From mboxrd@z Thu Jan 1 00:00:00 1970 From: hgkr.klein@gmail.com (Helmut Klein) Date: Tue, 28 Mar 2017 11:25:45 +0200 Subject: [PATCH v2, 3/3] tty/serial: meson_uart: add the core clock handling to the driver In-Reply-To: <20170328092545.4644-1-hgkr.klein@gmail.com> References: <20170328092545.4644-1-hgkr.klein@gmail.com> Message-ID: <20170328092545.4644-4-hgkr.klein@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.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