From patchwork Mon Jun 4 16:59:40 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Radu Pirea X-Patchwork-Id: 10447047 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 141A7601A1 for ; Mon, 4 Jun 2018 16:59:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 09CDF28DDE for ; Mon, 4 Jun 2018 16:59:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F275328E0C; Mon, 4 Jun 2018 16:59:43 +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=-7.9 required=2.0 tests=BAYES_00, 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 9638628DDE for ; Mon, 4 Jun 2018 16:59:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751596AbeFDQ6u (ORCPT ); Mon, 4 Jun 2018 12:58:50 -0400 Received: from esa2.microchip.iphmx.com ([68.232.149.84]:33199 "EHLO esa2.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751570AbeFDQ6r (ORCPT ); Mon, 4 Jun 2018 12:58:47 -0400 X-IronPort-AV: E=Sophos;i="5.49,476,1520924400"; d="scan'208";a="14837934" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa2.microchip.iphmx.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 04 Jun 2018 09:58:46 -0700 Received: from m19893.microchip.com (10.10.76.4) by chn-sv-exch02.mchp-main.com (10.10.76.38) with Microsoft SMTP Server id 14.3.352.0; Mon, 4 Jun 2018 09:58:43 -0700 From: Radu Pirea To: , , , , , , , CC: , , , , , Radu Pirea Subject: [PATCH v5 3/6] mfd: at91-usart: added mfd driver for usart Date: Mon, 4 Jun 2018 19:59:40 +0300 Message-ID: <20180604165943.31381-4-radu.pirea@microchip.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180604165943.31381-1-radu.pirea@microchip.com> References: <20180604165943.31381-1-radu.pirea@microchip.com> MIME-Version: 1.0 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 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 | 67 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 77 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..262e7affba22 --- /dev/null +++ b/drivers/mfd/at91-usart.c @@ -0,0 +1,67 @@ +// 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");