From patchwork Tue Mar 17 20:50:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 11443957 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 304E890 for ; Tue, 17 Mar 2020 20:50:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0538C2076F for ; Tue, 17 Mar 2020 20:50:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=walle.cc header.i=@walle.cc header.b="o7pFSsqu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726976AbgCQUuz (ORCPT ); Tue, 17 Mar 2020 16:50:55 -0400 Received: from ssl.serverraum.org ([176.9.125.105]:58263 "EHLO ssl.serverraum.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726897AbgCQUuy (ORCPT ); Tue, 17 Mar 2020 16:50:54 -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 7CB6C23E5E; Tue, 17 Mar 2020 21:50:50 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1584478251; 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=y0nO69Q7JxaeYvAKKhyuVwLXm694mhiGkavva5IWoko=; b=o7pFSsquzKt29aXrpzJytIbwVRG0BCKQ6xwXnPIZ5WA8aZbpSHaSxO4kzSILVMr0tuqD68 7xb950070fepsQPXEUnSWsTqVnHNZU+gQJBEe0l27HdEjoLJFe4C/BcSWK2zA4mYbt9DeH r259fZtVOSI0JDXaCmAUgDBAtX5fG0E= 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=C3=B6nig?= , Wim Van Sebroeck , Shawn Guo , Li Yang , Thomas Gleixner , Jason Cooper , Marc Zyngier , Michael Walle Subject: [PATCH 05/18] mfd: Add support for Kontron sl28cpld management controller Date: Tue, 17 Mar 2020 21:50:04 +0100 Message-Id: <20200317205017.28280-6-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200317205017.28280-1-michael@walle.cc> References: <20200317205017.28280-1-michael@walle.cc> MIME-Version: 1.0 X-Spamd-Bar: ++++++ X-Spam-Level: ****** X-Rspamd-Server: web X-Spam-Status: Yes, score=6.40 X-Spam-Score: 6.40 X-Rspamd-Queue-Id: 7CB6C23E5E X-Spamd-Result: default: False [6.40 / 15.00]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TAGGED_RCPT(0.00)[dt]; MIME_GOOD(-0.10)[text/plain]; BROKEN_CONTENT_TYPE(1.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_SPAM(0.00)[0.498]; DKIM_SIGNED(0.00)[]; RCPT_COUNT_TWELVE(0.00)[22]; MID_CONTAINS_FROM(1.00)[]; RCVD_COUNT_ZERO(0.00)[0]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:31334, ipnet:2a02:810c:8000::/33, country:DE]; FREEMAIL_CC(0.00)[linaro.org,baylibre.com,kernel.org,suse.com,roeck-us.net,gmail.com,pengutronix.de,linux-watchdog.org,nxp.com,linutronix.de,lakedaemon.net,walle.cc]; SUSPICIOUS_RECIPS(1.50)[] X-Spam: Yes Sender: linux-watchdog-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org This patch adds 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. Signed-off-by: Michael Walle --- drivers/mfd/Kconfig | 21 ++++++ drivers/mfd/Makefile | 2 + drivers/mfd/sl28cpld.c | 155 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 178 insertions(+) create mode 100644 drivers/mfd/sl28cpld.c diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 3c547ed575e6..01588c366476 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2059,5 +2059,26 @@ 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 + tristate "Kontron sl28 core driver" + depends on I2C=y + depends on OF + select REGMAP_I2C + select REGMAP_IRQ + select SL28CPLD_IRQ + 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 