From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754379AbdC1J0y (ORCPT ); Tue, 28 Mar 2017 05:26:54 -0400 Received: from mail-wr0-f196.google.com ([209.85.128.196]:36266 "EHLO mail-wr0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753110AbdC1J0t (ORCPT ); Tue, 28 Mar 2017 05:26:49 -0400 From: Helmut Klein To: gregkh@linuxfoundation.org, carlo@caione.org, khilman@baylibre.com Cc: Helmut Klein , linux-serial@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2,3/3] tty/serial: meson_uart: add the core clock handling to the driver Date: Tue, 28 Mar 2017 11:25:45 +0200 Message-Id: <20170328092545.4644-4-hgkr.klein@gmail.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170328092545.4644-1-hgkr.klein@gmail.com> References: <20170328092545.4644-1-hgkr.klein@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch gets the core clock as provided by the DT and enables it. The code was taken from Amlogic's serial driver, and was tested on my board. Signed-off-by: Helmut Klein --- drivers/tty/serial/meson_uart.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c index 60f16795d16b..cb99112288eb 100644 --- a/drivers/tty/serial/meson_uart.c +++ b/drivers/tty/serial/meson_uart.c @@ -600,6 +600,7 @@ static int meson_uart_probe(struct platform_device *pdev) struct resource *res_mem, *res_irq; struct uart_port *port; struct clk *clk; + struct clk *core_clk; int ret = 0; if (pdev->dev.of_node) @@ -625,6 +626,15 @@ static int meson_uart_probe(struct platform_device *pdev) if (!port) return -ENOMEM; + core_clk = devm_clk_get(&pdev->dev, "core"); + if (!IS_ERR(core_clk)) { + ret = clk_prepare_enable(core_clk); + if (ret) { + dev_err(&pdev->dev, "couldn't enable clkc\n"); + return ret; + } + } + clk = clk_get(&pdev->dev, NULL); if (IS_ERR(clk)) return PTR_ERR(clk); -- 2.11.0