From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 2DF6AC76190 for ; Fri, 26 Jul 2019 13:25:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EDE8022BEF for ; Fri, 26 Jul 2019 13:25:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ABSnbEq7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727320AbfGZNZf (ORCPT ); Fri, 26 Jul 2019 09:25:35 -0400 Received: from mail-pg1-f196.google.com ([209.85.215.196]:44115 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726863AbfGZNZd (ORCPT ); Fri, 26 Jul 2019 09:25:33 -0400 Received: by mail-pg1-f196.google.com with SMTP id i18so24798377pgl.11; Fri, 26 Jul 2019 06:25:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Y/+vYtsCysqhzTsUB/MaZnRyWhMQc4pCqw65yISuFeg=; b=ABSnbEq7gwAOQcJS4x5BPjR9TjiZ/KtpISxsQmuCXZ9MoBHN4Pk/qbasRPH/bovbz7 /gabE+SpXbFSM52BcfmH6FOW+cYZpUHrFAGFVh8fizPuqOvg6gscdBzzH4zV6Ra9gFUx FS3FcUiD56vmqIGZNdiS1sn2xqSalRXnaG1bbbcMUXctzETi9DMsSuwH8Wp0C5rR5amq 8fvgvrVz8RmAJN+u3RtWSyqXPljlYlQt/kUcqWvyz48WGOiFZX/2A+4OmZzahiasGzN5 S7WQQZgSnCHcIMakYAnWg8SjXgfdHZrXYLKUvxDMyhX9MIM4rmqzX4STqIu3Tn1DX5kX yhJQ== 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; bh=Y/+vYtsCysqhzTsUB/MaZnRyWhMQc4pCqw65yISuFeg=; b=s4gvvgKULkccWdS8pCfVJWhFwoaZbrYEXtP9iXW4gjPEyZUUu/TWljY6rLfQKgWDrN adzXK44+GQ/0N9bw87ZTTJHeqOICJZVpNy+obVlvLF0r8JtsK/nW/zyk2LrOZm3nCUb3 VKBIqtsr95QlUVpiAykukc5FQLL12+KI9sMTZJTuQJoJVrJkb+zQIWzLx4G93oa45yQ0 1LK0evg7ELtvlkVofZSkiMoXCB0JGSoxJVufFU/YDE7ZovFdHH69R2pYxI9huKOP3VAT XlraHPeCfSzVCTaO5uso/ihCGb4uO4p/5ZlVAb3QiYqF9+ePLoryy7aBWuDxJ8TIID/z Xz9w== X-Gm-Message-State: APjAAAW2mXPJqv1tRgcEd3Gcwgc00wcxSN1YW1V/AzHGwmKRGrXmh5WL uYe0Aizupm4FsRn+11TumSk= X-Google-Smtp-Source: APXvYqyZxkac6LiJUmd4XgiaCjs6pQWpAXR97GUjfDJ6ofnoz0LFeonQ/46Uw+0sk31ucCSvExwYQw== X-Received: by 2002:a63:1d2:: with SMTP id 201mr56974280pgb.307.1564147532616; Fri, 26 Jul 2019 06:25:32 -0700 (PDT) Received: from Pilot130.192.168.0.22 (211-20-114-70.HINET-IP.hinet.net. [211.20.114.70]) by smtp.googlemail.com with ESMTPSA id k36sm54544603pgl.42.2019.07.26.06.25.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 26 Jul 2019 06:25:32 -0700 (PDT) From: "sudheer.v" To: gregkh@linuxfoundation.org, jslaby@suse.com, joel@jms.id.au, andrew@aj.id.au, benh@kernel.crashing.org, robh+dt@kernel.org, mark.rutland@arm.com, shivahshankar.shankarnarayanrao@aspeedtech.com, sudheer.veliseti@aspeedtech.com Cc: sudheer veliseti , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, devicetree@vger.kernel.org, linux-aspeed@lists.ozlabs.org Subject: [patch v4 2/5] build configuration for AST2500 DMA UART driver Date: Fri, 26 Jul 2019 18:57:17 +0530 Message-Id: <1564147640-30753-3-git-send-email-open.sudheer@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1564147640-30753-1-git-send-email-open.sudheer@gmail.com> References: <1564147640-30753-1-git-send-email-open.sudheer@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: sudheer veliseti build config for DMA based UART driver in AST2500. Total Available UARTs in AST2500 are 4 Signed-off-by: sudheer veliseti --- Changes from v3->v4: - config name changed to SERIAL_AST_DMA_UART - new config AST_UART_DMA_RX_INTERRUPT introduced for selectin between DMA interrupt based RX vs timer based uart RX Changes in v2->v3: - change logs added drivers/tty/serial/8250/Kconfig | 43 ++++++++++++++++++++++++++++++++ drivers/tty/serial/8250/Makefile | 1 + 2 files changed, 44 insertions(+) diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 15c2c5463835..7052ab0f4894 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -189,6 +189,49 @@ config SERIAL_8250_RUNTIME_UARTS with the module parameter "nr_uarts", or boot-time parameter 8250.nr_uarts +config SERIAL_AST_DMA_UART + tristate "AST UART driver with DMA" + select SERIAL_CORE + help + UART driver with DMA support for Aspeed BMC AST25XX. + this driver supports UARTs in AST2500. It uses + DMA channel of DMA engines present in these chips. + since this dma engine is used only by UARTs it is not + added as a separate DMA driver instead added as a layer + within UART driver. + +config AST_UART_DMA_RX_INTERRUPT + bool "DMA interrupt of UART RX" + depends on SERIAL_AST_DMA_UART + default y + help + This config is Enabled by default,which means Rx part + of UART is handled by DMA interrupt. + if the version of chip AST2500 doesn't support + DMA interrupt based RX,then Disable this option.Refer + driver code to see how Rx is handled by timer,if Rx + interrupt is not available. + + +config AST_NR_DMA_UARTS + int "Maximum number of uart dma serial ports" + depends on SERIAL_AST_DMA_UART + default "4" + help + Set this to the number of serial ports you want the driver + to support. This includes any ports discovered via ACPI or + PCI enumeration and any ports that may be added at run-time + via hot-plug, or any ISA multi-port serial cards. + +config AST_RUNTIME_DMA_UARTS + int "Number of uart dma serial ports to register at runtime" + depends on SERIAL_AST_DMA_UART + range 0 AST_NR_DMA_UARTS + default "4" + help + Set this to the maximum number of serial ports you want + the kernel to register at boot time. + config SERIAL_8250_EXTENDED bool "Extended 8250/16550 serial driver options" depends on SERIAL_8250 diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile index 18751bc63a84..251f2e85efa1 100644 --- a/drivers/tty/serial/8250/Makefile +++ b/drivers/tty/serial/8250/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_SERIAL_8250_LPSS) += 8250_lpss.o obj-$(CONFIG_SERIAL_8250_MID) += 8250_mid.o obj-$(CONFIG_SERIAL_8250_MOXA) += 8250_moxa.o obj-$(CONFIG_SERIAL_8250_PXA) += 8250_pxa.o +obj-$(CONFIG_SERIAL_AST_DMA_UART) += 8250_ast2500_uart_dma.o obj-$(CONFIG_SERIAL_OF_PLATFORM) += 8250_of.o CFLAGS_8250_ingenic.o += -I$(srctree)/scripts/dtc/libfdt -- 2.17.1