f935d10cbf0f..9bc38863b9c7 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -259,3 +259,5 @@ 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..789f21f90752 --- /dev/null +++ b/drivers/mfd/sl28cpld.c @@ -0,0 +1,155 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * MFD core for the CPLD on a SMARC-sAL28 board. + * + * Copyright 2019 Kontron Europe GmbH + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define SL28CPLD_VERSION 0x03 +#define SL28CPLD_WATCHDOG_BASE 0x4 +#define SL28CPLD_HWMON_FAN_BASE 0xb +#define SL28CPLD_PWM0_BASE 0xc +#define SL28CPLD_PWM1_BASE 0xe +#define SL28CPLD_GPIO0_BASE 0x10 +#define SL28CPLD_GPIO1_BASE 0x15 +#define SL28CPLD_GPO_BASE 0x1a +#define SL28CPLD_GPI_BASE 0x1b +#define SL28CPLD_INTC_BASE 0x1c + +/* all subdevices share the same IRQ */ +#define SL28CPLD_IRQ 0 + +#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 struct resource sl28cpld_watchdog_resources[] = { + DEFINE_RES_REG(SL28CPLD_WATCHDOG_BASE, 1), +}; + +static struct resource sl28cpld_hwmon_fan_resources[] = { + DEFINE_RES_REG(SL28CPLD_HWMON_FAN_BASE, 1), +}; + +static struct resource sl28cpld_pwm0_resources[] = { + DEFINE_RES_REG(SL28CPLD_PWM0_BASE, 1), +}; + +static struct resource sl28cpld_pwm1_resources[] = { + DEFINE_RES_REG(SL28CPLD_PWM1_BASE, 1), +}; + +static struct resource sl28cpld_gpio0_resources[] = { + DEFINE_RES_REG(SL28CPLD_GPIO0_BASE, 1), + DEFINE_RES_IRQ(SL28CPLD_IRQ), +}; + +static struct resource sl28cpld_gpio1_resources[] = { + DEFINE_RES_REG(SL28CPLD_GPIO1_BASE, 1), + DEFINE_RES_IRQ(SL28CPLD_IRQ), +}; + +static struct resource sl28cpld_gpo_resources[] = { + DEFINE_RES_REG(SL28CPLD_GPO_BASE, 1), +}; + +static struct resource sl28cpld_gpi_resources[] = { + DEFINE_RES_REG(SL28CPLD_GPI_BASE, 1), +}; + +static struct resource sl28cpld_intc_resources[] = { + DEFINE_RES_REG(SL28CPLD_INTC_BASE, 1), + DEFINE_RES_IRQ(SL28CPLD_IRQ), +}; + +static const struct mfd_cell sl28cpld_devs[] = { + OF_MFD_CELL("sl28cpld-wdt", sl28cpld_watchdog_resources, NULL, 0, 0, + "kontron,sl28cpld-wdt"), + OF_MFD_CELL("sl28cpld-fan", sl28cpld_hwmon_fan_resources, NULL, 0, 0, + "kontron,sl28cpld-fan"), + OF_MFD_CELL("sl28cpld-pwm", sl28cpld_pwm0_resources, NULL, 0, 0, + "kontron,sl28cpld-pwm"), + OF_MFD_CELL("sl28cpld-pwm", sl28cpld_pwm1_resources, NULL, 0, 1, + "kontron,sl28cpld-pwm"), + OF_MFD_CELL("sl28cpld-gpio", sl28cpld_gpio0_resources, NULL, 0, 0, + "kontron,sl28cpld-gpio"), + OF_MFD_CELL("sl28cpld-gpio", sl28cpld_gpio1_resources, NULL, 0, 1, + "kontron,sl28cpld-gpio"), + OF_MFD_CELL("sl28cpld-gpo", sl28cpld_gpo_resources, NULL, 0, 0, + "kontron,sl28cpld-gpo"), + OF_MFD_CELL("sl28cpld-gpi", sl28cpld_gpi_resources, NULL, 0, 0, + "kontron,sl28cpld-gpi"), + OF_MFD_CELL("sl28cpld-intc", sl28cpld_intc_resources, NULL, 0, 0, + "kontron,sl28cpld-intc"), +}; + +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_mfd_add_devices(dev, -1, sl28cpld_devs, + ARRAY_SIZE(sl28cpld_devs), NULL, + i2c->irq, NULL); +} + +static const struct of_device_id sl28cpld_of_match[] = { + { .compatible = "kontron,sl28cpld", }, + {} +}; +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_LICENSE("GPL");