From patchwork Mon May 24 12:05:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Marko X-Patchwork-Id: 446606 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 157A6C2B9F7 for ; Mon, 24 May 2021 12:05:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E4183613B0 for ; Mon, 24 May 2021 12:05:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232785AbhEXMHQ (ORCPT ); Mon, 24 May 2021 08:07:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56176 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232754AbhEXMHQ (ORCPT ); Mon, 24 May 2021 08:07:16 -0400 Received: from mail-wr1-x431.google.com (mail-wr1-x431.google.com [IPv6:2a00:1450:4864:20::431]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5A120C06138A for ; Mon, 24 May 2021 05:05:48 -0700 (PDT) Received: by mail-wr1-x431.google.com with SMTP id q5so28270895wrs.4 for ; Mon, 24 May 2021 05:05:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sartura-hr.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=QIlx8qZg5d6Uh9n8TaRrLxl4VsPkpMZ5hbZxfKGEKz4=; b=Y4UGAO23lMHMf7wrtfze7s/u2E+7odBkNQ6l3hHiQy5GecB/zslNhIpvQN1TN2U/B3 VTRhKNgBMpqmxKGeZOFa8fUcDoHt6rpV34s9q6sgowEMVh7+jjLtVsCd0Uer9lZhPRyE HWcJ3Ut/ED4Bi4kDqQeQj1unGBS5J+nKH7SoLbu5yHnFrg79vmV6E6z3qRBVDoVURaMJ RaG1wirKGv4MLYfZzZ/O3A7Hw67WcqmyvfSr+solixkSU42/wxhBMXqc/z0K0iAtDn8Z 2v8KOyMUf3JWVMozzz3eib3kP5AvQEcmxhAMLhf+ShBHL48FBCtxTB31knoprU4YBwlk 997Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=QIlx8qZg5d6Uh9n8TaRrLxl4VsPkpMZ5hbZxfKGEKz4=; b=PbHcocnF+r6xzGPWgwyyo05xSd9b6MXYZDSeBaav9B7r/a6oWw1FAmNibeiIxJ6jvk dOdpSpscdXxwnF3VNviXgGQ9PgJb8eNzVoDgyD8EYKODOigmTTU/O9alJuDnrxlBAm0S gDKvlAQOa/8fTJOfVCIc1xyG/bFkuGFF+M8cAi9dU1XvvaxyPZ430Fp12flJGuw+5q5Q sTclPOZI3dCzqT0O0SRjfsQ18JP+q7CmL6UC2TwrW9dvEIoIA0p6LqRsgrbviCm02gMi EJV9cB3Gr9ByCX9PJSNQh0+JpOEBAt8zIZ4O2suraDhXlDvDImMwioQxWN6KQ/JzRkIy Owzw== X-Gm-Message-State: AOAM530shtMGXCLKqjrGzjNq3sGxEJrJtBMLvtkxqb9wI/XSJAbdpkD1 zyvyH4yK5xPbL4BkgS4Yuukcww== X-Google-Smtp-Source: ABdhPJyrIguuCaLAAt7tDQ0qjABDr07zCPmN8UpVUCNQEQlY/Rt+Daa+mIPRwCbCglde2+BU0MyA7w== X-Received: by 2002:adf:f309:: with SMTP id i9mr22279437wro.307.1621857946909; Mon, 24 May 2021 05:05:46 -0700 (PDT) Received: from localhost.localdomain ([188.252.220.224]) by smtp.googlemail.com with ESMTPSA id b10sm14342856wrr.27.2021.05.24.05.05.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 May 2021 05:05:46 -0700 (PDT) From: Robert Marko To: linus.walleij@linaro.org, bgolaszewski@baylibre.com, robh+dt@kernel.org, lee.jones@linaro.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: luka.perkov@sartura.hr, jmp@epiphyte.org, pmenzel@molgen.mpg.de, buczek@molgen.mpg.de, Robert Marko Subject: [PATCH v2 2/4] gpio: Add Delta TN48M CPLD GPIO driver Date: Mon, 24 May 2021 14:05:37 +0200 Message-Id: <20210524120539.3267145-2-robert.marko@sartura.hr> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210524120539.3267145-1-robert.marko@sartura.hr> References: <20210524120539.3267145-1-robert.marko@sartura.hr> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Delta TN48M CPLD is used as a GPIO expander for the SFP GPIOs. It is a mix of input only and output only pins. Signed-off-by: Robert Marko Reviewed-by: Andy Shevchenko Acked-by: Bartosz Golaszewski Reviewed-by: Linus Walleij --- Changes in v2: * Rewrite to use simple I2C MFD and GPIO regmap * Drop DT bindings for pin numbering drivers/gpio/Kconfig | 12 ++++++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-tn48m.c | 89 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 102 insertions(+) create mode 100644 drivers/gpio/gpio-tn48m.