From patchwork Thu Jun 7 11:00:17 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Radu Pirea X-Patchwork-Id: 10451667 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2D7666037F for ; Thu, 7 Jun 2018 11:01:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1BB4029BF3 for ; Thu, 7 Jun 2018 11:01:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0E31D29C36; Thu, 7 Jun 2018 11:01:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id F062129BF3 for ; Thu, 7 Jun 2018 11:01:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=G7uyLhC3pmGlqXSmH8xVuRYB2lyleRXPWXi6AFgZL78=; b=eEJayTAMOCd6lr eaSFyvWX96QQapRblweji9BYwzWKUhnybyGe520rDE8SK65kc7d/Tkc7OYdB0R8SbIO8H9uIdSVh1 k+GDDNUt+D+UQ6CkgDKSq7NqcuRXnizYUbFmEMIyLckWLsrh/BsMZ+gNmchapFmmhFeaCt6GrHlBr e20NPoxdXYSFrhFkNhYuHRvHy3RidJeKhDLMQggVslkGS4IAkKI8WQLTB705WCclLzhxujK9j1oji r9GaiIud82xeqsFo3enSt6RZn2uFtR12sfCuDoOnfN5/FcQFATCd7QX18DD+H2OLo6iJrkAb48g99 AQkMaHHqZQg+xWgklFmw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fQsfV-0001lt-Vg; Thu, 07 Jun 2018 11:01:25 +0000 Received: from esa6.microchip.iphmx.com ([216.71.154.253]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fQse7-0007yj-A6 for linux-arm-kernel@lists.infradead.org; Thu, 07 Jun 2018 11:00:01 +0000 X-IronPort-AV: E=Sophos;i="5.49,486,1520924400"; d="scan'208";a="12270510" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES128-SHA; 07 Jun 2018 03:59:52 -0700 Received: from m19893.microchip.com (10.10.76.4) by CHN-SV-EXCH01.mchp-main.com (10.10.76.37) with Microsoft SMTP Server id 14.3.352.0; Thu, 7 Jun 2018 03:59:51 -0700 From: Radu Pirea To: , , , , , , , Subject: [PATCH v6 3/6] mfd: at91-usart: added mfd driver for usart Date: Thu, 7 Jun 2018 14:00:17 +0300 Message-ID: <20180607110020.20565-4-radu.pirea@microchip.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180607110020.20565-1-radu.pirea@microchip.com> References: <20180607110020.20565-1-radu.pirea@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180607_035959_419898_1B2EE873 X-CRM114-Status: GOOD ( 15.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, linux-serial@vger.kernel.org, Radu Pirea , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This mfd driver is just a wrapper over atmel_serial driver and spi-at91-usart driver. Selection of one of the drivers is based on a property from device tree. If the property is not specified, the default driver is atmel_serial. Signed-off-by: Radu Pirea Acked-by: Rob Herring --- drivers/mfd/Kconfig | 9 ++++++ drivers/mfd/Makefile | 1 + drivers/mfd/at91-usart.c | 68 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 78 insertions(+) create mode 100644 drivers/mfd/at91-usart.c diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index b860eb5aa194..a886672b960d 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -99,6 +99,15 @@ config MFD_AAT2870_CORE additional drivers must be enabled in order to use the functionality of the device. +config MFD_AT91_USART + tristate "AT91 USART Driver" + select MFD_CORE + help + Select this to get support for AT91 USART IP. This is a wrapper + over at91-usart-serial driver and usart-spi-driver. Only one function + can be used at a time. The choice is done at boot time by the probe + function of this MFD driver according to a device tree property. + config MFD_ATMEL_FLEXCOM tristate "Atmel Flexcom (Flexible Serial Communication Unit)" select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index d9d2cf0d32ef..db1332aa96db 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -185,6 +185,7 @@ obj-$(CONFIG_MFD_SPMI_PMIC) += qcom-spmi-pmic.o obj-$(CONFIG_TPS65911_COMPARATOR) += tps65911-comparator.o obj-$(CONFIG_MFD_TPS65090) += tps65090.o obj-$(CONFIG_MFD_AAT2870_CORE) += aat2870-core.o +obj-$(CONFIG_MFD_AT91_USART) += at91-usart.o obj-$(CONFIG_MFD_ATMEL_FLEXCOM) += atmel-flexcom.o obj-$(CONFIG_MFD_ATMEL_HLCDC) += atmel-hlcdc.o obj-$(CONFIG_MFD_ATMEL_SMC) += atmel-smc.o diff --git a/drivers/mfd/at91-usart.c b/drivers/mfd/at91-usart.c new file mode 100644 index 000000000000..1a2bdeff7f6d --- /dev/null +++ b/drivers/mfd/at91-usart.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for AT91 USART + * + * Copyright (C) 2018 Microchip Technology + * + * Author: Radu Pirea + * + */ + +#include + +#include +#include +#include + +static struct mfd_cell at91_usart_spi_subdev = { + .name = "at91_usart_spi", + .of_compatible = "microchip,at91sam9g45-usart-spi", + }; + +static struct mfd_cell at91_usart_serial_subdev = { + .name = "atmel_usart_serial", + .of_compatible = "atmel,at91rm9200-usart-serial", + }; + +static int at91_usart_mode_probe(struct platform_device *pdev) +{ + struct mfd_cell cell; + u32 opmode; + int err; + + err = device_property_read_u32(&pdev->dev, "atmel,usart-mode", &opmode); + + switch (opmode) { + case AT91_USART_MODE_SPI: + cell = at91_usart_spi_subdev; + break; + case AT91_USART_MODE_SERIAL: + default: + cell = at91_usart_serial_subdev; + } + + return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO, &cell, 1, + NULL, 0, NULL); +} + +static const struct of_device_id at91_usart_mode_of_match[] = { + { .compatible = "atmel,at91rm9200-usart" }, + { .compatible = "atmel,at91sam9260-usart" }, + { /* sentinel */ } +}; + +MODULE_DEVICE_TABLE(of, at91_flexcom_of_match); + +static struct platform_driver at91_usart_mfd = { + .probe = at91_usart_mode_probe, + .driver = { + .name = "at91_usart_mode", + .of_match_table = at91_usart_mode_of_match, + }, +}; + +module_platform_driver(at91_usart_mfd); + +MODULE_AUTHOR("Radu Pirea "); +MODULE_DESCRIPTION("AT91 USART MFD driver"); +MODULE_LICENSE("GPL v2");