From patchwork Tue Sep 4 11:13:07 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Radu Pirea X-Patchwork-Id: 10587129 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EF9EF112B for ; Tue, 4 Sep 2018 11:20:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E46AC2921C for ; Tue, 4 Sep 2018 11:20:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D8E3429230; Tue, 4 Sep 2018 11:20:33 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5BCC02921C for ; Tue, 4 Sep 2018 11:20:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727551AbeIDPpJ (ORCPT ); Tue, 4 Sep 2018 11:45:09 -0400 Received: from mail-sender230.upb.ro ([141.85.13.230]:56734 "EHLO mx.upb.ro" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727454AbeIDPpD (ORCPT ); Tue, 4 Sep 2018 11:45:03 -0400 Received: from mx.upb.ro (localhost [127.0.0.1]) by mx.upb.ro (Postfix) with ESMTPS id 1B552B560060; Tue, 4 Sep 2018 14:13:21 +0300 (EEST) Received: from localhost (localhost [127.0.0.1]) by mx.upb.ro (Postfix) with ESMTP id DD88BB560063; Tue, 4 Sep 2018 14:13:20 +0300 (EEST) DKIM-Filter: OpenDKIM Filter v2.10.3 mx.upb.ro DD88BB560063 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=upb.ro; s=96342B8A-77E4-11E5-BA93-D93D0963A2DF; t=1536059600; bh=jURLLgmV3noC2145CGKJEt5aymllIv3r3uQnmUJAhpo=; h=From:To:Date:Message-Id; b=pANWrGe2sCjh1QIPScb8reuJ7J7mq62BwXt9GhjVzJruGxiKLVQ4H//GamyM/JElB wRGPQAxDjn2U9cFm7WXFR345QDX9qWi2q3WMacTlYN1XvAmJFY+zKkijEUsWkbLcgE cYj0avAPuIjIjkgthVt0UseI40bhqV9Z9nN/PZg0= Received: from mx.upb.ro ([127.0.0.1]) by localhost (mx.upb.ro [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id lYIvXQVXm27Y; Tue, 4 Sep 2018 14:13:20 +0300 (EEST) Received: from asus-rog.localdomain (arh.pub.ro [141.85.160.17]) by mx.upb.ro (Postfix) with ESMTPSA id B24B1B56004E; Tue, 4 Sep 2018 14:13:20 +0300 (EEST) From: Radu Pirea To: lee.jones@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, nicolas.ferre@microchip.com, alexandre.belloni@bootlin.com, gregkh@linuxfoundation.org, broonie@kernel.org, jslaby@suse.com, richard.genoud@gmail.com, davem@davemloft.net, mchehab+samsung@kernel.org, akpm@linux-foundation.org, arnd@arndb.de Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-spi@vger.kernel.org, Radu Pirea Subject: [PATCH v12 3/6] mfd: at91-usart: added mfd driver for usart Date: Tue, 4 Sep 2018 14:13:07 +0300 Message-Id: <20180904111310.4049-4-radu_nicolae.pirea@upb.ro> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180904111310.4049-1-radu_nicolae.pirea@upb.ro> References: <20180904111310.4049-1-radu_nicolae.pirea@upb.ro> Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Radu Pirea 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 Reviewed-by: Andy Shevchenko Acked-by: Rob Herring Acked-for-MFD-by: Lee Jones Acked-by: Nicolas Ferre --- drivers/mfd/Kconfig | 9 +++++ drivers/mfd/Makefile | 1 + drivers/mfd/at91-usart.c | 71 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 81 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 e9fd20dba18d..c7e66928abb9 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -184,6 +184,7 @@ 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..a4b9929c156f --- /dev/null +++ b/drivers/mfd/at91-usart.c @@ -0,0 +1,71 @@ +// 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 = AT91_USART_MODE_SERIAL; + + 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: + cell = at91_usart_serial_subdev; + break; + default: + dev_err(&pdev->dev, "atmel,usart-mode has an invalid value %u\n", + opmode); + return -EINVAL; + } + + 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_usart_mode_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");