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 1dd0ec6727fd..46caf72960e6 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -1332,6 +1332,18 @@ config GPIO_TIMBERDALE help Add support for the GPIO IP in the timberdale FPGA. +config GPIO_TN48M_CPLD + tristate "Delta Networks TN48M switch CPLD GPIO driver" + depends on MFD_TN48M_CPLD + select GPIO_REGMAP + help + This enables support for the GPIOs found on the Delta + Networks TN48M switch CPLD. + They are used for inputs and outputs on the SFP slots. + + This driver can also be built as a module. If so, the + module will be called gpio-tn48m. + config GPIO_TPS65086 tristate "TI TPS65086 GPO" depends on MFD_TPS65086 diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index d7c81e1611a4..07fa6419305f 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -147,6 +147,7 @@ obj-$(CONFIG_GPIO_TEGRA186) += gpio-tegra186.o obj-$(CONFIG_GPIO_TEGRA) += gpio-tegra.o obj-$(CONFIG_GPIO_THUNDERX) += gpio-thunderx.o obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o +obj-$(CONFIG_GPIO_TN48M_CPLD) += gpio-tn48m.o obj-$(CONFIG_GPIO_TPIC2810) += gpio-tpic2810.o obj-$(CONFIG_GPIO_TPS65086) += gpio-tps65086.o obj-$(CONFIG_GPIO_TPS65218) += gpio-tps65218.o diff --git a/drivers/gpio/gpio-tn48m.c b/drivers/gpio/gpio-tn48m.c new file mode 100644 index 000000000000..41484c002826 --- /dev/null +++ b/drivers/gpio/gpio-tn48m.c @@ -0,0 +1,89 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Delta TN48M CPLD GPIO driver + * + * Copyright 2021 Sartura Ltd + * + * Author: Robert Marko + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +enum tn48m_gpio_type { + TN48M_SFP_TX_DISABLE = 1, + TN48M_SFP_PRESENT, + TN48M_SFP_LOS, +}; + +static int tn48m_gpio_probe(struct platform_device *pdev) +{ + struct gpio_regmap_config config = {0}; + enum tn48m_gpio_type type; + struct regmap *regmap; + u32 base; + int ret; + + if (!pdev->dev.parent) + return -ENODEV; + + type = (uintptr_t)device_get_match_data(&pdev->dev); + if (!type) + return -ENODEV; + + 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 = 4; + + switch (type) { + case TN48M_SFP_TX_DISABLE: + config.reg_set_base = base; + break; + case TN48M_SFP_PRESENT: + config.reg_dat_base = base; + break; + case TN48M_SFP_LOS: + config.reg_dat_base = base; + break; + default: + dev_err(&pdev->dev, "unknown type %d\n", type); + return -ENODEV; + } + + return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(&pdev->dev, &config)); +} + +static const struct of_device_id tn48m_gpio_of_match[] = { + { .compatible = "delta,tn48m-gpio-sfp-tx-disable", .data = (void *)TN48M_SFP_TX_DISABLE }, + { .compatible = "delta,tn48m-gpio-sfp-present", .data = (void *)TN48M_SFP_PRESENT }, + { .compatible = "delta,tn48m-gpio-sfp-los", .data = (void *)TN48M_SFP_LOS }, + { } +}; +MODULE_DEVICE_TABLE(of, tn48m_gpio_of_match); + +static struct platform_driver tn48m_gpio_driver = { + .driver = { + .name = "delta-tn48m-gpio", + .of_match_table = tn48m_gpio_of_match, + }, + .probe = tn48m_gpio_probe, +}; +module_platform_driver(tn48m_gpio_driver); + +MODULE_AUTHOR("Robert Marko "); +MODULE_DESCRIPTION("Delta TN48M CPLD GPIO driver"); +MODULE_LICENSE("GPL");