From patchwork Wed Dec 29 13:53:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Tu X-Patchwork-Id: 12700938 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 1E2BAC433F5 for ; Wed, 29 Dec 2021 13:56:01 +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=KM/4p03sCQgODqQ3ueG31WRm3ktzL5Oh9Prp96iCmgM=; b=mywP/E/awBTD02 gewnzmJ5U+ez6ZPuy3apEnVJLifuMQYGOocVr3nOKd9mwFx4olufD2XvZ6SH3judymiekUwNIP520 lQRjwCTwmExdTW7afDvRsNg63owYNKw6zOOIW6rC+YqnRESFJxWwYf9zwJ9vOrGMoPIpcIZyJh1b9 OOOk28Zx48hSfkuwyAdTchzJDk/Io+OfG0jTnwIwLtADpnSF6EGDndpE11twWRKqODDsGfEKQU0E3 VQPTEJzd6adl6rsTIKQbSs0xLtSO/iWFCM5b2MtVTt2ujY7o8rwIZGUfX4bTeeGWR6GSECjadFmmo WiC99BLOCkuOvMAt/cCg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n2ZQq-002rno-Hx; Wed, 29 Dec 2021 13:55:56 +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 1n2ZQT-002rXG-1Q; Wed, 29 Dec 2021 13:55:34 +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; Wed, 29 Dec 2021 21:55:30 +0800 From: Yu Tu To: , , , CC: Greg Kroah-Hartman , Jiri Slaby , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Yu Tu Subject: [PATCH V2 5/6] tty: serial: meson: meson_uart_shutdown omit clear AML_UART_TX_EN bit Date: Wed, 29 Dec 2021 21:53:49 +0800 Message-ID: <20211229135350.9659-6-yu.tu@amlogic.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211229135350.9659-1-yu.tu@amlogic.com> References: <20211229135350.9659-1-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-20211229_055533_103626_F76E235F X-CRM114-Status: UNSURE ( 8.44 ) 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 9b07e3534969..c17109d6d441 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);