpld_gpio_irq_init(&pdev->dev, gpio, regmap, + base, irq); + if (ret) + return ret; + + config.irq_domain = regmap_irq_get_domain(gpio->irq_data); + } + + return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(&pdev->dev, &config)); +} + +static const struct of_device_id sl28cpld_gpio_of_match[] = { + { .compatible = "kontron,sl28cpld-gpio", + .data = (void *)SL28CPLD_GPIO }, + { .compatible = "kontron,sl28cpld-gpi", + .data = (void *)SL28CPLD_GPI }, + { .compatible = "kontron,sl28cpld-gpo", + .data = (void *)SL28CPLD_GPO }, + {}, +}; +MODULE_DEVICE_TABLE(of, sl28cpld_gpio_of_match); + +static const struct platform_device_id sl28cpld_gpio_id_table[] = { + { "sl28cpld-gpio", SL28CPLD_GPIO }, + { "sl28cpld-gpi", SL28CPLD_GPI }, + { "sl28cpld-gpo", SL28CPLD_GPO }, + {} +}; +MODULE_DEVICE_TABLE(platform, sl28cpld_gpio_id_table); + +static struct platform_driver sl28cpld_gpio_driver = { + .probe = sl28cpld_gpio_probe, + .id_table = sl28cpld_gpio_id_table, + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = sl28cpld_gpio_of_match, + }, +}; +module_platform_driver(sl28cpld_gpio_driver); + +MODULE_DESCRIPTION("sl28cpld GPIO Driver"); +MODULE_AUTHOR("Michael Walle "); +MODULE_LICENSE("GPL"); From patchwork Thu Jun 4 21:10:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 199527 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA27CC433E0 for ; Thu, 4 Jun 2020 21:11:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C4EBA2077D for ; Thu, 4 Jun 2020 21:11:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=walle.cc header.i=@walle.cc header.b="o+vZLnBI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727085AbgFDVLb (ORCPT ); Thu, 4 Jun 2020 17:11:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726990AbgFDVL1 (ORCPT ); Thu, 4 Jun 2020 17:11:27 -0400 Received: from ssl.serverraum.org (ssl.serverraum.org [IPv6:2a01:4f8:151:8464::1:2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6F093C08C5C0; Thu, 4 Jun 2020 14:11:27 -0700 (PDT) Received: from apollo.fritz.box (unknown [IPv6:2a02:810c:c200:2e91:6257:18ff:fec4:ca34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id 6EC4F22FEC; Thu, 4 Jun 2020 23:11:23 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1591305083; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=P765amx+zU7utCaFALSE7pMeVXYJ3s6D40KdmPjCfT0=; b=o+vZLnBILoGeGtjkZYEjU3M/+S6xYOToJEX/7gk23eNCLUBCLhENgtkUUAVtsAeRSsDS3L leim1CLueSc6cX/lKurHP4QdcyCZaLrqO9rFdEYw41Q2ZZs3Zgmq7WVRxLrB3POPMIBd/i 6AG59cvQ4zkLT/G5GUCy2Eyk/vLwlew= From: Michael Walle To: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Linus Walleij , Bartosz Golaszewski , Rob Herring , Jean Delvare , Guenter Roeck , Lee Jones , Thierry Reding , =?utf-8?q?Uwe_Kleine-K?= =?utf-8?b?w7ZuaWc=?= , Wim Van Sebroeck , Shawn Guo , Li Yang , Thomas Gleixner , Jason Cooper , Marc Zyngier , Mark Brown , Greg Kroah-Hartman , Andy Shevchenko , Michael Walle Subject: [PATCH v4 08/11] arm64: dts: freescale: sl28: enable sl28cpld Date: Thu, 4 Jun 2020 23:10:36 +0200 Message-Id: <20200604211039.12689-9-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200604211039.12689-1-michael@walle.cc> References: <20200604211039.12689-1-michael@walle.cc> MIME-Version: 1.0 X-Spam: Yes Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add the board management controller node. Signed-off-by: Michael Walle --- .../freescale/fsl-ls1028a-kontron-sl28.dts | 102 ++++++++++++++++++ 1 file changed, 102 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts index 360b3a168c10..8712fe82727b 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts @@ -8,6 +8,7 @@ /dts-v1/; #include "fsl-ls1028a.dtsi" +#include / { model = "Kontron SMARC-sAL28"; @@ -170,6 +171,107 @@ reg = <0x32>; }; + sl28cpld@4a { + #address-cells = <1>; + #size-cells = <0>; + compatible = "kontron,sl28cpld-r1"; + reg = <0x4a>; + + watchdog@4 { + compatible = "kontron,sl28cpld-wdt"; + reg = <0x4>; + kontron,assert-wdt-timeout-pin; + }; + + hwmon@b { + compatible = "kontron,sl28cpld-fan"; + reg = <0xb>; + }; + + sl28cpld_pwm0: pwm@c { + #pwm-cells = <2>; + compatible = "kontron,sl28cpld-pwm"; + reg = <0xc>; + }; + + sl28cpld_pwm1: pwm@e { + #pwm-cells = <2>; + compatible = "kontron,sl28cpld-pwm"; + reg = <0xe>; + }; + + sl28cpld_gpio0: gpio@10 { + compatible = "kontron,sl28cpld-gpio"; + reg = <0x10>; + interrupts-extended = <&gpio2 6 + IRQ_TYPE_EDGE_FALLING>; + + gpio-controller; + #gpio-cells = <2>; + gpio-line-names = + "GPIO0_CAM0_PWR_N", "GPIO1_CAM1_PWR_N", + "GPIO2_CAM0_RST_N", "GPIO3_CAM1_RST_N", + "GPIO4_HDA_RST_N", "GPIO5_PWM_OUT", + "GPIO6_TACHIN", "GPIO7"; + + interrupt-controller; + #interrupt-cells = <2>; + }; + + sl28cpld_gpio1: gpio@15 { + compatible = "kontron,sl28cpld-gpio"; + reg = <0x15>; + interrupts-extended = <&gpio2 6 + IRQ_TYPE_EDGE_FALLING>; + + gpio-controller; + #gpio-cells = <2>; + gpio-line-names = + "GPIO8", "GPIO9", "GPIO10", "GPIO11", + "", "", "", ""; + + interrupt-controller; + #interrupt-cells = <2>; + }; + + sl28cpld_gpio2: gpio@1a { + compatible = "kontron,sl28cpld-gpo"; + reg = <0x1a>; + + gpio-controller; + #gpio-cells = <2>; + gpio-line-names = + "LCD0 voltage enable", + "LCD0 backlight enable", + "eMMC reset", "LVDS bridge reset", + "LVDS bridge power-down", + "SDIO power enable", + "", ""; + }; + + sl28cpld_gpio3: gpio@1b { + compatible = "kontron,sl28cpld-gpi"; + reg = <0x1b>; + + gpio-controller; + #gpio-cells = <2>; + gpio-line-names = + "Power button", "Force recovery", "Sleep", + "Battery low", "Lid state", "Charging", + "Charger present", ""; + }; + + sl28cpld_intc: interrupt-controller@1c { + compatible = "kontron,sl28cpld-intc"; + reg = <0x1c>; + interrupts-extended = <&gpio2 6 + IRQ_TYPE_EDGE_FALLING>; + + interrupt-controller; + #interrupt-cells = <2>; + }; + }; + eeprom@50 { compatible = "atmel,24c32"; reg = <0x50>; From patchwork Thu Jun 4 21:10:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 199526 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9E494C433E2 for ; Thu, 4 Jun 2020 21:11:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7D33D2067B for ; Thu, 4 Jun 2020 21:11:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=walle.cc header.i=@walle.cc header.b="t86DPgJS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727038AbgFDVLa (ORCPT ); Thu, 4 Jun 2020 17:11:30 -0400 Received: from ssl.serverraum.org ([176.9.125.105]:47269 "EHLO ssl.serverraum.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727004AbgFDVL3 (ORCPT ); Thu, 4 Jun 2020 17:11:29 -0400 Received: from apollo.fritz.box (unknown [IPv6:2a02:810c:c200:2e91:6257:18ff:fec4:ca34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id 351FC22FF5; Thu, 4 Jun 2020 23:11:26 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1591305086; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RWArDHiolCJTumoboB4Zgi8UNDIKAigY3oAQ9g/838E=; b=t86DPgJS1ouPHWYmgKjzz1Hwh/gN4kps0XfHMTEb1T4pY6q+aq/Q9H5iu7922mgoWXoxkE HaNQaQJHgTcwG00xkom6vyYdLpCdgI/v8NjAOuksMvTNswG2hA5JE6PMYUdOZWVyNIx5oL 67y6fh78UK5pWpQCYdCqNDR90OQmv3Y= From: Michael Walle To: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Linus Walleij , Bartosz Golaszewski , Rob Herring , Jean Delvare , Guenter Roeck , Lee Jones , Thierry Reding , =?utf-8?q?Uwe_Kleine-K?= =?utf-8?b?w7ZuaWc=?= , Wim Van Sebroeck , Shawn Guo , Li Yang , Thomas Gleixner , Jason Cooper , Marc Zyngier , Mark Brown , Greg Kroah-Hartman , Andy Shevchenko , Michael Walle Subject: [PATCH v4 09/11] arm64: dts: freescale: sl28: map GPIOs to input events Date: Thu, 4 Jun 2020 23:10:37 +0200 Message-Id: <20200604211039.12689-10-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200604211039.12689-1-michael@walle.cc> References: <20200604211039.12689-1-michael@walle.cc> MIME-Version: 1.0 X-Spam: Yes Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Now that we have support for GPIO lines of the SMARC connector, map the sleep, power and lid switch signals to the corresponding keys using the gpio-keys and gpio-keys-polled drivers. The power and sleep signals have dedicated interrupts, thus we use these ones. The lid switch is just mapped to a GPIO input and needs polling. Signed-off-by: Michael Walle --- .../freescale/fsl-ls1028a-kontron-sl28.dts | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts index 8712fe82727b..c4fd99efdbba 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts @@ -9,6 +9,8 @@ /dts-v1/; #include "fsl-ls1028a.dtsi" #include +#include +#include / { model = "Kontron SMARC-sAL28"; @@ -23,6 +25,36 @@ spi1 = &dspi2; }; + buttons0 { + compatible = "gpio-keys"; + + power-button { + interrupts-extended = <&sl28cpld_intc + 4 IRQ_TYPE_EDGE_BOTH>; + linux,code = ; + label = "Power"; + }; + + sleep-button { + interrupts-extended = <&sl28cpld_intc + 5 IRQ_TYPE_EDGE_BOTH>; + linux,code = ; + label = "Sleep"; + }; + }; + + buttons1 { + compatible = "gpio-keys-polled"; + poll-interval = <200>; + + lid-switch { + linux,input-type = ; + linux,code = ; + gpios = <&sl28cpld_gpio3 4 GPIO_ACTIVE_LOW>; + label = "Lid"; + }; + }; + chosen { stdout-path = "serial0:115200n8"; };