From patchwork Fri Jun 20 14:52:51 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen-Yu Tsai X-Patchwork-Id: 4389961 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 02D3CBEEAA for ; Fri, 20 Jun 2014 14:57:03 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 18F1C203AE for ; Fri, 20 Jun 2014 14:57:02 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C0659203A0 for ; Fri, 20 Jun 2014 14:57:00 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Wy0CB-0007uN-FZ; Fri, 20 Jun 2014 14:53:39 +0000 Received: from mirror2.csie.ntu.edu.tw ([140.112.30.76]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Wy0Bv-0007Yj-ER for linux-arm-kernel@lists.infradead.org; Fri, 20 Jun 2014 14:53:29 +0000 Received: from wens by mirror2.csie.ntu.edu.tw with local (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1Wy0BU-0006K3-Li; Fri, 20 Jun 2014 22:52:56 +0800 From: Chen-Yu Tsai To: Maxime Ripard Subject: [PATCH v3 2/4] ARM: sunxi: Add earlyprintk support using R_UART (sun6i/sun8i) Date: Fri, 20 Jun 2014 22:52:51 +0800 Message-Id: <1403275973-24259-3-git-send-email-wens@csie.org> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1403275973-24259-1-git-send-email-wens@csie.org> References: <1403275973-24259-1-git-send-email-wens@csie.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140620_075323_695693_96C92F91 X-CRM114-Status: UNSURE ( 8.51 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.0 (/) Cc: devicetree@vger.kernel.org, Chen-Yu Tsai , linux-sunxi@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP sun6i/sun8i have a UART in the RTC block group, which can be used as an early console. This is most useful on sun8i as UART0 is muxed with MMC0, which is not available if we boot from MMC. Signed-off-by: Chen-Yu Tsai Acked-by: Maxime Ripard --- arch/arm/Kconfig.debug | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 8f90595..3548612 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -715,6 +715,14 @@ choice Say Y here if you want kernel low-level debugging support on Allwinner A1X based platforms on the UART1. + config DEBUG_SUNXI_R_UART + bool "Kernel low-level debugging messages via sunXi R_UART" + depends on MACH_SUN6I || MACH_SUN8I + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on Allwinner A31/A23 based platforms on the R_UART. + config TEGRA_DEBUG_UART_AUTO_ODMDATA bool "Kernel low-level debugging messages via Tegra UART via ODMDATA" depends on ARCH_TEGRA @@ -1043,6 +1051,7 @@ config DEBUG_UART_PHYS default 0x01c28400 if DEBUG_SUNXI_UART1 default 0x01d0c000 if DEBUG_DAVINCI_DA8XX_UART1 default 0x01d0d000 if DEBUG_DAVINCI_DA8XX_UART2 + default 0x01f02800 if DEBUG_SUNXI_R_UART default 0x02530c00 if DEBUG_KEYSTONE_UART0 default 0x02531000 if DEBUG_KEYSTONE_UART1 default 0x03010fe0 if ARCH_RPC @@ -1118,6 +1127,7 @@ config DEBUG_UART_VIRT default 0xf1600000 if ARCH_INTEGRATOR default 0xf1c28000 if DEBUG_SUNXI_UART0 default 0xf1c28400 if DEBUG_SUNXI_UART1 + default 0xf1f02800 if DEBUG_SUNXI_R_UART default 0xf2100000 if DEBUG_PXA_UART1 default 0xf4090000 if ARCH_LPC32XX default 0xf4200000 if ARCH_GEMINI