From patchwork Thu Dec 30 10:21:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Tu X-Patchwork-Id: 12701381 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5018DC433EF for ; Thu, 30 Dec 2021 10:23:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=fLyTGA4cKEMWzMALEpwZDEAExjjjubJ9iNSlBiK0uq0=; b=VOTXFZ6Zkh7n4c /Vm4HBYJsU63bJRWjK7RYqCl8OC30QGUzMJF7OZxgb2LFPwRqO6Gz6XoWmVr8myPd6uxQHHaMUr82 g9jPf7KeU85zdmrtXx2sKjYsdkZtyNlAqQC9pWuq/V/R4tvWPHsb7pG0ru91/KzQ17bSabEH//Yr9 LeFnw4uPW/BlgPbddJwS7mDjkcNrtW1uZ/FZmNe8n+LJl5DQ8kjftJ7sqC73p5ycph4wM0jiveSZE QxuTSf/cbYPsOqdZ6keC3pl+L0btCO1U7xylBkJJp7U2IG5nZWntoIR+4YThlrZV3QVSLmhB8ArbA iSponjOvsWhEc2KGzIyw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n2sah-004CRK-SK; Thu, 30 Dec 2021 10:23:23 +0000 Received: from mail-sh.amlogic.com ([58.32.228.43]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1n2saI-004C9L-VH; Thu, 30 Dec 2021 10:23:02 +0000 Received: from droid06.amlogic.com (10.18.11.248) by mail-sh.amlogic.com (10.18.11.5) with Microsoft SMTP Server id 15.1.2176.14; Thu, 30 Dec 2021 18:22:56 +0800 From: Yu Tu To: , , , CC: Greg Kroah-Hartman , Jiri Slaby , Neil Armstrong , Vyacheslav , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Yu Tu Subject: [PATCH V3 5/6] tty: serial: meson: meson_uart_shutdown omit clear AML_UART_TX_EN bit Date: Thu, 30 Dec 2021 18:21:09 +0800 Message-ID: <20211230102110.3861-6-yu.tu@amlogic.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211230102110.3861-1-yu.tu@amlogic.com> References: <20211230102110.3861-1-yu.tu@amlogic.com> MIME-Version: 1.0 X-Originating-IP: [10.18.11.248] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211230_022259_065213_BDC93AEB X-CRM114-Status: UNSURE ( 7.91 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org This change is an improvement. The meson_uart_shutdown function should have the opposite operation to the meson_uart_startup function, but the meson_uart_shutdown of AML_UART_TX_EN is logically missing. Signed-off-by: Yu Tu --- drivers/tty/serial/meson_uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c index 07eb1f40aaaa..45e41f20cba3 100644 --- a/drivers/tty/serial/meson_uart.c +++ b/drivers/tty/serial/meson_uart.c @@ -140,7 +140,7 @@ static void meson_uart_shutdown(struct uart_port *port) spin_lock_irqsave(&port->lock, flags); val = readl(port->membase + AML_UART_CONTROL); - val &= ~AML_UART_RX_EN; + val &= ~(AML_UART_RX_EN | AML_UART_TX_EN); val &= ~(AML_UART_RX_INT_EN | AML_UART_TX_INT_EN); writel(val, port->membase + AML_UART_CONTROL);